GoTo in java gibt es nicht... alternative?

[Nicodius]

Code:

  public static void main(String[] args) throws Exception
    { 
      String line; 
      BufferedReader br = new BufferedReader( new InputStreamReader(System.in)); 
      int EingabeSec = 0; 
      TimeMachine2 tm2 = new TimeMachine2(); 
      do 
      { 
            System.out.println("Sekundeneingabe: "); 
            line = br.readLine(); 
            EingabeSec = Integer.parseInt(line); 
            tm2.SetsecondsIN(EingabeSec); 
            tm2.transform(); 
            System.out.println(tm2.GetHours()+" h, " + tm2.GetMinutes() + " m, "+ tm2.GetSeconds() + " s"); 
            System.out.println("nochmal?"); 
            line = br.readLine(); 
      } while (line == "Ja");
    }

was soll da bitteschön falsch sein