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A Map is a data structure consisting of a set of keys and values in which each
key is mapped to a si
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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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Factory and utility methods for Executor, ExecutorService,
ScheduledExecutorService, ThreadFactory,
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A reentrant mutual exclusion Lock with the same basic behavior and semantics as
the implicit monitor
- Stream (java.util.stream)
A sequence of elements supporting sequential and parallel aggregate operations.
The following exampl
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A filter is an object that performs filtering tasks on either the request to a
resource (a servlet o
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