4. Object Structures, Aliasing, and Encapsulation
4. Object Structures, Aliasing, and Encapsulation
4. Object Structures, Aliasing, and Encapsulation
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}rep Engine getEngine() { return engine; }void setEngine( rep Engine e){ engine=e; }void go () {if(driver!=null) engine.start();}class Main {void main() {Driver bob = new Driver(); // root ownerCar car = new Car(); // root ownercar.driver = bob;car.go();car.engine.stop();car.getEngine().stop();// fails// fails}}rep Engine e = new rep Engine();car.setEngine(e);// fails13.05.13© A. Poetzsch-Heffter, TU Kaiserslautern44
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