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An output stream that writes bytes to a file. If the output file exists, it can
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This class contains various methods for manipulating arrays (such as sorting and
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Collection is the root of the collection hierarchy. It defines operations on
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TreeSet is an implementation of SortedSet. All optional operations (adding and
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A counting semaphore. Conceptually, a semaphore maintains a set of permits. Each
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A reentrant mutual exclusion Lock with the same basic behavior and semantics as
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