Hey Leute, ich versuche, meine Player-Klasse zu bewegen, wenn ich links oder rechts schlüge, aber nichts passiert/Ich bin neu in Java und nicht wirklich verstehen, warum es nicht funktioniert. Ich habe keine Fehler aber trotzdem passiert nichts. Danke für jede Hilfe. Auch, wenn Sie mir erklären könnten, warum es nicht funktioniert, wäre das wirklich hilfreich.Warum kann ich ein Rechteck nicht mithilfe von Navigationstasten in Java verschieben?
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import javax.swing.JFrame;
import static javax.swing.JFrame.EXIT_ON_CLOSE;
import javax.swing.JPanel;
import javax.swing.Timer;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class GamePanel extends JPanel implements ActionListener, KeyListener {
public final static int WIDTH = 700, HEIGHT = 450;
public Game game;
public Player player;
public GamePanel(Game game) {
setBackground(Color.WHITE);
this.game = game;
addKeyListener(this);
setFocusable(true);
}
public void update() {
player.update();
}
@Override
public Dimension getPreferredSize() {
return new Dimension(WIDTH, HEIGHT);
}
public void init() {
System.out.println("!!");
player = new Player(this, KeyEvent.VK_LEFT, KeyEvent.VK_RIGHT, getHeight() - 50, getWidth()/2);
repaint();
}
public void actionPerformed(ActionEvent e) {
update();
repaint();
}
public Player getPlayer(int playerNo) {
return player;
}
public void keyPressed(KeyEvent e) {
player.pressed(e.getKeyCode());
}
public void keyReleased(KeyEvent e) {
player.released(e.getKeyCode());
}
public void keyTyped(KeyEvent e) {
;
}
@Override
public void paintComponent(Graphics g) {
super.paintComponent(g);
if (player != null) {
player.paint(g);
}
}
}
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import javax.swing.JFrame;
import static javax.swing.JFrame.EXIT_ON_CLOSE;
import javax.swing.JPanel;
import javax.swing.Timer;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class Player {
public static final int WIDTH = 50, HEIGHT = 50;
public GamePanel game;
public int left, right;
public int y;
public int x, xa;
public Player(GamePanel game, int left, int right, int y, int x) {
this.game = game;
this.left = left;
this.right = right;
this.x = x;
y = game.getHeight() - HEIGHT;
x = game.getWidth()/2;
}
public void update() {
if (x > 0 && x < game.getWidth() - WIDTH) {
x += xa;
} else if (x == 0) {
x++;
} else if (x == game.getWidth() - WIDTH) {
x--;
}
}
public void pressed(int keyCode) {
if (keyCode == left)
xa = -1;
else if (keyCode == right)
xa = 1;
}
public void released(int keyCode) {
if (keyCode == left || keyCode == right)
xa = 0;
}
public Rectangle getBounds() {
return new Rectangle(x, y, WIDTH, HEIGHT);
}
public void paint(Graphics g) {
System.out.println(x + "x" + y);
g.fillRect(x, y, WIDTH, HEIGHT);
g.setColor(Color.ORANGE);
}
}