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An immutable arbitrary-precision signed decimal.A value is represented by an
arbitrary-precision "un
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HashMap is an implementation of Map. All optional operations are supported.All
elements are permitte
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A Properties object is a Hashtable where the keys and values must be Strings.
Each property can have
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A Set is a data structure which does not allow duplicate elements.
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Factory and utility methods for Executor, ExecutorService,
ScheduledExecutorService, ThreadFactory,
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Patterns are compiled regular expressions. In many cases, convenience methods
such as String#matches
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