Search results
Apr 25, 2023 · The ways for removing duplicate elements from the array: Using extra space. Constant extra space. Using Set. Using Frequency array. Using HashMap. Method 1: (Using extra space) Create a temporary array temp [] to store unique elements. Traverse input array and copy all the unique elements of a [] to temp []. Also, keep count of unique elements.
We can remove duplicate element in an array by 2 ways: using temporary array or using separate index. To remove the duplicate element from array, the array must be in sorted order. If array is not sorted, you can sort it by calling Arrays.sort (arr) method. 1) Remove Duplicate Element in Array using Temporary Array.
May 30, 2024 · Given a sorted array arr [] of size N, the task is to remove the duplicate elements from the array. Examples: Input: arr [] = {2, 2, 2, 2, 2} Output: arr [] = {2} Explanation: All the elements are 2, So only keep one instance of 2. Input: arr [] = {1, 2, 2, 3, 4, 4, 4, 5, 5} Output: arr [] = {1, 2, 3, 4, 5}
Java program to remove duplicates from sorted array. In sorted array, removing duplicate elements is easy compared to the unsorted array. In the sorted array, next element can be either equal or greater/lesser (greater if array is sorted in ascending order, else lesser).
Put all the array values in a set and then convert back to array. Set<Integer> numbersSet = new HashSet<>(Arrays.asList(numbers)); Integer[] uniqueNumbers = numbersSet.toArray(new Integer[0]); Set will eliminate all you duplicates and you don't need to do anything for it. Just put the numbers there.
Removing duplicate elements from an array is a common task in programming. There are multiple ways to achieve this in Java, each with its own benefits and complexity. In this guide, we'll explore different methods to remove duplicates from an array using Java.
Dec 10, 2008 · Here are two methods that allow you to remove duplicates in an ArrayList. removeDuplicate does not maintain the order where as removeDuplicateWithOrder maintains the order with some performance overhead. The removeDuplicate Method: /** List order not maintained **/.
Apr 27, 2024 · To remove duplicate elements from an Array without using a Set in Java, we can follow the below algorithm: Algorithm. Sort the input array using the Arrays. sort method. Initialize a variable j, to keep track of the last index of unique elements. Iterate through the array, starting from the index 1.
Here is what I have so far: import java.util.Scanner; import java.io.*; public class Duplicate { public static void main(String[] args) { Scanner keyboard = new Scanner(System.in); System.out.println("Enter file name: "); String fileName = keyboard.nextLine(); if (fileName.equals("")) {
Apr 2, 2013 · Here's the method I made: public static String [] CompareAndDestroy(String [] array) { String [] newarray = new String [array.length]; for(int i = 0; i<array.length;i++) { for(int j = 0;j<array.length;j++) . { if(array[i].compareTo(array[j])==0) . { } } } return array; } java. arrays. asked Apr 2, 2013 at 4:53. Patrick Jean. 45 1 3 7.
