Wenn ich den Code ausführe, sollte die hinzugefügte Example1-Klasse im JOptionPane (in Frame) keyInput erhalten und dann den y-Wert der Player-Instanz (in Example1) ändern, dies funktioniert jedoch nicht. Wie könnte ich das Schiff um seine Achse drehen und dann in die Richtung bewegen, in die es weist? Derzeit bewegt es sich in die Richtung, in die es gedreht wird, aber es dreht sich auf den scheinbaren Koordinaten 0,0.

Rahme

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

/**
* Created by griffin on 12/7/2015.
*/
public class Frame extends JFrame {
    public Frame() {
        initUI();
}

private void initUI() {
    JTabbedPane jtp = new JTabbedPane();
    Example1 e1 = new Example1();
    Example2 e2 = new Example2();
    getContentPane().add(jtp);
    jtp.add(e1);
    jtp.add(e2);
    jtp.addTab("Example 1", e1);
    jtp.addTab("Example 2", e2);
    setResizable(false);
    pack();
    setTitle("NLTP");
    setLocationRelativeTo(null);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}

public static void main(String[] args) {
    EventQueue.invokeLater(new Runnable() {
        @Override
        public void run() {
            JFrame frame =  new Frame();
            frame.setVisible(true);
        }
    });
}
}

Beispiel

import javax.swing.*;
import java.awt.*;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.geom.AffineTransform;

/**
* Created by griffin on 12/7/2015.
*/
public class Example1 extends JPanel implements Runnable {

private final int B_WIDTH = 640;
private final int B_HEIGHT = 480;
private int DELAY = 25;
private Thread thread;

Ship player = new Ship(320, 240);

public Example1() {
    initScreen();
}

private void initScreen() {
    JButton explanation = new JButton("Explanation");
    explanation.setBounds(0, 0, 150, 30);
    this.setLayout(null);
    add(explanation);

    addKeyListener(new keyInput());
    setFocusable(true);

    setBackground(Color.BLACK);
    setPreferredSize(new Dimension(B_WIDTH, B_HEIGHT));
    setDoubleBuffered(true);
}

@Override
public void addNotify() {
    super.addNotify();

    thread = new Thread(this);
    thread.start();
}

public void paintComponent(Graphics g) {
    super.paintComponent(g);
    draw(g);
}

public void draw(Graphics g) {
    super.paintComponent(g);
    Graphics2D g2d = (Graphics2D) g;
    AffineTransform old = g2d.getTransform();
    g2d.rotate(Math.toRadians(player.angle));
    g2d.drawImage(player.ship, player.x, player.y, null);
    g2d.setTransform(old);


    Toolkit.getDefaultToolkit().sync();
}


public void cycle() {
    player.y += player.vY;
}


@Override
public void run() {
    long beforeTime, timeDiff, sleep;

    beforeTime = System.currentTimeMillis();

    while (true) {


        cycle();
        repaint();

        timeDiff = System.currentTimeMillis() - beforeTime;
        sleep = DELAY - timeDiff;

        if (sleep < 0) {
            sleep = 2;
        }

        try {
            Thread.sleep(sleep);
        } catch (InterruptedException e) {
            System.out.println("Interrupted: " + e.getMessage());
        }

        beforeTime = System.currentTimeMillis();
    }
}

public class keyInput extends KeyAdapter {
    @Override
    public void keyReleased(KeyEvent e) {
        int key = e.getKeyCode();

        if(key == KeyEvent.VK_W) {
        }
    }

    @Override
    public void keyTyped(KeyEvent e) {

    }

    @Override
    public void keyPressed(KeyEvent e) {
        int key = e.getKeyCode();

        if (key == KeyEvent.VK_W) {
            player.vY -= 1;
        }

        if(key == KeyEvent.VK_A) {
            player.angle++;
        }

        if(key == KeyEvent.VK_D) {
            player.angle--;
        }
    }
}
}