Static convenience methods that help a method or constructor check whether it
was invoked correctly
Static utility methods pertaining to String or CharSequence instances.
An object which joins pieces of text (specified as an array, Iterable, varargs
or even a Map) with a
An immutable object that may contain a non-null reference to another object.
Each instance of this t
Helper functions that can operate on any Object.See the Guava User Guide on writing Object methods w