点击鼠标，显示鼠标的坐标，以及点击鼠标显示坐标，松开鼠标不显示坐标

本文主要是介绍点击鼠标，显示鼠标的坐标，以及点击鼠标显示坐标，松开鼠标不显示坐标，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

鼠标事件驱动包含7种事件和两种监听器

对于鼠标事件有7种鼠标事件：

1、鼠标按下后使用 mousePressed

2、鼠标释放后使用 mouseReleased

3、鼠标被点击后使用 mouseClicked

4、鼠标离开源组件后使用 mouseExited

5、鼠标进入源组件后使用 mouseEntered

6、按住鼠标并移动时调用 mouseDragged

7、松开鼠标进行移动时调用 mouseMoved

两种监听器：

1、mouseListener 监听鼠标的按下、释放、点击、移入、移出

2、mouseMotionListener监听鼠标的拖动和移动等行为

这两个小程序是鼠标的点击和释放因此用到的都是mouseListener及其对应的适配器mouseAdapted

package fourteen;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Exercise14_4 extends JFrame{
   int x = 20;
   int y = 20;
   public Exercise14_4(){
       coorPanel p = new coorPanel();
       add(p);

   }
   public static void main(String[] args) {
       Exercise14_4 frame = new Exercise14_4();
       frame.setTitle("Exercise14_4");
       frame.setSize(300, 200);
       frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
       frame.setVisible(true);
   }

   class coorPanel extends JPanel{
       coorPanel(){
               addMouseListener(new MouseAdapter() {//监听器 +适配器
               public void mouseClicked(MouseEvent e) {
                   x = e.getX();
                   y = e.getY();
                   repaint();
               }
           });
       }
       protected void paintComponent(Graphics g) {
           super.paintComponent(g);
           g.drawString("(" + x + "," + y +")", x, y);
       }
   }
}

鼠标点击显示坐标，释放时不显示坐标，简单的采用一个if语句就可以解决问题

package fourteen;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Exercise14_4_2 extends JFrame{
   int x = 20;
   int y = 20;
   int z = 1;
   public Exercise14_4_2(){
       coorPanel p = new coorPanel();
       add(p);

   }
   public static void main(String[] args) {
       Exercise14_4_2 frame = new Exercise14_4_2();
       frame.setTitle("Exercise14_4");
       frame.setSize(300, 200);
       frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
       frame.setVisible(true);
   }

   class coorPanel extends JPanel{
       coorPanel(){
               addMouseListener(new MouseAdapter() {//监听器 +适配器
               public void mousePressed(MouseEvent e) {
                   x = e.getX();
                   y = e.getY();
                   repaint();
                   z=0;
               }
               public void mouseReleased(MouseEvent e) {
                   x = e.getX();
                   y = e.getY();
                   z=1;
                   repaint();
               }
           });
       }
       protected void paintComponent(Graphics g) {
           super.paintComponent(g);
           if(z==0)
               g.drawString("(" + x + "," + y +")", x, y);
           else
               System.out.println("asd");
               g.drawString(" ", x, y);
       }
   }
}