Java Programming

Final Keyword   final keyword is used for method, variables and classes variable is constant class does not inherit if we create a final as a variable, it becomes constant, we cannot change the value of final. if we create any final method, we cannot override it. if we create a final class, it cannot extends Continue reading

Abstraction Abstraction     Security Data Hiding Encapsulation Tightly coupled classes Inheritance   Code Reusability Polymorphism Has a relationship   using a abstract class (0% – 100%) to achive abstraction Using interface (100%) abstraction A method without body (no implementation ) is known as abstraction method A method must always be declared in an abstract Continue reading