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An immutable arbitrary-precision signed decimal.A value is represented by an
arbitrary-precision "un
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A connection to a URL for reading or writing. For HTTP connections, see
HttpURLConnection for docume
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Uses a one-way hash function to turn an arbitrary number of bytes into a
fixed-length byte sequence.
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HashMap is an implementation of Map. All optional operations are supported.All
elements are permitte
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An int value that may be updated atomically. See the java.util.concurrent.atomic
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