?? share.java
字號(hào):
/**
the share class
*/
import java.util.ArrayList;
public class Share extends AbsSubject
{
private double charge;
public Share()
{
super();
}
/*the following three functions can register the observers*/
public void registerObserver(Observer o)
{
getObserver().add(o);
}
public void removeObserver(Observer o)
{
int i = getObserver().indexOf(o);
if (i >= 0)
{
getObserver().remove(i);
}
}
public void notifyObservers()
{
for (int i = 0; i < getObserver().size(); i++)
{
Observer observer = (Observer)getObserver().get(i);
observer.update(charge);
}
}
/*do update*/
public void doUpdate(double charge)
{
this.charge=charge;
notifyObservers();
}
}
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