Difference between final keyword, finally block and finalized method in java throught one good example [duplicate]

Answer 1

The java Final keyword can be used in many context.

1. Variable - If you make any variable as final, you cannot change the value of final variable(It will be constant).
2. Method - If you make any method as final, you cannot override it.
3. Class - If you make any class as final, you cannot extend it. read more

The finally Block

The finally block always executes when the try block exits. This ensures that the finally block is executed even if an unexpected exception occurs. Putting cleanup code in a finally block is always a good practice, even when no exceptions are anticipated. read more

finalize method in java is a special method much like main method in java. finalize() is called before Garbage collector reclaim the Object, its last chance for any object to perform cleanup activity

Main issue with finalize method in java is its not guaranteed by JLS that it will be called by Garbage collector or exactly when it will be called, for example an object may wait indefinitely after becoming eligible for garbage collection and before its finalize() method gets called. similarly even after finalize gets called its not guaranteed it will be immediately collected. read more