Java中窗口拖动的事件

import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class WindowDragListener extends MouseAdapter {
    @Override
    public void mousePressed(MouseEvent e) {
        // 记录鼠标按下时的位置
        int x = e.getX();
        int y = e.getY();
        // 记录窗口的当前大小
        JFrame frame = (JFrame) e.getSource();
        JPanel panel = (JPanel) frame.getContentPane();
        int width = panel.getWidth();
        int height = panel.getHeight();

        // 定义鼠标移动事件
        @Override
        public void mouseDragged(MouseEvent e) {
            // 计算鼠标移动后的位置
            int newX = e.getX();
            int newY = e.getY();
            // 更新窗口的当前大小
            panel.setLocation(newX, newY);
            panel.setSize(width - newX + x, height - newY + y);
        }
    }
}