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Thread: Abstract and code output

  1. #1
    Junior Member
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    Default Abstract and code output

    Please explain me the output

    Output is : 0



    class ClassOne
    {
        int methodOne(int i, int j)
        {
            return i++ + ++j - ++i - j++;
        }
    }
     
    abstract class ClassTwo extends ClassOne
    {
        abstract int methodOne(int i, int j, int k);
     
        @Override
        int methodOne(int i, int j)
        {
            return methodOne(i, j, i+j);
        }
    }
     
    class ClassThree extends ClassTwo
    {
        @Override
        int methodOne(int i, int j, int k)
        {
            return --i - j-- + ++k - i++ + ++j - k--;
        }
    }
     
    public class MainClass
    {
        public static void main(String[] args)
        {
            ClassOne one = new ClassOne();
     
            ClassThree three = new ClassThree();
     
            System.out.println(three.methodOne(one.methodOne(10101, 20202), one.methodOne(20202, 10101)));
        }
    }

  2. #2
    Member
    Join Date
    Apr 2014
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    Default Re: Abstract and code output

    To explain the output, you need to first understand how the increment operators work. Are you having trouble understanding the difference between j++ and ++j, for instance?

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