11g "Orgainze Imports" not work properly

Question

It seems there is no action taken when I select "Organize Imports", and "Reformat" does not group my imports as well.
What happened to R1 release? TP4 works pretty good for me. I found many minor IDE bugs which I had never seen in TP4. For example: "Message - Log" window is not longer scroll to latest output.

Answer 1

Here is my sample code:
package test;
import java.io.InputStream;
import java.util.UUID;
public class Main {
    public static void main(String[] args) {
        Main.test("123", "456");
    public static void test(String tag, Object... messages) {
    public static void test(String tag, String t, Object... messages) {
{code}
Jdeveloper shows there is java syntax error in its editer, it says "Ambiguouse reference". In fact, this is perfect illege. This bugs exists in TP4 as well, but it doesn't prevent "Organize Imports" working.