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Thread: Why can I have static int a, but not int a?

  1. #1
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    Default Why can I have static int a, but not int a?

    Why does this work:

    public class demo {
    	static int a;
    	public static void main(String args[]) {		
    		System.out.println(a);				
    	}
     
    }

    But this does not:

    public class demo {
    	int a;
    	public static void main(String args[]) {		
    		System.out.println(a);				
    	}
     
    }

    And this one also does not:
    public class demo {
     
    	public static void main(String args[]) {
    	static int a;		
    		System.out.println(a);				
    	}
     
    }

  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Why can I have static int a, but not int a?

    Please copy the full text of the compiler's error message and paste it here.
    The error message should explain what the problem is.
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
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    Default Re: Why can I have static int a, but not int a?

    In the second case, the "a" variable is not static. Just a package-private instance variable. Instance variables cannot be accessed from a static scope.
    In the third case, you cannot use static keyword inside a method.
    Please note, static variables and methods are related to the class and not the instance.

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