Applet Error Calling Method On Npobject
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Error Calling Method On Npobject Javascript
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Error Calling Method On Npobject Firefox
like you, helping each other. Join them; it only takes a minute: Sign up Accessing Java Applet non-static methods using Java up vote 1 down vote favorite I'm trying to access non-static methods in a java applet, error calling method on npobject safari through javascript. I access static methods using the Syntax AppletName.Packages.className.methodName(); and it works. If I try to access a non-static member/method via JavaScript, I get an error "Error calling method on NPObject", but nothing on the Java Console. Is there a way to access non-static applet methods from Javascript? java javascript applet non-static japplet share|improve this question asked Jun 27 '11 at 13:58 Anirudh Ramanathan 31.9k1177120 add a comment| 2 Answers 2 active oldest votes error calling method on npobject flash up vote 1 down vote accepted You need to instantiate a java object, then you can call your methods. var myClass = new AppletName.Packages.className(); myClass.methodName(); From here. share|improve this answer answered Jun 27 '11 at 14:19 Ravan 4,93111126 add a comment| up vote 0 down vote See Call a Java method from Javascript. share|improve this answer answered Jun 27 '11 at 14:27 Andrew Thompson 137k19130250 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Sign up using Email and Password Post as a guest Name Email Post as a guest Name Email discard By posting your answer, you agree to the privacy policy and terms of service. Not the answer you're looking for? Browse other questions tagged java javascript applet non-static japplet or ask your own question. asked 5 years ago viewed 2440 times active 5 years ago Related 67calling non-static method in static method in Java1Java - Applet simply not displaying?0Java applet permission denied, security exception1Converting a Java Application into an Applet0Returning a dragged applet to the browser window with Javascript0Signed Applet With Javascript Function Call: Initialization Error on IcedTea plugin0Importing Images in a Java Applet2How to get two applets to share fields0Java Applet with jar embed in HTML security issue0netscape.javascript.JSException: null in java applet Hot Netwo
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Uncaught Error Error Calling Method On Npobject
more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up How do I fix “Error calling method on NPObject!” when invoking http://stackoverflow.com/questions/6494011/accessing-java-applet-non-static-methods-using-java methods on a signed applet from within javascript? up vote 1 down vote favorite I am using a java applet that performs functionality that requires access outside the browser sandbox. The applet is prepared as follows: All calls requiring privileged access are wrapped appropriately in calls to AccessController.doPrivileged(). The jar is signed and includes a certificate chain that validates with jarsigner -verify (output is "jar verified."). The MANIFEST.MF http://stackoverflow.com/questions/37734820/how-do-i-fix-error-calling-method-on-npobject-when-invoking-methods-on-a-sign in the jar contains: Manifest-Version: 1.0 Created-By: 1.8.0_05 (Oracle Corporation) Permissions: all-permissions The jnlp file contains:
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or http://stackoverflow.com/questions/4458581/error-calling-method-on-npobject-when-calling-java-applet-method-from-gwt-client posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only https://bugs.chromium.org/p/chromium/issues/detail?id=47404 takes a minute: Sign up Error calling method on NPObject when calling Java Applet Method from GWT Client code up vote 2 down vote favorite 1 I receive this error when calling a Java Applet method from GWT JavaScript client error calling code. The really strange thing is, this error only occurs when I create a certain object in the said applet method. Specifically, I have a class I created in the GWT "shared" folder, which serializes a class into a JSON string from an instance of this class within the client javascript. The Java applet also instanciates this class in java space, within the said method. When I don't attempt to instanciate this class within the applet method, it runs and returns error calling method no problem. Shouldn't the java instanciation be totally independant of GWT? Also, I wonder why i'm not getting a stack trace in my java console if this exception is occurring within java. Not sure if this is relevant, but I'm using the GWTAI project for Applet->JavaScript callbacks TIA for any responses, Phaedrus 02:40:22.848 [ERROR] [u] Uncaught exception escaped com.google.gwt.core.client.JavaScriptException: (Error): Error calling method on NPObject. stack: Error: Error calling method on NPObject. at [object Object]. (unknown source) at __gwt_jsInvoke (http://127.0.0.1:8888/u/hosted.html?u:76:35) java javascript gwt share|improve this question asked Dec 16 '10 at 8:03 Phaedrus 314515 add a comment| 2 Answers 2 active oldest votes up vote 4 down vote I don't know if you've come to a solution on that one but bear in mind that GWT plugin in Chrome returns that kind of errors running the debug mode IF the object you're trying to deserialize/"javascript-ify" is too big. Apparently it has to do with some kind of stack size somehow... I've noticed that it works great on Safari for mac and of course when code is compiled... how annoying! I'm testing everything on a mac safari now since it's the only webkit-based plugin we have at the moment. Hope that helps and good luck! share|improve this answer answered Mar 16 '11 at 17:44 twingocerise 412 add a comment| up vote 1 down vote To solve this issue, I'll give you the following solution. This worked for me. Go to Chrome
on Mac Starred by 14 users Reported by afe...@gmail.com, Jun 24 2010 Back to list Status: Fixed Owner: ---- Closed: Mar 2011 Cc: mike.swi...@gmail.com, stuartmorgan@chromium.org Components: Blink Internals Internals>Plugins OS: Mac Pri: 2 Type: Bug Restrict-AddIssueComment-Commit Restricted Only users with Commit permission may comment. Sign in to add a comment Chrome Version : 5.0.375.70 URLs (if applicable) : http://java.sun.com/docs/books/tutorial/deployment/applet/iac.html Other browsers tested: Add OK or FAIL after other browsers where you have tested this issue: Safari 4: OK Firefox 3.x: OK IE 7: OK IE 8: OK What steps will reproduce the problem? 1. put a java applet with public methods in an opbject in a page 2. use javascript to call the method (via onclick or onload event) 3. call always fails What is the expected result? javascript should be able to call applet functions What happens instead? calling a java applet function from javascript throws an exception: "Error: Error calling method on NPObject!" Please provide any additional information below. Attach a screenshot if possible. This bug in the Mac version. Windows version is ok. Do not know about Linux. Comment 1 by stuartmorgan@chromium.org, Jun 25 2010 Processing Issue 47405 has been merged into this issue. Comment 2 by stuartmorgan@chromium.org, Jun 25 2010 Processing Labels: -Area-Undefined Area-Internals Internals-Plugins OS-Mac If you change the "Run applets:" pref is Applications > Java Preferences to "In their own process", then relaunch Safari, does it still work there? That will switch Safari to using the same plugin that Chrome is using. Comment 3 by afe...@gmail.com, Jun 25 2010 Processing Yes that breaks Safari as well. So is this an issue with the plugin? Does anyone have suggestions for a workaround? Comment 4 by stuartmorgan@chromium.org, Jun 25 2010 Processing Status: ExternalDependency Yes, that means this is an issue with the plugin; please file a bug against "Java" at