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Return the contained value, if present, otherwise throw an exception to be
created by the provided s
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A specialized Reader that reads from a file in the file system. All read
requests made by calling me
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A charset is a named mapping between Unicode characters and byte sequences.
Every Charset can decode
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This class generates cryptographically secure pseudo-random numbers. It is best
to invoke SecureRand
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A plug-in replacement for JDK1.5 java.util.concurrent.ConcurrentHashMap. This
version is based on or
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