Error Calling Npobject Applet
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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 error calling method on npobject applet the company Business Learn more about hiring developers or posting ads with us Stack Overflow error calling method on npobject javascript Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 error calling method on npobject android webview million programmers, just 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
Error Calling Method On Npobject Firefox
in a java applet, 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 32k1177120 add a error calling method on npobject safari comment| 2 Answers 2 active oldest votes 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 4,96111126 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 2450 times active 5 years ago Related 68calling 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 A
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Uncaught Error Error Calling Method On Npobject
Learn 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 http://stackoverflow.com/questions/6494011/accessing-java-applet-non-static-methods-using-java like you, helping each other. Join them; it only takes a minute: Sign up Javascript return “Error: Error calling method on NPObject!” when javascript calling Applet public method up vote 0 down vote favorite 1 I'm trying to return some customer information, but when I run the applet on my machine the browser returns these errors: Firefox: http://stackoverflow.com/questions/37447186/javascript-return-error-error-calling-method-on-npobject-when-javascript-cal Error: Error calling method on NPObject! Chrome: encript.js:7 Uncaught TypeError: applet.returnMD5 is not a function Main.java public class Main extends Applet { private String ip; private String macLocal; private String md5; private InetAddress ipLocal; @Override public void init() { super.init(); //To change body of generated methods, choose Tools | Templates. } public String returnIp(){ try { ipLocal = InetAddress.getLocalHost(); ip = ipLocal.getHostAddress(); } catch (UnknownHostException ex) { Logger.getLogger(Principal.class.getName()).log(Level.SEVERE, null, ex); } return ip; } public String returnMac(){ try { ipLocal = InetAddress.getLocalHost(); NetworkInterface network = NetworkInterface.getByInetAddress(ipLocal); byte[] mac = network.getHardwareAddress(); StringBuilder sb = new StringBuilder(); for (int i = 0; i < mac.length; i++) { sb.append(String.format("%02X%s", mac[i], (i < mac.length - 1) ? "-" : "")); } macLocal = sb.toString(); } catch (SocketException ex) { Logger.getLogger(Principal.class.getName()).log(Level.SEVERE, null, ex); } catch (UnknownHostException ex) { Logger.getLogger(Principal.class.getName()).log(Level.SEVERE, null, ex); } return macLocal; } public String returnMD5(){ try { MessageDigest m=MessageDigest.getInstance("MD5"); String ipMaisMac = new StringBuffer(retornaIp()).reverse().toString() + new StringBuffer(retornaMac()).reverse().toString() ; m.update(ipMaisMac.getBytes(),0,ipMaisMac.length()); BigInteger i = new BigInteger(1, m.digest()); md5 = String.format("%1$032X", i);
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 http://stackoverflow.com/questions/826669/trouble-calling-an-applet-method-from-page developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question https://bugs.chromium.org/p/chromium/issues/detail?id=47404 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 Trouble calling an applet method from page up vote 1 down vote favorite I know it's not optimal, but I have to work with it, a page making calls to the applet. error calling My problem is, when I do so, I recieve a rather cryptic error message: "uncaught exception: Error calling method on NPObject! [plugin exception: java.lang.reflect.InvocationTargetException]." Can anyone decode this? Even multiple possibilities would be better than the junk I came up with. The basic call to the applet is from a javascript call: document.getElementById('my_applet').passData("pass some data", someOtherData); As you can see, the passData method is the exposed method I am trying to use. The applet itself works fine on the error calling method page, it's just when I try to call this, it doesn't do anything except throw that error. If I ask the person working on the applet (it's not my portion) is it possible for them to add constructive error throwing or am I not even at the point of connecting to the applet yet? java javascript gwt applet share|improve this question asked May 5 '09 at 20:00 Organiccat 2,914134282 add a comment| 2 Answers 2 active oldest votes up vote 4 down vote accepted InvocationTargetException indicates that the underlying method in your applet threw an exception. The Javascript to Java "boundary" uses reflection, so exceptions thrown by the Java code are wrapped like this. (This makes it possible to distinguish them from exceptions thrown before you got into your Java code. For example, if you tried to call a non-existant method.) You can get the original exception by catching the InvocationTargetException and then calling its getTargetException() or getCause() method (they both do exactly the same thing). share|improve this answer answered May 5 '09 at 20:24 Laurence Gonsalves 77k15145203 Thanks, that's definitely going to help out. I'll leave the question open in case I get any more hits, but I'll check back tomorrow morning in case anyone has any more insight on it. –Organiccat May 5 '09 at 20:36 add a comment| up vote 0 down vote I'd suggest you look into what someOther
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