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Observer Pattern - Main
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public class Main { | |
public static void main(String[] args) { | |
ConcreteObserver1 observer1 = new ConcreteObserver1(); | |
ConcreteObserver2 observer2 = new ConcreteObserver2(); | |
ConcreteSubject1 subject1 = new ConcreteSubject1(); | |
subject1.register(observer1); | |
subject1.register(observer2); | |
subject1.setMessage("Status change 1"); | |
subject1.unregister(observer1); | |
subject1.setMessage("Status change 2"); | |
} | |
} |
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