javaGUI–Swing之[Dialog]弹窗

package cn.usts.edu.lesson04;

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

public class JDialogDemo extends JFrame {

    JButton button01,button02,button03;

    public JDialogDemo() {
        this.setBounds(200,200,400,200);
        this.setVisible(true);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        // 获取容器
        Container container = this.getContentPane();
        // 绝对布局
        container.setLayout(null);

        // 按钮
        button01 = new JButton("点击弹出一个对话框");
        button01.setBounds(30,30,200,50);

        // 按钮监听
        button01.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                // 弹窗
                new MyDialogDemo();
            }
        });

        this.add(button01);// 添加组件
    }

    public static void main(String[] args) {
        new JDialogDemo();
    }
}

class MyDialogDemo extends JDialog{
    public MyDialogDemo() {
        this.setBounds(100,100,500,500);
        this.setVisible(true);
        this.setTitle("hello");
        Container container = this.getContentPane();
        container.setLayout(null);

        JLabel jLabel = new JLabel("我的第一个弹窗");
        jLabel.setBounds(10,10,100,20);// label需要设置大小才能看的到
        
        container.add(jLabel);
    }
}