How to make list syncho synchronized

Question

i have a list objct and i want to save it in to database as object and want to retrive as object and reuse that object when i required . i am useing this code to save but it yhrow exception like java.io.NotSerializableException: manicdeals.site.mydetail.BasketItem where manicdeals.site.mydetail.BasketItem is my package structure
          public  void createCartHistory(String sessionId,String accountKey,List shoppingCart) throws SQLException, IOException, ClassNotFoundException
                    Connection connection=null;
                    PreparedStatement statement=null;
                    PreparedStatement statement2=null;
                    PreparedStatement statement3=null;
                    PreparedStatement statement4=null;
                    ResultSet rs=null;
                    ResultSet rs2=null;
                    Object obj = null;
                    //shoppingCart=new ArrayList();
                    //for(int i=0;i<shoppingCart.size();i++)
                    //     System.out.println(""+shoppingCart.get(i));
                 // List listArr = Collections.synchronizedList(new ArrayList(shoppingCart));
                    try
                    connection=DBConnect.getConnection();
                    String sql = "insert into shoppingcarthistory(sessionid,accountkey,cartobject)values(?,?,?)";
                    String sqlSelect="select sessionid,accountkey from shoppingcarthistory where sessionid='"+sessionId+"' or accountkey='"+accountKey+"'";
                    //System.out.println("sqlSelect"+sqlSelect);
                    String sqlDelete="delete  from shoppingcarthistory where sessionid='"+sessionId+"'";
                    //System.out.println("sqlDelete"+sqlDelete);
                   connection.setAutoCommit(false);
                    //check for record exist or not
                    statement2=connection.prepareStatement(sqlSelect);
                    rs=statement2.executeQuery();
                    boolean recordExist=false;
                    if(rs.next())
                         recordExist=true;
                    //System.out.println("after select"+recordExist);
                    // end for check record exist
                    // if exist delete
                    // delete if record exist with same session id and accountkey
                    statement3=connection.prepareStatement(sqlDelete);
                    if(recordExist)
                         statement3.executeUpdate();
                    //System.out.println("else for insert");
                    statement=connection.prepareStatement(sql);
                    // convert object to bytes to insert
                    byte[] bytes ;
                    System.out.println("1");
                    ByteArrayOutputStream out = new ByteArrayOutputStream() ;
                    System.out.println("2");
                    ObjectOutputStream objOut = new ObjectOutputStream(out) ;
                    System.out.println("3");
                    System.out.println("shoppingCart"+shoppingCart);
                    try{
                    objOut.writeObject(getSerializeObject(shoppingCart)) ;
                    //objOut.writeObject(shoppingCart) ;                    
                    }catch(Exception e){System.out.println(e);}
                    System.out.println("4");
                    objOut.flush() ;
                    bytes = out.toByteArray() ;
                    objOut.close() ;
                    // end convert object to bytes
                    statement.setString(1,sessionId);
                    statement.setString(2,accountKey);
                    statement.setBytes(3,bytes);
                    System.out.println(statement);
                    statement.executeUpdate();
                    connection.commit();
                    // reading cart object
                    }catch(Exception Ex)
                         ManicLogWriter.println("error in adding session history"+Ex.getMessage());
                    finally
                         DBConnect.closeRS(rs);
                         DBConnect.closeStmt(statement);
                         DBConnect.closeStmt(statement2);
                         DBConnect.closeStmt(statement3);
                         DBConnect.closeCon(connection);
          }createCartHistory method is to used for saving

Answer 1

Collections.synchronizedList
But this has nothing to do with the NotSerializable exception, which is probably thrown because it contains objects that don't implement Serializable.