JAVA /
OPERATORS

1. ARITHMETIC

+

-

*

/ (the whole part of division: in case both numbers are whole, the result will be whole)

/ (real division: in case at least one number is a floating-point number)

% (remainder after division, modulo operator)

2. ASSIGNMENT

a = b

a += b (a = a + b)

a -= b (a = a - b)

a *= b (a = a * b)

a /= b (a = a / b)

a %= b (a = a % b)

3. RELATIONAL

Results true or false value.

== (equals with)

!= (not equals with)

>

>=

<

<=

4. LOGICAL

&& (AND)

| | (without space between them; OR)

! (NOT)

5. UNARY

+n (unary plus, optional)

-n (unary minus, inverts the sign)

++n (prefix increment operator, 1st increases, then executes)

n++ (postfix increment operator, 1st executes, then increases)

--n (prefix decrement, 1st decreases, then executes)

n-- (postfix decrement, 1st executes, then decreases)

! (logical complement operator, inverts boolean variable)

int n = 5;

System.out.println(n++); //writes 5 then n == 6

System.out.println(++n); //n == 6 then writes 6

6. BITWISE

Operations on binary forms of numbers.

~ (invert, by bits, ~N = -(N+1))

<< (left shift)

>> (right shift)

>>> (unsigned right shift)

& (bitwise AND)

| (bitwise OR)

^ (bitwise exclusive OR == XOR)

EXAMPLE FOR OR:

EXAMPLE FOR INVERT:

7. OTHER

instanceof (checks whether a variable is a member of class)

ternary (short solution for a simple "if" condition)

-> (lambda operator)

EXAMPLE FOR OTHER OPERATORS:

8. PRECEDENCE RULES

Chain equality: a = b = c is b = c, then a = b, therefore direction is <-

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