hi guys, i have experimented with action listner and produced the following programme. However, i have this problem.

Firstly enter 2 items
item number: 1
item description : test
item price : 1
item quantity :2
click add

add another:
item number:2
item description: test2
item price:2
item quantity:2
click add

now click amend item, then search item number: 2
click amend. A popup will display amend item successful.
click search again, and enter item number 1
click amend. A pupup will display amend item sucessful. but displays it 2 times... which means the operations inside my annonymous action listner is repeated 2 times... why is that so? i only click the amend item button 1 time.
Can anyone help me please? I thank you greatly in advance.

it seems that the code is too long to be posted inside a code block.
here is the url to download the code
BookstoreInventory.java

This post has been edited by shangyi: 4 Jul, 2009 - 02:02 AM

Here is the code - i have not had a look yet, will after dinner

import java.util.Scanner;
import java.io.IOException;
class Item{
	private int itemNumber;
	private String itemDescription;
	private double sellingPrice;
	private int quantity;

	Item(){
	}
	Item(int number, String description, double price, int quant){
		itemNumber = number;
		itemDescription = description;
		sellingPrice = price;
		quantity = quant;
	
	}
	public boolean equals(Item newItem){
		boolean checkItemNumber = false;
		boolean checkDescription = false;
		if(itemNumber==newItem.itemNumber)
			checkItemNumber= true;
			
		if(itemDescription == newItem.itemDescription)
			checkDescription = true;
	
		if(checkItemNumber || checkDescription)
			return true;
		else
			return false;
	}
	
	public int getItemNumber(){
		return itemNumber;
	}
	public String getItemDescription(){
		return itemDescription;
	}
	public double getSellingPrice(){
		return sellingPrice;
	}
	public int getQuantity(){
		return quantity;
	}
	public void setItemNumber(int number){
		itemNumber = number;
	}
	public void setItemDescription(String text){
		itemDescription = text;
	}
	public void setSellingPrice(double price){
		sellingPrice = price;
	}
	public void setQuantity(int numbers){
		quantity =numbers;
	}


}

public class BookstoreInventory {
	private int lastRecord;
	public static Item[] itemsArray = new Item[100];
    public static BookstoreInventory bookstore1 = new BookstoreInventory();
	
	BookstoreInventory(){
		lastRecord= 0;
	}

	public void setLastRecord(int lastIndex){
		lastRecord = lastIndex;
	}
	public int getLastRecord(){
		return lastRecord;
	}
	
    public static int menu(){
    	Scanner scanner = new Scanner(System.in);
    	
    	System.out.println("1. Add new item");
    	System.out.println("2. Amend the details of an item");
    	System.out.println("3. Searcg for an item");
    	System.out.println("4. Enter a sales transaction");
    	System.out.println("5. Input stock recieved");
    	System.out.println("6. List details of all items.");
    	System.out.println("7. Exit Programe.");
    
    	System.out.print("Enter your choice: ");
    	int choice = scanner.nextInt();
    	return choice;
    }
    public static Item[] addNewItem(){
    

    ;
    	boolean repeat = false;
    	
    	Scanner scanner = new Scanner(System.in);
    	Scanner textScanner = new Scanner(System.in);
    	
    	//first time execution is zero
    	for(int i =bookstore1.getLastRecord();i<itemsArray.length;i++){
    	repeat = false;
    	bookstore1.setLastRecord(i);	
    	
    		if(i==0){System.out.print(bookstore1.getLastRecord());
    			System.out.print("Enter Item Number: ");
    			int itemNumber = scanner.nextInt();
    			
    			System.out.print("Enter Details of the item: ");
    			String description = textScanner.nextLine();
    			
    			System.out.print("Enter Selling Price: RM ");
    			double price = scanner.nextDouble();
    			
    			System.out.print("Quantity on hand: ");
    			int quantity = scanner.nextInt();
    			
    			itemsArray[i] = new Item(itemNumber, description, price, quantity);
    			
    		}
    		else{
    			bookstore1.setLastRecord(i);
    			do{
    				repeat = false;
    				System.out.print(bookstore1.getLastRecord());
    				System.out.print("Enter Item Number: ");
    				int itemNumber = scanner.nextInt();
    			
    				System.out.print("Enter Details of the item: ");
    				String description = textScanner.nextLine();
    			
    				System.out.print("Enter Selling Price: RM ");
    				double price = scanner.nextDouble();
    			
    				System.out.print("Quantity on hand: ");
    				int quantity = scanner.nextInt();
    			
    				Item temporaryArray = new Item(itemNumber, description, price, quantity);
    			
    				for(int j=0; j<i;j++){
    					if(temporaryArray.equals(itemsArray[j]))
    						repeat = true;
    				}
    				if(repeat)
    					System.out.println("ERROR: This item is already added.");
    				else{
    					repeat= false;
    					itemsArray[i] = temporaryArray;
    				}
    			}while(repeat);
    		}
    	
    	
    	System.out.print("\n Do you want to continue adding more records? (y/n)");
    	String answer = scanner.next().toUpperCase();
    	
    	char realAnswer = answer.charAt(0);
    	if(realAnswer == 'N'){
    		bookstore1.setLastRecord(i+1);
    		break;
    	}
    	}
    return itemsArray;
    }
    public static void displayItems(Item[] filledArray){
	
    	for(Item displayItem : filledArray){
    		try{
    		
   				System.out.println("Item Number :"+displayItem.getItemNumber());
    			System.out.println("Item Description :"+displayItem.getItemDescription());
    			System.out.printf("Item Selling Price: RM %.2f\n", displayItem.getSellingPrice());
    			System.out.println("Item Quantity: "+displayItem.getQuantity());
    		}
    		catch(NullPointerException e){
    			System.out.print("Press any key to continue:");	
    			try{
					System.in.read();
				}catch(IOException ex){}
				
				break;
    		}

   			
    	}
    }
    public static void amendItems(Item[] filledArray){
    	Scanner scanner = new Scanner(System.in);
    	Scanner textScanner = new Scanner(System.in);
    	System.out.print("Enter Item number to begin search: ");
    	int itemNumber = scanner.nextInt();
    	int foundIndex=0;
    	int option;
    	boolean invalid= false;
    	boolean changeOtherValues=false;
    	
    	for(int i=0;i<filledArray.length;i++){
    		if(itemNumber == filledArray[i].getItemNumber()){
    			foundIndex = i;
    			break;
    		}
    		else
    			foundIndex = -1;
    		
    	}
    	System.out.println("Item Number :"+filledArray[foundIndex].getItemNumber());
    	System.out.println("Item Description :"+filledArray[foundIndex].getItemDescription()+ "                1. change item description");
    	System.out.printf("Item Selling Price: RM %.2f        2. change selling price\n", filledArray[foundIndex].getSellingPrice());
    	System.out.println("Item Quantity: "+filledArray[foundIndex].getQuantity()+"                   3. change item quantity");
    	do{
    	
    		System.out.print("\nEnter the number to change the fields: ");
    		option = scanner.nextInt();
    		if(option ==1){
    			System.out.print("Item Description : ");
    			String description = textScanner.nextLine();
    			itemsArray[foundIndex].setItemDescription(description);
    		}
    		else if(option ==2){
    			System.out.print("Item Price: ");
    			double price = scanner.nextDouble();
    			itemsArray[foundIndex].setSellingPrice(price);
    		}
    		else if(option ==3){
    			System.out.print("Item Quantity: ");
    			int quantity = scanner.nextInt();
    			itemsArray[foundIndex].setQuantity(quantity);
    		}
    		else{
    			invalid = true;
    			System.out.println("Enter only 1 or 2 or 3.");
    		}
    		System.out.printf("Do you want to change other fields of Item Number:%d? (y/n)", itemsArray[foundIndex].getItemNumber());
    		String answer = scanner.next().toUpperCase();
    	
    		char realAnswer = answer.charAt(0);
    		if(realAnswer == 'Y')
    			changeOtherValues = true;
    		else
    			break;
    	}while(invalid || changeOtherValues);
    	
    }
    
    public static void main (String[] args) {
    	Item[] items = new Item[100];
    	int choice = menu();
    	while(choice != 7){
    	
    		if(choice == 1)
    		items	= addNewItem();
    		else if(choice ==2)
    			amendItems(items);    				        	    	
    		else if(choice ==6)
    			displayItems(items);
    		
    		choice = menu();
    	}

    }
    
    
}

OH crap! gave you the wrong file! please re download new file >< sorry for the inconvenience caused.

http://maplefrenzy.x10hosting.com/dco/Book...eInventory.java

Sorry again

90% positive it's because you put the bamendItem actionListener inside the bSearchItem actionListener

Hope that helps!

thanks, i will go check it out =)

wow it works! thumbs up for you!