Web Reference: Mar 9, 2026 · The final keyword is a non-access modifier used to restrict modification. It applies to variables (value cannot change) methods (cannot be overridden) and classes (cannot be extended). You can declare some or all of a class's methods final. You use the final keyword in a method declaration to indicate that the method cannot be overridden by subclasses. The Object class does this—a number of its methods are final. The final keyword is a non-access modifier used for classes, attributes and methods, which makes them non-changeable (impossible to inherit or override). The final keyword is useful when you want a variable to always store the same value, like PI (3.14159...).
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