Thread: Need Some Help...

When I run this code nothing happens and all I want it to do is make the rectangle move across the screen.

package game;
 
import javax.swing.*;
 
public class Game {
 
	public static void main(String[] args) {
		new Game();
	}
 
	public Game() {
		JFrame f = new JFrame("My Graphics");
		Panel p = new Panel();
 
		f.setSize(800, 600);
		f.setLocationRelativeTo(null);
		f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		f.add(p);
		f.setVisible(true);
	}
 
}
 
package game;
 
import java.awt.*;
import javax.swing.*;
 
public class Panel extends JPanel {
 
	private int txtx, txty;
	private int rectx, recty;
	private int ovalx, ovaly;
	private boolean running;
 
	public Panel() {
		txtx = 50;
		txty = 50;
 
		rectx = 50;
		recty = 80;
 
		ovalx = 50;
		ovaly = 210;
 
		running = true;
 
		setBackground(Color.WHITE);
		setForeground(Color.BLACK);
		setFont(new Font("Ariel", Font.PLAIN, 20));
 
		gameloop();
	}
 
	public void paintComponent(Graphics g) {
		super.paintComponent(g);
		Graphics2D g2 = (Graphics2D) g;
 
		g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
				RenderingHints.VALUE_ANTIALIAS_ON);
 
		g2.drawString("diz iz mah texz", txtx, txty);
		g2.setColor(Color.RED);
		g2.fillRect(rectx, recty, 100, 100);
		g2.setColor(Color.BLUE);
		g2.fillOval(ovalx, ovaly, 100, 100);
	}
 
	public void gameloop() {
		while (running) {
			rectx++;
			repaint();
 
			try {
				Thread.sleep(20);
			} catch (Exception e) {
 
			}
		}
	}
 
}

Well, that's all there is. When I run it nothing happens.

Add lots of println statements to the code in all of the methods to see where the execution flow goes.
You need to see where the code is executing and where it is not executing.

Alright, I'll try that.

Well, I checked and it goes into the game loop, but for some reason my window doesn't appear.

it goes into the game loop

Does it come out of the gameloop method?
If it never exits the gameloop method, then it never returns from the Panel class's constructor and it nevers finishes the Game class's constructor.

Okay, any suggestions on how to end the loop?

Don't enter an infinite loop until the initialization is finished.
Better to Create a Thread and do the infinite loop there.

K, thanks.