新人用awt做图形化界面遇到点问题，求大佬给解决解决

Question

这个代码没问题但就是结果和我想得不一样，第二张图片我必须得点击一下关闭键才会出现标签和文本框，为什么啊？求大佬解决啊啊啊啊！！！！！！

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

public class Demo01 extends JDialog {
public Demo01(JFrame jFrame){
super(jFrame,"ss",true);
this.setBounds(100,200,100,200);
this.setLayout(new FlowLayout());
this.setBackground(Color.white);
this.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
this.setVisible(true);

this.add(new Label("zhanghu"));
this.add(new TextField(""));
}

public static void main(String[] args) {
        JFrame jFrame=new JFrame("en");
        jFrame.setBounds(100,100,100,100);
        jFrame.setLayout(new FlowLayout());
        jFrame.setBackground(Color.white);
        jFrame.add(new Label("hh"));
        jFrame.add(new TextField(" "));
        Button button=new Button("dianji");
        jFrame.add(button);
        jFrame.setVisible(true);
        jFrame.setDefaultCloseOperation(EXIT_ON_CLOSE);
        button.addActionListener(new AbstractAction() {
            @Override
            public void actionPerformed(ActionEvent actionEvent) {
                Demo01 demo01=new Demo01(jFrame);
                demo01.setVisible(true);
            }
        });
    }
}

Answer 1

    public Demo01(JFrame jFrame){
        super(jFrame,"ss",true);
        this.setBounds(100,200,100,200);
        this.setLayout(new FlowLayout());
        this.setBackground(Color.white);
        this.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
        
//     这里显示对话框的时候，你的label和textField还没有添加到Frame中，所以看不到
//        this.setVisible(true);
        
        this.add(new Label("zhanghu"));
        this.add(new TextField(""));
    }