import java.awt.*;

　　import java.awt.event.*;

　　import javax.swing.*;

　　public class MoveMessageDemo extends JFrame {

　　public MoveMessageDemo() {

　　MoveMessagePanelNew p = new MoveMessagePanelNew("Welcome to Java");

　　getContentPane().setLayout(new BorderLayout());

　　getContentPane().add(p);

　　}

　　/** Main method */

　　public static void main(String[] args) {

　　MoveMessageDemo frame = new MoveMessageDemo();

　　frame.setTitle("MoveMessageDemo");

　　frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

　　frame.setSize(300, 300);

　　frame.setVisible(true);

　　}

　　}

　　// MoveMessagePanel draws a message

　　class MoveMessagePanel implements MouseMotionListener {

　　public void mouseMoved(MouseEvent e) {

　　}

　　/** Handle mouse dragged event */

　　public void mouseDragged(MouseEvent e) { //鼠标按键在组件上按下并拖动时调用。

　　// Get the new location and repaint the screen

　　System.out.println(e.getX());

　　System.out.println(e.getY());

　　}

　　}

　　// MoveMessagePanelNew draws a message

　　class MoveMessagePanelNew extends JPanel implements MouseMotionListener {

　　private String message = "Welcome to Java";

　　private int x = 20;

　　private int y = 20;

　　public MoveMessagePanelNew(String s) {

　　message = s;

　　this.addMouseMotionListener(this);

　　}

　　public void mouseMoved(MouseEvent e) {

　　}

　　public void mouseDragged(MouseEvent e) {

　　// Get the new location and repaint the screen

　　x = e.getX();

　　y = e.getY();

　　repaint();

　　}

　　protected void paintComponent(Graphics g) {

　　super.paintComponent(g);

　　g.drawString(message, x, y);

　　}

　　}