[Java] Static Binding and Dynamic Binding

Static Binding and Dynamic Binding

1. Binding

- Connecting a method call to the method body is known ad binding

1) static binding(early binding)

2) dynamic binding(late binding)

2. Static binding

- When type of the object is determined at compiled time, is is known as static binding

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

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

3. Dynamic binding

- When type of the object is determined at run-time, it is known as dynamic binding

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

- Object type can't be determinded by the compiler, because the instance of Dog is also an instance of Animal, so Compiler doesn't know its type