Multilevel inheritance

Multilevel inheritance

We discussed a bit about Multilevel inheritance in types of inheritance in java. In this tutorial we will explain multilevel inheritance with the help of  diagram and example program.

It’s pretty clear with the diagram that in Multilevel inheritance there is a concept of grand parent class. If we take the example of above diagram then class C inherits class B and class B inherits class A which means B is a parent class of C and A is a parent class of B. So in this case class C is implicitly inheriting the properties and method of class A along with B that’s what is called multilevel inheritance.

Example :

In this example we have three classes –  Car, Maruti and Maruti800. We have done a setup – class Maruti extends Car and class Maurit800 extends Maurti. With the help of this Multilevel hierarchy setup our Maurti800 class is able to use the methods of both the classes (Car and Maruti).

class Car{                                // class of car
 public Car()    
 {
  System.out.println("Class Car");
 }
 public void vehicleType()
 {
  System.out.println("Vehicle Type: Car");
 }
}
class Maruti extends Car{                 // Maruti class extends car class
 public Maruti()                                 
 {
  System.out.println("Class Maruti");
 }
 public void brand()
 {
  System.out.println("Brand: Maruti");
 }
 public void speed()
 {
  System.out.println("Max: 90Kmph");
 }
}
public class Maruti800 extends Maruti{           //Maruti800 extends Maruti

  public Maruti800()
  {
   System.out.println("Maruti Model: 800");
  }
  public void speed()
  {
   System.out.println("Max: 80Kmph");
  }
  public static void main(String args[])        // calling in main 
  {
   Maruti800 obj=new Maruti800();      // making object having all info. of extends class
   obj.vehicleType();
   obj.brand();
   obj.speed();
  }
}

Output:

Class Car
Class Maruti
Maruti Model: 800
Vehicle Type: Car
Brand: Maruti
Max: 80Kmph