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Represents a command that can be executed. Often used to run code in a different
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An immutable arbitrary-precision signed decimal.A value is represented by an
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Calendar is an abstract base class for converting between a Date object and a
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GregorianCalendar is a concrete subclass of Calendarand provides the standard
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Patterns are compiled regular expressions. In many cases, convenience methods
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A generic Abstract Window Toolkit(AWT) container object is a component that can
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