a += a++ * a++ * a++ in Java. How does it get evaluated?

Question

I came across this problem in this website, and tried it in Eclipse but couldn\'t understand how exactly they are evaluated.

    int x = 3, y = 7, z = 4;

          


        

Answer 1

Because the increment Operation ++ is added after the variable x. That's a post increment operation. That means, x is incremented after the operation is handled.

In your example the expression would be: 
x += 3 * 4 * 5
First the expression is added by 3 (x+=....)
then the first x++ results in 3
the second x++ results in 4 (because it was incremented before)
and the third x++ results in 5.

If you want your variable incremented before the operation is executed, you have to write ++x (pre increment operation)