The Collection is an interface whereas Collections is a utility class in JAVA. The Set, List, and Queue are some of the subinterfaces of Collection interface, a Map interface is also part of the Collections Framework, but it doesn't inherit Collection interface. The important methods of Collection interface are add(), remove(), size(), clear() etc and Collections class contains only static methods like sort(), min(), max(), fill(), copy(), reverse() etc.
Syntax for Collection Interface
public interface Collection<E> extends Iterable<E>
Syntax for Collections class
public class Collections extends Object
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