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Thrown when a file specified by a program cannot be found.
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Provides access to system-related information and resources including standard
input and output. Ena
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A linear collection that supports element insertion and removal at both ends.
The name deque is shor
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A PriorityQueue holds elements on a priority heap, which orders the elements
according to their natu
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Patterns are compiled regular expressions. In many cases, convenience methods
such as String#matches
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A Window object is a top-level window with no borders and no menubar. The
default layout for a windo
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