Inheritance, Packages and Interfaces | Object Oriented Programming
Subject and UNIT: Object Oriented Programming: Unit II: Inheritance, Packages and Interfaces
Inheritance is a mechanism in which the derived class borrows the properties of the base class.
Definition, Concept, Syntax, Implementation, Example Java Programs
Subject and UNIT: Object Oriented Programming: Unit II: Inheritance, Packages and Interfaces
Multiple inheritance is a mechanism in which the child class inherits the properties from more than one parent classes.
with Example Java Programs
Subject and UNIT: Object Oriented Programming: Unit II: Inheritance, Packages and Interfaces
The interface is a powerful tool. The same interface can be used by different classes for some method. Then this method can be implemented by each class in its own way.
with Example Java Programs
Subject and UNIT: Object Oriented Programming: Unit II: Inheritance, Packages and Interfaces
It is necessary to create a class for every interface.The class must be defined in the following form while using the interface
Object Oriented Programming
Subject and UNIT: Object Oriented Programming: Unit II: Inheritance, Packages and Interfaces
The access_modifier specifies the whether the interface is public or not. If the access specifier is not specified for an interface then that interface will be accessible to all the classes present in that package only.
Purpose, Definition, Importance, Creating, Accessing, Importing, Example Java Programs
Subject and UNIT: Object Oriented Programming: Unit II: Inheritance, Packages and Interfaces
In Java, packages are used to achieve the code reusability. That means, the classes from other programs can be easily used by a class without physically copying it to current location.
Definition, Concept, Syntax | Interfaces
Subject and UNIT: Object Oriented Programming: Unit II: Inheritance, Packages and Interfaces
Java has a facility of automatic garbage collection. Hence even though we allocate the memory and then forget to deallocate it then the objects that are no longer is used get freed.
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Subject and UNIT: Object Oriented Programming: Unit II: Inheritance, Packages and Interfaces
A variable can be declared as final. If a particular variable is declared as final then it cannot be modified further. The final variable is always a constant.
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Subject and UNIT: Object Oriented Programming: Unit II: Inheritance, Packages and Interfaces
In inheritance hierarchy, the superclass is very general and less specific. This class does nothing but only specifies the member functions that can be used in hierarchy. Such a class is called abstract class.
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Subject and UNIT: Object Oriented Programming: Unit II: Inheritance, Packages and Interfaces
Basic concept: Polymorphism is a mechanism which allows to have many forms of the method having the same name.
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Subject and UNIT: Object Oriented Programming: Unit II: Inheritance, Packages and Interfaces
Method overriding is a mechanism in which a subclass inherits the methods of superclass and sometimes the subclass modifies the implementation of a method defined in superclass.
Syntax with Example Java Programs
Subject and UNIT: Object Oriented Programming: Unit II: Inheritance, Packages and Interfaces
Super is a keyword used to access the immediate parent class from subclass. There are three ways by which the keyword super is used.