8. Java Operators
Java Operators
Operators are used to perform operations on variables and values.
Java divides the operators into the following groups:
Arithmetic operators
Assignment operators
Comparison operators
Logical operators
Bitwise operators
Arithmetic Operators
Arithmetic operators are used to perform common mathematical operations.
Operator Name Description Example
Addition Adds together two values x + y
Subtraction Subtracts one value from another x - y
Multiplication Multiplies two values x * y
/ Division Divides one value by another x / y
% Modulus Returns the division remainder x % y
++ Increment Increases the value of a variable by 1 ++x
-- Decrement Decreases the value of a variable by 1 --x
Java Assignment Operators
Assignment operators are used to assign values to variables.
In the example below, we use the assignment operator (=) to assign the value 10 to a variable called x:
Example
int x = 10;
A list of all assignment operators:
Operator Example Same As
= x = 5 x = 5
+= x += 3 x = x + 3
-= x -= 3 x = x - 3
*= x *= 3 x = x * 3
/= x /= 3 x = x / 3
%= x %= 3 x = x % 3
&= x &= 3 x = x & 3
|= x |= 3 x = x | 3
^= x ^= 3 x = x ^ 3
Java Comparison Operators
Comparison operators are used to compare two values (or variables). This is important in programming, because it helps us to find answers and make decisions.
The return value of a comparison is either true or false.
== Equal to x == y
!= Not equal x != y
Java Logical Operators
You can also test for true or false values with logical operators.
&& Logical and Returns true if both statements are true
|| Logical or Returns true if one of the statements is true
! Logical not Reverse the result, returns false if the result is true