// use a flow layout, with components centered, and a 20 pixel
// separation between components
setLayout(new FlowLayout(FlowLayout.CENTER, 20, 20));
// create a temperature
Temperature t = new Temperature();
// create a thermostat
Thermostat th = new Thermostat();
// create a cooler
Cooler c = new Cooler();
// create a boiler
Boiler b = new Boiler();
// add the thermostat, cooler, and boiler to the applet
add(th);
add(c);
add(b);
// make the thermostat a property change listener of the
// temperature object
t.addPropertyChangeListener(th);
// make the cooler a cooling request listener of the
// thermostat object
th.addCoolingRequestListener(c);
// make the boiler a heating request listener of the
// thermostat object
th.addHeatingRequestListener(b);
// make the boiler and cooler vetoable change listeners
// of the thermostat object
th.addVetoableChangeListener(b);
th.addVetoableChangeListener(c);
try
{
// make the temperature object a temperature pulse listener
// of the cooler and boiler objects
c.addTemperaturePulseListener(t);
b.addTemperaturePulseListener(t);
}
catch (java.util.TooManyListenersException e)
{
}
// start the temperature object at 0 degrees
t.setTemperature(0);
