General Java Questions II

Answer 1: You can t. Theoretically, some classes that implement Enumeration may

also provide some way to get a size, but you d have to know about the more specific

run time type and cast to it... and none of the standard java.util Collections classes

nor Vector or such provide these methods in their Enumeration implementations.

Answer2:  

you can make your own class like this:

import java.util.*;

public class MyEnumeration{

   int size;

   int index = 0;

   Enumeration e;

   public MyEnumeration(Vector v){

      size = v.size();

      e = v.elements();

      index = 0;

   }

   public boolean hasMoreElements(){

      return e.hasMoreElements();

   }

   public Object nextElement(){

      index++;

      return e.nextElement();

   }

   public int size(){

      return size;

   }

   public int getIndex(){

      return index;

   }

}

by Nicolas Delbing and Victor Vishnyakov

 Is there a way to provide values for a Vector in the source code, analogous to

array initializers?

Answer: The Vector class constuctors take no arguments other than Collection (since

JDK 1.2), which is abstract, and since a Vector is a structure whose size can change

dynamically, it s contents can only be initialaized through member methods.

Mike Lundy

How would I add a help file to a java application?

Would it have to be platform specific, or is there a Java api for making help files? 

If so, what is it? 

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