Java-Programs/designPattern/Observer/StudentData.java at master · crg-codes/Java-Programs · GitHub

33 lines (27 loc) · 663 Bytes

package designPattern.Observer;

import java.util.ArrayList;

public class StudentData {

private String message;

private ArrayList<Observer> observers;

public StudentData() {

observers = new ArrayList<>();

}

public void registerObserver(Observer o) {

observers.add(o);

}

public void removeObserver(Observer o) {

observers.remove(o);

}

public void notifyObservers() {

for(int i = 0; i < observers.size(); i++) {

Observer obs = (Observer) observers.get(i);

obs.update(message);

}

public void setMessage(String msg) {

this.message = msg;

}

public String getMessage() {

return this.message;

}

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