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);
//放东西,需要容器
Container container = this.getContentPane();
container.setLayout(null);
//按钮
JButton button = new JButton("点击一个对话框");
button.setBounds(30,30,200,50);
//点击这个按钮的时候,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); 默认就有关闭事件
Container container = this.getContentPane();
container.setLayout(null);
container.add(new Label("学习永无止境"));
}
}