Class Summary Class Description MultiComparator<T>Comparator that supports multi-level sorting. MultiQueueExecutorExecutor service that allows temporary suspension of execution for a given, task submitting thread. NumberParserUtility class for faster number parsing from "Performant Java programmieren", Hendrik Schreiber, Addison Wesley 2002. ResourceLock<L extends Lock>Allows locking of a given resource. VetoableModificationSet<T>
HashSetthat calls methods before adding or removing elements from its collection.