Multiple Inheritance in Java since All classes extend from Object class? [duplicate]

Answer 1

You specifically mention inheriting from Object, but if you are asking about inheritance in general between children and grandchildren, then yes, B will inherit from all predecessors.

public class A{
   public String getAString(){
       return "Hello from A";
   }
 }


public class B extends A {
    public String getBString(){
        return  getAString() + " and Hello from B.";
    }
}


 public class C extends B{
 }

 public class Main{
     public static void main(String[] args){
         C c = new C();
         //                 Inherited from A         Inherited from B
         System.out.println(c.getAString() + "..." + c.getBString());
     }
 }

This gives

Hello from A...Hello from A and Hello from B.

Notice C has no code in the class body. All functionality is being inherited.

Inheriting from Object is a little special in that it is implicit. There is no need to say extends Object on any class -- it's redundant. But the inheritance mechanism is no different.