// © Copyright 1999, Joseph Bergin. All rights reserved. import java.util.Observable; public class TemperatureModel extends Observable { public double getF(){return temperatureF;} public double getC(){return (temperatureF - 32.0) * 5.0 / 9.0;} public void setF(double tempF) { temperatureF = tempF; setChanged(); notifyObservers(); } public void setC(double tempC) { temperatureF = tempC*9.0/5.0 + 32.0; setChanged(); notifyObservers(); } private double temperatureF = 32.0; }