java | operator is for what?

Question

What is the output of this java code and why ?

 int a = 5 | 3 ;
 System.out.println(a);

Answer 1

it's bitwise or:

5 = 110
3 = 011
5 | 3 =
    111

Answer 2

That's the bitwise-or operator.

http://leepoint.net/notes-java/data/expressions/bitops.html