public class mouse extends JFrame {
private int x, y;
private JLabel label;
public mouse() {
JPanel panel = new JPanel();
addMouseMotionListener(new MouseMotion());
label = new JLabel();
panel.add(label);
setPreferredSize(new Dimension(400, 200));
add(panel, BorderLayout.SOUTH);
pack();
setVisible(true);
}
private class MouseMotion extends MouseMotionAdapter {
public void mouseMoved(MouseEvent e) {
x = e.getX();
y = e.getY();
label.setText("mouse coordinate " + "(" + x + "," + y + ")");
}}
public static void main(String[]args) {
mouse a = new mouse();
}
}
当我将鼠标移动到边框时,它不是(0,0)。为什么?例如,我将鼠标移动到左上角,它显示(4,30)而不是(0,0)。
答案 0 :(得分:5)
将MouseListener或MouseMotionListener添加到JFrame的contentPane,而不是JFrame本身,否则您必须担心边框,菜单,插图等。例如:
getContentPane().addMouseMotionListener(new MouseMotion());
另外,请格式化您的代码,以便我们阅读。