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Wraps either an existing OutputStream or an existing Writerand provides
convenience methods for prin
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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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Calendar is an abstract base class for converting between a Date object and a
set of integer fields
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A legacy iteration interface.New code should use Iterator instead. Iterator
replaces the enumeration
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LinkedHashMap is an implementation of Map that guarantees iteration order. All
optional operations a
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Factory and utility methods for Executor, ExecutorService,
ScheduledExecutorService, ThreadFactory,
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