Java Logical Operators
Logical Operators
As with comparison operators, you can also test for true or false
values with logical operators.
Logical operators are used to determine the logic between variables or values:
| Operator | Name | Description | Example | Try it |
|---|---|---|---|---|
| && | Logical and | Returns true if both statements are true | x < 5 && x < 10 | Try it » |
| || | Logical or | Returns true if one of the statements is true | x < 5 || x < 4 | Try it » |
| ! | Logical not | Reverse the result, returns false if the result is true | !(x < 5 && x < 10) | Try it » |
Real-Life Example: Login Check
The example below shows how logical operators can be used in a real situation, e.g. when checking login status and access rights:
Example
boolean isLoggedIn = true;
boolean isAdmin = false;
System.out.println("Regular user: " + (isLoggedIn && !isAdmin));
System.out.println("Has access: " + (isLoggedIn || isAdmin));
System.out.println("Not logged in: " + (!isLoggedIn));
Result:
Is regular user: true
Has any access: true
Not logged in: false
Video: Java Operators
