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Thread: Why is if statement false?

  1. #1
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    Default Why is if statement false?

    This application:

    class Method4
    {
    public static void main( String[] args )
    {
    System.out.println( "args[0] = " + args[0] );
    System.out.println( "args[1] = " + args[1] );

    if (args[1] == "test1")
    {
    System.out.println( "args[1] using if statement= " + args[1] );
    }
    }
    }
    Executing with this line:
    >java Method4 test0 test1

    yields this output:
    args[0] = test0
    args[1] = test1

    Question: Why is the if statement false?


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Why is if statement false?

    You should use the equals() method to compare String objects, not the == operator.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Why is if statement false?

    I will do that but why does my code not work?

  4. #4
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    Default Re: Why is if statement false?

    why does my code not work?
    Because == doesn't compare the contents of an object.
    If you don't understand my answer, don't ignore it, ask a question.

  5. #5
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    Default Re: Why is if statement false?

    Is it comparing the references?

  6. #6
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    Default Re: Why is if statement false?

    Yes.
    If you don't understand my answer, don't ignore it, ask a question.

  7. #7
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    Default Re: Why is if statement false?

    Java: Whats the difference between equals() and ==? might help you understand the difference between == and equals().
    Last edited by jashburn; April 22nd, 2014 at 07:25 PM. Reason: Fix link label

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