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Return the contained value, if present, otherwise throw an exception to be
created by the provided s
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HashMap is an implementation of Map. All optional operations are supported.All
elements are permitte
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A TimeUnit represents time durations at a given unit of granularity and provides
utility methods to
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A reentrant mutual exclusion Lock with the same basic behavior and semantics as
the implicit monitor
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The Color class is used to encapsulate colors in the default sRGB color space or
colors in arbitrary
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