Help with KeyAdapter

Game Play & Game Design
#1

Hi, im trying to recreat pong for my summative progect at school and i need a little help
Im using a KeyAdapter to get the KeyEvent from the user and to move the paddle corespondingly, but it not registering and im really confused
help would be much appreciated,

/**
 * 
 */
package ShahabGame;

import javax.swing.*;
import java.awt.event.*;

public class ShahabPongGame extends JFrame
{
	Ball ball = new Ball(20,20);
	
	public static void main(String[] args)
	{
		new ShahabPongGame();
	}
	ShahabPongGame()
	{
		add(ball);
		setSize(400, 400);
		setVisible(true);
		addKeyListener(new KeyAdapter(){
			public void keyPressed (KeyEvent e)
			{
				System.out.println(e.getKeyCode());
				if(e.getKeyCode() == 38)
				{
					//up
					ball.updatePaddel(38);
					System.out.println("Up");
				}
				if(e.getKeyCode() == 39)
				{
					//right
					ball.updatePaddel(39);
				}
				if(e.getKeyCode() == 40)
				{
					//down
					ball.updatePaddel(40);
				}
				if(e.getKeyCode() == 37)
				{
					//left
					ball.updatePaddel(37);
				}
			}
		}
		);
	}

	
	

}

Thanks

#2

you might have to add your key listener to the contentpane

jframe.getContentPane().addKeyListener

#3

unfortunately that didn’t work but thanks for the suggestion
i tried to use and inner class or a key adapter but those don’t seem to work either

public class ShahabPongGame extends JFrame
{
	Ball ball = new Ball(20,20);
	
	
	
	public static void main(String[] args)
	{
		new ShahabPongGame();
	}
	public ShahabPongGame()
	{
		MyListener listener = new MyListener();
		add(ball);
		setSize(400, 400);
		setVisible(true);
		addKeyListener(new MyListener());
		setFocusable(true);
		/*addKeyListener(new KeyAdapter(){
			public void keyPressed(KeyEvent e)
			{
				System.out.println(e.getKeyCode());
				int i = e.getKeyCode();
				switch(i)
				{
					case 37:
						System.out.println("Left");
						//ball.updatePaddel(37);
						break;
					case 38:
						ball.updatePaddel(38);
						break;
					case 39:
						ball.updatePaddel(39);
						break;
					case 40:
						ball.updatePaddel(40);
						break;
				}
		}
		});*/
	}
	private class MyListener extends KeyAdapter
	{
		public void keyPressed(KeyEvent e)
		{
			System.out.println("Okay");
		}
	}
#4

try a requestFocus() after adding the listener

#5

is that you whole code ? or is there something in your frame ?

=> what I mean is maybe something you added in front catch key events

#6

have you tried implementing keylistener?

#7

Dzzd ya it’s my whoole code the add(ball) referes to another class with a paint method

h3ckboy i’ve tried implementing a KeyListener but im will try again just to make sure that for the suggestion

cylab i tried adding that in but it didin’t work

#8

It worked fine for me, all I did was remove your commented out code(and calls to ball).

import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;

import javax.swing.JFrame;

public class ShahabPongGame extends JFrame
{
	//Ball ball = new Ball(20,20);
	
	
	
	public static void main(String[] args)
	{
		new ShahabPongGame();
	}
	public ShahabPongGame()
	{
		MyListener listener = new MyListener();
		//add(ball);
		setSize(400, 400);
		setVisible(true);
		addKeyListener(new MyListener());
		setFocusable(true);
		
	}
	private class MyListener extends KeyAdapter
	{
		public void keyPressed(KeyEvent e)
		{
			System.out.println("Okay");
		}
	}
}
#9

ya but the problem is when i start create my ball then put it in the frame
Then it stopd working, it stop printing okay and just does nothing other than show the art

#10

Can you post the Ball code?