Inheritance in Java

inheritance implies that simple definition of  inherit attributes and method from one class to another.

Above Picture explains A Class which is Super Class(Parent Class) B Class which is Sub Class(Child Class)

Arrow is indicate as inheritance. When you draw inheritance arrow draw from class B to A class because B class in defend on the Class A.B class is created using A class.

Create a Super Class as Animal.

Animal.java

public class Animal {

public String leg = "leg"; //create instance variables
public String mouth = "mouth";

public void Bark()
{

System.out.println("Bark.........");
}
public void eat()
{

System.out.println("eat");
}

public void sleep()
{
System.out.println("Sleep..........");
}

}

Create a Sub Class as Dog.

Dog.java

public class Dog extends Animal {

    public void dogMethod()
    {
        Bark();
        eat();
        sleep();
        System.out.println(leg);
        System.out.println(mouth);
    }
}

Main.java

public class Main {
   public static void main(String[] args)
   {
      //Create the Sub Object and Access the SuperClass and Subclass methods and attributes
      Dog dog = new Dog();
      dog.dogMethod();
      dog.eat();
      dog.sleep();

      //SuperClass reference Subclass object can create if you create like this you can access only Super class  methods and attributes only
      //Subclass you cannot access

      Animal animal = new Dog();
      animal.eat();
      animal.Bark();
      dog.sleep();

   }

}