How to access more than one resultset from jdbc storedprocedures

 
public List executeCallableStatement(CallableStatement colStmt) {
  ResultSet res = null;
  List result = null;
  List multiResult = new ArrayList();
  int count = 1;
  try {
   colStmt.execute();
   while (true) {
    res = colStmt.getResultSet();
    if (res != null){
     result = generateResultList(res);
     count ++;
    }
    if(count > 1){
     multiResult.add(result);
    }
    // Advance and quit if done
    if ((colStmt.getMoreResults() == false)
         && (colStmt.getUpdateCount() == -1))
    {
     if (count == 2) 
     {
      multiResult = result;      
     }
     break;
    }
   }
  } catch (SQLException e) {
   e.printStackTrace();
  }

  return multiResult;
 }

   /**
     * Genarates ArrayList for given result set.
     * @param res
     * @return
     */
    private List generateResultList(ResultSet res){
  Hashtable hashTab = null;
  List resultList = new ArrayList();
  try {
   if (res != null) {
    ResultSetMetaData rsm = res.getMetaData();
    int columnCount = rsm.getColumnCount();
    while (res.next()) {
     hashTab = new Hashtable();
     for (int i = 1; i <= columnCount; i++) {
      String columnName = rsm.getColumnName(i);
      if (rsm.getColumnType(i) == Types.VARCHAR)
       hashTab.put(columnName, res.getString(columnName));
      else if (rsm.getColumnType(i) == Types.INTEGER)
       hashTab.put(columnName, new Integer(res
         .getInt(columnName)));
      else if (rsm.getColumnType(i) == Types.TIMESTAMP)
       hashTab.put(columnName, res
         .getTimestamp(columnName));
      else if (rsm.getColumnType(i) == Types.DECIMAL)
       hashTab.put(columnName, new Float(res
         .getFloat(columnName)));
     }
     resultList.add(hashTab);
    }
   }else{
    return null;
   }
  } catch (SQLException e) {
   e.printStackTrace();
  }

 return resultList;
    }