"final" keyword in java - GeeksQuiz

"final" keyword in java - GeeksQuiz
Final variables A final variable can only be assigned once. If the variable is a reference, this means that the variable cannot be re-bound to reference another object.

Note the difference between C++ const variables and Java final variables. const variables in C++ must be assigned a value when declared. For final variables n Java, it is not necessary. A final variable can be assigned value later, but only once.

Final classes A final class cannot be extended (inherited)
Final methods A final method cannot be overridden by subclasses.
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What is final method.

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.

What is java final object

You are always allowed to initialize a final variable. The compiler makes sure that you can do it only once.

Note that calling methods on an object stored in a final variable has nothing to do with the semantics of final. In other words: final is only about the reference itself, and not about the contents of the referenced object.

Final class means the class can not be extended. However, it can extend another non-final class.

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