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This class generates cryptographically secure pseudo-random numbers. It is best
to invoke SecureRand
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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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An iterator over a sequence of objects, such as a collection.If a collection has
been changed since
- Queue (java.util)
A collection designed for holding elements prior to processing. Besides basic
java.util.Collection o
- Semaphore (java.util.concurrent)
A counting semaphore. Conceptually, a semaphore maintains a set of permits. Each
#acquire blocks if
- Pattern (java.util.regex)
Patterns are compiled regular expressions. In many cases, convenience methods
such as String#matches
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