Source Code
package MRCWORKLIB;
public class Validate
{
    public void valid_fields(String[] args)
    {
        String strdatex = args[1].replaceAll(",", "");
        String enddatex = args[2].replaceAll(",", "");
        int strdate = Integer.parseInt(strdatex);
        int enddate= Integer.parseInt(enddatex);
        if ((strdatex.compareTo("0") == 0 ) && (enddatex.compareTo("0") == 0 ))
            {
            args[0] = "You have not entered any dates";
            return;
            }
        else if (strdatex.compareTo("0") == 0)
            {
            args[0] ="You must enter a starting date";
            return;
            }
        else if (enddatex.compareTo("0") == 0)
             {
             args[0] = "You must enter an end date";
             return;
             }
         else if(strdate > enddate)
             {
             args[0] = "Starting Date is greater than End Date";
             return;
             }
         else return;
     }
 }