Explicit List implementation

[Greg Windwall]

Why does the LinkedList class explicitly implement the List interface? It should implicitly implement the interface through the AbstractList class, shouldn't it? Does the "implements List" just serve as a reminder?
Thanks,
Greg
[ December 12, 2002: Message edited by: Greg Windwall ]

[Abu Yoosuf]

It is redundant. I believe it is there for
(i) clarity
(ii) generating the 'complete' javadoc info. So a user can see the implementing interfaces as well as the parent class hierarchy.
Then again, someone may have a different reason for it.
Any way, the following example shows why it is redundant.

public class Test
{
   public static void main(String[] args)
   {
     MyInterface b = new B();  
     MyInterface c = new C();    
   }
}
interface MyInterface
{
   void get();
   void set();  
}
abstract class A implements MyInterface
{
   public void get()
   { 
      //...
   }  
}
class B extends A  
// implements MyInterface
{
    public void set()
   {  
      //...
   }
}
class C extends B 
implements MyInterface 
//implements clause is redundant here
//we could have done without it
//the compiler wouldn't have complained
{
   
}