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Return the contained value, if present, otherwise throw an exception to be
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A map that has its keys ordered. The sorting is according to either the natural
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General file manipulation utilities. Facilities are provided in the following
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This is the central class in the log4j package. Most logging operations, except
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The GridLayout class is a layout manager that lays out a container's components
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The BufferedImage subclass describes an java.awt.Image with an accessible buffer
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