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Return the contained value, if present, otherwise throw an exception to be
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A BufferedInputStream adds functionality to another input stream-namely, the
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A Properties object is a Hashtable where the keys and values must be Strings.
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An object that executes submitted Runnable tasks. This interface provides a way
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Patterns are compiled regular expressions. In many cases, convenience methods
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This is the central class in the log4j package. Most logging operations, except
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A generic Abstract Window Toolkit(AWT) container object is a component that can
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