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A concrete subclass of NumberFormat that formats decimal numbers. It has a
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A Properties object is a Hashtable where the keys and values must be Strings.
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TreeSet is an implementation of SortedSet. All optional operations (adding and
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A plug-in replacement for JDK1.5 java.util.concurrent.ConcurrentHashMap. This
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A reentrant mutual exclusion Lock with the same basic behavior and semantics as
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This Graphics2D class extends the Graphics class to provide more sophisticated
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