A class variable is visible to and shared by all instances of a class. How would...

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A class variable is visible to and shared by all instances of aclass. How would such a variable be used in an application?
Describe the difference between abstract classes and concreteclasses, giving an example of each.
Explain how data are encapsulated and information is hidden inJava?
Explain the difference between a class and an interface in Java,using at least one example.

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A class variable is visible to and shared by all instances of a class How would such a variable be used in an application Instance variables These variables belong to the instance of a class thus an object And every instance of that class object has its own copy of that variable Changes made to the variable dont reflect in other instances of that class public class Product public int Barcode Class variables These are also known as static member variables and theres only one copy of that variable that is shared with all instances of that class If changes are made to that variable all other instances will see the effect of the changes public class Product public static int Barcode Describe the difference between abstract classes and concrete classes giving an example of each Abstract Class An abstract class is a type of class in Java that is declared by the abstract keyword An abstract class See Answer

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