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POTrouble writing file from within a java applet
 

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    <p>I have created simple Java class to test file writes from applets:<br> <strong>update appeared</strong></p> <pre><code>public class localfile extends Applet{ public localfile(){ try { File f = new File("testfile.txt"); BufferedWriter out = new BufferedWriter(new FileWriter(f,true)); out.write("test"); out.close(); } catch(Exception x) System.err.println(x.toString()); } } </code></pre> <p>I have created and signed jar:</p> <pre><code>jar cvf localfile.jar localfile.java jarsigner localfile.jar yourkey </code></pre> <p>html looks like: <code>&lt;applet code="localfile.class" archive="localfile.jar", width=300, height=600</code>></p> <p>The error I get every time I run this applet is:</p> <pre><code>java.lang.SecurityException: trusted loader attempted to load sandboxed resource from file:/home/w/test/ at com.sun.deploy.security.CPCallbackHandler$ParentCallback.check(CPCallbackHandler.java:308) at com.sun.deploy.security.CPCallbackHandler$ParentCallback.access$1400(CPCallbackHandler.java:121) at com.sun.deploy.security.CPCallbackHandler$ChildElement.checkResource(CPCallbackHandler.java:473) at sun.plugin2.applet.Plugin2ClassLoader.checkResource(Plugin2ClassLoader.java:701) at sun.plugin2.applet.Applet2ClassLoader.findClass(Applet2ClassLoader.java:206) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at java.lang.ClassLoader.loadClass(ClassLoader.java:248) at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Plugin2ClassLoader.java:520) at sun.plugin2.applet.Plugin2Manager.createApplet(Plugin2Manager.java:2940) at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Plugin2Manager.java:1444) at java.lang.Thread.run(Thread.java:619) Exception: java.lang.SecurityException: trusted loader attempted to load sandboxed resource from file:/home/w/test/ </code></pre> <p>What is strange: I have created similar applet to read files and it works ok.</p> <p>Any thoughts?</p> <hr> <p>I was running this applet on both browser and applet viewer. What is strange given applet doesn't work on applet viewer and throws exception, but on browser it is fine.</p> <pre><code>java.security.AccessControlException: access denied (java.util.PropertyPermission java.security.policy write) at java.security.AccessControlContext.checkPermission(AccessControlContext.java:323) at java.security.AccessController.checkPermission(AccessController.java:546) at java.lang.SecurityManager.checkPermission(SecurityManager.java:532) at java.lang.System.setProperty(System.java:725) at localfile.&lt;init&gt;(localfile.java:15) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at java.lang.Class.newInstance0(Class.java:355) at java.lang.Class.newInstance(Class.java:308) at sun.applet.AppletPanel.createApplet(AppletPanel.java:785) at sun.applet.AppletPanel.runLoader(AppletPanel.java:714) at sun.applet.AppletPanel.run(AppletPanel.java:368) at java.lang.Thread.run(Thread.java:619) </code></pre> <p>So, beside this strange behaviour I consider my problem solved. Thanks everyone:)</p>
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