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Return the contained value, if present, otherwise throw an exception to be
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A readable source of bytes.Most clients will use input streams that read data
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Wraps either an existing OutputStream or an existing Writerand provides
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A Uniform Resource Locator that identifies the location of an Internet resource
as specified by RFC
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A PriorityQueue holds elements on a priority heap, which orders the elements
according to their natu
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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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