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package com.jpa1.jpa1;

import java.util.ArrayList;

import java.util.List;

public class Value {

List<ValueListener> listeners = new ArrayList<>();

private int value;

public Value(int value) {

this.value = value;

}

public void setValue(int value) {

this.value = value;

notifyListeners();

}

public int getValue() {

return value;

}

void addListener(ValueListener listener) {

listeners.add(listener);

}

void removeListener(ValueListener listener) {

listeners.remove(listener);

}

private void notifyListeners() {

listeners.forEach(listener -> listener.valueChanged(new ValueChangedEvent(this)));

}

}