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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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An output stream that writes bytes to a file. If the output file exists, it can
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A PriorityQueue holds elements on a priority heap, which orders the elements
according to their natu
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Factory and utility methods for Executor, ExecutorService,
ScheduledExecutorService, ThreadFactory,
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This is the central class in the log4j package. Most logging operations, except
configuration, are d
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The GridLayout class is a layout manager that lays out a container's components
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