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A connection represents a link from a Java application to a database. All SQL
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Collection is the root of the collection hierarchy. It defines operations on
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A TimeUnit represents time durations at a given unit of granularity and provides
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This is the central class in the log4j package. Most logging operations, except
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A collection that associates an ordered pair of keys, called a row key and a
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The Color class is used to encapsulate colors in the default sRGB color space or
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