Remove duplicates from integer array

Question

I having a problem with coding this:

Write a static method named removeDuplicates that takes as input an array of integers and returns as a result a new

Answer 1

You can also use Google's Guava library and use ImmutableSet do

ImmutableSet.copyOf(myArray).asList();

Answer 2

int[] arrayRemoveDuplicates= Arrays.stream("integerArray").distinct().toArray();
    // print the unique array
    for (int i = 0; i < arrayRemoveDuplicates.length; i++) {
        System.out.println(arrayRemoveDuplicates[i]);
    }

Java.util.streamapi introduced in java 8

Answer 3

import java.util.*;

public class Duplicates {

public static void main(String[] args) {
    // TODO Auto-generated method stub

    int [] myArray  = {1,3,2,4,3,2,3,4,5,6,7,6,5,4,3,4,5,6,76,5,4,3,4,4,5};
    List <Integer> myList = new ArrayList <Integer>();
    myList = removeDuplicates(myArray);

    //Printing Output   
    for (int k=0; k<myList.size();k++)
        System.out.print(" "+ myList.get(k));

}

private static List<Integer> removeDuplicates(int[] myArray) {
    // TODO Auto-generated method stub
    Arrays.sort(myArray);
    List <Integer> myList = new ArrayList <Integer>();
    for (int i=0; i<myArray.length-1; i++){

         if (myArray[i]!= myArray[i+1]){    

                    myList.add(myArray[i]);
            }

    }
    myList.add(myArray[myArray.length-1]);

    return myList;
}

}

Answer 4

try this.

 int numbers[] = {1,2,3,4,1,2,3,4,5,1,2,3,4};

 numbers =  java.util.stream.IntStream.of(numbers).distinct().toArray();

Answer 5

You can do something like this

  public class MyClass {

    public static void main(String args[]) {

        int[] man = {4,56,98,89,78,45,78, 79, 56};

        for (int i = 0; i < man.length; i++)
        {
            for (int j = i+1; j < man.length; j++)
            {
                //check if it is equal
               if (man[i] == man[j])
                {

                     man[j] = man[j] -1;

               //Decrementing size

                   j--;
                }
            }
        }

         //Array without duplicates

        for(int k=0; k<man.length; k++)
        {

            System.out.print(" " + man[k]);
        } 
    }
}