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What are the correct statements on final key word?Select one or more:final method and it cannot be overridden in the subclassFinal is a keyword or reserved word in Java and can be applied to member variables, methods, class and local variables in Java.The final class is complete in nature and it can be sub-classed or inheritedOnce you make a reference final you are not allowed to change that reference and compiler will verify this and raise a compilation error if you try to re-initialized final variables in Java

Question

What are the correct statements on final key word?Select one or more:final method and it cannot be overridden in the subclassFinal is a keyword or reserved word in Java and can be applied to member variables, methods, class and local variables in Java.The final class is complete in nature and it can be sub-classed or inheritedOnce you make a reference final you are not allowed to change that reference and compiler will verify this and raise a compilation error if you try to re-initialized final variables in Java

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Solution

The correct statements about the final keyword in Java are:

  1. A final method cannot be overridden in the subclass. This is because the final keyword makes the method immutable in the sense that it cannot be modified by a subclass.

  2. Final is a keyword or reserved word in Java and can be applied to member variables, methods, class, and local variables in Java. When a variable is declared as final, its value cannot be modified, essentially, a constant.

  3. Once you make a reference final, you are not allowed to change that reference and the compiler will verify this and raise a compilation error if you try to re-initialize final variables in Java. This is because final references cannot be changed once they have been assigned.

The incorrect statement is:

  1. The final class is complete in nature and it can be sub-classed or inherited. This is incorrect because a final class cannot be subclassed or inherited. This means that no other class can extend a final class.

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