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Represents a command that can be executed. Often used to run code in a different
Thread.
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This exception is thrown when a program attempts to create an URL from an
incorrect specification.
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Provides a client-side TCP socket.
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Calendar is an abstract base class for converting between a Date object and a
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A task that returns a result and may throw an exception. Implementors define a
single method with no
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General IO stream manipulation utilities. This class provides static utility
methods for input/outpu
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