Conditional import in Java?

Question

Hi All,
Is some way available to custom import packages? For eg, I have a mock_middleware package used for testing & initial development process. But there is another package called middleware which is being simultaneously developed. I want to set a flag, which when true - one of these package files are imported and flag false, the other package is imported.
Both the packages will have same class, function declarations.
Thanks a ton for any insights.
Regards,
Chandra Mohan

Answer 1

You seem to be using some non-standard terminology (since I assume you want this switch to take effect at runtime).
Importing refers to something like this: import java.io.IOException;
import java.sql.*; Importing has precisely zero effect at runtime. All it does is allow you to not have to specify fully qualified class names. That is I can do this catch (IOException exc) {}
Connection con = getConnection(); instead of having to do catch (java.io.IOException exc) {}
java.sql.Connection con = getConnection(); Now, if you want to first import one class and then the other, you have to change your import statements. If you have packages mock_middleware and middleware, and both have class Foo, then you could, for instance, have precisely one of the following lines uncommented. // import middleware.*;
import mock_middleware.*;
Foo foo = new Foo(); You can't change imports at runtime, and it would make no sense to do so, since importing has no effect at runtime anyway.