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Return the contained value, if present, otherwise throw an exception to be
created by the provided s
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A writable sink for bytes.Most clients will use output streams that write data
to the file system (
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This class provides methods that return pseudo-random values.It is dangerous to
seed Random with the
- Timer (java.util)
Timers schedule one-shot or recurring TimerTask for execution. Prefer
java.util.concurrent.Scheduled
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A plug-in replacement for JDK1.5 java.util.concurrent.ConcurrentHashMap. This
version is based on or
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Defines a general exception a servlet can throw when it encounters difficulty.
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