A couple of methods related to enumerations that might be useful.
This class should probably disappear once the required JDK is set to 1.2
instead of 1.1.
creates an enumeration from an array of enumeration. The created enumeration
will sequentially enumerate over all elements of each enumeration and skip
null enumeration elements in the array.
Parameters: enums - the array of enumerations. the enumeration over the array of enumerations.