What is the final keyword in Java?

What is the final keyword in Java?

The final keyword in Java is used to declare constants, methods that cannot be overridden, and classes that cannot be subclassed.

Can you give me an example of using final with a variable?

Sure! For example: final int MAX_VALUE = 100; This means MAX_VALUE cannot be changed after it's initialized.

What happens if I try to change a final variable?

If you try to change a final variable, the compiler will throw an error, indicating that the variable cannot be reassigned.

Can final be used with methods?

Yes, when a method is declared as final, it cannot be overridden by subclasses, ensuring its behavior remains unchanged.

What about final classes?

A final class cannot be subclassed, which means no other class can extend it. This is useful for creating immutable classes.