Compiler cannot distinguish between the same class name in different packages, when
the ambiguous class name has been imported into this package. Receive error message:
Class name Vector clashes with imported class java.util.Vector

Steps to reproduce:
Compile the attached code

/* Ambiguous class name */

package pkg;
import java.util.*;

public class Vector
{
    private int i;
    public Vector()
    {
       i = 1;
    }
}