Bei repaint nix los

[javampir]

Hallo zusammen,
ich muss euch mal wieder mit einer idiotisch einfachen Frage nerven:
Warum funktioniert mein repaint nicht?
Main class: BoxGame.java

import javax.swing.JFrame;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JOptionPane;
import java.awt.event.WindowListener;
import java.awt.event.WindowEvent;
import java.awt.event.KeyListener;
import java.awt.event.KeyEvent;
import javax.swing.JLabel;

public class BoxGame extends JFrame implements Runnable {
    private final long serialVersionUID = 1L;
    
    public static void main(String[] args) {
        new BoxGame();
    }
    
    Thread th;
    boolean up, down, right, left;
    PaintPanel pp = new PaintPanel();
    byte letter;
    
    public BoxGame() {
        super("BoxGame");
        add(pp, "Center");
        JLabel l = new JLabel("Label");
        addWindowListener(new WindowListener() {
            public void windowActivated(WindowEvent e) {}
            public void windowClosed(WindowEvent e) {}
            public void windowClosing(WindowEvent e) {
                th.stop();
            }
            public void windowDeactivated(WindowEvent e) {}
            public void windowDeiconified(WindowEvent e) {}
            public void windowIconified(WindowEvent e) {}
            public void windowOpened(WindowEvent e) {}
        });
        addKeyListener(new KeyListener() {
            public void keyTyped(KeyEvent e) {}
            public void keyReleased(KeyEvent e) {
                JOptionPane.showMessageDialog(null, "Re", "Re", JOptionPane.INFORMATION_MESSAGE);
                if(e.getKeyCode() == KeyEvent.VK_W) {
                    up = false;
                } else if(e.getKeyCode() == KeyEvent.VK_S) {
                    down = false;
                } else if(e.getKeyCode() == KeyEvent.VK_A) {
                    left = false;
                } else if(e.getKeyCode() == KeyEvent.VK_D) {
                    right = false;
                }
            }
            public void keyPressed(KeyEvent e) {
                System.out.println("key");
                if(e.getKeyCode() == KeyEvent.VK_W) {
                    up = true;
                } else if(e.getKeyCode() == KeyEvent.VK_S) {
                    down = true;
                } else if(e.getKeyCode() == KeyEvent.VK_A) {
                    left = true;
                } else if(e.getKeyCode() == KeyEvent.VK_D) {
                    right = true;
                }
            }
        });
        up = false;
        down = false;
        left = false;
        right = false;
        th = new Thread(this);
        th.start();
        setExtendedState(JFrame.MAXIMIZED_BOTH);
        setVisible(true);
    }
    
    @Override
    public void run() {
        boolean started = true;
        while(started) {
            checkKeys();
            pp.repaint();
            try {
                Thread.sleep(100);
            } catch (Exception ex) {}
        }
    }
    
    private void checkKeys() {
        if(up) {
            pp.setLetter((byte) 1);
        } else if(left) {
            pp.setLetter((byte) 2);
        } else if(down) {
            pp.setLetter((byte) 3);
        } else if(right) {
            pp.setLetter((byte) 4);
        } else if(!up) {
            pp.setLetter((byte) 0);
        } else if(!left) {
            pp.setLetter((byte) 0);
        } else if(!down) {
            pp.setLetter((byte) 0);
        } else if(!right) {
            pp.setLetter((byte) 0);
        }
    }
}

Klasse PaintPanel.java:

import javax.swing.JPanel;
import java.awt.Graphics;
import java.awt.Color;
import javax.swing.JLabel;
import java.awt.Toolkit;

public class PaintPanel extends JPanel {

    byte letter = 0;

    public PaintPanel() {
        super();
        setBackground(Color.red);
    }
    
    @Override
    public void paintComponent(Graphics g) {
        switch(letter) {
            case 1: {
                g.drawString("W", 20, 20);
            } break;
            case 2: {
                g.drawString("A", 20, 20);
            } break;
            case 3: {
                g.drawString("S", 20, 20);
            } break;
            case 4: {
                g.drawString("D", 20, 20);
            } break;
            case 0: {
            }
            default: {}
        }
    }
    
    public void setLetter(byte b) {
        letter = b;
    }
}

ich hoffe mal, dass sich eine schnelle Lösung findet.
javampir

 

[xehpuk]

Ergänze deinen Code mal um diese Zeile:
[JAVA=16]@Override
public void paintComponent(Graphics g) {
super.paintComponent(g);
// restlicher Code
}[/code]

 

[javampir]

Hallo,
danke, das wars. Hab diese Zeile nur mal wieder verschusselt, hab ich auch schon woanders verwendet. Jetzt funktionierts einwandfrei.
javampir