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Represents a command that can be executed. Often used to run code in a different
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Thrown when a hostname can not be resolved.
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A charset is a named mapping between Unicode characters and byte sequences.
Every Charset can decode
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A Set is a data structure which does not allow duplicate elements.
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A reentrant mutual exclusion Lock with the same basic behavior and semantics as
the implicit monitor
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This Graphics2D class extends the Graphics class to provide more sophisticated
control overgraphics
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