Number Of Vowels In A String

/* WAP to enter a string and display the number of vowels in it. */
import java.io.*;
class StringQ02
{
public static void main(String arg[])throws IOException
{
 int i, l, vowels;
 String str;
 char ch;

 BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
    System.out.println("Enter a string : ");
    str=br.readLine();
    l = str.length();

    // To count no of vowels
    vowels = 0; 
    for(i=0;i < l;i++){
        ch = str.charAt(i);
        //Count blank spaces
        if(ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u' || 
        ch == 'A' || ch == 'E' || ch == 'I' || ch == 'O' || ch == 'U')
            vowels++;
    }
    System.out.println("No of Vowels: "+vowels);

}//end of main
}//end of class