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HashSet is an implementation of a Set. All optional operations (adding and
removing) are supported.
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An ordered collection (also known as a sequence). The user of this interface has
precise control ove
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A parser that parses a text string of primitive types and strings with the help
of regular expressio
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An object that executes submitted Runnable tasks. This interface provides a way
of decoupling task s
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Factory and utility methods for Executor, ExecutorService,
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A generic Abstract Window Toolkit(AWT) container object is a component that can
contain other AWT co
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