Monitor

AskMonitor.java

AskMonitor am = new AskMonitor("Time Vortex Hocus", 2, alarm);
am.setValue(3);
if (am.getValue() > am.getLimit()) 
  am.getAlarm().warn(am.getName() + " too high");

Monitor.java

public class Monitor {
  private int value;
  private int limit;
  private boolean isTooHigh;
  private String name;
  private Alarm alarm;

  public Monitor(String name, int limit, Alarm alarm) {
    this.name = name;
    this.limit = limit;
    this.alarm = alarm;
  }

  public int getValue() {return value;}
  public void setValue(int arg) {value = arg;}
  public int getLimit() {return limit;}
  public String getName()  {return name;}
  public Alarm getAlarm() {return alarm;}
}

TellMonitor.java

...
 public void setValue(int arg) {
    value = arg;
    if (value > limit) alarm.warn(name + " too high");
  }
...

TellMonitor tm = new TellMonitor("Time Vortex Hocus", 2, alarm);
tm.setValue(3);