Help:java.lang.reflect

Question

Dear every one,
I have a class as following:
public class classA implements interfaceA{.....}
,but when I use the class.forName() method to open the classA as following:
Class c=Class.forName("classA");
it generate java.lang.NoClassDefFoundError, could you please tell me why, and
how can solve the problem. Thanks a lot.
Yours Leon

Answer 1

Thank you very much for your reply, but it is not the point , at least not what i want, assumed the 3 classes are following:
//class1: classA.class
public class classA{
     public static void main(String args[]){System.out.println("OK");}
     public void m1(){}
     public String m2(String mst){System.out.println(mst);return mst;}
//class2 : classB.class
public class classB implement Interface1{....}
//class3: atest.class
import java.lang.reflect.*;
public class atest{
public static void main(String args[]){
     try{
     Class a=Class.forName("classA");//it works
     Class a1=Class.forName("classB");//doesn't work
     System.out.println(a.getName());
     System.out.println(a1.getName());
     }catch(Exception e){}
}