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Wraps an existing Writer and buffers the output. Expensive interaction with the
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HashSet is an implementation of a Set. All optional operations (adding and
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A Set is a data structure which does not allow duplicate elements.
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Stack is a Last-In/First-Out(LIFO) data structure which represents a stack of
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TreeSet is an implementation of SortedSet. All optional operations (adding and
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A plug-in replacement for JDK1.5 java.util.concurrent.ConcurrentHashMap. This
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