long can not be deferenced

[Roberto Favaro]

Can anyone help me avoid my error.Long cannot be deferenced. OrderId must be of type long

long orderId = o.getOrderId() ;
if (orderId.length() > 0)// orderId already allocated, so exists already
return 0 ;// prevents creating the same order twice.

[Paul Sturrock]

Are you sure that is the code that is causing the error? What you've posted won't compile, but for a different reason than your error.

[Roberto Favaro]

I have a huge dao which is talking to a database.I want to check if the id exists but the .length() method is the problem as the id (type long) cannot be deferenced

[Paul Sturrock]

Two problems:

long is a primitive type.

The type Long does not have a length() method.

[Roberto Favaro]

Thank you.Is there another way to write this without having to change the type

if (orderId.length() > 0)// orderId already allocated, so exists already
return 0 ;// prevents creating the same order twice.

[Paul Sturrock]

I dunno, its hard to understand what you are trying to do. What it looks like you might be trying to do is see if a value has been assigned to orderId and if it has been return 0. Is that right?

[Roberto Favaro]

Yes......I changed my code to use a primaryKey generator to generate a unique Id and removed the need for a check.Thank you for ure help