You cannot have two methods in the same class with signatures that only differ by return type. Until the J2SE 5.0 release, it was also true that a class could not override the return type of the methods it inherits from a superclass. In this tip you will learn about a new feature in J2SE […]
Q. How to create Immutable class? Immutable objects are simply objects whose state (the object’s data) does not change after construction. Always construct an object completely, instead of using a no-argument constructor combined with subsequent calls to setXXX methods. Do not provide any methods which can change the state of the object in any way […]