The standard Java libraries fail to provide enough methods for
manipulation of its core classes. The Commons Lang Component provides
these extra methods. The Commons Lang Component provides a host of
helper utilities for the java.lang API, notably string manipulation
methods, basic numerical methods, object reflection, creation and
serialization, and system properties. Additionally it contains an
inheritable enum type, an exception structure that supports multiple
types of nested exceptions, and a series of utilities dedicated to
helping with building methods, such as hashCode, toString and equals.