Method Overloading for null argument

Question

I have added three methods with parameters:

public static  void doSomething(Object obj) {
    System.out.println(\"Object called\");
}

public static  void d         


        

Answer 1

Every class in Java extends Object class.Even Integer class also extends Object. Hence both Object and Integer are considered as Object instance. So when you pass null as a parameter than compiler gets confused that which object method to call i.e. With parameter Object or parameter Integer since they both are object and their reference can be null. But the primitives in java does not extends Object.