密码框

package cn.rushangw.lesson06;

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

public class TestTextDemo02 extends JFrame {
    public TestTextDemo02(){
        Container container = getContentPane();

        JPasswordField passwordField = new JPasswordField();//密码框
        passwordField.setEchoChar('*');

        container.add(passwordField);


        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        setVisible(true);
        setBounds(1,1,500,500);

    }

    public static void main(String[] args) {
        new TestTextDemo02();
    }
}