Operators

Simple summary of operators in Java.

Bitwise operators

AND

AND operator produces 1 only if both numbers are 1. So, 1 | 2 should produce 0. On the other hand, 1 | 3 should print 1, becuase they will have one 1 in common (then 1 in the middle of that binary number).

int one = 1; // is 001 in binary
int two = 2; // is 010 in binary
int three = 3; // is 011 in binary

int and = one & two;
System.out.println(and); // prints out 0

one &= three;
System.out.println(one) // prints out 1

OR

001 OR 010 will result in 011, which is 3. Also 011 OR 011 will result in the same number. Because you need to take each binary number and apply OR. Lets take 1 and 0 from the first example, that are on zeroth position, 001 and 010, 1 OR 0 results in 1. 1 OR 1 results in 1. 0 OR 1 results in 1.

int one = 1; // is 001 in binary
int two = 2; // is 010 in binary
int three = 3; // is 011 in binary

int or = one | two; 
System.out.println(or); // prints out 3

or |= three;
System.out.println(or);// prints out 3