Java创建一个及对话框

package zhongyu;

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

public class Demo extends JDialog{
public Demo() {
Container c = getContentPane();

c.add(new JLabel("博主是帅哥！！！"));
setVisible(true);
setBounds(300,300,300,300);
}

public static void main(String[] args) {
JFrame f = new JFrame("父窗体");
f.setBounds(100,100,620,620);
Container c = f.getConten

Java创建一个及对话框最先出现在Python成神之路。