AppletTalk.com Java discussions newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Loading an image file into an applet          AppletTalk.com Forum Index -> Java Help View previous topic :: View next topic   Author Message Ed Guest Posted: Wed Jul 27, 2005 3:37 am    Post subject: Loading an image file into an applet I'm fairly new to Java, trying to make my first significant Japplet. It's a small BlackJack game with a swing interface. I'm trying to display GIF images of the card faces, but I can't get the GIF images to load. I keep getting security exceptions saying the applet doesn't have read access. I've got the class files and images packaged in a JAR file. The image files are stored in a folder named "cardfile". Here's the java code I use to read the images: Toolkit kit = Toolkit.getDefaultToolkit(); String blankCard = "cardfile/blank.GIF"; Image blankCardImage = kit.getImage(blankCard); I launch the applet with this HTML from the same directory as the JAR file: <applet code="Hello1.class" archive="Hello1.jar" width="800" height="600"> </applet> I can run my applet from AppletViewer within my IDE (Netbeans), but I can't run it from disk or my webserver. Here are the runtime exceptions I keep getting: java.security.AccessControlException: access denied (java.io.FilePermission cardfile/blank.GIF 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.checkRead(Unknown Source) at sun.awt.SunToolkit.getImageFromHash(Unknown Source) at sun.awt.SunToolkit.getImage(Unknown Source) at GUItype.<init>(GUItype.java:61) at Hello1.init(Hello1.java:66) at sun.applet.AppletPanel.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Exception in thread "thread applet-Hello1.class" java.lang.NullPointerException at sun.plugin.util.GrayBoxPainter.showLoadingError(Unknown Source) at sun.plugin.AppletViewer.showAppletException(Unknown Source) at sun.applet.AppletPanel.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Like I said, I'm new to Java, but best I can tell it says I don't have file permission to read the GIF files. I thought that Applets could read files stored within the same codebase that they were launched from, without any special security settings. When I remove the attempts to read the images, the applet works fine. Any ideas? Back to top Andrew Thompson Guest Posted: Wed Jul 27, 2005 8:25 am    Post subject: Re: Loading an image file into an applet On Wed, 27 Jul 2005 03:37:28 GMT, Ed wrote: Quote: I'm fairly new to Java, .. I hope the fact that you're multi-posting means you are also new to groups and simply don't understand. <http://www.physci.org/codes/javafaq.jsp#xpost> -- Andrew Thompson physci.org 1point1c.org javasaver.com lensescapes.com athompson.info Not Affiliated With Futurama Brass Knuckle Co. Back to top Tor Iver Wilhelmsen Guest Posted: Wed Jul 27, 2005 2:42 pm    Post subject: Re: Loading an image file into an applet "Ed" <nospam (AT) nospam (DOT) com> writes: Quote: Toolkit kit = Toolkit.getDefaultToolkit(); String blankCard = "cardfile/blank.GIF"; Image blankCardImage = kit.getImage(blankCard); This will try to get the image from the local filesystem. Look into Class.getResource() and the ImageIcon class. Back to top Ed Guest Posted: Thu Jul 28, 2005 4:02 am    Post subject: Re: Loading an image file into an applet "Tor Iver Wilhelmsen" <jadedgamer (AT) hotmail (DOT) com> wrote Quote: "Ed" <nospam (AT) nospam (DOT) com> writes: Look into Class.getResource() and the ImageIcon class. Thanks, that did the trick! The Applet tutorial and the Icon tutorial worked me through it today. Back to top Ed Guest Posted: Thu Jul 28, 2005 4:08 am    Post subject: Re: Loading an image file into an applet "Andrew Thompson" <SeeMySites (AT) www (DOT) invalid> wrote Quote: On Wed, 27 Jul 2005 03:37:28 GMT, Ed wrote: I'm fairly new to Java, .. I hope the fact that you're multi-posting means you are also new to groups and simply don't understand. http://www.physci.org/codes/javafaq.jsp#xpost -- No, actually I did it on purpose because I knew I would have a higher probability of getting a correct answer that way. Back to top Andrew Thompson Guest Posted: Thu Jul 28, 2005 4:48 am    Post subject: Re: Loading an image file into an applet On Thu, 28 Jul 2005 04:08:09 GMT, Ed wrote: Quote: "Andrew Thompson" <SeeMySites (AT) www (DOT) invalid> wrote in message ... I hope the fact that you're multi-posting means you are also new to groups and simply don't understand. ... No, actually I did it on purpose because I knew I would have a higher probability of getting a correct answer that way. That won't work for long.. <http://groups.google.com.au/group/comp.lang.java.programmer/msg/10de9f6b8684aa75> -- Andrew Thompson physci.org 1point1c.org javasaver.com lensescapes.com athompson.info Now Interactive! Joystick Controls Fry's Left Ear. 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