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Return the contained value, if present, otherwise throw an exception to be
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ObjectMapper provides functionality for reading and writing JSON, either to and
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Thrown when a program encounters the end of a file or stream during an input
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A controller for the selection of SelectableChannel objects. Selectable channels
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This class contains various methods for manipulating arrays (such as sorting and
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A border layout lays out a container, arranging and resizing its components to
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