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An output stream that writes bytes to a file. If the output file exists, it can
be replaced or appen
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GregorianCalendar is a concrete subclass of Calendarand provides the standard
calendar used by most
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A map that has its keys ordered. The sorting is according to either the natural
ordering of its keys
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Stack is a Last-In/First-Out(LIFO) data structure which represents a stack of
objects. It enables u
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