点击鼠标不同的建（左、中、右）画一个不同颜色的圆

[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();
	}
}