import java.util.*interface Observer {
	public(1)；
}
interface Subject {
	public void Attach(Observer obs);
	public void Detach(Observer obs);
	public void Notify();
	public void setStatus(int staus);
	public int getStatus();
}
class OfficeDoc implements Subject {
	private List < (2) > myObs;
	private String mySubjectName;
	private int m_status;
	public OfficeDoc(String name) {
		mySubjectName = name;
		this.myObs = new Arraylist();
		m_status = 0;
	}
	public void Attach(Observer obs); {
		this.myObs.add(obs);
	}
	public void Detach(Observer obs); {
		this.myObs.remove(obs);
	}
	public void Notify();
        for(Observer obs; this.myObs) {
            (3);
        }
    }
    public void setStatus(int status;) {
        m_status = status;
        System out.println("SetStatus Subject[" + mySubjectName + "]status:" + status);
    }
    public int getStatus() {
        return(m_status);
    }
}
class DocExplorer implements Observer {
	private String myObsName;
	public DocExplorer(String name, (4) sub) {
		myObsName = name;
		sub(5);
	}
	public void update() {
		System.out.println("update observer[" + myObsName + "]");
	}]
class ObserverTest {
	public static void main(String[] args) {
		System.out.println("Hello World!");
		Observer observerA = new DocExplorer("observerA", subjectA);
		subjectA.serStatus(1);
		subjectA.Notify();
	}
}