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Thread: Removing duplicates from an Array

  1. #1
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    Default Removing duplicates from an Array

    I've been trying to figure this out.

    package eliminatingduplicates;
     
    import java.io.IOException;
    import java.util.Arrays;
    import java.util.Random;
    import java.util.Scanner;
     
    /**
     * Name: Bilal Hasan
     * Course: CS 1337
     * Section: 501
     * Date:
     * IDE: NetBeans 7.0.1
     * Operating System: Ubuntu 11.10
     */
     
    /*
     *
     * Description: To eliminate duplicates in an array
     */
    public class EliminatingDuplicates {
     
        public static void main(String[] args) throws IOException
        {
            Scanner keyboard = new Scanner (System.in);
            Random rand = new Random ();
     
            int []array = {1,2,3,4,4,3,2,2,3,4};
                    //new int [10];
     
            /*for (int i = 0; i < array.length; i++) {
                System.out.print("Enter integer " + (i+1) + ": ");
                array[i] = keyboard.nextInt();
     
            }*/
     
            Arrays.sort(array);
     
            int []duplicateNumbers = eliminateDuplicates(array);
            int[]count = new int[10];
     
            for (int i=0; i < duplicateNumbers.length-1; i++) {
     
                for (int j = i+1; j < duplicateNumbers.length; j++) {
     
                if (duplicateNumbers[i] == duplicateNumbers[j] && duplicateNumbers[i] != 0 && j != i)
                {
                    System.out.println("Duplicate numbers are: " + duplicateNumbers[i]);
                }
     
                }  
            }
     
     
        }
     
        //////////////////////////////////////////////////////
     
        public static int[] eliminateDuplicates(int []numbers)
        {
            int []duplicates = new int [10];
            int j = 0;
     
            for (int i = 0; i < numbers.length-1; i++) {
                    for (int l = i+1; l < numbers.length; l++)
                {
                    if (duplicates [i] == duplicates [l] && l != i)
                                {
                                    duplicates[j] = numbers[i];
                                    System.out.println(duplicates[j]);
                                    j++;
     
                                }
                }
            }
     
         return duplicates;   
        }//end eliminate dupe method
    }

    I definitely need to be pointed in the right direction.


  2. #2
    Member snowguy13's Avatar
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    Default Re: Removing duplicates from an Array

    Check the Set interface out; I bet it will be helpful.
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