java - 密码为星号 (*)

Question

我的密码程序可以隐藏键盘输入。当我输入密码时它是不可见的。

但我的问题是如何将密码输入显示为星号（*）

有人能帮帮我吗？:p

我的代码在这里：

public void login()
    {
        Scanner input = new Scanner(System.in);//create Scanner object

        System.out.println("\n");


        Console console = System.console();

        char[] ad_password = "admin".toCharArray();
        char[] sm_password = "salesman".toCharArray();

        char[] passwordEntered = console.readPassword("Enter Password To Access The Project ( As Admin / Sales Man ): ");

        if (Arrays.equals(ad_password, passwordEntered))
        {
            System.out.println("\n Congratulation!!! Access granted \n");
            System.out.println("\n Welcome Admin. :-) \n\n");

            Shoping_mall obj_ad_dis=new Shoping_mall();

            obj_ad_dis.ad_dis();
        }

        else if(Arrays.equals(sm_password, passwordEntered))
        {
            System.out.println("\n Congratulation!!! Access granted \n");
            System.out.println("\n Welcome Sales Man. :-) \n\n");

            Shoping_mall obj1_sm_dis=new Shoping_mall();
            obj1_sm_dis.sm_dis();
        }

        else
        {
            System.out.println("\n Error: Your Password Doesn't Meet. Access Denied !!! :-( \n\n");
            System.out.println("\n Enter Correct Password.\n\n");

            Shoping_mall obj_login=new Shoping_mall();//creat object for calling Admin_works() method
            obj_login.login();
        }
    }

Answer 1

您可以使用 JPasswordField 来做到这一点；下面是一个例子：

    private JPasswordField password;
    private String typedPassword;
    private final String defaultPassword = "yourDesiredPassword";

    public void createPasswordField(){

    password = new JPasswordField(30);
    password.setBounds(280, 240, 90, 20);
    password.setEchoChar('*');
    password.setBackground(Color.white);
    password.addActionListener(new ActionListener() {

        @Override
        public void actionPerformed(ActionEvent e) {

            password = (JPasswordField) e.getSource();
            char [] tempPass = password.getPassword();
            typedPassword = new String(tempPass);

            if (!typedPassword.equals(defaultPassword)){

                JOptionPane.showMessageDialog(null,
            "Your password is not correct",
            "Stack Over Flow example",
            JOptionPane.ERROR_MESSAGE);
            }
        }
    });
}