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Using Java 8 Stream.distinct() You can use the distinct() method from the Stream API. An unauthenticated remote actor could exploit this vulnerability to take control of an affected system. Finding Distinct Items by Multiple Fields. Using the Stream API. We can use distinct() intermediate operation to remove duplicates Python program to remove Duplicates elements from a List? Java Random Java Random class instance is used to generate a stream of pseudorandom numbers. import static java.util.Comparator.comparing; import static java.util.Comparator.nullsFirst; import static java.util.Comparator.reverseOrder; the methods Using HashSet. Set s can't contain duplicate values, and the Set.add () method returns a boolean value which is the Java Streams has a distinct method which returns a stream with duplicates filtered out. For each element in the stream, group them along with their frequency in a map, using Collectors.groupingBy () method. Then for each element in the collected map, if the frequency of any element is more than one, then this element is a duplicate element. Launchers. The easiest way to find duplicate elements is by adding the elements into a Set. Here, we have used the Stream class to remove duplicate elements from the arraylist. public class The distinct() method return a new Stream without duplicates elements based on the result For more information, see Enabling the shared mode for Talend Studio. We can easily remove the duplicate elements from a List with the standard Java Collections Framework through a Set: ): Set nameSet = new HashSet<>(); List employeesDistinctByName = employees.stream() .filter(e -> nameSet.add(e.getName())) .collect(Collectors.toList()); Now Lets see the implementation using the java program to remove the duplicate entries by using both the methods one by one:-. 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