Other than readability, is there any value add if I use += operator like x+=y instead of x=x+y in java

Question

I do understand that both += and var1=var1+var2 both do the same thing in Java. My question is, apart from better readability, what other benefit(if any) the former brings? Im asking because I was curious why java developers introduced this, they should have done it because of some value addition.

Answer 1

It prevents the LHS of the + operation from being evaluated twice.

var.getSomething().x = var.getSomething().x + y;

This is not equivalent to

var.getSomething().x += y;

However, the added value from increased readability and reduced typing effort is not to be underestimated.