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using Scanner class

 
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using Scanner class
jojo515
19 Feb, 2008 - 01:33 AM
Post #1

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Joined: 14 Feb, 2008
Posts: 9
I have a problem with this code. When i run it...the program just stops at the last drawBox. The cursor stays there and it doesn't prompt me to "press any key to continue..."
how do i fix this? i have more parts to my program but it won't run after the last method in this excerpt of my code is executed.

CODE

// draw four boxes
        drawBox();
        System.out.print("Enter height: ");
        int height1 = keyboard.nextInt();
        System.out.println();
        System.out.print("Enter width: ");
        int width1 = keyboard.nextInt();
        System.out.println();
        drawBox(height1,width1);
        System.out.print("Enter height: ");
        int height2 = keyboard.nextInt();
        System.out.println();
        System.out.print("Enter width: ");
        int width2 = keyboard.nextInt();
        drawBox(height2,width2, '+');
        System.out.print("Enter height: ");
        int height3 = keyboard.nextInt();
        System.out.println();
        System.out.print("Enter width: ");
        int width3 = keyboard.nextInt();
        System.out.println();
        drawBox(height3,width3, '#');


This post has been edited by jojo515: 19 Feb, 2008 - 01:37 AM
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Nayana
RE: Using Scanner Class
19 Feb, 2008 - 01:37 AM
Post #2

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Could we have the code of the drawBox functions. The problem is probably inside that, and we can't help you if we can't see it.

Thanks.
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jojo515
RE: Using Scanner Class
19 Feb, 2008 - 01:43 AM
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here are the different drawBox methods codes...

CODE

    //
    // drawBox method version 1
    //
    public static void drawBox() {
        for (int line = 1; line <= 4; line++) {
            System.out.print("*");
        }
        System.out.println();

        for (int line = 1; line <= 4-2; line++) {
            System.out.print("*");
            for (int i = 1; i <= 2; i++) {
                System.out.print(" ");
            }
            System.out.println("*");
        }

        for (int line = 1; line <= 4; line++) {
            System.out.print("*");
        }
        System.out.println();
    }

    //
    // drawBox method version 2
    //
    public static void drawBox(int height, int width) {

        for (int line = 1; line <= width; line++) {
            System.out.print("*");
        }
        System.out.println();

        for (int i = 1; i <= height - 2; i++) {
            System.out.print("*");
            for (int j = 1; j <= width-2; j++) {
                System.out.print(" ");
            }
            System.out.println("*");

        }

        for (int line = 1; line <= width; line++) {
                    System.out.print("*");
        }
        System.out.println();
    }

    //
    //drawBox method version 3
    //
    public static void drawBox(int  height, int width, char symbol) {
        for (int line = 1; line <= width; line++) {
                System.out.print(symbol);
            }
            System.out.println();

            for (int line = 1; line <= height-2; line++) {
                System.out.print(symbol);
                for (int i = 1; i <= width-2; i++) {
                    System.out.print(" ");
                }
                System.out.println(symbol);
            }

            for (int line = 1; line <= width; line++) {
                System.out.print(symbol);
            }
            System.out.println();


another thing...
how do i have the user input a symbol instead of assigning it in my program? ...it's for the 3rd and 4th drawBox method calls
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jojo515
RE: Using Scanner Class
19 Feb, 2008 - 01:49 AM
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ok nevermind... i figured out how to do it

Thanks.
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Nayana
RE: Using Scanner Class
19 Feb, 2008 - 01:50 AM
Post #5

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You didn't paste the entire code for the 3rd drawBox function. This is the one that I think is causing the problem.

To answer your second question, you can use a scanner like this:
CODE

char symbol;
Scanner scan = new Scanner(system.in);

symbol = scan.next().charAt(0);


The above code creates a scanner, gets a string, and gets the char at the start of the string. So if the user entered "#alsdfj" then symbol would become '#'.
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