public class SameName
{
    public Object foo ()
    {
        class SingleName
        {
            public String toString ()
            {
                return "foo.SingleName";
            }
        }
        return new SingleName ();
    }
    public Object bar ()
    {
        class SingleName
        {
            public String toString ()
            {
                throw new RuntimeException ("bar.SingleName");
            }
        }
        return new SingleName ();
    }
    public static void main (String[] args)
    {
        System.out.println (new SameName ().foo().toString());
    }
}

cagney@localhost$ ./a.out
Exception in thread "main" java.lang.RuntimeException: bar.SingleName
   at SameName$2$SingleName.toString() (Unknown Source)
   at SameName.main(java.lang.String[]) (Unknown Source)
   at gnu.java.lang.MainThread.call_main() (/usr/lib/libgcj.so.6.0.0)
   at gnu.java.lang.MainThread.run() (/usr/lib/libgcj.so.6.0.0)