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import java.util.Collection; import java.util.concurrent.ConcurrentLinkedQueue; public class JavaCollectionIsEmptyExample3 { public static void main(String[] args) { Collection
collection = new ConcurrentLinkedQueue
(); for (int i = 1; i <= 5; i++){ collection.add(i); } if(collection.isEmpty()){ System.out.println("isEmpty() method returns "+collection.isEmpty()); System.out.println("Add some elements because the queue is empty."); } else{ System.out.println("isEmpty() method returns "+collection.isEmpty()); System.out.println("Elements are : "+collection); } } }
Output