Inheritance-Java oops concepts-Single Inheritance

single inheritance in java with example programs 

Inheritance

Inheritance means one class acquiring the properties of another class

this can be also called as parent child, that means child class acquire the

properties(accessing variables and methods) of parent class. Parent class also known as

super class(or base class) and child class known as sub class(or derived class)

Implementing inheritance concept we will use the extends keyword

Single inheritance 

single inheritance in java program with output

Single inheritance means only one base class and one derived class.

Java single inheritance Sample program

single inheritance in java example program

  class Main1

{

public static void main(String args[])

{

ChildExample obj=new ChildExample();

obj.display();

System.out.println("Age is :"+obj.age);

obj.display1();

System.out.println("Age is :"+obj.age1);

}

}

  class ParentExample

{

int age=60;

void display()

{

  System.out.println("This is parent class example");

}

}

  class ChildExample extends ParentExample

{

int age1=18;

void display1()

{

  System.out.println("This is child class example");

}}

advantages of inheritance in java with example

Here three classes are created

Here the child class is inherited,in order to inherit the child class

to the parent class we have  using the keyword extends

Then, save the main method class with the 'class name.java'

Here I have given the class name as Main1

In the other two classes, the child class is attached

to the parent class by using extends keyword

Implementing the inheritance just create child class object only.

through this object we have accessing both parent and child class properties

By using child class objects we can access variables and methods of parent class,

and there is no need to create separate objects for parent class.

This is one of the advantages of the inheritance concept.

In the absence of inheritance we have to  create two objects

one is child and another one is parent but in order to access

variables and methods of child and  parent class Just created

the child class object only.

Multilevel Inheritance in java