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Provides access to system-related information and resources including standard
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A connection to a URL for reading or writing. For HTTP connections, see
HttpURLConnection for docume
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A connection represents a link from a Java application to a database. All SQL
statements and results
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Collection is the root of the collection hierarchy. It defines operations on
data collections and t
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Factory and utility methods for Executor, ExecutorService,
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JarFile is used to read jar entries and their associated data from jar files.
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