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

x+=y and x=x+y are not same.

x+=y is equivalent to x=(Type of x)(x+y)

byte x=4;
byte y=3;
x+=y; // x =(byte)(x+y)
x = x + y; // compile time error