How to create hierarical level inheritance in java

3.Hierarchical level Inheritance:-
 When more than two classes using only one class properties is called hierarchical level.

class GrandFather

{

public void property1()

{

System.out.println("Full property of Grandfather");

}

}

class Father extends GrandFather

{

public void property2()

{

System.out.println("Property of house");

}

}

class Son extends GrandFather

{

public void property3()

{

System.out.println("Property of car");

}

}

class Main

{

public static void main(String args[])

{

Father f=new Father();

f.property2();

f.property1();

Son s=new Son();

s.property3();

s.property1();

}

}

OUTPUT:-

C:\Users\Satyendra\Desktop>javac Main.java

C:\Users\Satyendra\Desktop>java Main

Property of house

Full property of Grandfather

Property of car

Full property of Grandfather

How to create multi level inheritance in java

2.Multi level Inheritance:-
When more than two classes we use extends from one to another in a chain process.

class Mobile

{

public void nokia()

{

System.out.println("Phone is ringing");

}

}

class Laptop extends Mobile

{

public void acer()

{

System.out.println("Beautiful laptop");

}

}

public class Main extends Laptop

{

public void connect()

{

System.out.println("It connects the both classes");

}

public static void main(String args[])

{

Main m = new Main();

m.nokia();

m.acer();

m.connect();

}

}

OUTPUT:-

C:\Users\Satyendra\Desktop>javac Main.java

C:\Users\Satyendra\Desktop>java Main

Phone is ringing

Beautiful laptop

It connects the both classes

How to create single level inheritance in java

Inheritance:-Inheritance is the process by which one object acquires the properties of another object.

There are 3 types of inheritance in java

1. Single level
2. Multi level
3. Hierarchical level 

1. Single level Inheritance:-
 When class uses another class then we use extends or when class uses inheritance of another class then we use implements.

class Inher{

void mobile(){

System.out.println("Samsung");

}

}

class Main extends Inher{

void laptop(){

System.out.println("Acer");

}

public static void main(String args[]){

Main m=new Main();

m.laptop();

m.mobile();

}

}

OUTPUT:-

C:\Users\Satyendra\Desktop>javac Main.java

C:\Users\Satyendra\Desktop>java Main

Acer

Samsung

How to create method overloading in java

Method overloading:-When multiple methods in a class with same name but different parameters is called a method overloading.

class Over{

void sum(int a,int b){

System.out.println(a+b);

}

void sum(double a,double b){

System.out.println(a+b);

}

public static void main(String args[]){

Over obj=new Over();

obj.sum(11.5,11.5);

obj.sum(5,5);

}

}

OUTPUT:-

C:\Users\Satyendra\Desktop>javac 1.java

C:\Users\Satyendra\Desktop>java Over

23.0

10