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Thread: call by value and call by reference

  1. #1
    Junior Member
    Join Date
    Aug 2012
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    Default call by value and call by reference


    Here is the code of call by value and call by reference
    class test 
    	void meth (int a,int b)
    class callbyvalue 
    	public static void main(String[] args)
    		test ob=new test();
    		int i=15,j=20;
    		System.out.println("i and j before call :" +i + " " +j);
    		System.out.println("i and j after call : " + i + " " +j);
    class test1 
    int a,b;
    test1 (int i, int j)
    void meth(test1 o)
    	class callbyref
    		public static void main (String args[])
    			test1 ob=new test1 (15,20);
    			System.out.println("ob.a and ob.b before call: " +ob.a +" " + ob.b);
    			System.out.println("ob.a and ob.b after call : "+ob.a +" "+ob.b);
    When i compile test.java file , It compiles and gives me a run time error main method not found in test ,please define the main method as public static void main(String args[])

    On the other hand , when i am compiling test1.java, it is also giving the same error.My question is main method is there in both the codes . So what do we mean by this error?

    Why is it so? Please help me resolve both as i have exam . Thanks

    Last edited by helloworld922; September 2nd, 2012 at 10:36 AM.

  2. #2
    Super Moderator Norm's Avatar
    Join Date
    May 2010
    Eastern Florida
    Thanked 2,465 Times in 2,416 Posts

    Default Re: call by value and call by reference

    when i am compiling test 1.java, it is giving a run time error of could not load main class test 1.
    Not sure your question makes sense. It is not possible to have a space in a class name: test 1

    What don't you understand about the following error message:
    main method not found in test ,please define the main method as public static void main(String args[])
    What the java program is telling you seems very clear.

    Please Edit your post and wrap your code with
    to get highlighting and preserve formatting.
    If you don't understand my answer, don't ignore it, ask a question.

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