GUI_鼠标事件

所有的组件都有鼠标和键盘监听器

import java.awt.Button;

import java.awt.FlowLayout;

import java.awt.Frame;

import java.awt.TextField;

import java.awt.event.MouseAdapter;

import java.awt.event.MouseEvent;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;



class MouseDemo {

    private Frame f;

    private TextField tf;

    private Button bun;

    public MouseDemo() {

        init();

    }

    public void init() {

        f = new Frame("演示鼠标监听");

        f.setSize(600,500);//设置窗体大小,横坐标，从坐标

        f.setLocation(300,200);//设置窗体显示的位置

        f.setLayout(new FlowLayout());

        

        

        tf = new TextField(15);

        bun = new Button("Yes");

        

        f.add(tf);

        f.add(bun);

        

        

        MyEvent();

        f.setVisible(true);

    }

    

    private void MyEvent() {

        f.addWindowListener(new WindowAdapter() {

            @Override

            public void windowClosing(WindowEvent e) {

                System.exit(0);

                super.windowClosing(e);

            }

        });

        

        //在按钮上添加鼠标监听

        bun.addMouseListener(new MouseAdapter() {

            private int count = 0;

            @Override

            public void mouseEntered(MouseEvent e) {

                System.out.println("mouse enter"+count++);

                tf.setText(count+"");

                super.mouseEntered(e);

            }

            @Override

            public void mouseClicked(MouseEvent e) {

                if(e.getClickCount()==2){            //实现双击

                    System.out.println("mouse click"+count++);

                }

                //System.out.println("mouse click"+count++);

                super.mouseClicked(e);

            }

            

        });

    }

    

    

    

    public static void main(String[] args){

        new MouseDemo();

    }

    

}

 

 当一个按钮(组件)中绑定了两个监听器，一个是鼠标监听，一个是活动监听，那么鼠标监听先执行