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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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A specialized Writer that writes to a file in the file system. All write
requests made by calling me
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The TimerTask class represents a task to run at a specified time. The task may
be run once or repeat
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General IO stream manipulation utilities. This class provides static utility
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This Graphics2D class extends the Graphics class to provide more sophisticated
control overgraphics
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