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Return the contained value, if present, otherwise throw an exception to be
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An exception that indicates a failed JDBC operation. It provides the following
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Collection is the root of the collection hierarchy. It defines operations on
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Note: Do not use this class since it is obsolete. Please use the Map interface
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A plug-in replacement for JDK1.5 java.util.concurrent.ConcurrentHashMap. This
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A counting semaphore. Conceptually, a semaphore maintains a set of permits. Each
#acquire blocks if
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