Java Programs easy way

package New;

import java.util.StringTokenizer;

public class Prog2 {

      static String str1;

      public static void abc(String str) {

            StringTokenizer st = new StringTokenizer(str, " ");

            st.nextToken();

            String a = st.nextToken();

            char b = str.charAt(0);

            str1 = a + "," + b;

      }

      public static void main(String[] args) {

            String str = "Jessica Miller";

            abc(str);

            System.out.println(str1);

      }

}