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A plug-in replacement for JDK1.5 java.util.concurrent.ConcurrentHashMap. This
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A synchronization aid that allows one or more threads to wait until a set of
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A TimeUnit represents time durations at a given unit of granularity and provides
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This is the central class in the log4j package. Most logging operations, except
configuration, are d
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This is the main interface of a Quartz Scheduler. A Scheduler maintains a registry of org.quartz.Job
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