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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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ArrayList is an implementation of List, backed by an array. All optional
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HashMap is an implementation of Map. All optional operations are supported.All
elements are permitte
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The TimerTask class represents a task to run at a specified time. The task may
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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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