Java Programming

Hi,

I am migrating some code from 1.4.2 to 1.5.0 but I am stopped by hashtable issue:

public class MyClass {
private static Hashtable ht = null;
private int id;
private String sID;

public MyClass() {
      ht = new Hashtable();
      id = 0;
    }


public String subscribe(int i, MyObject event) throws Exception {
try {
            id++;
            Integer type = new Integer(event);
            Hashtable group = (Hashtable)ht.get(type);
            if (group == null) {
                group = new Hashtable();
                ht.put(type, group); // 1)
            }
            sID = type.toString() + new Integer(id).toString();
            group.put(sID, event); // 2)
            return sID;
        }
        catch (Exception exc) {
            throw new NestedException(exc, "ERROR: bla bla bla bla");
        }
}

public boolean unSubscribe(String sID) throws Exception {
        try {
            Enumeration g = ht.elements();
            while (g.hasMoreElements()) {
                Hashtable group = (Hashtable)g.nextElement();
                if (group.remove(sID) != null)
                        return true;
            }
            return false;
        }
        catch (Exception exc) {
            throw new NestedException(exc, "ERROR: bla bla bla bla");
        }

    }

1) Type safety: The method put(Object, Object) belongs to the raw type Hashtable. References to generic type Hashtable<K,V> should be parameterized

2) Type safety: The method put(Object, Object) belongs to the raw type Hashtable. References to generic type Hashtable<K,V> should be parameterized


Could you help me with this?
I am really being under pressure with this.

Thanks