java鼠标点击事件点击，每次点击都要出来很多次

Question

package com.chenwanguo;

import java.awt.Color;

import java.awt.Graphics;

import java.awt.event.MouseEvent;

import java.awt.event.MouseListener;

import javax.swing.JPanel;

public class MyPanel extends JPanel implements MouseListener{

int x;

int y;

int[][] chess=new int[15][15];

MyPanel(){

this.setBounds(0, 0, 600, 600);

this.setBackground(Color.cyan);

}

@Override

protected void paintComponent(Graphics g) {

// TODO Auto-generated method stub

super.paintComponent(g);

for(int i = 1;i<=15;i++){

g.drawLine(30,30*i,450,30*i);

g.drawLine(30*i,30,30*i,450);

}

g.fillRect(145, 145, 10, 10);

g.fillRect(325, 145, 10, 10);

g.fillRect(145, 325, 10, 10);

g.fillRect(325, 325, 10, 10);

g.fillRect(235, 235, 10, 10);

this.addMouseListener(this);

g.fillOval(x, y, 30, 30);

}

@Override

public void mouseClicked(MouseEvent e) {

// TODO Auto-generated method stub

x=e.getX();

y=e.getY();

//System.out.println(x+","+y);

x=(x+15)/30*30-15;

y=(y+15)/30*30-15;

repaint();

System.out.println(x+","+y);

}

@Override

public void mouseEntered(MouseEvent e) {

// TODO Auto-generated method stub

}

@Override

public void mouseExited(MouseEvent e) {

// TODO Auto-generated method stub

}

@Override

public void mousePressed(MouseEvent e) {

// TODO Auto-generated method stub

}

@Override

public void mouseReleased(MouseEvent e) {

// TODO Auto-generated method stub

}

}

Answer 1

把目标界面设置成单例模式