The Id Component  Commons Id is a component used to generate
identifiers. Several identifier-generation algorithms are
supported by Generators included with the package. The framework
is extensible to support additional implementations.  A utility
class, IdentifierUtils, provides access to singleton generators
and methods to generate identifiers without explicitly creating
a Generator.  For example, to generate a sequence of
Alphanumeric identifiers, starting with ""000000000000001" and
increasing sequentially, you can just repeatedly call  The
underlying Generator used in this case is a static field of the
IdentifierUtils class, exposed publicly as
IdentifierUtils.STRING_ALPHANUMERIC_IDENTIFIER_GENERATOR. The
Generator implementation (like all others in this package) is
synchronized.  You can also create Generators explicitly using
the IdentifierGeneratorFactory abstract factory class. To get an
Identifier Generator instance, first get a concrete factory and
then use the appropriate instance creation method: