How does the “final” keyword in Java work?

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In Java we use final keyword with variables to specify its values are not to be changed. But I see that you can change the value in the constructor / methods of the class. Again, if the variable is static then it is a compilation error.

Oct 3, 2018 in Java by Daisy
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2 answers to this question.

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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.

Java has no concept of object immutability; this is achieved by carefully designing the object, and is a far-from-trivial endeavor.

answered Oct 3, 2018 by parth295
• 4,600 points
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A final variable that is created inside the constructor, method or block is known as local final variable. It must be initialized once where it is created. We have declared a final local variable inside the method.

answered Mar 23 by anonymous

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