public class TestSteamEngine { public static void main(String arg[]) { SimpleObserverI myObs, myObs2, myAlarmObs, myThermoObs; SteamEngineC myEngine; myEngine = new SteamEngineC(); myObs = new SteamEngineObserverC(myEngine); myObs2 = new SteamEngineObserverC(myEngine); myAlarmObs = new SteamEngineObserverAlarm(myEngine, 50, 128); //myThermoObs = new SteamEngineObserverThermometer(myEngine); for(int i = 30; i <= 150; i += 10) { myEngine.setTemp(i); } } }