General Java Questions I

   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? 

Answer: See JavaHelp at 

http://www.javasoft.com/products/javahelp/

 you create HTML pages for the main text, and add some XML files for a hierarchical

table of contents and a map from TOC tags to relative URLs giving document

locations.

What is a Just In Time(JIT) compiler?

Answer: It is a JVM that compiles Java instructions (called bytecode) into native

machine instructions at run time and then uses this compiled native code when the

corresponding Java code is needed. This eliminates the constant overhead of

interpretation which tradition first generation JVM s used.

Dave Lee

Is there a collection object like the hashmap or hashtable that stores values in an

ordered path? Vector does this but i need the key/value functionality. hashmaps do

not guarantee the order of the objects.

Answer: Take a look at java.util.TreeMap.

Red Black tree based implementation of the SortedMap interface. This class

guarantees that the map will be in ascending key order, sorted according to the

natural order for the key s class (see Comparable), or by the comparator provided at

creation time, depending on which constructor is used.

Note that this implementation is not synchronized. If multiple threads access a map

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