Explanation about a Java statement

Question

public static void main(String[] args) {
    int x = 1 + + + + + + + + + 2;
    System.out.println(x);
}

I can compile above method. Is there any explanation about the allowed multiple "+" operator?

Answer 1

It's addition, then the unary plus operator repeated. It's equivalent to the following:

int x = 1 + (+ (+ (+ (+ (+ (+ (+ (+ 2))))))));

Answer 2

The reason is that + can act as a unary operator, similar to how - can be the negation operator. You are just chaining a bunch of unary operators together (with one final binary addition).