getText() 与 getPassword()

2022-01-22 00:00:00 passwords java swing jpasswordfield

我目前正在为一家虚构的公司设计登录系统，现在我只有主登录，需要大量清理.下面是我的登录处理程序.

I'm currently designing a login system for a make-believe company, right now all I have is the Main login, which needs a lot of cleaning up. Below is my login handler.

private class LoginButtonHandler implements ActionListener {
    public void actionPerformed(ActionEvent e) {
        if(_uid.getText().equalsIgnoreCase("Nathan") && _pwd.getText().equals("password")) {
            JOptionPane.showMessageDialog(null, "Congratulations on logging in!");
        } else {
          JOptionPane.showMessageDialog(null, "Error on login!");
        }
    }
}

按原样，这工作得很好，但是当我将其更改为

As is, this works perfectly fine, but when I change it to

_pwd.getPassword.equals("password")

当一切输入正确时，它直接指向 else 语句.这里有什么问题?完整程序如下.

it directs straight to the else statement when everything is input correctly. What is wrong here? Full program below.

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

public class Main extends JFrame {
    private static final int HEIGHT = 90;
    private static final int WIDTH = 400;

    JTextField _uid = new JTextField(10);
    JPasswordField _pwd = new JPasswordField(10);
    JButton _login = new JButton("Login");
    JButton _reset = new JButton("Reset");

    public Main() {
       super("Login - Durptech");
        Container pane = getContentPane();
        setLayout(new FlowLayout());

        add(new JLabel("User ID:"));
            add(_uid);
        add(new JLabel("Password:"));
            add(_pwd);

            add(_login);
                _login.addActionListener(new LoginButtonHandler());
            add(_reset);
                _reset.addActionListener(new ResetButtonHandler());

        /*if(_uid.getText().equals("") && _pwd.getText().equals("")) {
            _login.setEnabled(false);
        } else {
            _login.setEnabled(true);
        }*/

       setSize(WIDTH, HEIGHT);
       setResizable(false);
       setLocation(500, 300);
       setDefaultCloseOperation(EXIT_ON_CLOSE);
       setVisible(true);
    }

    private class ResetButtonHandler implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            _uid.setText("");
            _pwd.setText("");
            _uid.requestFocusInWindow();
        }
    }

    private class LoginButtonHandler implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            if(_uid.getText().equalsIgnoreCase("Nathan") && _pwd.getText().equals("password")) {
                JOptionPane.showMessageDialog(null, "Congratulations on logging in!");
            } else {
              JOptionPane.showMessageDialog(null, "Error on login!");
            }
        }
    }

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

推荐答案

password.getPassword() 返回一个 char[]，而 char[] 不等于 Strings.所以你需要将它与 char[] 进行比较:

password.getPassword() returns a char[], and char[]'s aren't equal to Strings. So you need to compare it to a char[]:

if (Arrays.equals(password.getPassword(), new char[]{'p','a','s','s','w','o','r','d'}))

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