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Thread: If condition not working.

  1. #1
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    Default If condition not working.

    Hello, i'm trying to make a program that checks for your username and password which are stored in strings, it seems to take the else route everytime i enter the username right though.
    import java.util.Scanner;
    public class passwordCheck {
    	public static void main(String args[]){
    		String password = "test123";
    		 String username = "variumzky";
    		  Scanner check = new Scanner(System.in);
    		   System.out.println("Enter your username here:");
    		     if (check.nextLine() == username){
    		    	 System.out.println("Enter your password");
    		     }else{
    		    	 System.out.println("No username like that was recognized in our database");
    		    	 check.close();
    		     }
     
    		    }
    	}


  2. #2
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    Default Re: If condition not working.

    hello,
    try the equal method instead of == operator and see what you get which in your case:
    if(check.nextLine().equals(username))
    {...}

  3. #3
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    Default Re: If condition not working.

    Thank you sir!

    --- Update ---

    Quote Originally Posted by Alaa View Post
    hello,
    try the equal method instead of == operator and see what you get which in your case:
    if(check.nextLine().equals(username))
    {...}
    I'm still kinda curious though, why didn't the == operator work?

  4. #4
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    Default Re: If condition not working.

    hello,
    think of check.next() and username are different objects since String objects are immutable. you cant compare two objects by == operator however java team provided the method equals to compare their values instead of the actual objects. that said, with == operator you compare between the two String objects while with equals you are comparing their values if they are the same. helpful?

  5. The Following User Says Thank You to Alaa For This Useful Post:

    Variumzky (July 29th, 2013)

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