Why does this Java code with “+ +” compile?

Question

I\'m curious why this simple program could be compiled by java using IntelliJ (Java 7).

public class Main {
    public static void main(String[] args)
    {
         


        

Answer 1

10 is a literal not a variable. As such, 10 cannot be incremented.

++somevariable increments somevariable.

++variable -> increment operator.

+ + someliteral will just equate to someliteral.

+ + literal -> successive unary + operator