GUI编程——弹窗

弹窗

JDialog , 用来被弹出，默认就有关闭事件！

 

package com.kuang.lesson04;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class DialogDemo extends JFrame {
    public DialogDemo() {
        this.setVisible(true);
        this.setSize(700, 500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        //JFrame
        Container container = this.getContentPane();
        //绝对布局
        container.setLayout(null);

        //按钮
        JButton button = new JButton("点击弹出一个");
        button.setBounds(30, 30, 200, 50);

        //点击这个按钮时，弹出一个弹窗
        button.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                //弹窗
                new MyDialogDemo();
            }
        });
        container.add(button);
    }
        public static void main (String[] args){
            new DialogDemo();
        }
    }

    //弹窗的窗口
    class MyDialogDemo extends JDialog {
        public MyDialogDemo() {
            this.setVisible(true);
            this.setBounds(100,100,500,500);
            //this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

            Container container=this.getContentPane();
            container.setLayout(null);

            container.add(new Label("欢迎学习Java！"));

        }
    }