Error in preverifying class

I've written a small class:

import javax.microedition.lcdui.Graphics;

public class Test {

}

I can compile it without error. I typed "java Test" and it is ok. But if I type "preverify Test.class", it said "Error loading class Test.class".

Could someone help?

[302 byte] By [smallsun] at [2007-9-26 3:29:44]