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Boiler.javaAPI DocExample1730Tue Jun 03 23:54:08 BST 1997BeansBook.Simulator

Boiler

public class Boiler extends TemperatureModifier implements HeatingRequestListener, VetoableChangeListener

Fields Summary
Constructors Summary
public Boiler()

      // a boiler is a temperature modifier that operates at
      // 100 degress celsius
      super(100.0, "BOILER ON", "BOILER OFF",
               Color.red, Color.yellow);
Methods Summary
public voidheatingRequest(ServiceRequestEvent evt)

      // set the Running property based on the value returned
      // by the isStart method from the event
      setRunning(evt.isStart());
public voidvetoableChange(java.beans.PropertyChangeEvent evt)

      // only interested in ComfortTemperature
      if (evt.getPropertyName().equals("ComfortTemperature"))
      {
         // get the proposed temperature
         Double d = (Double)evt.getNewValue();
         
         // veto a temperature over 100 degrees Celsius
         if (d.doubleValue() > 100.0)
         {
            throw new PropertyVetoException("Invalid Comfort Temperature", evt);
         }
      }