Duplicate elements in java 8

 

 This java code will publish the duplicate elements from a given list.   Here we use a 

set and method frequency to get a solution.    But this can achieve multiple ways to get this  

solution using java 8 streams.



import java.util.Arrays;

import java.util.Collections;

import java.util.List;

import java.util.Set;

import java.util.stream.Collectors;



public class DublicateList {


    public static void main(String[] args) {


        // 3, 4, 9 ,1

List<Integer> list = Arrays.asList(5, 3, 4, 1, 3, 7, 2, 9, 9, 4 ,4 ,1);


        Set<Integer> result = findDuplicateByFrequency(list);


        System.out.println("Dublicate elements list");

        result.forEach(System.out::println);

        System.out.println("Duplicate elements list");

         

           

        

    }



public static <T> Set<T> findDuplicateByFrequency(List<T> list) {


        return list.stream().filter(i -> Collections.frequency(list, i) > 1)

                .collect(Collectors.toSet());


    }


}  

Programm output :

Duplicate elements list

1

3

4

9



 

Duplicate elements in java 8 Duplicate  elements  in java 8  Reviewed by Mukesh Jha on 9:38 AM Rating: 5

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