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