Ball not moving

[Eleeist]

Hello,

My goal is to make the black ball move in the window when I press arrow keys. But it does not, it stays in one place no matter what key I press.

Here is the code that I have so far:

package javagame;

import javax.swing.JFrame;
import java.awt.Graphics;
import java.awt.event.KeyAdapter;

public class JavaGame extends JFrame {
    
    int x, y;
    
    public class AL extends KeyAdapter {
        
        public void keyPressed(KeyEvent e) {
            
            int keyCode = e.getKeyCode();
            
            if (keyCode == e.VK_LEFT) {
                
                x--;
                
            }
            
            if (keyCode == e.VK_RIGHT) {
                
                x++;
                
            }
            
            if (keyCode == e.VK_UP) {
                
                y--;
                
            }
                        
            if (keyCode == e.VK_DOWN) {
                
                y++;
                
            }
            
        }
        
        public void keyReleased(KeyEvent e) {
            
        }
        
    }
    
    public JavaGame() {
    
        addKeyListener(new AL());
        
        setTitle("My First Java Game");
        setSize(500, 500);
        setResizable(false);
        setVisible(true);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        x = 150;
        y = 150;
    
    }
    
    public void paint(Graphics g) {
        
        g.fillOval(x, y, 15, 15);
        
        repaint();
        
    } 
    
    public static void main(String[] args) {
        
        JavaGame theGame = new JavaGame();
        
    }
     
}

[quad64bit]

Works for me. You also forgot an import statement - import java.awt.event.KeyEvent;

[quad64bit]

P.S. Putting repaint() in the paint method is pretty weird - that'll cause infinite repainting won't it?

Move that statement to the end of the keyPressed() method, so the screen repaints when the user hits a key!

[Eleeist]

The ball is definitely not moving for me. Any ideas what that could be?

PS: I have applied the corrections that you suggested. Thanks!

[Tolls]

Add a System.out.println() to print out the keycode you get in the keyPressed event, just to check you are getting what you think.

Have you moved the repaint()?

[quad64bit]

Ball moves for me, and it leaves a painted 'trail' behind it (snake style) which it should (with the way you coded the logic). It could be possible it doesn't recognize your key presses? Put a System.out.println(e) in the keyPressed event method and verify that not only does it see the key press, but it is the correct key!

[Eleeist]

That is really strange. I switched to Eclipse from NetBeans and got it to work, but now I tried it again and no luck :(. I don't know what's happening. I added the println statements to print the keyCode. My keyCodes are:

Left: 37
Up: 38
Right: 39
Down: 40

Is that correct?

[quad64bit]

Sounds about right. What happens when you run it outside the IDE, as in from the command line?