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 a = 100 + 50;
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 | a + b |
| - | Subtraction | Subtracts one value from another | a - b |
| * | Multiplications | Multiplies two values | a * b |
| / | Division | Divides one value by another | a / b |
| % | Modulus | Returns the division remainder | a % b |
| ++ | Increment | Decreases the value of a variable by 1 | ++a |
Assignment Operators
Assignment operators are used in Java to assign values to variables.
There are several different assignment operators in Java. The most basic assignment operator is the equals (=) sign.
| Operator | Description | Example |
|---|---|---|
| = | Simple assignment operator | a=2 |
| += | Add and assignment operator | a+=2 |
| -= | Subtract and assignment operator | a-=2 |
| *= | Multiply and assignment operator | a*=2 |
| /= | Divide and assignment operator | a/=2 |
| ++ | Modulus and assignment operator | a%=2 |
| <<= | Shift left and assignment operator | a<<=2 |
| >>= | Shift right and assignment operator | a>>=2 |
| >>>= | Unsigned shift right and assignment operator | a>>>=2 |
| &= | Bitwise AND and assignment operator | a&=2 |
| ^= | Bitwise XOR and assignment operator | a^=2 |
Logical Operators
Logical operators in Java are used to combine multiple conditional statements. There are three types of logical operators in Java:
- AND operator (&&)
- OR operator (||)
- NOT operator (!)
| Operator | Name | Description | Example |
|---|---|---|---|
| && | Logical and | Returns true if both statements are true | a < 5 && a < 10 |
| || | Logical or | Returns true if one of the statements is true | a < 5 || a < 4 |
| ! | Logical not | Reverse the result, returns false if the result is true | !(a < 5 && a < 10) |