package day02;import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;public class lei4j extends JFrame implements ActionListener {//创建文本框JTextField tiaomu = new JTextField(40);//创建密码文本框JPasswordField JK = new JPasswordField(100);//创建按钮对象JButton anniu = new JButton("点击");public  lei4j  () {//获取密码框文字String text1 = JK.getText();//获取文本框文字String text = tiaomu.getText();//绑定动作监听anniu.addActionListener(this);//设置按键位置大小anniu.setBounds(100,100,100,100);//把按钮添加进入界面getContentPane().add( anniu );extracted();//设置界面是否显示setVisible(true);}private void extracted() {//设置界面大小setSize(500,500);//设置界面关闭方式setDefaultCloseOperation(3);//设置界面居中setLocationRelativeTo(null);//设置界面是否能拖拉改变大小setResizable(false);//设置组件显示布局setLayout(null);//显示页面setAlwaysOnTop(true);}//选择器固定写法public  int qiedin (){return JOptionPane.showConfirmDialog(this,"是否删除","删除确认",JOptionPane.YES_NO_OPTION);}@Overridepublic void actionPerformed(ActionEvent e) {int qiedin = qiedin();System.out.println(qiedin );}