Dec 19, 2024 · Given an integer array arr[], print all distinct elements from this array. The given array may contain duplicates and the output should contain every element only once. Examples: Input: arr[] = {12, 10, 9, 45, 2, 10, 10, 45}Output: {12, 10, 9, 45, 2} Input: arr[] = {1, 2, 3, 4, 5}Output: {1, 2, 3, 4

May 9, 2025 · Java exercises and solution: Write a Java program to find duplicate values in an array of integer values.

Aug 29, 2024 · Given an integer array arr[], check if the array contains any duplicate value. Examples: Input: arr[] = {4, 5, 6, 4} Output: true Explanation: 4 is the duplicate value. Input: arr[] = {1, 2, 3, 4} Output: false Explanation: All values are distinct.

Oct 17, 2010 · public static ArrayList<Integer> duplicate(final int[] zipcodelist) { HashSet<Integer> hs = new HashSet<>(); ArrayList<Integer> al = new ArrayList<>(); for(int element: zipcodelist) { if(hs.add(element)==false) { al.add(element); } } return al; }

Mar 16, 2018 · What you can do, is use a data structure that only contains unique values, Set. In this case we use a HashSet to store all the duplicates. Then you check if the Set contains your value at index i, if it does not then we loop through the array to try and find a duplicate.

Use a Nested Loop to Find Duplicates: Compare each element with every other element in the array to find duplicates. Display the Duplicate Elements: Print the duplicate elements found in the array. Approach 1: Using Nested Loops

The HashSet method is one of the most efficient ways to find duplicates in an array. A HashSet allows unique elements. So, whilst we attempt to add a detail that already exists within the set, we will realise that the factors are duplicates.

Jan 5, 2023 · Learn how to find duplicate elements and their frequency in an array using Java. This guide provides step-by-step instructions and code examples.

Apr 13, 2023 · There are multiple ways to find duplicate elements in an array in Java and we will see three of them in this program. The solution and logic shown in this article are generic and apply to an array of any type e.g. String array or integer array or array of any object.

Jul 5, 2024 · This program demonstrates how to find duplicate elements in an array using Java. The algorithm iterates through the array and uses a HashSet to track seen elements. If an element is found in the HashSet , it is identified as a duplicate.