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An immutable arbitrary-precision signed decimal.A value is represented by an
arbitrary-precision "un
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A Uniform Resource Identifier that identifies an abstract or physical resource,
as specified by RFC
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HashMap is an implementation of Map. All optional operations are supported.All
elements are permitte
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A PriorityQueue holds elements on a priority heap, which orders the elements
according to their natu
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Is the value null?
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This Graphics2D class extends the Graphics class to provide more sophisticated
control overgraphics
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