The type Set is not generic; it cannot be parameterized with arguments K ?

Question

When I use Hashtable or HashMap to get the keySet, it shows the error of "The type Set is not generic; it cannot be parameterized with arguments <K>".
The following is my code:
Hashtable table = new Hashtable();
table.put("A", new Integer(1));
table.put("B", new Integer(2));
Iterator its = table.keySet().iterator(); // <<<<<<<<<<<<<< this line shows the error "The type Set is not generic; it cannot be parameterized with arguments <K>"
How can I solve it? Please help me! I have no idea on it. It works fine in 1.4.
Best regards,
Eric

Answer 1

The original is my codes, please help!
public static List findDlicApp(Date startDate, Date endDate, Connection con) {
          String SQL = getSQL("app.sql");
          String where = getSQL("app.sql.where");
          boolean hasWhere = false;
          if (startDate != null) {
               SQL = SQL + " where d.create_date >= to_date('" + DMSUtil.convertDateToString(startDate) + "', 'yyyy-MM-dd')";
               hasWhere = true;
          if (endDate != null) {
               if (hasWhere) {
                    SQL = SQL + " and to_date(to_char(d.create_date, 'yyyy-mm-dd'), 'yyyy-mm-dd') <= to_date('" + DMSUtil.convertDateToString(endDate) + "', 'yyyy-MM-dd')";
               } else {
                    SQL = SQL + " where to_date(to_char(d.create_date, 'yyyy-mm-dd'), 'yyyy-mm-dd') <= to_date('" + DMSUtil.convertDateToString(endDate) + "', 'yyyy-MM-dd')";
               hasWhere = true;
          if (hasWhere) {          
               SQL = SQL + " and " + where;
          } else {
               SQL = SQL + " where " + where;
          SQL = SQL + " " + getSQL("app.sql.order");
          //System.out.println(SQL);
          //Connection con =  getParaDMConnection("findDlicApp");
          HashMap<String, DlicApp> dlicDocs = new HashMap<String, DlicApp>();
          List result = new ArrayList();
          try {
               Statement stmt = con.createStatement();
               ResultSet rs = stmt.executeQuery(SQL);
               long lastDocID = 0;
               boolean hasStartDate = false;
               while(rs.next()) {
                    long docID = rs.getLong("docID");
                    String docName = rs.getString("docName");
                    String refNo = rs.getString("refNo");
                    java.util.Date createDate = rs.getDate("createDate");
                    String creator = rs.getString("creator");
                    String profileType = rs.getString("profileType");
                    String assunto = rs.getString("assunto");
                    String fromEntity = rs.getString("fromEntity");     
                    String location = getLocation(docID, con);
                    long fieldID = rs.getLong("fieldID");
                    String fieldValue = rs.getString("fValue");
                    DlicApp doc = null;
                    if (dlicDocs.containsKey(String.valueOf(docID))) {
                         doc = (DlicApp)dlicDocs.get(String.valueOf(docID));
                    } else {
                         doc = new DlicApp();
                    doc.setId(docID);
                    doc.setDocName(docName);
                    doc.setReferenceNo(refNo);
                    doc.setCreateDate(createDate);
                    doc.setCreator(creator);
                    doc.setProfileType(profileType);
                    doc.setAssunto(assunto);
                    doc.setFrom(fromEntity);
                    //if (doc.getStartDate() == null) {                    
                    //     doc.setStartDate(createDate);
                    doc.setLocation(location);
                    if (fieldValue != null) {                    
                         if (fieldID == 1114) {
                              doc.setChineseName(fieldValue);
                         if (fieldID == 1115) {
                              doc.setPortugueseName(fieldValue);
                         if (fieldID == 1116) {
                              doc.setApplicationCategory(fieldValue);
                         if (fieldID == 1118) {
                              doc.setStatus(fieldValue);
                         if (fieldID == 1119) {
                              Date d = DMSUtil.parseDate(fieldValue, "yyyy-MM-dd");
                              doc.setStartDate(d);
                              hasStartDate = true;
                         if (fieldID == 1120) {
                              Date d = DMSUtil.parseDate(fieldValue, "yyyy-MM-dd");
                              if (!StringUtils.isEmpty(fieldValue)) {
                                   //System.out.println(docName + ":" + fieldValue + ">>>>>>>>>findDlicApp>>>>>>>>>>>>>>>>>>APP END DATE: " + d);
                                   doc.setEndDate(d);
                    if (docID != lastDocID) {                    
                         doc.setRelatedDocs(findRelatedDoc(docID, con));
                         lastDocID = docID;
                    dlicDocs.put(String.valueOf(docID), doc);
               stmt.close();
               rs.close();
               Iterator<String> its = dlicDocs.keySet().iterator();
               while(its.hasNext()) {
                    String id = (String)its.next();
                    DlicApp a = (DlicApp)dlicDocs.get(id);
                    a.setRelatedDocs(findRelatedDoc(a.getId(), con));
                    dlicDocs.put(id, a);
               result.addAll(dlicDocs.values());
               // take out start date is not in the given period
               int n = 0;
               while(true) {
                    if (n < result.size()) {
                         DlicApp a = (DlicApp)result.get(n);               
                         Date sd = a.getStartDate();
                         if (!isWithin(sd, startDate, endDate)) {
                              result.remove(n);
                         } else {
                              n++;
                    } else {
                         break;
          } catch(Exception e) {
               e.printStackTrace();
          if (result.size() > 0) {
               Collections.sort(result, new DmsDocComparator());
          return result;
     }Edited by: EJP on 13/01/2011 14:41: added code tags for you. Please use them next time.