final, finally and finalize in Java

final :

• final is a modifier applicable for classes, methods and variables.If a class is declared as final then we can't extend that class means we can not create child class for that class.
• If a method is declared as final then we can't override that method in the child class.
• If a variable is declared as final then it will become constant and we can't perform re-assignment for that variable.

finally : 

• finally is a block always associated with try catch to maintain clean up code.
• Code in the finally code will always be executed even if an exception is thrown.
• finally block can be used instead of catch block.
• Sample Code : 

       try

       {

            //risky code

       }

       catch(X e)

       {

            //Handling code

       }

       finally

      {

            //clean up code 

      }

finalize : 

• finalize() is a method which is present in the object class.
• Garbage Collector calls the finalize() method just before destroying the object to check which objects are eligible to garbage collect.
• It is used to clean or release the resources i.e.closing database connection.

Important Point to remember :

      finally is meant for clean up activities related to try catch block and finalize() is meant for clean up activities related to object.