Importing New Version of the database

Question

Hello. I don't know if this is the right forum for this question but, we are trying to update our test finanical database by importing a copy from our live finanical database that was exported. We log into SVRMGR as SYSTEM/MANAGER and try to start the import, but we can't get the PO, GL objects to drop. We can get the system objects to drop. When we log in as APPS/APPS, the apps objects drop, but we still can't get the other objects to drop.
Do we have to log into each Oracle Financial object (i.e. PO, GL, etc) in order to drop them so we can import updated data? Or are we missing a command or part of a command when we log into SRVMGR in our to have full access to all the database objects? Our system in Oracle 8.0.5 running on Windows NT server. Thanks for your assistance.
David Correia
MIS
NECMSC

Answer 1

Were covariant return types removed from the compiler? I tried compiling this code:
import java.lang.reflect.*;
class Base implements Cloneable {
    public Base clone() { return null; }
class Derived extends Base {
    public Derived clone() { return null; }
public class Generic {
    public static void main(String[] args) throws Exception {
        Method m = Derived.class.getDeclaredMethod("clone", new Class[] { });
        System.out.println(m.getReturnType());
}And got these errors:
Generic.java:4: clone() in Base cannot override clone() in java.lang.Object; att
empting to use incompatible return type
found : Base
required: java.lang.Object
public Base clone() { return null; }
^
Generic.java:8: clone() in Derived cannot override clone() in Base; attempting t
o use incompatible return type
found : Derived
required: Base
public Derived clone() { return null; }
^
2 errors
I think this same program compiled without error with the first version of the generic compiler.