一个很吊的swing循环生成窗口。

import javax.swing.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
 
public class popupWindows{
    JFrame mainWindow;
    public popupWindows(){
        mainWindow = new JFrame("pop up window");
        //mainWindow.setBounds(10,10,10,10);
        JButton JB = new JButton("PopUp");
        JB.addActionListener(new creatNewWindow());
        mainWindow.setVisible(true);
        mainWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        mainWindow.add(JB);
        mainWindow.pack();
    }
    class creatNewWindow implements ActionListener{
        public void actionPerformed(ActionEvent e){
            new popupWindows().mainWindow.setBounds(100,100,100,100);
        }
    }
    public static void main(String[] args){
        new popupWindows();
    }
}