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This class generates cryptographically secure pseudo-random numbers. It is best
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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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Vector is an implementation of List, backed by an array and synchronized. All
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Factory and utility methods for Executor, ExecutorService,
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Provides Base64 encoding and decoding as defined by RFC 2045.This class
implements section 6.8. Base
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