Applet error

Troubleshooting General Help
1

I want to make an applet, so I followed this example:



http://www.jmonkeyengine.com/wiki/doku.php?id=writing_a_jme_applet





I use the IDE Netbeans, the name of my project is Applet2, I created a package named applet  and finally the name of my class is AppletJme.java. This the code of my html


<applet
    code="Applet2.applet.AppletJme"
alt="Nothing"
width="800"
  height="600"
archive="Applet2.jar,lwjgl.jar,lwjgl_util_applet.jar,natives.jar,jme.jar,jme-awt.jar"
   title="jMonkey" >
   <param name="useAppletCanvasSize" value="true"/>
</applet>




And it doesn
2

It looks like the name of the package is incorrect. I haven't used NetBeans in years, but most IDEs don't prefix packages with the name of the project, so the line in your HTML should probably just be:


code="applet.AppletJme"

3

I think that last line of code did something, now this my code for the html archive:


<applet
    code="applet.AppletJme"
   alt="Nothing"
   width="800"
    height="600"
   archive="Applet2.jar,lwjgl.jar,lwjgl_util_applet.jar,natives.jar,jme.jar,jme-awt.jar,jmetest.jar"
   title="jMonkey" >
   <param name="useAppletCanvasSize" value="true"/>



And now this are the errors I get :


java.security.AccessControlException: access denied (java.util.PropertyPermission java.io.tmpdir read)
   at java.security.AccessControlContext.checkPermission(Unknown Source)
   at java.security.AccessController.checkPermission(Unknown Source)
   at java.lang.SecurityManager.checkPermission(Unknown Source)
   at java.lang.SecurityManager.checkPropertyAccess(Unknown Source)
   at java.lang.System.getProperty(Unknown Source)
   at org.lwjgl.util.applet.LWJGLInstaller$7.run(LWJGLInstaller.java:309)
   at java.security.AccessController.doPrivileged(Native Method)
   at org.lwjgl.util.applet.LWJGLInstaller.uninstall(LWJGLInstaller.java:307)
   at org.lwjgl.util.applet.LWJGLInstaller.tempInstall(LWJGLInstaller.java:136)
   at com.jme.system.lwjgl.LWJGLSystemProvider.installLibs(Unknown Source)
   at com.jmex.awt.applet.SimpleJMEApplet.init(Unknown Source)
   at sun.applet.AppletPanel.run(Unknown Source)
   at java.lang.Thread.run(Unknown Source)
com.jme.system.JmeException: Could not install lwjgl libs! java.security.AccessControlException: access denied (java.util.PropertyPermission java.io.tmpdir read)
   at com.jme.system.lwjgl.LWJGLSystemProvider.installLibs(Unknown Source)
   at com.jmex.awt.applet.SimpleJMEApplet.init(Unknown Source)
   at sun.applet.AppletPanel.run(Unknown Source)
   at java.lang.Thread.run(Unknown Source)
java.security.AccessControlException: access denied (java.util.logging.LoggingPermission control)
   at java.security.AccessControlContext.checkPermission(Unknown Source)
   at java.security.AccessController.checkPermission(Unknown Source)
   at java.lang.SecurityManager.checkPermission(Unknown Source)
   at java.util.logging.LogManager.checkAccess(Unknown Source)
   at java.util.logging.Logger.checkAccess(Unknown Source)
   at java.util.logging.Logger.setLevel(Unknown Source)
   at com.jme.util.LoggingSystem.loggerOn(Unknown Source)
   at com.jme.util.LoggingSystem.<init>(Unknown Source)
   at com.jme.util.LoggingSystem.getLogger(Unknown Source)
   at com.jme.system.lwjgl.LWJGLDisplaySystem.<init>(Unknown Source)
   at com.jme.system.lwjgl.LWJGLSystemProvider.getDisplaySystem(Unknown Source)
   at com.jme.system.DisplaySystem.getDisplaySystem(Unknown Source)
   at com.jmex.awt.applet.SimpleJMEApplet.init(Unknown Source)
   at sun.applet.AppletPanel.run(Unknown Source)
   at java.lang.Thread.run(Unknown Source)





Can somebody know something about it?
4

You may need to sign your applet's binaries for it to work.

5

Thanks for your help , I signed my jars and it's working :smiley: