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Java: Collections Utility Class Methods and Examples

java.util.Collections class inherits Object class. The Collections utility class is used exclusively with static methods that operate on or return collections.

Points to remember

Collections class supports the polymorphic to operate on collections.

Collections class throws a NullPointerException if passing objects are null.

See Also:

Collection Framework Hierarchy

Java : Sort Date Time Object and…

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Java Collections Class

Java Collections class is a utility class present in java.util package. This class consist exclusively of static methods that operate on collections object or returns collections(group of elements). Because it is a utility class , it contains polymorphic algorithms that operate on collections wrappers which returns a new collection backed by a specific collection.

The…

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