JavaBeat

Now in section Inheritance mainly in Hiding And Overriding Methods Can we predict the output of the following program? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 [...]

What is Static? static variables and static methods might better have been called perClass variables and methods. They inherited this misleading terminology from C++. They are the opposite of instance variables and methods that work on a particular object. Can we predict the output of the program? 1 2 3 4 5 6 7 8 [...]

Intent of Decorator Design Pattern: Attach additional responsibilities to an object dynamically.Decorators provide a flexible alternative to subclassing for extending functionality.[GoF,p175] Client specified embellishment of a core object by recursively wrapping it. Wrapping a gift,putting it in a box and wrapping the box. Problem:You want to add behavior or state to individual objects at runtime.Inheritance [...]