Write a method called variety that returns the number of dis

Write a method called variety that returns the number of distinct values appearing in an array of Strings. For example, if an array called slist contains the values[“abc”, “def”, “abc”, “xyz”, “def”] variety(slist) should return 3.

Solution

import java.util.Arrays;

public class CountDiffArray {

   /**
   * @param slist
   * @return
   */
   public static int variety(String[] slist) {
       int count = 0;

       for (int i = 0; i < slist.length; i++) {
           boolean isDistinct = false;
           for (int j = 0; j < i; j++) {
               if (slist[i] == slist[j]) {
                   isDistinct = true;
                   break;
               }
           }
           if (!isDistinct) {
               count++;
           }
       }

       return count;
   }

   /**
   * @param args
   */
   public static void main(String[] args) {
       String[] slist = { \"abc\", \"def\", \"abc\", \"xyz\", \"def\" };
       System.out.println(Arrays.toString(slist));
       System.out.println(\"Number of distinct elements : \" + variety(slist));
   }
}

OUTPUT:

[abc, def, abc, xyz, def]
Number of distinct elements : 3