IT1406 - Java Operators

• Operators are used to perform operations on variables and values.
• In the example below, we use the + operator to add together two values:

Example

int x = 100 + 50;

• Although the + operator is often used to add together two values, like in the example above, it can also be used to add together a variable and a value, or a variable and another variable:

Example

int sum1 = 100 + 50;        // 150 (100 + 50)
int sum2 = sum1 + 250;      // 400 (150 + 250)
int sum3 = sum2 + sum2;     // 800 (400 + 400)

• Java divides the operators into the following groups:

1. Arithmetic operators
2. Assignment operators
3. Comparison operators
4. Logical operators
5. Bitwise operators
6. Arithmetic Operators

Arithmetic operators 

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; 

The addition assignment operator (+=) adds a value to a variable: 

Example
int x = 10;
x += 5;

A list of all assignment operators:


Java Comparison Operators

• Comparison operators are used to compare two values:

Java Logical Operators

• Logical operators are used to determine the logic between variables or values: