8.1-2_Inheriting Object

Question 1

What is the only class that doesn’t have a parent class?

Answer 1

java.lang.Object

Question 2

What happens when you doesn’t extend a specific class?

Answer 2

The compiler automatically adds the syntax ‘extends java.lang.Object’ to the class definition.

public class Zoo { } 
public class Zoo extends java.lang.Object { }

Question 3

What implies that all classes inherit from java.lang.Object?

Answer 3

The result is that every class gains access to any accessible methods in the Object class.

Question 4

What about inheritance with primitives?

Answer 4

primitive types such as int and boolean do not inherit from Object, since they are not classes.
-> Instead use the Wrapper classes for that