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Not looping

Started by Crusable77 Jan 8, 2013 at 9:40 PM 2 replies 1.3k views

Original Post

Crusable77

Jan 8, 2013 at 9:40 PM

I am at school and i am just messing around and this loop will not loop:

import java.util.Random;

import java.awt.*;

import javax.swing.JApplet;

public class Matrix extends JApplet{

public void paint(Graphics g){

Random rand = new Random();

int width = getWidth();

int height = getHeight();

int num ;

int posX;

int posY;

g.setColor(Color.black);

g.fillRect(0,0,width,height);

g.setColor(Color.GREEN);

String matrix[] = {"a", "b", "c", "d","e","f","g","h","i","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z","0","1","2","3","4","5","6","7","8","9"};

for(;;){

num = rand.nextInt(36);

posX = rand.nextInt(width);

posY = rand.nextInt(height);

g.drawString(matrix[num], posX, posY);

}

BCullis

Jan 8, 2013 at 9:54 PM

Are you sure?

Try adding a printout to System.Out that prints the string you're trying to draw. I'm willing to bet it's looping like mad, so much in fact that you never complete the paint method because you're stuck in the loop ;)

FalconDragoon

Jan 8, 2013 at 10:41 PM

I'm not versed in Java awt much, but I do believe you're supposed to call g.setFont before you can draw text.

Without seeing the context in which the paint method is called, it's hard to guess at what's going on. That for loop, however should run forever.

minibutmany

Jan 9, 2013 at 12:32 AM

You should never put your game loop inside of your paint method, because it will never repaint the screen.

Make another method that calls the paint method ever time that loop loops using "repaint()".

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