How to inherit "Object" class in Java

[Ipsita]

How "Object" class is inherited by all java class by default though it is not extended?

[dswastik]

Probably JLS says that, and the following code proves the fact.

class ParentTest{

	public static void main(String arg[]){
		ParentTest t=new ParentTest();
		if(t instanceof Object){
			System.out.println("Point is true");
		}
	}
}

[dswastik]

Another way to prove the fact

class ParentTest{
	private void showParentClass(){
		System.out.println("Parent class name is "+getClass().getSuperclass().getName());
	}
	public static void main(String arg[]){
		ParentTest t=new ParentTest();
		t.showParentClass();
	}

[Ipsita]

Yes parent class of any class is Object I know. But I want to know how Object be parent class of all as we don't even extend it?

[Fubarable]

Yes parent class of any class is Object I know. But I want to know how Object be parent class of all as we don't even extend it?

Because that is how Java is defined per the JLS, period (as mentioned already in the first reply to this thread).

Please see: 4.3.2 The Class Object

[dswastik]

Its tough to say how, but that is what java language specification says.

Types, Values, and Variables