import java.io.*;

public class Test extends java.applet.Applet {
  
          public void init () {
               if (System.getProperty("java.vendor").indexOf("Netscape") != -1) {
                   netscape.security.PrivilegeManager.enablePrivilege("UniversalFileAccess");
               } else if (System.getProperty("java.vendor").indexOf("Microsoft") != -1)
               com.ms.security.PolicyEngine.assertPermission (com.ms.security.PermissionID.FILEIO);
               try {
                     PrintWriter out = new PrintWriter 
                        (new FileWriter (File.separatorChar+"test.txt"));
                     out.println ("Es funktioniert");
                     out.close ();
                     } catch (IOException ex) { ex.printStackTrace (); }
               }
     }