import java.util.Scanner;
import java.io.File;
import java.io.FileNotFoundException;

/* Java application intended to illustrate the use of the
** CSV_String class.
*/

public class CSV_String_ClientR {

   public static void main(String[] args) throws FileNotFoundException {
      Scanner keyboard = new Scanner(System.in);
      String s = getString("Enter a string:>",keyboard);

      CSV_String X = new CSV_String(s);
      int numFields = X.numberOfFields();
      System.out.println("The CSV string is " + quoted(X.toString()));
      System.out.println("It has " + numFields + " fields.\n");
   
      
      // For each position from -1 to the number of fields, see what
      // the elementAt() method returns.
      for (int p = -1; p <= numFields; p++) {
         System.out.printf("The field at position %d is ", p);
         String fieldVal = X.elementAt(p);
         if (fieldVal == null)
            { System.out.println("null"); }
         else 
            { System.out.println(quoted(fieldVal)); }
      } 
      
      // Now use the "iterator" methods to iterate over the fields
      // in X, printing each one's value.
      System.out.println("\nStarting an iteration...");
      X.reset();
      while (X.hasNext()) {
         System.out.println("The next field is " + quoted(X.next()));
      }
      
      System.out.println("\nDone!");
   }


   /* Prints the given prompt and then reads and returns the full line of
   ** input (as a string) entered by the interactive user.
   */
   public static String getString(String prompt, Scanner input) {
      System.out.print(prompt);
      return input.nextLine();
   }
   
   public static String quoted(String s) {
      String result = s;
      if(s != null) { result = "\"" + s + "\""; }
      return result;
   }
}