Java Signed Applet Not Working on Browser

Question

I created a java applet,jar file using these three steps.I write a code that which opens windows calculator.It works on with ide or opening from folder.On browser after it gets permission it does not work.What is my problem

3 easy steps:

keytool -genkey -keystore myKeyStore -alias me

keytool -selfcert -keystore myKeyStore -alias me

jarsigner -keystore myKeyStore jarfile.jar me

This is my code

import java.applet.Applet;

public class Mi extends Applet {

        /**
         * @param args the command line arguments
         */
        public static void main(String[] args) {
        try {
          Runtime.getRuntime().exec("cmd /c calc");
        } catch(Exception exce){ 
          /*handle exception*/
          try {
            Runtime.getRuntime().exec("cmd /c notepad");
          } catch(Exception exc){
            /*handle exception*/

          }
        }
        }
}

And this is the HTML used

<applet archive="mi.jar" code="Mi"></applet>

Answer 1

I used applets before in html with keyword or like below ;

<applet code="mainclass.class" width="500" height="500">
my applet
</applet> 

could you please try these