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An immutable arbitrary-precision signed decimal.A value is represented by an
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This exception is thrown when a program attempts to create an URL from an
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A connection to a URL for reading or writing. For HTTP connections, see
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This class provides methods that return pseudo-random values.It is dangerous to
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A synchronization aid that allows one or more threads to wait until a set of
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An Executor that provides methods to manage termination and methods that can
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