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What is inheritance in Java?

Nitin Kushwaha 1376 15 Jul 2019

Hi,

    Please tell me about inheritance in java.

java inheritance
Updated 17 Jul 2019
Nitin Kushwaha
Nitin Kushwaha

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2 Answers

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ultra keto 360 17 Jul 2019
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Rahul Roi
Rahul Roi 15 Jul 2019
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Inheritance;- 


Types of Inheritance:-

Inheritance;-

  • When one class is derived from another class.
  • In other words when one object (child) holds all the properties of another object (parent) is called inheritance.
  • extend keyword is used to derive the class properties.

A term used in Inheritance concepts:-

Subclass (child class):- it is a class that inherits another class. It is also called “derived class”.

Superclass (parent class):- it is also class from where derived class inherits the property.

Types of Inheritance:-

1) Single inheritance:-

Rahul Roi

Example- 

class Fruits
{
    void M1()
    {
        System.out.println("M1");
    }
}

class Mango extends Fruits
{
    void M2()        
    {
    System.out.println("M2");
    }
}

class Mask{    
   public static void main(String args[])
   {
    Mango m=new Mango();
    m.M1();
    m.M2(); 
   }
}
Output-
       M1
       M2

2) Multilevel Inheritance:-

     Rahul Roi

Example- 

class Multilevel
{
    void M1()
    {
      System.out.println("M1");
    }
}
class child1 extends Multilevel
{
    void M2(){
        System.out.println("M2");
       }
 }
class child2 extends child1{
    void M3(){
        System.out.println("M3");
         }
}
class child3 extends child2{
    void M4(){
        System.out.println("M4");
        }
}
class More{
    public static void main(String[] args) {
        child3 c=new child3();
        c.M3();
        c.M2();
        c.M1();
        c.M4();
    }
Output-
       M3
       M2
       M1
       M4

3)Multiple Inheritance:-

Rahul Roi

4) Hierarchical Inheritance:-

Rahul Roi

Example- 

 class Flowers
{  
void M1()
  {
    System.out.println("M1");
   }  
}  
  class Dog extends Flowers{  
    void M2()
   {
    System.out.println("M2");}  
    }  
  class Cat extends Flowers{  
    void M3()
  {
    System.out.println("M3");}  
 }  
 class Dav
  {  
    public static void main(String args[])
    {  
  Cat c=new Cat();  
  c.M3();  
  c.M1();  
  Dog d=new Dog();
  d.M2();
  d.M1();
   }
} 
Output-
     M3
     M1
     M2
     M1

5) Hybrid Interface:-

Rahul Roi

Rahul Roi

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