import java.util.StringTokenizer;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io. IOException;

/**
The TimeInput class reads input in minutes:seconds format
with one time input per line and no blank lines.
It is not very robust.

Intended usage is to declare one timeInput object and use
getNextTime( ) to read the next time input from the user.
Obtain the read values of minutes and seconds with getMinutes( )
and getSeconds( ). 

Note that these values are not checked in any way other than 
that they are integers (possibly negative) and were separated
by a colon(:) in the input.

@author Beth Katz, November 2002
*/
public class TimeInput
{
   /**
   builds a new time input object
   */
   public TimeInput( )
   {
      if (in == null) {
         in = new BufferedReader( new InputStreamReader(System.in) );
      }
   }

   /**
   replaces current time input with new value from input
   */
   public void getNextTime( )
   {
      String oneLine;
      StringTokenizer str;

      try {
         oneLine = in.readLine( );
         str = new StringTokenizer(oneLine);
         if (str.countTokens( ) != 1) {
            throw new IOException("Need one input token on a line");
         } else {
            replace(str.nextToken( ));
         }
      }
      catch(IOException e) {
         System.err.println("Input/output error:" + e);
      }
  }

   /**
   replaces current time input with new value from token
   @param token input string of minutes:seconds
   */
   public void replace(String token)
   {
      StringTokenizer timeStr;
      int min = 0, sec = 0;

      try {
         timeStr = new StringTokenizer(token, ":");
         min = Integer.parseInt(timeStr.nextToken( ));
         sec = Integer.parseInt(timeStr.nextToken( ));
      }
      catch(NumberFormatException e) {
         System.err.println("Error: need minutes:seconds");
         min = 0;
         sec = 0;
      }
      finally {
         myMinutes = min;
         mySeconds = sec;
      }
   }

   /**
   returns the number of minutes input
   @return number of minutes
   */
   int getMinutes( )
   {
      return myMinutes;
   }

   /**
   returns the number of seconds input
   @return number of seconds
   */
   int getSeconds( )
   {
      return mySeconds;
   }

   private int myMinutes;
   private int mySeconds;
   private static BufferedReader in;
}