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Thread: Don't understand why "if else" don't work.

  1. #1
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    Default Don't understand why "if else" don't work.

    I just don't understand why "if" statement always get "false". Can someone explain me it, pls?


    import java.util.Scanner;
     
    public class Test 
    {
        public static void main(String[] args) 
    {
            String b, c;
            Scanner scanText = new Scanner(System.in);
            System.out.print("Enter key word: ");
            b = scanText.next();  //typing "key"
            System.out.print("Enter key word once again: ");
            c = scanText.next(); //once again typing "key"
            if(c == b)
                System.out.println("Access allowed.");
            else
                System.out.println("Access denied.");
        }
    }

    Why I can't reach "Access allowed."?
    Not if(c == b), nor if("key" == b) or if( (c="key") == b).

    Thank you in advance for your help.
    Last edited by Brume; November 15th, 2019 at 11:19 AM.

  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Don't understand why "if else" don't work.

    Use the equals method to compare the contents of String objects, not the == operator.

    Please edit your post and wrap your code with code tags:

    [code]
    **YOUR CODE GOES HERE**
    [/code]

    to get highlighting and preserve formatting.
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
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    Default Re: Don't understand why "if else" don't work.

    Thank you for answering.
    Actually, not long before I found out also, that, for example if (c == b), it's compares addresses, not actual data.

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