Upcasting and Downcasting:- (Upcasting and Downcasting ) Java support Run-time polymorphism with the help of method overriding. Method overriding only applicable when the signature (prototype, return type, name, argument) of…
Polymorphism in Java:- Polymorphism in Java is an object-oriented concept which is used to create different from a single resource. The polymorphism can be achieved by two different ways in…
Interface in JAVA:- An interface in Java is very similar to an abstract class. Both cannot be instantiated. It is similar to a class. It is a collection of…
Inheritance Access the resources of the .class file after establish the relation is the concept of inheritance in java. Inheritance is the object-oriented concept which is used to create a…
Aggregation An aggregation is a special form of association. Access the resources of another .class file without creating any relation, that is the concept of Aggregation in java. It represents a HAS-A…
Control Structure in JAVA:- A control structure is a block of a program that analyzes the direction of the program in which to go based on a block. Programming language…
Input from the keyboard:- Followings are the techniques through which we can take input from keyboard. By using scanner class. By using command line argument. By using buffer-reader. By using…
BLOCK IN JAVA:- A block in Java is a group of one or more statements enclosed in braces.A block start with ( { ) and ends with ( } ).…
Factory Method:- If the return type of method is class name then it is known as the Factory method. Private constructor defining a "virtual" constructor. Private Constructor:- The factory constructor declared…
Abstract and Anonymous class:- Abstract class:- If the class name is declared as an abstract keyword it is known as abstract class. An abstract class may or may not contain…
How to create the object of abstract class..? We can create the Object of Abstract class by two different ways. 1)By inheritance Access the resources of the .class file after…
Difference between method and constructor The following are the difference between method and constructor. Method name may or may not be the same as the class name whereas the constructor…