[kuldip.kadam]

When i remove all elements from the vector it gives me java.lang.ArrayIndexOutOfBoundsException exception.

//@Author: Kuldip
import java.util.Random;
import java.util.Vector;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.game.Sprite;
import javax.microedition.lcdui.Graphics;

public class Obstacles {

    static public Image obst_airplane, 
                        obst_cloud_flat, 
                        obst_cloud_medium,
                        obst_cloud_small, 
                        obst_cloud_thinline, 
                        obst_ring,
                        obst_parachute,
                        obst_chocopack;
    
    static public Image airplane_collided,
                        cloudflat_collided, 
                        cloudmed_collided, 
                        cloudsmall_collided, 
                        cloudthin_collided,
                        ring_collided1,
                        ring_collided2,
                        parachute_collided;
    
    Vector obsCloudVec = new Vector();
    Vector obsRingVec = new Vector();
    Vector obsAirplaneVec = new Vector();
    Vector obsParachuteVec = new Vector();
    Vector obsChocopackVec = new Vector();
    
    Vector obsCloudcollidedVec = new Vector();
    Vector obsRingcollidedVec = new Vector();
    Vector obsAirplanecollidedVec = new Vector();
    Vector obsParachutecollidedVec = new Vector();
    //Vector<Integer> obstTypeVec;
    
    Sprite obstCloudSprite, obstCloudMovSprite,
            obstRingSprite, obstRingMovSprite,
            obstAirplaneSprite, obstAirplaneMovSprite,
            obstParachuteSprite, obstParachuteMovSprite,
            obstChocoPackSprite, obstChocoPackMovSprite;
    
    Sprite obstCloudcollidedSprite, obstCloudcollidedMovSprite,
            obstRingcollidedSprite, obstRingMovcollidedSprite,
            obstAirplanecollidedSprite, obstAirplanecollidedMovSprite,
            obstParachutecollidedSprite,obstParachutecollidedMovSprite;
    
    Sprite M_obstMovSprite;
    
    public int obstacles_type_cloud = 0, 
                number_obst_type_cloud = 4;
    public int obstacles_type_cloudcollided = 0, 
                number_obst_type_cloudcollided = 4;
    
    public int temp_HEIGHT, 
                temp_WIDTH, 
                parchuteY;
    
    public Random MyRandom;
    
    Sprite clouds[];
    Sprite cloudsCollided[];    
    
    Sprite ring;
    Sprite ringCollided;
    
    Sprite airplane;
    Sprite airplaneCollided;
    
    Sprite Parachute;
    Sprite ParachuteCollided;
    
    Sprite Chocopack;
    
    Vector vectorMovingCloudImg = new Vector();
    Vector vectorMovingRingImg = new Vector();
    Vector vectorMovingAirplaneImg = new Vector();
    Vector vectorMovingParachuteImg = new Vector();
    Vector vectorMovingChocoPackImg = new Vector();
    
    Vector vectorMovingCloudCollidedImg = new Vector();
    Vector vectorMovingRingCollidedImg = new Vector();
    Vector vectorMovingAirplaneCollidedImg = new Vector();
    Vector vectorMovingParachuteCollidedImg = new Vector();
    
    public int ring_collision, 
                airplane_collision, 
                cloud_collision,
                cloudid, 
                parachute_collision,
                chocopack_collision;
    public int wrappercount,
                collisioncount;
    
    boolean collision;
    
    GameScreen objGameScreen;

    public Obstacles(GameScreen objGameScreen) {
        this.objGameScreen=objGameScreen;

        initVariables_obstacles();
    }

    public void initVariables_obstacles() {

        CreateObstacles_Images();

        clouds = new Sprite[number_obst_type_cloud];
        cloudsCollided = new Sprite[number_obst_type_cloudcollided]; 
        
        ring_collision=0;
        airplane_collision=0;
        cloud_collision=0;
        parachute_collision=0;
        chocopack_collision=0;
        parchuteY=objGameScreen.HEIGHT-70;
        wrappercount=0;
        collisioncount=0;
        collision=true;
        removeAllElements();
        
        MyRandom = new Random();

        
    }

    public void CreateObstacles_Images() {
        try {
            /*----------------before collision images-------------------*/
            obst_airplane = Image.createImage("/game/Airplane.png");
            obst_cloud_flat = Image.createImage("/game/cloud_flat.png");
            obst_cloud_medium = Image.createImage("/game/cloud_medium.png");
            obst_cloud_small = Image.createImage("/game/cloud_small.png");
            obst_cloud_thinline = Image.createImage("/game/cloud_thinline.png");
            obst_ring = Image.createImage("/game/ring.png");
            obst_parachute = Image.createImage("/game/parachute.png");
            obst_chocopack = Image.createImage("/game/chocopack.png"); 
         
            /*----------------after collision images-------------------*/
            airplane_collided = Image.createImage("/game/Airplane_Chocolaty.png");
            ring_collided1 = Image.createImage("/game/ring_Chocolaty1.png");
            ring_collided2 = Image.createImage("/game/ring_Chocolaty2.png");
            cloudflat_collided = Image.createImage("/game/cloud_flat_Chocolaty.png");
            cloudmed_collided = Image.createImage("/game/cloud_medium_Chocolaty.png");
            cloudsmall_collided = Image.createImage("/game/cloud_small_Chocolaty.png");
            cloudthin_collided = Image.createImage("/game/cloud_thinline_Chocolaty.png");
            parachute_collided = Image.createImage("/game/parachute_chocolaty.png");
            
        } catch (Exception e) {
            System.out.println("Exception in creating obstacle images...." + e);
        }
    }
    
    /*------------------------------------Collision Method--------------------------------------*/
     public void collision_with_obstacles(Image charImg, int chrXpos,
    int charYpos, Sprite obstImg, int obsXpos, int obsYpos, int obstType,int i) {

         //************* Ring collision detection **************
         if (obstType == 1) {
             if (((chrXpos + charImg.getWidth()) - 30 >= obsXpos) && (chrXpos <= (obsXpos + obstImg.getWidth()) - 20)
                     && ((charYpos + charImg.getHeight()) - 50 >= obsYpos) && (charYpos <= (obsYpos + obstImg.getHeight()) - 10)) {

                 called_when_collided();

                 //vectorMovingRingImg.removeElementAt(i);
                 if (ring_collision <= 1) {

                     add_RingCollided1(obsXpos, obsYpos, i);
                     add_RingCollided2(obsXpos, obsYpos, i);

                 }

             }
         }
         //********************Airplane collision detection***************
         if (obstType == 2) {
             if (((chrXpos + charImg.getWidth()) - 20 >= obsXpos) && (chrXpos <= (obsXpos + obstImg.getWidth()) - 20)
                     && ((charYpos + charImg.getHeight()) - 40 >= obsYpos) && (charYpos <= (obsYpos + obstImg.getHeight()) + 10)) {

                 called_when_collided();
                 if (collision == true) {
                     if (airplane_collision == 1) {
                         if (collisioncount < 2) {

                             collisioncount++;

                             collision = false;

                         } else {
                             //removeAllElements();
                             objGameScreen.resetGame();
                         }
                     }
                 }
                 if (airplane_collision <= 1) {

                     try {
                         add_AirplaneCollided(obsXpos, obsYpos, i);
                     } catch (Exception e) {
                         System.out.println(" Exception 1 " + e);
                     }

                 }
             }

         } //************************Cloud collision detection**********************
         else if (obstType == 3) {
             if (((chrXpos + charImg.getWidth() - 5) >= obsXpos) && (chrXpos <= (obsXpos + obstImg.getWidth()))
                     && ((charYpos + charImg.getHeight()) >= obsYpos) && (charYpos <= (obsYpos + obstImg.getHeight()) + 20)) {

                 called_when_collided();
                 if (collision = true) {
                     if (cloud_collision == 1) {
                         if (collisioncount < 2) {
                             collisioncount++;

                             collision = false;
                         } else {
                             // removeAllElements();
                             objGameScreen.resetGame();
                         }
                     }
                 }

                 //vectorMovingCloudImg.removeElementAt(i);
                 if (cloud_collision <= 1) {

                     try {
                         add_CloudCollided(obsXpos, obsYpos, i, cloudid);
                     } catch (Exception e) {
                         System.out.println(" Exception 2 " + e);
                     }

                 }
             }

         }

         //************************Parachute collision detection********************
         if (obstType == 4) {
             if (((chrXpos + charImg.getWidth() - 20) >= obsXpos) && (chrXpos <= (obsXpos + obstImg.getWidth() - 20))
                     && ((charYpos + charImg.getHeight() - 30) >= obsYpos) && (charYpos <= (obsYpos + obstImg.getHeight()))) {

                 called_when_collided();
                 if (collision == true) {
                     if (parachute_collision == 1) {
                         if (collisioncount < 2) {
                             collisioncount++;
                             collision = false;
                         } else {
                             //removeAllElements();
                             objGameScreen.resetGame();
                         }
                     }
                 }
                 System.out.println("collided with parachute................");
                 //vectorMovingRingImg.removeElementAt(i);
                 if (parachute_collision <= 1) {
                     try {
                         add_ParachuteCollided(obsXpos, obsYpos, i);
                     } catch (Exception e) {
                         System.out.println(" Exception 3 " + e);
                     }


                 }

             }
         }

         //************************ChocoPack collision detection********************
         if (obstType == 5) {
             if (((chrXpos + charImg.getWidth() - 20) >= obsXpos) && (chrXpos <= (obsXpos + obstImg.getWidth()))
                     && ((charYpos + charImg.getHeight() - 20) >= obsYpos) && (charYpos <= (obsYpos + obstImg.getHeight() + 20))) {
                 wrappercount++;
                 called_when_collided();
                 System.out.println("collided with ChocoPack................");

                 if (chocopack_collision <= 1) {

                     vectorMovingChocoPackImg.removeElementAt(i);

                 }

             }
         }

    }
    
        
    public void removeAllElements(){
        /*obsCloudVec.removeAllElements();
        obsRingVec.removeAllElements();
        obsAirplaneVec.removeAllElements();
        obsParachuteVec.removeAllElements();
        obsChocopackVec.removeAllElements();*/

        obsCloudcollidedVec.removeAllElements();
        obsRingcollidedVec.removeAllElements();
        obsAirplanecollidedVec.removeAllElements();
        obsParachutecollidedVec.removeAllElements();

       vectorMovingCloudImg.removeAllElements() ;
        vectorMovingRingImg.removeAllElements() ;
        vectorMovingAirplaneImg.removeAllElements();
        vectorMovingParachuteImg.removeAllElements();
       // vectorMovingChocoPackImg.removeAllElements();

        vectorMovingCloudCollidedImg.removeAllElements();
        vectorMovingRingCollidedImg.removeAllElements();
        vectorMovingAirplaneCollidedImg.removeAllElements();
        vectorMovingParachuteCollidedImg.removeAllElements();
        
    }
    


    public int randomCloudObstacles() {

        obstacles_type_cloud = (int) (Math.abs(MyRandom.nextInt() % number_obst_type_cloud));
        obstacles_type_cloudcollided = (int) (Math.abs(MyRandom.nextInt() % number_obst_type_cloudcollided));
             
        return obstacles_type_cloud;
    }

    public void addCloudObstacles() {
        // temp_HEIGHT = GameView.temp_HEIGHT;
        // temp_WIDTH = GameView.temp_WIDTH;

        //	if(!obstTypeVec.isEmpty())
        //obstTypeVec.removeAllElements();

        switch (randomCloudObstacles()) {

            case 1:
                obstCloudSprite = new Sprite(obst_cloud_flat, temp_WIDTH + obst_cloud_flat.getWidth(), temp_HEIGHT - obst_cloud_flat.getHeight());
                obsCloudVec.addElement(obstCloudSprite);
                //obstTypeVec.addElement(2);
                break;
            case 2:
                obstCloudSprite = new Sprite(obst_cloud_medium, temp_WIDTH + obst_cloud_medium.getWidth(), temp_HEIGHT - obst_cloud_medium.getHeight());
                obsCloudVec.addElement(obstCloudSprite);
                //obstTypeVec.addElement(3);
                break;
            case 3:
                obstCloudSprite = new Sprite(obst_cloud_small, temp_WIDTH + obst_cloud_small.getWidth(), temp_HEIGHT - obst_cloud_small.getHeight());
                obsCloudVec.addElement(obstCloudSprite);
                //obstTypeVec.addElement(4);
                break;
            case 4:
                obstCloudSprite = new Sprite(obst_cloud_thinline, temp_WIDTH + obst_cloud_thinline.getWidth(), temp_HEIGHT - obst_cloud_thinline.getHeight());
                obsCloudVec.addElement(obstCloudSprite);
                //obstTypeVec.addElement(4);
                break;


            default:
                obstCloudSprite = new Sprite(obst_cloud_small, temp_WIDTH+ obst_cloud_small.getWidth(), temp_HEIGHT - obst_cloud_small.getHeight());
                obsCloudVec.addElement(obstCloudSprite);
                break;
        }

    }
    public void addCloudCollidedObstacles() {
        // temp_HEIGHT = GameView.temp_HEIGHT;
        // temp_WIDTH = GameView.temp_WIDTH;

        //	if(!obstTypeVec.isEmpty())
        //obstTypeVec.removeAllElements();

        switch (randomCloudObstacles()) {

            case 1:
                obstCloudcollidedSprite = new Sprite(cloudflat_collided, temp_WIDTH + cloudflat_collided.getWidth(), temp_HEIGHT - cloudflat_collided.getHeight());
                obsCloudVec.addElement(obstCloudcollidedSprite);
                //obstTypeVec.addElement(2);
                break;
            case 2:
                obstCloudcollidedSprite = new Sprite(cloudmed_collided, temp_WIDTH + cloudmed_collided.getWidth(), temp_HEIGHT - cloudmed_collided.getHeight());
                obsCloudVec.addElement(obstCloudcollidedSprite);
                //obstTypeVec.addElement(3);
                break;
            case 3:
                obstCloudSprite = new Sprite(cloudsmall_collided, temp_WIDTH + cloudsmall_collided.getWidth(), temp_HEIGHT - cloudsmall_collided.getHeight());
                obsCloudVec.addElement(obstCloudcollidedSprite);
                //obstTypeVec.addElement(4);
                break;
            case 4:
                obstCloudSprite = new Sprite(cloudthin_collided, temp_WIDTH + cloudthin_collided.getWidth(), temp_HEIGHT - cloudthin_collided.getHeight());
                obsCloudVec.addElement(obstCloudcollidedSprite);
                //obstTypeVec.addElement(4);
                break;


            default:
                obstCloudSprite = new Sprite(cloudsmall_collided, temp_WIDTH + cloudsmall_collided.getWidth(), temp_HEIGHT - cloudsmall_collided.getHeight());
                obsCloudVec.addElement(obstCloudcollidedSprite);
                break;
        }

    }
    

    public void addRingObstacle() {
        obstRingSprite = new Sprite(obst_ring, temp_WIDTH + obst_ring.getWidth(), temp_HEIGHT - obst_ring.getHeight());
        obsRingVec.addElement(obstRingSprite);

    }
    public void addRingCollidedObstacle() {
        obstRingcollidedSprite = new Sprite(ring_collided1, temp_WIDTH + obst_ring.getWidth(), temp_HEIGHT - obst_ring.getHeight());
        obsRingVec.addElement(obstRingSprite);

    }
    public void addAirplaneObstacle() {
        obstAirplaneSprite = new Sprite(obst_airplane, temp_WIDTH + obst_airplane.getWidth(), temp_HEIGHT - obst_airplane.getHeight());
        obsAirplaneVec.addElement(obstAirplaneSprite);
        

    }
    
    public void addAirplaneCollidedObstacle() {
        obstAirplanecollidedSprite = new Sprite(airplane_collided, temp_WIDTH + airplane_collided.getWidth(), temp_HEIGHT - airplane_collided.getHeight());
        obsAirplaneVec.addElement(obstAirplanecollidedSprite);

    }
    
    public void addParachuteObstacle(){
        obstParachuteSprite = new Sprite(obst_parachute, temp_WIDTH + obst_parachute.getWidth(), temp_HEIGHT - obst_parachute.getHeight());
        obsParachuteVec.addElement(obstParachuteSprite);
        
    }
    
    public void addParachuteCollidedObstacle() {
        obstParachutecollidedSprite = new Sprite(parachute_collided, temp_WIDTH + parachute_collided.getWidth(), temp_HEIGHT - parachute_collided.getHeight());
        obsParachuteVec.addElement(obstParachutecollidedSprite);

    }
    
    public void addChocoPackObstacle(){
        obstChocoPackSprite = new Sprite(obst_chocopack, temp_WIDTH + obst_chocopack.getWidth(), temp_HEIGHT - obst_chocopack.getHeight());
        obsChocopackVec.addElement(obstChocoPackSprite);
        
    }

    public void moveCloudObstacles() {
        for (int i = 0; i < obsCloudVec.size(); i++) {
            obstCloudMovSprite = (Sprite) obsCloudVec.elementAt(i);
            obstCloudMovSprite.move(-15, 20);
        }

        if (obsCloudVec.isEmpty()) {
            addCloudObstacles();
        }
    }
    public void moveCloudCollidedObstacles() {
        for (int i = 0; i < obsCloudVec.size(); i++) {
            obstCloudMovSprite = (Sprite) obsCloudVec.elementAt(i);
            obstCloudMovSprite.move(-15, 20);
        }
        

        if (obsCloudVec.isEmpty()) {
            addCloudCollidedObstacles();
        }
    }

    public void moveRingObstacles() {
        for (int i = 0; i < obsRingVec.size(); i++) {
            obstRingMovSprite = (Sprite) obsRingVec.elementAt(i);
            obstRingMovSprite.move(-15, 20);
        }

        if (obsRingVec.isEmpty()) {
            addRingObstacle();
        }

    }
    
    public void moveAirplaneObstacles() {
        for (int i = 0; i < obsAirplaneVec.size(); i++) {
            obstAirplaneMovSprite = (Sprite) obsAirplaneVec.elementAt(i);
            obstAirplaneMovSprite.move(-15, 20);
        }

        if (obsAirplaneVec.isEmpty()) {
            addAirplaneObstacle();
        }

    }
    
    public void moveAirplaneCollisionObstacles() {
        for (int i = 0; i < obsAirplaneVec.size(); i++) {
            obstAirplanecollidedMovSprite = (Sprite) obsAirplaneVec.elementAt(i);
            obstAirplanecollidedMovSprite.move(-15, 20);
        }

        if (obsAirplaneVec.isEmpty()) {
            addAirplaneCollidedObstacle();
        }

    }
    
    public void moveParachuteObstacles() {
        for (int i = 0; i < obsParachuteVec.size(); i++) {
            obstParachuteMovSprite = (Sprite) obsParachuteVec.elementAt(i);
            obstParachuteMovSprite.move(-15, 20);
        }

        if (obsParachuteVec.isEmpty()) {
            addParachuteObstacle();
        }

    }
    
    public void moveChocoPackObstacles() {
        for (int i = 0; i < obsChocopackVec.size(); i++) {
            obstChocoPackMovSprite = (Sprite) obsChocopackVec.elementAt(i);
            obstChocoPackMovSprite.move(-15, 20);
        }

        if (obsChocopackVec.isEmpty()) {
            addChocoPackObstacle();
        }

    }

    public void drawObstacles(Graphics canvas) {

        System.out.println("RANDOM NUMBER : " + randomCloudObstacles());
         }
    /*--------------------to generate random number----------------------*/
    private static int showRandomInteger(int aStart, int aEnd, Random aRandom) {

        int range = (int) aEnd - (int) aStart + 1;
        int fraction = (int) (Math.abs(aRandom.nextInt() % range));
        int randomNumber = (int) (fraction + aStart);
        return randomNumber;

    }

    public void addCloud(int type) {
        switch (type) {
            /*case 0:
            clouds[0] = new Sprite(obst_cloud_big);
            clouds[0].setPosition(240, 25);
            vectorMovingCloudImg.addElement(clouds[0]);
            
            break;*/
            case 0:
                cloudid=0;
                clouds[0] = new Sprite(obst_cloud_flat);
                clouds[0].setPosition(240, 25);
                vectorMovingCloudImg.addElement(clouds[0]);
                break;
            case 1:
                cloudid=1;
                clouds[1] = new Sprite(obst_cloud_medium);
                clouds[1].setPosition(240, 25);
                vectorMovingCloudImg.addElement(clouds[1]);
                break;
            case 2:
                cloudid=2;
                clouds[2] = new Sprite(obst_cloud_small);
                clouds[2].setPosition(240, 30);
                vectorMovingCloudImg.addElement(clouds[2]);
                break;
            case 3:
                cloudid=3;
                clouds[3] = new Sprite(obst_cloud_thinline);
                clouds[3].setPosition(240, 25);
                vectorMovingCloudImg.addElement(clouds[3]);
                break;
        }

        System.out.println("MyRandom......." + MyRandom);

    }
    public void add_CloudCollided(int x,int y,int i,int type) {   
        cloud_collision++;
        switch (type) {
            /*case 0:
            clouds[0] = new Sprite(obst_cloud_big);
            clouds[0].setPosition(240, 25);
            vectorMovingCloudImg.addElement(clouds[0]);
            
            break;*/
            case 0:
                
                cloudsCollided[0] = new Sprite(cloudflat_collided);
                cloudsCollided[0].setPosition(x, y);
                vectorMovingCloudImg.removeElementAt(i);
                vectorMovingCloudImg.insertElementAt(cloudsCollided[0],i);
                break;
            case 1:
                cloudid=1;
                cloudsCollided[1] = new Sprite(cloudmed_collided);
                cloudsCollided[1].setPosition(x, y);
                vectorMovingCloudImg.removeElementAt(i);
                vectorMovingCloudImg.insertElementAt(cloudsCollided[1],i);
                break;
            case 2:
                cloudid=2;
                cloudsCollided[2] = new Sprite(cloudsmall_collided);
                cloudsCollided[2].setPosition(x, y);
                vectorMovingCloudImg.removeElementAt(i);
                vectorMovingCloudImg.insertElementAt(cloudsCollided[2],i);
                break;
            case 3:
                cloudid=3;
                cloudsCollided[3] = new Sprite(cloudthin_collided);
                cloudsCollided[3].setPosition(x, y);
                vectorMovingCloudImg.removeElementAt(i);
                vectorMovingCloudImg.insertElementAt(cloudsCollided[3],i);
                break;
        }
        
        
        
        //System.out.println("airplane collided called.........2");

    }

    

    public void add_Ring() {


        ring = new Sprite(obst_ring);
        ring.setPosition(240, showRandomInteger(50, 150, MyRandom));
        vectorMovingRingImg.addElement(ring);

    }
    public void add_RingCollided1(int x,int y,int i) {
       // System.out.println("airplane collided called.........1");

        ring_collision++;
        ringCollided= new Sprite(ring_collided1);
        ringCollided.setPosition(x,y);
        vectorMovingRingImg.removeElementAt(i);
        vectorMovingRingImg.insertElementAt(ringCollided,i);
        //System.out.println("airplane collided called.........2");

    }
    public void add_RingCollided2(int x,int y,int i) {
       // System.out.println("airplane collided called.........1");

        ring_collision++;
        ringCollided= new Sprite(ring_collided2);
        ringCollided.setPosition(x+18,y);
        //vectorMovingRingImg.removeElementAt(i);
        vectorMovingRingImg.insertElementAt(ringCollided,i);
        //System.out.println("airplane collided called.........2");

    }
    
    public void add_Airplane() {


        airplane = new Sprite(obst_airplane);
        airplane.setPosition(240, showRandomInteger(50, 120, MyRandom));
        vectorMovingAirplaneImg.addElement(airplane);

    }
    
    public void add_AirplaneCollided(int x,int y,int i) {
       // System.out.println("airplane collided called.........1");

        airplane_collision++;
        airplaneCollided = new Sprite(airplane_collided);
        airplaneCollided.setPosition(x,y);
        vectorMovingAirplaneImg.removeElementAt(i);
        vectorMovingAirplaneImg.insertElementAt(airplaneCollided,i);
        //System.out.println("airplane collided called.........2");

    }
    
    public void add_Parachute() {


        Parachute = new Sprite(obst_parachute);
        Parachute.setPosition(350, showRandomInteger(200, 320, MyRandom));
        vectorMovingParachuteImg.addElement(Parachute);

    }
    
    public void add_ParachuteCollided(int x,int y,int i) {
       // System.out.println("airplane collided called.........1");

        parachute_collision++;
        ParachuteCollided= new Sprite(parachute_collided);
        ParachuteCollided.setPosition(x,y);
        vectorMovingParachuteImg.removeElementAt(i);
        vectorMovingParachuteImg.insertElementAt(ParachuteCollided,i);
        //System.out.println("airplane collided called.........2");

    }
    
    public void add_ChocoPack() {


        Chocopack = new Sprite(obst_chocopack);
        Chocopack.setPosition(1700, showRandomInteger(50, 120, MyRandom));
        vectorMovingChocoPackImg.addElement(Chocopack);

    }
    
    public void add_ChocopackCollided(int x,int y,int i) {
       // System.out.println("airplane collided called.........1");

        chocopack_collision++;
        Chocopack.setPosition(x, y);
        
        vectorMovingChocoPackImg.removeElementAt(i);
        
        
        //System.out.println("airplane collided called.........2");

    }

    public void move_clouds() {
        // System.out.println(" vectorMvngImg.size() " + vectorMovingCloudImg.size());
        for (int i = 0; i < vectorMovingCloudImg.size(); i++) {
            Sprite HitTypeSP1 = (Sprite) vectorMovingCloudImg.elementAt(i);
            HitTypeSP1.move(-3, 0);
            if (HitTypeSP1.getX() < -(HitTypeSP1.getWidth() + 10)) {
                
                vectorMovingCloudImg.removeElementAt(i);
                // addCloud(randomCloudObstacles());
                cloud_collision=0;
                if(cloud_collision==0)
                    collision=true;
            }

        }
        if (vectorMovingCloudImg.size() < 1) {
            addCloud(randomCloudObstacles());
        }
    }

    public void move_ring() {
        for (int i = 0; i < vectorMovingRingImg.size(); i++) {
            Sprite HitTypeSP1 = (Sprite) vectorMovingRingImg.elementAt(i);
            HitTypeSP1.move(-7, 0);
            if (HitTypeSP1.getX()+1000 < -(HitTypeSP1.getWidth() + 10)) {
                vectorMovingRingImg.removeElementAt(i);
                ring_collision=0;
                collision=true;
            }

        }

        if (vectorMovingRingImg.size() < 1) {
            add_Ring();
        }

    }
    
    public void move_Airplane() {
        for (int i = 0; i < vectorMovingAirplaneImg.size(); i++) {
            Sprite HitTypeSP1 = (Sprite) vectorMovingAirplaneImg.elementAt(i);
            HitTypeSP1.move(-18,0);//(-18,0)
            if (HitTypeSP1.getX()+1000 < -(HitTypeSP1.getWidth() )) {
                vectorMovingAirplaneImg.removeElementAt(i);
                airplane_collision=0;
                
                    collision=true;
            }

        }

        if (vectorMovingAirplaneImg.size() < 1) {
            add_Airplane();
        }

    }
    
    public void move_parachute() {
        for (int i = 0; i < vectorMovingParachuteImg.size(); i++) {
            Sprite HitTypeSP1 = (Sprite) vectorMovingParachuteImg.elementAt(i);
            HitTypeSP1.move(-11, -showRandomInteger(1, 9, MyRandom)); //(-11, -showRandomInteger(1, 9, MyRandom))
            if (HitTypeSP1.getX()+1400 < -(HitTypeSP1.getWidth() )) {
                vectorMovingParachuteImg.removeElementAt(i);
                parachute_collision=0;
                
                    collision=true;
            }

        }

        if (vectorMovingParachuteImg.size() < 1) {
            add_Parachute();
        }

    }

    public void move_ChocoPack() {
        for (int i = 0; i < vectorMovingChocoPackImg.size(); i++) {
            Sprite HitTypeSP1 = (Sprite) vectorMovingChocoPackImg.elementAt(i);
            HitTypeSP1.move(-7, 0);
            if (HitTypeSP1.getX()+1400 < -(HitTypeSP1.getWidth() )) {
                vectorMovingChocoPackImg.removeElementAt(i);
                chocopack_collision=0;
                collision=true;
            }

        }

        if (vectorMovingChocoPackImg.size() <1) {
           
            add_ChocoPack();
        }

    }
    
    public void draw_cloud(Graphics g) {

        for (int i = 0; i < vectorMovingCloudImg.size(); i++) {
            Sprite HitTypeSP2 = (Sprite) vectorMovingCloudImg.elementAt(i);
            HitTypeSP2.paint(g);
            collision_with_obstacles(objGameScreen.imgBall[0], objGameScreen.cannonball.cannonballX, objGameScreen.cannonball.cannonballY, HitTypeSP2,  HitTypeSP2.getX(), HitTypeSP2.getY(),3,i);

        }


    }

    public void draw_ring(Graphics g) {
        for (int i = 0; i < vectorMovingRingImg.size(); i++) {
            Sprite HitTypeSP2 = (Sprite) vectorMovingRingImg.elementAt(i);
            HitTypeSP2.paint(g);
            collision_with_obstacles(objGameScreen.imgBall[0], objGameScreen.cannonball.cannonballX, objGameScreen.cannonball.cannonballY, HitTypeSP2,  HitTypeSP2.getX(), HitTypeSP2.getY(),1,i); 

        }
        
        }
    
    
    public void draw_Airplane(Graphics g) {
        for (int i = 0; i < vectorMovingAirplaneImg.size(); i++) {
            Sprite HitTypeSP2 = (Sprite) vectorMovingAirplaneImg.elementAt(i);
            HitTypeSP2.paint(g);
            collision_with_obstacles(objGameScreen.imgBall[0], objGameScreen.cannonball.cannonballX, objGameScreen.cannonball.cannonballY, HitTypeSP2,  HitTypeSP2.getX(), HitTypeSP2.getY(),2,i);

        }
    }
    
    public void draw_Parachute(Graphics g) {
        for (int i = 0; i < vectorMovingParachuteImg.size(); i++) {
            Sprite HitTypeSP2 = (Sprite) vectorMovingParachuteImg.elementAt(i);
            HitTypeSP2.paint(g);
            collision_with_obstacles(objGameScreen.imgBall[0], objGameScreen.cannonball.cannonballX, objGameScreen.cannonball.cannonballY, HitTypeSP2,  HitTypeSP2.getX(), HitTypeSP2.getY(),4,i);

        }
    }
    
    public void draw_ChocoPack(Graphics g) {
        for (int i = 0; i < vectorMovingChocoPackImg.size(); i++) {
            Sprite HitTypeSP2 = (Sprite) vectorMovingChocoPackImg.elementAt(i);
            HitTypeSP2.paint(g);
            collision_with_obstacles(objGameScreen.imgBall[0], objGameScreen.cannonball.cannonballX, objGameScreen.cannonball.cannonballY, HitTypeSP2,  HitTypeSP2.getX(), HitTypeSP2.getY(),5,i);

        }
    }
    

    public void called_when_collided() {
        
        
        
        
        
    }
}

This post has been edited by kuldip.kadam: 09 July 2012 - 12:29 AM

[pbl]

Where ?

[kuldip.kadam]

I have caught the exception below in a try catch block

//********************Airplane collision detection***************

//************************Cloud collision detection**********************

//************************Parachute collision detection********************

[SwiftStriker00]

It would be a lot of help to us, if you could post the error message you received. The entire stack trace.

That error means that you are trying to access an index in the array that isn't present. For example.

String[] ex = new String[2];
ex[0] = "hello";
ex[1] = "world";

//This would throw ArrayIndexOutOfBoundsException 
System.out.println( ex[5] );

[kuldip.kadam]

Below is the Exception:

TRACE: <at java.lang.ArrayIndexOutOfBoundsException>, Exception caught in Display class
java.lang.ArrayIndexOutOfBoundsException
at java.util.Vector.removeElementAt(Vector.java:510)
at o.a(), bci=399
at o.c(), bci=71
at f.a(), bci=2724
at n.paint(), bci=224
at javax.microedition.lcdui.CanvasLFImpl.uCallPaint(), bci=202
at javax.microedition.lcdui.Display.callPaint(), bci=149
at javax.microedition.lcdui.Display$DisplayEventConsumerImpl.handleRepaintEvent(), bci=11
at com.sun.midp.lcdui.RepaintEventProducer.process(), bci=55
at com.sun.midp.events.EventQueue.run(), bci=179
at java.lang.Thread.run(Thread.java:662)

Here is the code that is giving me that error.

//@Author: Kuldip
import java.util.Random;
import java.util.Vector;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.game.Sprite;
import javax.microedition.lcdui.Graphics;

public class Obstacles {

    static public Image obst_airplane, 
                        obst_cloud_flat, 
                        obst_cloud_medium,
                        obst_cloud_small, 
                        obst_cloud_thinline, 
                        obst_ring,
                        obst_parachute,
                        obst_chocopack;
    
    static public Image airplane_collided,
                        cloudflat_collided, 
                        cloudmed_collided, 
                        cloudsmall_collided, 
                        cloudthin_collided,
                        ring_collided1,
                        ring_collided2,
                        parachute_collided;
    
    Vector obsCloudVec = new Vector();
    Vector obsRingVec = new Vector();
    Vector obsAirplaneVec = new Vector();
    Vector obsParachuteVec = new Vector();
    Vector obsChocopackVec = new Vector();
    
    Vector obsCloudcollidedVec = new Vector();
    Vector obsRingcollidedVec = new Vector();
    Vector obsAirplanecollidedVec = new Vector();
    Vector obsParachutecollidedVec = new Vector();
    //Vector<Integer> obstTypeVec;
    
    Sprite obstCloudSprite, obstCloudMovSprite,
            obstRingSprite, obstRingMovSprite,
            obstAirplaneSprite, obstAirplaneMovSprite,
            obstParachuteSprite, obstParachuteMovSprite,
            obstChocoPackSprite, obstChocoPackMovSprite;
    
    Sprite obstCloudcollidedSprite, obstCloudcollidedMovSprite,
            obstRingcollidedSprite, obstRingMovcollidedSprite,
            obstAirplanecollidedSprite, obstAirplanecollidedMovSprite,
            obstParachutecollidedSprite,obstParachutecollidedMovSprite;
    
    Sprite M_obstMovSprite;
    
    public int obstacles_type_cloud = 0, 
                number_obst_type_cloud = 4;
    public int obstacles_type_cloudcollided = 0, 
                number_obst_type_cloudcollided = 4;
    
    public int temp_HEIGHT, 
                temp_WIDTH, 
                parchuteY;
    
    public Random MyRandom;
    
    Sprite clouds[];
    Sprite cloudsCollided[];    
    
    Sprite ring;
    Sprite ringCollided;
    
    Sprite airplane;
    Sprite airplaneCollided;
    
    Sprite Parachute;
    Sprite ParachuteCollided;
    
    Sprite Chocopack;
    
    Vector vectorMovingCloudImg = new Vector();
    Vector vectorMovingRingImg = new Vector();
    Vector vectorMovingAirplaneImg = new Vector();
    Vector vectorMovingParachuteImg = new Vector();
    Vector vectorMovingChocoPackImg = new Vector();
    
    Vector vectorMovingCloudCollidedImg = new Vector();
    Vector vectorMovingRingCollidedImg = new Vector();
    Vector vectorMovingAirplaneCollidedImg = new Vector();
    Vector vectorMovingParachuteCollidedImg = new Vector();
    
    public int ring_collision, 
                airplane_collision, 
                cloud_collision,
                cloudid, 
                parachute_collision,
                chocopack_collision;
    public int wrappercount,
                collisioncount;
    
    boolean collision;
    
    GameScreen objGameScreen;

    public Obstacles(GameScreen objGameScreen) {
        this.objGameScreen=objGameScreen;

        initVariables_obstacles();
    }

    public void initVariables_obstacles() {

        CreateObstacles_Images();

        clouds = new Sprite[number_obst_type_cloud];
        cloudsCollided = new Sprite[number_obst_type_cloudcollided]; 
        
        ring_collision=0;
        airplane_collision=0;
        cloud_collision=0;
        parachute_collision=0;
        chocopack_collision=0;
        parchuteY=objGameScreen.HEIGHT-70;
        wrappercount=0;
        collisioncount=0;
        collision=true;
        
        MyRandom = new Random();

        
    }

    public void CreateObstacles_Images() {
        try {
            /*----------------before collision images-------------------*/
            obst_airplane = Image.createImage("/game/Airplane.png");
            obst_cloud_flat = Image.createImage("/game/cloud_flat.png");
            obst_cloud_medium = Image.createImage("/game/cloud_medium.png");
            obst_cloud_small = Image.createImage("/game/cloud_small.png");
            obst_cloud_thinline = Image.createImage("/game/cloud_thinline.png");
            obst_ring = Image.createImage("/game/ring.png");
            obst_parachute = Image.createImage("/game/parachute.png");
            obst_chocopack = Image.createImage("/game/chocopack.png"); 
         
            /*----------------after collision images-------------------*/
            airplane_collided = Image.createImage("/game/Airplane_Chocolaty.png");
            ring_collided1 = Image.createImage("/game/ring_Chocolaty1.png");
            ring_collided2 = Image.createImage("/game/ring_Chocolaty2.png");
            cloudflat_collided = Image.createImage("/game/cloud_flat_Chocolaty.png");
            cloudmed_collided = Image.createImage("/game/cloud_medium_Chocolaty.png");
            cloudsmall_collided = Image.createImage("/game/cloud_small_Chocolaty.png");
            cloudthin_collided = Image.createImage("/game/cloud_thinline_Chocolaty.png");
            parachute_collided = Image.createImage("/game/parachute_chocolaty.png");
            
        } catch (Exception e) {
            System.out.println("Exception in creating obstacle images...." + e);
        }
    }
    
    /*------------------------------------Collision Method--------------------------------------*/
     public void collision_with_obstacles(Image charImg, int chrXpos,
    int charYpos, Sprite obstImg, int obsXpos, int obsYpos, int obstType,int i) {

         //************* Ring collision detection **************
         if (obstType == 1) {
             if (((chrXpos + charImg.getWidth()) - 30 >= obsXpos) && (chrXpos <= (obsXpos + obstImg.getWidth()) - 20)
                     && ((charYpos + charImg.getHeight()) - 50 >= obsYpos) && (charYpos <= (obsYpos + obstImg.getHeight()) - 10)) {

                 called_when_collided();

                 //vectorMovingRingImg.removeElementAt(i);
                 if (ring_collision <= 1) {

                     add_RingCollided1(obsXpos, obsYpos, i);
                     add_RingCollided2(obsXpos, obsYpos, i);

                 }

             }
         }
         //********************Airplane collision detection***************
         if (obstType == 2) {
             if (((chrXpos + charImg.getWidth()) - 20 >= obsXpos) && (chrXpos <= (obsXpos + obstImg.getWidth()) - 20)
                     && ((charYpos + charImg.getHeight()) - 40 >= obsYpos) && (charYpos <= (obsYpos + obstImg.getHeight()) + 10)) {

                 called_when_collided();
                 if (collision == true) {
                     if (airplane_collision == 1) {
                         if (collisioncount < 2) {

                             collisioncount++;

                             collision = false;

                         } else {
                             //removeAllElements();
                             objGameScreen.resetGame();
                         }
                     }
                 }
                 if (airplane_collision <= 1) {

                     /*try {*/
                         add_AirplaneCollided(obsXpos, obsYpos, i);
                    /* } catch (Exception e) {
                         System.out.println(" Exception 1 " + e);
                     }*/

                 }
             }

         } //************************Cloud collision detection**********************
         else if (obstType == 3) {
             if (((chrXpos + charImg.getWidth() - 5) >= obsXpos) && (chrXpos <= (obsXpos + obstImg.getWidth()))
                     && ((charYpos + charImg.getHeight()) >= obsYpos) && (charYpos <= (obsYpos + obstImg.getHeight()) + 20)) {

                 called_when_collided();
                 if (collision = true) {
                     if (cloud_collision == 1) {
                         if (collisioncount < 2) {
                             collisioncount++;

                             collision = false;
                         } else {
                             // removeAllElements();
                             objGameScreen.resetGame();
                         }
                     }
                 }

                 //vectorMovingCloudImg.removeElementAt(i);
                 if (cloud_collision <= 1) {

                    /* try {*/
                         add_CloudCollided(obsXpos, obsYpos, i, cloudid);
                     /*} catch (Exception e) {
                         System.out.println(" Exception 2 " + e);
                     }*/

                 }
             }

         }

         //************************Parachute collision detection********************
         if (obstType == 4) {
             if (((chrXpos + charImg.getWidth() - 20) >= obsXpos) && (chrXpos <= (obsXpos + obstImg.getWidth() - 20))
                     && ((charYpos + charImg.getHeight() - 30) >= obsYpos) && (charYpos <= (obsYpos + obstImg.getHeight()))) {

                 called_when_collided();
                 if (collision == true) {
                     if (parachute_collision == 1) {
                         if (collisioncount < 2) {
                             collisioncount++;
                             collision = false;
                         } else {
                             //removeAllElements();
                             objGameScreen.resetGame();
                         }
                     }
                 }
                 System.out.println("collided with parachute................");
                 //vectorMovingRingImg.removeElementAt(i);
                 if (parachute_collision <= 1) {
                     /*try {*/
                         add_ParachuteCollided(obsXpos, obsYpos, i);
                     /*} catch (Exception e) {
                         System.out.println(" Exception 3 " + e);
                     }*/


                 }

             }
         }

         //************************ChocoPack collision detection********************
         if (obstType == 5) {
             if (((chrXpos + charImg.getWidth() - 20) >= obsXpos) && (chrXpos <= (obsXpos + obstImg.getWidth()))
                     && ((charYpos + charImg.getHeight() - 20) >= obsYpos) && (charYpos <= (obsYpos + obstImg.getHeight() + 20))) {
                 wrappercount++;
                 called_when_collided();
                 System.out.println("collided with ChocoPack................");
                 if(objGameScreen.wrappercollided==false)
                 objGameScreen.wrappercollided=true;
                 if (chocopack_collision <= 1) {
                     
                     vectorMovingChocoPackImg.removeElementAt(i);

                 }

             }
         }

    }
    
        
    public void removeAllElements(){
        /*obsCloudVec.removeAllElements();
        obsRingVec.removeAllElements();
        obsAirplaneVec.removeAllElements();
        obsParachuteVec.removeAllElements();
        obsChocopackVec.removeAllElements();*/

        obsCloudcollidedVec.removeAllElements();
        obsRingcollidedVec.removeAllElements();
        obsAirplanecollidedVec.removeAllElements();
        obsParachutecollidedVec.removeAllElements();

        vectorMovingCloudImg.removeAllElements() ;
        vectorMovingRingImg.removeAllElements() ;
        vectorMovingAirplaneImg.removeAllElements();
        vectorMovingParachuteImg.removeAllElements();
        vectorMovingChocoPackImg.removeAllElements();

        vectorMovingCloudCollidedImg.removeAllElements();
        vectorMovingRingCollidedImg.removeAllElements();
        vectorMovingAirplaneCollidedImg.removeAllElements();
        vectorMovingParachuteCollidedImg.removeAllElements();
        
    }
    


    public int randomCloudObstacles() {

        obstacles_type_cloud = (int) (Math.abs(MyRandom.nextInt() % number_obst_type_cloud));
        obstacles_type_cloudcollided = (int) (Math.abs(MyRandom.nextInt() % number_obst_type_cloudcollided));
             
        return obstacles_type_cloud;
    }

    public void addCloudObstacles() {
        // temp_HEIGHT = GameView.temp_HEIGHT;
        // temp_WIDTH = GameView.temp_WIDTH;

        //	if(!obstTypeVec.isEmpty())
        //obstTypeVec.removeAllElements();

        switch (randomCloudObstacles()) {

            case 1:
                obstCloudSprite = new Sprite(obst_cloud_flat, temp_WIDTH + obst_cloud_flat.getWidth(), temp_HEIGHT - obst_cloud_flat.getHeight());
                obsCloudVec.addElement(obstCloudSprite);
                //obstTypeVec.addElement(2);
                break;
            case 2:
                obstCloudSprite = new Sprite(obst_cloud_medium, temp_WIDTH + obst_cloud_medium.getWidth(), temp_HEIGHT - obst_cloud_medium.getHeight());
                obsCloudVec.addElement(obstCloudSprite);
                //obstTypeVec.addElement(3);
                break;
            case 3:
                obstCloudSprite = new Sprite(obst_cloud_small, temp_WIDTH + obst_cloud_small.getWidth(), temp_HEIGHT - obst_cloud_small.getHeight());
                obsCloudVec.addElement(obstCloudSprite);
                //obstTypeVec.addElement(4);
                break;
            case 4:
                obstCloudSprite = new Sprite(obst_cloud_thinline, temp_WIDTH + obst_cloud_thinline.getWidth(), temp_HEIGHT - obst_cloud_thinline.getHeight());
                obsCloudVec.addElement(obstCloudSprite);
                //obstTypeVec.addElement(4);
                break;


            default:
                obstCloudSprite = new Sprite(obst_cloud_small, temp_WIDTH+ obst_cloud_small.getWidth(), temp_HEIGHT - obst_cloud_small.getHeight());
                obsCloudVec.addElement(obstCloudSprite);
                break;
        }

    }
    public void addCloudCollidedObstacles() {
        // temp_HEIGHT = GameView.temp_HEIGHT;
        // temp_WIDTH = GameView.temp_WIDTH;

        //	if(!obstTypeVec.isEmpty())
        //obstTypeVec.removeAllElements();

        switch (randomCloudObstacles()) {

            case 1:
                obstCloudcollidedSprite = new Sprite(cloudflat_collided, temp_WIDTH + cloudflat_collided.getWidth(), temp_HEIGHT - cloudflat_collided.getHeight());
                obsCloudVec.addElement(obstCloudcollidedSprite);
                //obstTypeVec.addElement(2);
                break;
            case 2:
                obstCloudcollidedSprite = new Sprite(cloudmed_collided, temp_WIDTH + cloudmed_collided.getWidth(), temp_HEIGHT - cloudmed_collided.getHeight());
                obsCloudVec.addElement(obstCloudcollidedSprite);
                //obstTypeVec.addElement(3);
                break;
            case 3:
                obstCloudSprite = new Sprite(cloudsmall_collided, temp_WIDTH + cloudsmall_collided.getWidth(), temp_HEIGHT - cloudsmall_collided.getHeight());
                obsCloudVec.addElement(obstCloudcollidedSprite);
                //obstTypeVec.addElement(4);
                break;
            case 4:
                obstCloudSprite = new Sprite(cloudthin_collided, temp_WIDTH + cloudthin_collided.getWidth(), temp_HEIGHT - cloudthin_collided.getHeight());
                obsCloudVec.addElement(obstCloudcollidedSprite);
                //obstTypeVec.addElement(4);
                break;


            default:
                obstCloudSprite = new Sprite(cloudsmall_collided, temp_WIDTH + cloudsmall_collided.getWidth(), temp_HEIGHT - cloudsmall_collided.getHeight());
                obsCloudVec.addElement(obstCloudcollidedSprite);
                break;
        }

    }
    

    public void addRingObstacle() {
        obstRingSprite = new Sprite(obst_ring, temp_WIDTH + obst_ring.getWidth(), temp_HEIGHT - obst_ring.getHeight());
        obsRingVec.addElement(obstRingSprite);

    }
    public void addRingCollidedObstacle() {
        obstRingcollidedSprite = new Sprite(ring_collided1, temp_WIDTH + obst_ring.getWidth(), temp_HEIGHT - obst_ring.getHeight());
        obsRingVec.addElement(obstRingSprite);

    }
    public void addAirplaneObstacle() {
        obstAirplaneSprite = new Sprite(obst_airplane, temp_WIDTH + obst_airplane.getWidth(), temp_HEIGHT - obst_airplane.getHeight());
        obsAirplaneVec.addElement(obstAirplaneSprite);
        

    }
    
    public void addAirplaneCollidedObstacle() {
        obstAirplanecollidedSprite = new Sprite(airplane_collided, temp_WIDTH + airplane_collided.getWidth(), temp_HEIGHT - airplane_collided.getHeight());
        obsAirplaneVec.addElement(obstAirplanecollidedSprite);

    }
    
    public void addParachuteObstacle(){
        obstParachuteSprite = new Sprite(obst_parachute, temp_WIDTH + obst_parachute.getWidth(), temp_HEIGHT - obst_parachute.getHeight());
        obsParachuteVec.addElement(obstParachuteSprite);
        
    }
    
    public void addParachuteCollidedObstacle() {
        obstParachutecollidedSprite = new Sprite(parachute_collided, temp_WIDTH + parachute_collided.getWidth(), temp_HEIGHT - parachute_collided.getHeight());
        obsParachuteVec.addElement(obstParachutecollidedSprite);

    }
    
    public void addChocoPackObstacle(){
        obstChocoPackSprite = new Sprite(obst_chocopack, temp_WIDTH + obst_chocopack.getWidth(), temp_HEIGHT - obst_chocopack.getHeight());
        obsChocopackVec.addElement(obstChocoPackSprite);
        
    }

    public void moveCloudObstacles() {
        for (int i = 0; i < obsCloudVec.size(); i++) {
            obstCloudMovSprite = (Sprite) obsCloudVec.elementAt(i);
            obstCloudMovSprite.move(-15, 20);
        }

        if (obsCloudVec.isEmpty()) {
            addCloudObstacles();
        }
    }
    public void moveCloudCollidedObstacles() {
        for (int i = 0; i < obsCloudVec.size(); i++) {
            obstCloudMovSprite = (Sprite) obsCloudVec.elementAt(i);
            obstCloudMovSprite.move(-15, 20);
        }
        

        if (obsCloudVec.isEmpty()) {
            addCloudCollidedObstacles();
        }
    }

    public void moveRingObstacles() {
        for (int i = 0; i < obsRingVec.size(); i++) {
            obstRingMovSprite = (Sprite) obsRingVec.elementAt(i);
            obstRingMovSprite.move(-15, 20);
        }

        if (obsRingVec.isEmpty()) {
            addRingObstacle();
        }

    }
    
    public void moveAirplaneObstacles() {
        for (int i = 0; i < obsAirplaneVec.size(); i++) {
            obstAirplaneMovSprite = (Sprite) obsAirplaneVec.elementAt(i);
            obstAirplaneMovSprite.move(-15, 20);
        }

        if (obsAirplaneVec.isEmpty()) {
            addAirplaneObstacle();
        }

    }
    
    public void moveAirplaneCollisionObstacles() {
        for (int i = 0; i < obsAirplaneVec.size(); i++) {
            obstAirplanecollidedMovSprite = (Sprite) obsAirplaneVec.elementAt(i);
            obstAirplanecollidedMovSprite.move(-15, 20);
        }

        if (obsAirplaneVec.isEmpty()) {
            addAirplaneCollidedObstacle();
        }

    }
    
    public void moveParachuteObstacles() {
        for (int i = 0; i < obsParachuteVec.size(); i++) {
            obstParachuteMovSprite = (Sprite) obsParachuteVec.elementAt(i);
            obstParachuteMovSprite.move(-15, 20);
        }

        if (obsParachuteVec.isEmpty()) {
            addParachuteObstacle();
        }

    }
    
    public void moveChocoPackObstacles() {
        for (int i = 0; i < obsChocopackVec.size(); i++) {
            obstChocoPackMovSprite = (Sprite) obsChocopackVec.elementAt(i);
            obstChocoPackMovSprite.move(-15, 20);
        }

        if (obsChocopackVec.isEmpty()) {
            addChocoPackObstacle();
        }

    }

    public void drawObstacles(Graphics canvas) {

        System.out.println("RANDOM NUMBER : " + randomCloudObstacles());
         }
    /*--------------------to generate random number----------------------*/
    private static int showRandomInteger(int aStart, int aEnd, Random aRandom) {

        int range = (int) aEnd - (int) aStart + 1;
        int fraction = (int) (Math.abs(aRandom.nextInt() % range));
        int randomNumber = (int) (fraction + aStart);
        return randomNumber;

    }

    public void addCloud(int type) {
        switch (type) {
            /*case 0:
            clouds[0] = new Sprite(obst_cloud_big);
            clouds[0].setPosition(240, 25);
            vectorMovingCloudImg.addElement(clouds[0]);
            
            break;*/
            case 0:
                cloudid=0;
                clouds[0] = new Sprite(obst_cloud_flat);
                clouds[0].setPosition(240, 25);
                vectorMovingCloudImg.addElement(clouds[0]);
                break;
            case 1:
                cloudid=1;
                clouds[1] = new Sprite(obst_cloud_medium);
                clouds[1].setPosition(240, 25);
                vectorMovingCloudImg.addElement(clouds[1]);
                break;
            case 2:
                cloudid=2;
                clouds[2] = new Sprite(obst_cloud_small);
                clouds[2].setPosition(240, 30);
                vectorMovingCloudImg.addElement(clouds[2]);
                break;
            case 3:
                cloudid=3;
                clouds[3] = new Sprite(obst_cloud_thinline);
                clouds[3].setPosition(240, 25);
                vectorMovingCloudImg.addElement(clouds[3]);
                break;
        }

        System.out.println("MyRandom......." + MyRandom);

    }
    public void add_CloudCollided(int x,int y,int i,int type) {   
        cloud_collision++;
        switch (type) {
            /*case 0:
            clouds[0] = new Sprite(obst_cloud_big);
            clouds[0].setPosition(240, 25);
            vectorMovingCloudImg.addElement(clouds[0]);
            
            break;*/
            case 0:
                
                cloudsCollided[0] = new Sprite(cloudflat_collided);
                cloudsCollided[0].setPosition(x, y);
                vectorMovingCloudImg.removeElementAt(i);
                vectorMovingCloudImg.insertElementAt(cloudsCollided[0],i);
                break;
            case 1:
                cloudid=1;
                cloudsCollided[1] = new Sprite(cloudmed_collided);
                cloudsCollided[1].setPosition(x, y);
                vectorMovingCloudImg.removeElementAt(i);
                vectorMovingCloudImg.insertElementAt(cloudsCollided[1],i);
                break;
            case 2:
                cloudid=2;
                cloudsCollided[2] = new Sprite(cloudsmall_collided);
                cloudsCollided[2].setPosition(x, y);
                vectorMovingCloudImg.removeElementAt(i);
                vectorMovingCloudImg.insertElementAt(cloudsCollided[2],i);
                break;
            case 3:
                cloudid=3;
                cloudsCollided[3] = new Sprite(cloudthin_collided);
                cloudsCollided[3].setPosition(x, y);
                vectorMovingCloudImg.removeElementAt(i);
                vectorMovingCloudImg.insertElementAt(cloudsCollided[3],i);
                break;
        }
        
        
        
        //System.out.println("airplane collided called.........2");

    }

    

    public void add_Ring() {


        ring = new Sprite(obst_ring);
        ring.setPosition(240, showRandomInteger(50, 150, MyRandom));
        vectorMovingRingImg.addElement(ring);

    }
    public void add_RingCollided1(int x,int y,int i) {
       // System.out.println("airplane collided called.........1");

        ring_collision++;
        ringCollided= new Sprite(ring_collided1);
        ringCollided.setPosition(x,y);
        vectorMovingRingImg.removeElementAt(i);
        vectorMovingRingImg.insertElementAt(ringCollided,i);
        //System.out.println("airplane collided called.........2");

    }
    public void add_RingCollided2(int x,int y,int i) {
       // System.out.println("airplane collided called.........1");

        ring_collision++;
        ringCollided= new Sprite(ring_collided2);
        ringCollided.setPosition(x+18,y);
        //vectorMovingRingImg.removeElementAt(i);
        vectorMovingRingImg.insertElementAt(ringCollided,i);
        //System.out.println("airplane collided called.........2");

    }
    
    public void add_Airplane() {


        airplane = new Sprite(obst_airplane);
        airplane.setPosition(240, showRandomInteger(50, 120, MyRandom));
        vectorMovingAirplaneImg.addElement(airplane);

    }
    
    public void add_AirplaneCollided(int x,int y,int i) {
       // System.out.println("airplane collided called.........1");

        airplane_collision++;
        airplaneCollided = new Sprite(airplane_collided);
        airplaneCollided.setPosition(x,y);
        vectorMovingAirplaneImg.removeElementAt(i);
        vectorMovingAirplaneImg.insertElementAt(airplaneCollided,i);
        //System.out.println("airplane collided called.........2");

    }
    
    public void add_Parachute() {


        Parachute = new Sprite(obst_parachute);
        Parachute.setPosition(350, showRandomInteger(200, 320, MyRandom));
        vectorMovingParachuteImg.addElement(Parachute);

    }
    
    public void add_ParachuteCollided(int x,int y,int i) {
       // System.out.println("airplane collided called.........1");

        parachute_collision++;
        ParachuteCollided= new Sprite(parachute_collided);
        ParachuteCollided.setPosition(x,y);
        vectorMovingParachuteImg.removeElementAt(i);
        vectorMovingParachuteImg.insertElementAt(ParachuteCollided,i);
        //System.out.println("airplane collided called.........2");

    }
    
    public void add_ChocoPack() {


        Chocopack = new Sprite(obst_chocopack);
        Chocopack.setPosition(1700, showRandomInteger(50, 120, MyRandom));
        vectorMovingChocoPackImg.addElement(Chocopack);

    }
    
    public void add_ChocopackCollided(int x,int y,int i) {
       // System.out.println("airplane collided called.........1");

        chocopack_collision++;
        Chocopack.setPosition(x, y);
        
        vectorMovingChocoPackImg.removeElementAt(i);
        
        
        //System.out.println("airplane collided called.........2");

    }

    public void move_clouds() {
        // System.out.println(" vectorMvngImg.size() " + vectorMovingCloudImg.size());
        for (int i = 0; i < vectorMovingCloudImg.size(); i++) {
            Sprite HitTypeSP1 = (Sprite) vectorMovingCloudImg.elementAt(i);
            HitTypeSP1.move(-3, 0);
            if (HitTypeSP1.getX() < -(HitTypeSP1.getWidth() + 10)) {
                
                vectorMovingCloudImg.removeElementAt(i);
                // addCloud(randomCloudObstacles());
                cloud_collision=0;
                
                    //collision=true;
            
        }
        if (vectorMovingCloudImg.size() < 1) {
            addCloud(randomCloudObstacles());
        }
    }
    }

    public void move_ring() {
        for (int i = 0; i < vectorMovingRingImg.size(); i++) {
            Sprite HitTypeSP1 = (Sprite) vectorMovingRingImg.elementAt(i);
            HitTypeSP1.move(-7, 0);
            if (HitTypeSP1.getX()+1000 < -(HitTypeSP1.getWidth() + 10)) {
                vectorMovingRingImg.removeElementAt(i);
                ring_collision=0;
                collision=true;
            }

        }

        if (vectorMovingRingImg.size() < 1) {
            add_Ring();
        }

    }
    
    public void move_Airplane() {
        for (int i = 0; i < vectorMovingAirplaneImg.size(); i++) {
            Sprite HitTypeSP1 = (Sprite) vectorMovingAirplaneImg.elementAt(i);
            HitTypeSP1.move(-18,0);//(-18,0)
            if (HitTypeSP1.getX()+1000 < -(HitTypeSP1.getWidth() )) {
                vectorMovingAirplaneImg.removeElementAt(i);
                airplane_collision=0;
                
                    //collision=true;
            }

        }

        if (vectorMovingAirplaneImg.size() < 1) {
            add_Airplane();
        }

    }
    
    public void move_parachute() {
        for (int i = 0; i < vectorMovingParachuteImg.size(); i++) {
            Sprite HitTypeSP1 = (Sprite) vectorMovingParachuteImg.elementAt(i);
            HitTypeSP1.move(-11, -showRandomInteger(1, 9, MyRandom)); //(-11, -showRandomInteger(1, 9, MyRandom))
            if (HitTypeSP1.getX()+1400 < -(HitTypeSP1.getWidth() )) {
                vectorMovingParachuteImg.removeElementAt(i);
                parachute_collision=0;
                
                    //collision=true;
            }

        }

        if (vectorMovingParachuteImg.size() < 1) {
            add_Parachute();
        }

    }

    public void move_ChocoPack() {
        for (int i = 0; i < vectorMovingChocoPackImg.size(); i++) {
            Sprite HitTypeSP1 = (Sprite) vectorMovingChocoPackImg.elementAt(i);
            HitTypeSP1.move(-7, 0);
            if (HitTypeSP1.getX()+1400 < -(HitTypeSP1.getWidth() )) {
                vectorMovingChocoPackImg.removeElementAt(i);
                chocopack_collision=0;
                collision=true;
            }

        }

        if (vectorMovingChocoPackImg.size() <1) {
           
            add_ChocoPack();
        }

    }
    
    public void draw_cloud(Graphics g) {

        for (int i = 0; i < vectorMovingCloudImg.size(); i++) {
            Sprite HitTypeSP2 = (Sprite) vectorMovingCloudImg.elementAt(i);
            HitTypeSP2.paint(g);
            collision_with_obstacles(objGameScreen.imgBall[0], objGameScreen.cannonball.cannonballX, objGameScreen.cannonball.cannonballY, HitTypeSP2,  HitTypeSP2.getX(), HitTypeSP2.getY(),3,i);

        }


    }

    public void draw_ring(Graphics g) {
        for (int i = 0; i < vectorMovingRingImg.size(); i++) {
            Sprite HitTypeSP2 = (Sprite) vectorMovingRingImg.elementAt(i);
            HitTypeSP2.paint(g);
            collision_with_obstacles(objGameScreen.imgBall[0], objGameScreen.cannonball.cannonballX, objGameScreen.cannonball.cannonballY, HitTypeSP2,  HitTypeSP2.getX(), HitTypeSP2.getY(),1,i); 

        }
        
        }
    
    
    public void draw_Airplane(Graphics g) {
        for (int i = 0; i < vectorMovingAirplaneImg.size(); i++) {
            Sprite HitTypeSP2 = (Sprite) vectorMovingAirplaneImg.elementAt(i);
            HitTypeSP2.paint(g);
            collision_with_obstacles(objGameScreen.imgBall[0], objGameScreen.cannonball.cannonballX, objGameScreen.cannonball.cannonballY, HitTypeSP2,  HitTypeSP2.getX(), HitTypeSP2.getY(),2,i);

        }
    }
    
    public void draw_Parachute(Graphics g) {
        for (int i = 0; i < vectorMovingParachuteImg.size(); i++) {
            Sprite HitTypeSP2 = (Sprite) vectorMovingParachuteImg.elementAt(i);
            HitTypeSP2.paint(g);
            collision_with_obstacles(objGameScreen.imgBall[0], objGameScreen.cannonball.cannonballX, objGameScreen.cannonball.cannonballY, HitTypeSP2,  HitTypeSP2.getX(), HitTypeSP2.getY(),4,i);

        }
    }
    
    public void draw_ChocoPack(Graphics g) {
        for (int i = 0; i < vectorMovingChocoPackImg.size(); i++) {
            Sprite HitTypeSP2 = (Sprite) vectorMovingChocoPackImg.elementAt(i);
            HitTypeSP2.paint(g);
            collision_with_obstacles(objGameScreen.imgBall[0], objGameScreen.cannonball.cannonballX, objGameScreen.cannonball.cannonballY, HitTypeSP2,  HitTypeSP2.getX(), HitTypeSP2.getY(),5,i);

        }
    }
    

    public void called_when_collided() {
        
        
        
        
        
    }
}

[jon.kiparsky]

When you removeAllElements from a vector, it sets the vector's size to zero. That means attempting to add at any location other than zero will fail, and attempting to remove from any specified location will also fail.

See the Vector API

This post has been edited by jon.kiparsky: 09 July 2012 - 07:55 AM

[kuldip.kadam]

jon.kiparsky could u please provide me with a solution to the problem?

Thanks

[Luckless]

kuldip.kadam, no we cannot--it is against D.I.C. policy

[jon.kiparsky]

Too much code there for me to go through it looking for a specific solution, but you need to guard against making a specific reference to an element which isn't there.
One way to do that would be to use the isEmpty method of Vector before you refer to a non-zero index. Another way would be to check that the index where you want to add is less than or equal to the length of the Vector. Another way to think about it would be to ensure that awareness of the current length of your vector is built into the calculation of the index where you want to add.

Overall, it sounds like you don't have control of your state. If you've cleared the vector, that suggests to me that you've put yourself in a particular state, from which you should not be looking at objects in the vector by their index - there's nothing to look at. You should know at that point that there's nothing there.

So that's two sorts of solution. One would be to constantly verify that this action is permitted before you take it. Another would be to try to design some awareness into the program, so that you never take an unsafe action.

As I say, I don't have time to review your code, so I can't tell you how to do that in your particular case, but maybe it helps.

[pbl]

at java.util.Vector.removeElementAt (Vector.java: 510)

obviously you are trying to remove an element in a Vector that does not have that element
so remove(0) on a empty Vector or more general remove(N) on a Vector that has N-1 elements or less