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Program to print the duplicate elements of an array. In this program, we need to print the duplicate elements present in the array. This can be done through two loops. The first loop will select an element and the second loop will iteration through the array by comparing the selected element with other elements.
Dec 14, 2023 · Given an array arr of N elements, the task is to find the length of the smallest subarray of the given array that contains at least one duplicate element. A subarray is formed from consecutive elements of an array.
Jan 21, 2019 · There are many methods through which you can find duplicates in array in java. In this post, we will learn to find duplicate elements in array in java using Brute Force method, using Sorting method, using HashSet, using HashMap and using Java 8 Streams. Let’s see them one by one.
Oct 17, 2010 · int[] array = {10, 2, 2, 3, 19, 5, 6, 7, 16, 17, 18, 19}; Set<Integer> duplicates = new HashSet<>(); for (int i = 0; i < array.length - 1; i++) { for (int j = i + 1; j < array.length; j++) { if (array[i] == array[j]) { duplicates.add(array[i]); } } } System.out.println(duplicates);
May 14, 2024 · Let’s create a method to find duplicate values in an array using Java streams and collectors for efficient duplicate detection: public static <T> Set<T> findDuplicateInArrayWithStream(T[] array) { Set<T> seen = new HashSet<>(); return Arrays.stream(array) .filter(val -> !seen.add(val)) .collect(Collectors.toSet()); }
May 4, 2023 · Here are the steps to find duplicate elements in an array using streams and the frequency() method: Create an array of elements. Convert the array to a list using the Arrays.asList() method. Use the stream() method to create a stream from the list.
Apr 22, 2022 · Find and count duplicates in an Arrays : Using Stream.distinct () method. Using Stream.filter () and Collections.frequency () methods. Using Stream.filter () and Set.add () methods. Using Collectors.toMap () method and Method Reference Math::addExact for summation of duplicates. Using Collectors.groupingBy () and Collectors.counting () method s.
