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Return the contained value, if present, otherwise throw an exception to be
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An output stream that writes bytes to a file. If the output file exists, it can
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Calendar is an abstract base class for converting between a Date object and a
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A plug-in replacement for JDK1.5 java.util.concurrent.ConcurrentHashMap. This
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The Manifest class is used to obtain attribute information for a JarFile and its
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An interface for the creation of Connection objects which represent a connection
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