java - 循环不能正常工作

Question

我的程序目前遇到问题，它无法正确循环，请帮助我解决。代码如下。提前致谢!

import java.util.Scanner;
import javax.swing.JOptionPane;
import javax.swing.*;
public class Wewe{
    public static void main(String[]args){
        Scanner inp = new Scanner(System.in);
        boolean tryAgain;
        do{
        System.out.print("\nInput username: ");
        String user = inp.nextLine();
        System.out.print("\nInput password: ");
        String pass = inp.nextLine();
    if(user.equals("admin") && pass.equals("admin")){
            System.out.print("Success!");
            tryAgain = true;
        }
        if(user!="admin" && pass!="admin"){
            JOptionPane.showMessageDialog(null, "Try again! Invalid username or password!","Error Logging-In", JOptionPane.ERROR_MESSAGE);
        tryAgain = false;
    }
}while(tryAgain = true);
        }
    }

我想要发生的是，一旦用户输入错误的用户名或密码，程序就会循环。但如果用户输入了正确的用户名或密码，它不会循环询问用户正确的用户名或密码。

Answer 1

尝试这样:

public static void main(String[]args){
        Scanner inp = new Scanner(System.in);
        boolean tryAgain = true;
        do{
        System.out.print("\nInput username: ");
        String user = inp.nextLine();
        System.out.print("\nInput password: ");
        String pass = inp.nextLine();
    if(user.equals("admin") && pass.equals("admin")){
            System.out.print("Success!");
            tryAgain = false;
        }
        if(!user.equals("admin") || !(pass.equals("admin")){
            JOptionPane.showMessageDialog(null, "Try again! Invalid username or password!","Error Logging-In", JOptionPane.ERROR_MESSAGE);
        tryAgain = true;
    }
}while(tryAgain);
        }
    }