illegalaccessException

[Ankur Jain Kothari]

 /*
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 * and open the template in the editor.
 */

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
/**
 * @author ankur
 */
 public class Ankur extends MIDlet {
     Display d;
    Form f;
    Command sub1,sub2;
    TextField tf1;
    TextField tf2;
 Ankur(){
        d=Display.getDisplay(this);
         f=new Form("");


        tf1 = new TextField("", "", 10, TextField.ANY);
          tf2 = new TextField("", "", 10, TextField.ANY);
        f.append(tf1);
        f.append(tf2);
        sub1 = new Command("sub1", Command.OK, 1);
         sub2 = new Command("sub2", Command.OK, 1);
        tf1.addCommand(sub1);
        tf2.addCommand(sub2);
    }
    public void startApp() {
  
        d.setCurrent(f);
       
    }

    public void pauseApp() {
    }

    public void destroyApp(boolean unconditional) {
    }
}
   

why do i get an illegalaccessexception here? the class is public whereas the constructor is default? anybody please!!!