错误: 找不到或无法加载主类 net.mindview.atunit.AnUnit,求大师帮忙

[gangxigangxi]

package Chapter20;
import net.mindview.atunit.*;
import net.mindview.util.*;

public class AtUnitExample1 {
public String methodOne(){
return "this is methodOne";
}
public int methodTwo(){
System.out.println("this is methodTwo");
return 2;
}
@Test boolean methodOneTest(){
return methodOne().equals("this is methodOne");
}
@Test boolean m2(){
return methodTwo() == 2;
}
@Test private boolean m3(){
return true;
}
@Test boolean failureTest(){
return false;
}
@Test boolean anotherDisappointment(){
return false;
}
public static void main(String[] args)throws Exception{
OSExecute.command("java net.mindview.atunit.AnUnit AtUnitExample1");

}

}