quei metodi chi usi sono Deprecated
cioe' caduti in disuso, da non usare

se leggi la documentazione dice:
codice:
  int getHours() 
          Deprecated. As of JDK version 1.1, replaced by Calendar.get(Calendar.HOUR_OF_DAY). 
 int getMinutes() 
          Deprecated. As of JDK version 1.1, replaced by Calendar.get(Calendar.MINUTE). 
 int getSeconds() 
          Deprecated. As of JDK version 1.1, replaced by Calendar.get(Calendar.SECOND).