DynamicBinding.md

layout	title	parent	nav_order
default	Dynamic Binding	Polymorphism	6

Static Binding and Dynamic Binding

Connecting a method call to the method body is known as binding.

There are two types of binding

1- Static Binding (also known as Early Binding). 2- Dynamic Binding (also known as Late Binding).

---

Understanding Type

Let's understand the type of instance.

1) variables have a type

Each variable has a type, it may be primitive and non-primitive.

 int data=30;  

Here data variable is a type of int.

2) References have a type

class Dog{  
 public static void main(String args[]){  
  Dog d1;//Here d1 is a type of Dog  
 }  
}  

3) Objects have a type

An object is an instance of particular java class,but it is also an instance of its superclass.

class Animal{}  
  
class Dog extends Animal{  
 public static void main(String args[]){  
  Dog d1=new Dog();  
 }  
} 

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static binding

When type of the object is determined at compiled time(by the compiler), it is known as static binding.

If there is any private, final or static method in a class, there is static binding.

Example of static binding

    class Dog{  
     private void eat(){System.out.println("dog is eating...");}  
      
     public static void main(String args[]){  
      Dog d1=new Dog();  
      d1.eat();  
     }  
    }  

Dynamic binding

    class Animal{  
     void eat(){System.out.println("animal is eating...");}  
    }  
      
    class Dog extends Animal{  
     void eat(){System.out.println("dog is eating...");}  
      
     public static void main(String args[]){  
      Animal a=new Dog();  
      a.eat();  
     }  
    }  

Output:dog is eating...