How can I remove duplicate elements from a given array in java without using collections

Question

I have an array elements like this:

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

I want to remove the duplicate elements from. Searched on the internet

Answer 1

package com.array;
import java.util.*;

class RemoveDuplicatesInArray{

    public static void main(String[] args) {
        Integer[] array = new Integer[10];

        array[0] = 1;
        array[1] = 2;
        array[2] = 3;
        array[3] = 3;
        array[4] = 3;
        array[5] = 3;
        array[6] = 7;
        array[7] = 7;
        array[8] = 9;
        array[9] = 9;
        removeDuplicatesFromArray(array);

    }


    private static void removeDuplicatesFromArray(Integer[] array){
        StringBuffer stringBuffer = new StringBuffer();
         String arrayString =  Arrays.toString(array);
         for(int index =0 ; index <= arrayString.length(); index++){
          try{
              int number = Integer.parseInt(arrayString.charAt(index)+"");
              if(!stringBuffer.toString().contains(number+"")){
              if(stringBuffer.length()!=0)
                  stringBuffer.append(",");
                 stringBuffer.append(number);
              }

          }catch(Exception e){

          }
         }
         String[] stringArray = stringBuffer.toString().split(",");
         array = new Integer[stringArray.length];
         for(int index = 0 ; index < stringArray.length ; index++){
           array[index] = Integer.parseInt(stringArray[index]); 
         }
         System.out.println(Arrays.toString(array));
      }

}