The CLDC java.util package contains the most frequently used classes from the J2SE java.util package. These include four of the collections classes -- actually three classes and one interface -- as well as date/time and utility classes.

The java.util collections classes supported by CLDC are:

• Enumeration -- An interface that allows the calling routine to iterate through a collection of items, one at a time.
  
  
• Hashtable -- Implements a hashtable, which maps keys to values.
  
  
• Stack -- Represents a last-in-first-out (LIFO) collection or stack of objects.
  
  
• Vector -- Represents a resizable "array," or vector, of objects.