[java]代码库import java.awt.Color;

import java.awt.Graphics;

import java.awt.event.MouseEvent;

import java.awt.event.MouseListener;

import javax.swing.JFrame;

public class T1 extends JFrame{

int x;

int y;

Color c;

public T1(){

this.setSize(600,400);

this.setDefaultCloseOperation(2);

this.setVisible(true);

this.addMouseListener(shubiaodianji());

}

public void paint(Graphics g){

super.paint(g);

g.setColor(c);

g.fillOval(x-100, y-100, 200, 200);

}

private MouseListener shubiaodianji() {

MouseListener m = new MouseListener() {

@Override

public void mouseReleased(MouseEvent e) {

// 鼠标松开的那一瞬间

}

@Override

public void mousePressed(MouseEvent e) {

// 鼠标按下的那一瞬间

if(e.getButton()==MouseEvent.BUTTON1){

c = Color.red;

setTitle("左键");

}else if(e.getButton()==MouseEvent.BUTTON2){

c = Color.orange;

setTitle("中键");

}else if(e.getButton()==MouseEvent.BUTTON3){

c = Color.cyan;

setTitle("右键");

}else{

setTitle("不知道啥按键");

}

x=e.getX();

y=e.getY();

repaint();//重新绘图

}

@Override

public void mouseExited(MouseEvent e) {

// 鼠标退出JFrame界面的那一瞬间

}

@Override

public void mouseEntered(MouseEvent e) {

// 鼠标计入JFrame的那一瞬间

}

@Override

public void mouseClicked(MouseEvent e) {

// 鼠标点击事件按钮

}

};

return m;

}

public static void main(String[] args) {

new T1();

}

}