如何將兩個輸入值與兩個數組進行比較

Question

我是一名試圖完成在線課程任務的noob java程序員。我特別提到這一點，因爲課程材料沒有涵蓋這種比較字符串，並且教授還沒有回覆我的電子郵件。

我需要獲取用戶名和密碼的用戶輸入，並在兩者都正確的情況下返回結果。我查看了Oracle's Password Fields以及comparing one input to one array這裏的一個類似問題，以及在我的谷歌搜索中出現的其他一些幫助帖子。

如果我輸入名字和密碼，我的當前代碼將返回正確的，但是當我嘗試第二個代碼時，它根本沒有返回結果。即使只有一個輸入值是正確的，但兩者都需要時，它也會返回true。根據任務我使用了一個swing應用程序，所以我會先發布相關的代碼，然後發佈下面的代碼，以避免混淆。

對我所缺少的任何幫助將不勝感激。

故障部位：

// get the values entered by the user 
String str1 = name1.getText(); 
String str2 = pass1.getText(); 
//create my user info strings 
String[] userNameArray = { 
    "Vale.Vicky", 
    "Lane.Lois", 
    "Kent.Clark", 
    "Wayne.Bruce", 
    "Parker.Peter", 
    "Rogers.Steve", 
    "Luther.Lex", 
    "Osborn.Harry", 
    "Prince.Diana", 
    "Admin" 
}; 
String[] passwordArray = { 
    "BatmanFan1", 
    "SuperBoyFan1", 
    "Kryptonite1", 
    "Batman1", 
    "SpiderMan1", 
    "CtAmerica1", 
    "Letitia1", 
    "NewGoblin1", 
    "WonderWoman1", 
    "Password1" 
}; 

boolean check = true; 

//Test for matching user name 
while (true) { 
    for (String i: userNameArray) { 
    if (str1.equals(i)) { 
     checked.setText("Valid Login"); 
     check = false; 
     break; 
    } 
    } 
    //Test for matching password 
    for (String j: passwordArray) { 
    if (str2.equals(j)) { 
     checked.setText("Valid Login"); 
     check = false; 
     break; 
    } 
    } 
    //return if both false 
    if (check) { 
    checked.setText("Invalid Login, Try Again"); 
    continue; 
    } 
    break; 
} 
} 

整個項目代碼：

/** 
*Rai Duffy 
*Code Creation, Troubleshooting, and Validation Tests 
*/ 

import java.awt.EventQueue; 

import javax.swing.JFrame; 
import javax.swing.JTextField; 
import javax.swing.JLabel; 
import javax.swing.JOptionPane; 
import javax.swing.JButton; 
import java.awt.event.ActionListener; 
import java.awt.event.ActionEvent; 
import javax.swing.JPanel; 
import java.awt.Color; 
import java.awt.Font; 

public class logInChecker { 

    private JFrame frmWeek; 
    private JTextField pass1; 
    private JTextField checked; 
    private JButton btnHelp; 
    private JTextField name1; 

    /** 
    * Launch the application. 
    */ 
    public static void main(String[] args) { 
    EventQueue.invokeLater(new Runnable() { 
     public void run() { 
     try { 
      logInChecker window = new logInChecker(); 
      window.frmWeek.setVisible(true); 
     } catch (Exception e) { 
      e.printStackTrace(); 
     } 
     } 
    }); 
    } 

    /** 
    * Create the application. 
    */ 
    public logInChecker() { 
    initialize(); 
    } 

    /** 
    * Initialize the contents of the frame. 
    */ 
    private void initialize() { 
    frmWeek = new JFrame(); 
    frmWeek.getContentPane().setBackground(new Color(51, 204, 153)); 
    frmWeek.setTitle("Week 5 - Interactive Assignment"); 
    frmWeek.setBounds(100, 100, 450, 300); 
    frmWeek.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
    frmWeek.getContentPane().setLayout(null); 

    JLabel lblEnterYourUser = new JLabel("Enter Your User Name:"); 
    lblEnterYourUser.setFont(new Font("Tahoma", Font.BOLD, 11)); 
    lblEnterYourUser.setBounds(28, 36, 171, 31); 
    frmWeek.getContentPane().add(lblEnterYourUser); 

    name1 = new JTextField(); 
    name1.setColumns(10); 
    name1.setBounds(28, 68, 179, 33); 
    frmWeek.getContentPane().add(name1); 

    JLabel lblEnterYourPassword = new JLabel("Enter Your Password:"); 
    lblEnterYourPassword.setFont(new Font("Tahoma", Font.BOLD, 11)); 
    lblEnterYourPassword.setBounds(28, 112, 179, 14); 
    frmWeek.getContentPane().add(lblEnterYourPassword); 

    pass1 = new JTextField(); 
    pass1.setBounds(28, 137, 179, 31); 
    frmWeek.getContentPane().add(pass1); 
    pass1.setColumns(10); 

    JButton btnCheck = new JButton("Attempt Login"); 
    btnCheck.setBackground(new Color(204, 102, 153)); 
    btnCheck.setFont(new Font("Tahoma", Font.BOLD, 11)); 
    btnCheck.addActionListener(new ActionListener() { 
     public void actionPerformed(ActionEvent e) { 
     //define what we are looking for 

     // get the values entered by the user 
     String str1 = name1.getText(); 
     String str2 = pass1.getText(); 
     //create my user info strings 
     String[] userNameArray = { 
      "Vale.Vicky", 
      "Lane.Lois", 
      "Kent.Clark", 
      "Wayne.Bruce", 
      "Parker.Peter", 
      "Rogers.Steve", 
      "Luther.Lex", 
      "Osborn.Harry", 
      "Prince.Diana", 
      "Admin" 
     }; 
     String[] passwordArray = { 
      "BatmanFan1", 
      "SuperBoyFan1", 
      "Kryptonite1", 
      "Batman1", 
      "SpiderMan1", 
      "CtAmerica1", 
      "Letitia1", 
      "NewGoblin1", 
      "WonderWoman1", 
      "Password1" 
     }; 

     boolean check = true; 

     //Test for matching user name 
     while (true) { 
      for (String i: userNameArray) { 
      if (str1.equals(i)) { 
       checked.setText("Valid Login"); 
       check = false; 
       break; 
      } 
      } 
      //Test for matching password 
      for (String j: passwordArray) { 
      if (str2.equals(j)) { 
       checked.setText("Valid Login"); 
       check = false; 
       break; 
      } 
      } 
      //return if both false 
      if (check) { 
      checked.setText("Invalid Login, Try Again"); 
      continue; 
      } 
      break; 
     } 
     } 
    }); 
    btnCheck.setBounds(238, 136, 171, 32); 
    frmWeek.getContentPane().add(btnCheck); 

    JLabel lblYesOrNo = new JLabel("Checked Result:"); 
    lblYesOrNo.setFont(new Font("Tahoma", Font.BOLD, 11)); 
    lblYesOrNo.setBounds(189, 194, 113, 14); 
    frmWeek.getContentPane().add(lblYesOrNo); 

    checked = new JTextField(); 
    checked.setBounds(135, 219, 188, 31); 
    frmWeek.getContentPane().add(checked); 
    checked.setColumns(10); 

    } 
} 

Answer 1

因此，基於我所看到的，有userNameArray和passwordArray之間有直接的關係，這意味着在價值n在userNameArray對應於值在n在passwordArray

這意味着你的整個搜索可以歸結到一個單一的if聲明...

for (int index = 0; index < userNameArray.length; index++) { 
    if (str1.equals(userNameArray[index]) && str2.equals(passwordArray[index])) { 
     return true; 
    } 
} 
return false 

現在，話說回來，它會如此簡單得多，如果你有某種形式的簡單Java對象（PO​​JO）的其封裝了用戶名和密碼，然後可以提供驗證功能