The final Java package, java.util, contains a collection of utility classes. The java.util package also defines the Enumeration interface which provides a protocol for classes to count through a set of values.
Date Use the Date class to create and manipulate calendar dates in a system-independent fashion.
StringTokenizer This class converts a String of text into its tokens. This class implements persistent properties. This class is used by the System class to implement System properties. When an Observable object changes it notifies all of its Observers of the change. The Random class implements a random-number generator.