我有一个问题,我的 mouseListener 没有响应。我尝试将 mouseListener 添加到一个对象,将 keyListener 添加到另一个对象,并将paintComponent 添加到另一个对象,然后将所有对象放到 JFrame 上。我的问题是 mouseListener 没有响应,但 keyListener 和 paintComponent 是。这是我的代码:
public JFrame frame = new JFrame("JFrame Test");
public static void main(String[]args) {
new JFrameTest();
}
public JFrameTest() {
frame.setSize(100, 100);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setResizable(false);
frame.add(new keys());
frame.add(new mouse());
frame.add(new render());
frame.setVisible(true);
}
@SuppressWarnings("serial")
public class render extends JPanel {
public void paintComponent(Graphics g) {
super.paintComponent(g);
g.fillRect(0, 0, frame.getWidth() / 2, frame.getHeight() / 2);
repaint();
}
}
@SuppressWarnings("serial")
public class keys extends JPanel {
public keys() {
setFocusable(true);
addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent e) {
System.out.println("Key Pressed!");
}
public void keyReleased(KeyEvent e) {
System.out.println("Key Released!");
}
});
}
}
@SuppressWarnings("serial")
public class mouse extends JPanel {
public mouse() {
setFocusable(true);
addMouseListener(new MouseAdapter() {
public void mousePressed(MouseEvent e) {
System.out.println("Mouse Pressed!");
}
public void mouseReleased(MouseEvent e) {
System.out.println("Mouse Released!");
}
});
}
}
我确保 mouseListener 和 keyListener 都是 setFocusable(true) 并且 paintComponent 是最后添加的,因此它实际显示。好像我切换了添加 keyListener 对象和 mouseListener 对象的顺序,然后都不起作用。如果您对如何解决它有任何想法,我将不胜感激。谢谢!