I have an easy self-signed an applet (done with keytool and the jarsigner):

public class NetAppletLauncher extends JApplet {



    private static final long serialVersionUID = 1L;



    public void init() {

        exec(notepad c:/hello.txt);

    }



    public void exec(String command) {



        try {



            // launch EXE and grab stdin/stdout and stderr

            Process process = Runtime.getRuntime().exec(command);

            //      OutputStream stdin = process.getOutputStream();

            InputStream stderr = process.getErrorStream();

            InputStream stdout = process.getInputStream();



            // write the parms into stdin

//          stdin.write(arguments.getBytes());

//          stdin.flush();

//          stdin.close();



            // clean up if any output in stdout

            String line = ;

            BufferedReader brCleanUp = new BufferedReader(new InputStreamReader(stdout));

            while ((line = brCleanUp.readLine()) != null) {

                //System.out.println ([Stdout]  + line);

            }

            brCleanUp.close();



            // clean up if any output in stderr

            brCleanUp = new BufferedReader(new InputStreamReader(stderr));

            while ((line = brCleanUp.readLine()) != null) {

                //System.out.println ([Stderr]  + line);

            }

            brCleanUp.close();



        } catch (Exception exception) {

            exception.printStackTrace();

        }



    }



}

Basically, what it does, is that it executes 'notepad c:/hello.txt'.

Then i embed the applet in html:

<applet id='applet' name='applet' archive='NetAppletLauncher1.jar' code='src.NetAppletLauncher' width='100' height='100' MAYSCRIPT ></applet>

When i visit the page, JRE starts and asks me if i want to start this applet and if i trust it. I press ok. Then notepad starts - as it should. No problem here.

But then i add this into the HTML-page:

<p class=link onclick=document.applet.exec('calc');>remote desktop2</p>

Now when i press on this text, calc should start - right? But this gives me:

java.security.AccessControlException: access denied (java.io.FilePermission <<ALL FILES>> execute)

    at java.security.AccessControlContext.checkPermission(Unknown Source)

• whats up with this? Why does it give me a security exception now, but it could start notepad before?