Operator precedence:
Which operator is performed first in an expression with more than one operators.

Operator:
Symbol that tells the compiler to perform specific mathematical function.

Operand:
On which operation is to be performed.

Example:
a = b * c;
Here a, b and c are operands.
* represents operator.

Associativity:
If two or more operators have some precedence then how we have to calculate by left to right or right to left.

How many types of Operators?

Operator Precedence and Associativity:

Precedence	Operator	Description	Associativity
1	[] () .	Array index. Method call. Member access.	Left to Right.
2	++ -- +- ~ !	Prefix or Postfix increment. Prefix or Post fix decrement. Unary plus, minus. Bitwise NOT. Logical NOT.	Right to left.
3	(typecast). New.	Typecast. Object creation.	Right to left.
4	* / %	Multiplication. Division. Remainder.	Left to Right.
5	+- +	Addition Subtraction. String Concatenation.	Left to Right.
6	<< >> >>>	Left shift. Right shift. Zero fill right shift.	Left to Right.
7	< <= > >= instanceof	Less than. Less than or equal to. Greater than. Greater than or equal to. Reference test.	Left to right.
8	== !=	Equal to. Not equal to.	Left to Right.
9	&	Bitwise AND.	Left to Right.
10	^	Bitwise XOR.	Left to Right.
11	|	Bitwise OR.	Left to Right.
12	&&	Logical AND.	Left to Right.
13	||	Logical OR.	Left to Right.
14	?:	Ternary.	Right to Left.
15	= += -= *= /= %= &= |= ^= <<= >>= >>>=	Assignment and short hand assignment.	Right to Left.