Java: Checking contents of char variable with if condition

Posted by Troy on Stack Overflow See other posts from Stack Overflow or by Troy
Published on 2010-02-13T07:04:55Z Indexed on 2010/05/09 5:18 UTC
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java

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if-statement

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char

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variable

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conditional

Hello, I have a char variable that is supposed to contain either a Y,y,n or N character, I want to test if it does not contain it, then display an error message and exit the program.

This is the code I am using;

    if (userDecision != 'Y' || userDecision != 'y' || userDecision != 'n' || userDecision != 'N')
        {
            System.out.println("Error: invalid input entered for the interstate question");
            System.exit(0);
        }

Irregardless of what is in the variable it always returns true and executes the command to exit the program, what am I doing wrong?

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