public class StrToLong {
	public static void main (String[] args) {
	   String s = "20000";
	   try {
         long l = Long.parseLong(s.trim());
         System.out.println("long l = " + l);
      } catch (NumberFormatException e) {
         System.out.println("NumberFormatException: " + e.getMessage());
      }
	  }
	  }