java applet AccessControlException in 3rd party library -

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I am using a 3rd party library (jar) in my Java applet and I am getting this error: / p> 

  java.security.AccessControlException: access denied to java.security.AccessControlContext.checkPermission (unknown source) at java.security.AccessController (read "java.util.PropertyPermission" "*" ", write ") .checkPermission (unknown source) JavaklangkSecurityManagerkcheckPermission (unknown source java.lang.SecurityManager.checkPropertiesAccess on java.lang.System.getProperties on Sfs2xkclientkcoreksockets) (unknown source) (unknown Source) .TCPSocketLayer.initNetty (TCP) SocketLayer.java:63) at sfs2x.client.core.sockets.TCPSocketLayer. & Lt; Init & gt; Sfs2x.client.bitswarm.BitSwarmClient.init at (TCPSocketLayer.java:59) (BitSwarmClient.java:90). Init & gt; On bfwd.RedemptionOnline.Client.RedemptionOnlineApplet.init (SmartFox.java:127) (RedemptionOnlineApplet.java:29) sfs2x.client.SmartFox.initialize (SmartFox.java:148) is sfs2x.client.SmartFox com on & lt .sun.deploy.uitoolkit.impl.awt.AWTAppletAdapter.init (unknown source) sun.plugin2.applet.Plugin2Manager $ AppletExecutionRunnable.run (unknown source JavaklangkThreadkrun) (unknown source) at   
 I'm testing it on my development server and am trying to connect to the local host. Why am I getting this error now, and how will I stop it in the future?  
 OK, I am also self-signed on my jar, yet it comes with this error.   
  
  sfs2x.client.core.sockets.TCPSocketLayer.initNetty (TCPSocketLayer.java:63) On   
 A game server looks like a TCP / IP server are trying to run the game server on the client side? I'm not sure that your webpage visitors are ever happy with it. What is the functional requirement after all? Are you considering employing your webserver?  
 However, for this to work, you need an applet. Unsigned applets have very restrictive security rules (otherwise it would be easy to mention the entire "my document" and send it to the server, for example ) In fact, you have to send your code to some RSA signing companies and they need to review the code and get some RSA certificates back, which The offer with your applet to let your customers know that it is reliable software.  
 Also sign your applet on a homemade certification which is valid for only 6 months. But the applet will be loaded when the protector's warning is received; End user is asked for confirmation if this is actually a reliable software and it can be executed. You still applets main  init ()  needs a wrap inside the  
  public void Init () {AccessController.doPrivileged (new Praiveted action & lt; Zero & Gt; () {@ Override Public Wide Run ()) {// Place your original Init here.}}); }

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