Class.forName("AClassName") always yields in an exception

Question

Dear Experts
I am trying to get a classname at runtime and Class c = Class.forName always returns an exception
I will appreciate your help in this regard. Anyways the full code is as follows:
interface MyInter
    void accept();
    void display();
class IntegerSorter implements MyInter {
    public void accept()
        System.out.println("IntegerSorter....................");
    public void display()
        System.out.println("Displays IntegerSorter...........");
class StringSorter implements MyInter {
    public void accept()
        System.out.println("StringSorter....................");
    public void display()
        System.out.println("Displays StringSorter.............");
public class Main {
    public static void main(String[] args) {
        Class c=null;
        MyInter m=null;
        String s="IntegerSorter";
        try
             c = Class.forName(s);
        } catch (Exception e1) {
            System.err.println(e1.getMessage());
        try {
            m = (MyInter) c.newInstance();
        } catch (Exception e) {
            System.err.println(e.getMessage());
        m.accept();
        m.display();
}Edited by: standman on Mar 18, 2011 1:41 PM

Answer 1

standman wrote:
I am trying to get a classname at runtime and Class c = Class.forName always returns an exceptionThat's not enough information; which Exception?
Plus, I ran your exact code o my machine, and got absolutely no exception. Are you posting the exact code that demonstrates the problem?
try
c = Class.forName(s);
} catch (Exception e1) {
System.err.println(e1.getMessage());
}As an aside, don't log exceptions like that. Although it looks fine on so small a code, it's way not enough information if you have to debug such a "trace" in a non-trivial program.
Instead log the exception's stack trace ( e1.printStackTrace() ), or use a logging library (for bigger programs).
Regards,
J.