Count the number of vowels in a string - Java

CountVowels.java

import java.util.*;
class CountVowels
{
     public static void main(String[] args)
     {
          int count = 0;
          char[] vowels = new char[] {'a', 'e', 'i', 'o', 'u'};
          Scanner scn = new Scanner(System.in);
          System.out.print("Enter a string: ");
          String str = scn.nextLine().toLowerCase();
          for (int i = 0; i< str.length(); i++ )
          {
               for (int j = 0; j < 5; j++)
               {
                    if (str.charAt(i) == vowels[j])
                    {
                         count++;
                    }
               }
          }
          if (count > 0)
          {
               System.out.println("Total vowel present in given string : "+count);
          }
          else
               System.out.println("no vowels present in given string.");
     }
}