public class CriticalAlarmObserver implements SimpleObserverI {
    SteamEngineC myEngine;
    int criticalTemp;

    public CriticalAlarmObserver(SteamEngineC engine, int critical) {
        myEngine = engine;
        criticalTemp = critical;
        myEngine.add(this);
    }

    @Override
    public void update() {
        if (myEngine.getTemp() >= criticalTemp) {
            System.out.println("Critical temperature reached, shutting down...");
            System.exit(0);
        }
    }
}