Why does my username enter is false/wrong? Java

this is my code :

import java.util.Scanner;

public class OnlineBookStore {

public static void main(String[] args) {
    
    Scanner in = new Scanner(System.in);
    
    System.out.println("Welcome to my online book store!");
    System.out.println(" ");
    System.out.println("Which user are you?");
    System.out.println("1. Admin");
    System.out.println("2. Buyer");
    System.out.println("3. Seller");
    int option = in.nextInt();
    
    if (option == 1) { 
        
        String user, pass;
        
        System.out.println("Enter your username: ");
        user = in.nextLine();
        
        System.out.println("Enter the password: ");
        pass = in.nextLine();
        
        if(user.equals("Admin1") || (pass.equals("Best"))) {
            System.out.println("test");
        } else { 
            System.out.println("Wrong password.");
        }
    }
}

}

this is the output:

Welcome to my online book store!

Which user are you?

1. Admin
2. Buyer
3. Seller

1

Enter your username:

Enter the password:

Admin1

Wrong password.

>Solution :

What is happening is that you Scanner only read the int but did not clear the rest of the buffer, what you can do is simply make a call to nextLine() and this will fix your problem!

import java.util.Scanner;

public class Main
{
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
    
    System.out.println("Welcome to my online book store!");
    System.out.println(" ");
    System.out.println("Which user are you?");
    System.out.println("1. Admin");
    System.out.println("2. Buyer");
    System.out.println("3. Seller");
    int option = in.nextInt();
    in.nextLine();
    
        if (option == 1) { 
            
            String user, pass;
            
            System.out.println("Enter your username: ");
            user = in.nextLine();
            
            System.out.println("Enter the password: ");
            pass = in.nextLine();
            
            if(user.equals("Admin1") || (pass.equals("Best"))) {
                System.out.println("test");
            } else { 
                System.out.println("Wrong password.");
            }
        }
    }
}