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• android throw InvocationTargetException,How to modify the error

  - by fonter

  ActivityManager am = (ActivityManager)this.getSystemService(this.ACTIVITY_SERVICE); try { clearMethod = am.getClass() .getMethod("clearApplicationUserData", String.class, IPackageDataObserver.class); } catch (Exception e) { Log.e("Error", "Android Error",e); clearMethod = null; } if(clearMethod!=null){ try { clearMethod.invoke(am,"com.android.browser",new ClearUserDataObserver()); } catch (Exception e) { Log.e("Error", "Android Exception",e); } } Exception 05-26 08:34:13.056: ERROR/Error(739): java.lang.reflect.InvocationTargetException 05-26 08:34:13.056: ERROR/Error(739): at android.app.ActivityManager.clearApplicationUserData(ActivityManager.java:475) 05-26 08:34:13.056: ERROR/Error(739): at java.lang.reflect.Method.invokeNative(Native Method) 05-26 08:34:13.056: ERROR/Error(739): at java.lang.reflect.Method.invoke(Method.java:521) 05-26 08:34:13.056: ERROR/Error(739): at com.iwidsets.clear.manager.AndClear.onCreate(AndClear.java:34) 05-26 08:34:13.056: ERROR/Error(739): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1123) 05-26 08:34:13.056: ERROR/Error(739): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2364) 05-26 08:34:13.056: ERROR/Error(739): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2417) 05-26 08:34:13.056: ERROR/Error(739): at android.app.ActivityThread.access$2100(ActivityThread.java:116) 05-26 08:34:13.056: ERROR/Error(739): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1794) 05-26 08:34:13.056: ERROR/Error(739): at android.os.Handler.dispatchMessage(Handler.java:99) 05-26 08:34:13.056: ERROR/Error(739): at android.os.Looper.loop(Looper.java:123) 05-26 08:34:13.056: ERROR/Error(739): at android.app.ActivityThread.main(ActivityThread.java:4203) 05-26 08:34:13.056: ERROR/Error(739): at java.lang.reflect.Method.invokeNative(Native Method) 05-26 08:34:13.056: ERROR/Error(739): at java.lang.reflect.Method.invoke(Method.java:521) 05-26 08:34:13.056: ERROR/Error(739): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791) 05-26 08:34:13.056: ERROR/Error(739): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:549) 05-26 08:34:13.056: ERROR/Error(739): at dalvik.system.NativeStart.main(Native Method) 05-26 08:34:13.056: ERROR/Error(739): Caused by: java.lang.SecurityException: 739 does not have permission:android.permission.CLEAR_APP_USER_DATA to clear datafor process:com.android.browser 05-26 08:34:13.056: ERROR/Error(739): at android.os.Parcel.readException(Parcel.java:1218) 05-26 08:34:13.056: ERROR/Error(739): at android.os.Parcel.readException(Parcel.java:1206) 05-26 08:34:13.056: ERROR/Error(739): at android.app.ActivityManagerProxy.clearApplicationUserData(ActivityManagerNative.java:2016) 05-26 08:34:13.056: ERROR/Error(739): ... 17 more

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• Application Errors vs User Errors in PHP

  - by CogitoErgoSum

  So after much debate back and forth, I've come up with what I think may be a valid plan to handle Application/System errors vs User Errors (I.e. Validation Issues, Permission Issues etc). Application/System Errors will be handled using a custom error handler (via set_error_handler()). Depending on the severity of the error, the user may be redirected to a generic error page (I.e. Fatal Error), or the error may simply be silently logged (i.e E_WARNING). These errors are ones most likely caused by issues outside the users control (Missing file, Bad logic, etc). The second set of errors would be User Generated ones. These are the ones may not automatically trigger an error but would be considered one. In these cases i"ve decided to use the trigger_error() function and typically throw a waning or notice which would be logged silently by the error handler. After that it would be up to the developer to then redirect the user to another page or display some sort of more meaningful message to the user. This way an error of any type is always logged, but user errors still allow the developer freedom to handle it in their own ways. I.e. Redirect them back to their form with it fully repopulated and a message of what went wrong. Does anyone see anything wrong with this, or have a more intuitive way? My approach to error handling is typically everyone has their own ways but there must be a way instituted.

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• Problem with DOMPDF and Kohana 3

  - by alex

  I have used DOMPDF many times before successfully, however outside of the Kohana Framework. I created a module for DOMPDF and called it simply pdf. Here is it's code. class Pdf { private $domPdfInstance; public function __construct($html) { if ( ! class_exists('DOMPDF', FALSE)) { // Load DOMPDF require Kohana::find_file('vendor', 'dompdf/dompdf_config.inc'); } $this->domPdfInstance = new DOMPDF; $this->domPdfInstance->load_html($html); } public function render() { $this->domPdfInstance->render(); return $this; } public function stream($filename) { if (pathinfo($filename, PATHINFO_EXTENSION) !== 'pdf') { $filename .= '.pdf'; } $this->domPdfInstance->stream($filename); return $this; } } For some reason, any PDF I generate using this results in it being corrupt (not opening under Mac OS X's Preview app at least). I have even tried this basic HTML <html> <head> <title>PDF</title> </head> <body> please work </body> </html> Is this a known problem? I have not touched anything in dompdf_config.inc.php except uncomment out the error reporting levels so they now read error_reporting(E_STRICT | E_ALL); PHP is not reporting any errors. Here is a screenshot of the error from Preview (though I think it's probably unhelpful) Some thing I have thought may be a problem Auto loading conflicts Base path conflicts

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• Looking for ideas for a simple pattern matching algorithm to run on a microcontroller

  - by pic_audio

  I'm working on a project to recognize simple audio patterns. I have two data sets, each made up of between 4 and 32 note/duration pairs. One set is predefined, the other is from an incoming data stream. The length of the two strongly correlated data sets is often different, but roughly the same "shape". My goal is to come up with some sort of ranking as to how well the two data sets correlate/match. I have converted the incoming frequencies to pitch and shifted the incoming data stream's pitch so that it's average pitch matches that of the predefined data set. I also stretch/compress the incoming data set's durations to match the overall duration of the predefined set. Here are two graphical examples of data that should be ranked as strongly correlated: http://s2.postimage.org/FVeG0-ee3c23ecc094a55b15e538c3a0d83dd5.gif (Sorry, as a new user I couldn't directly post images) I'm doing this on a 8-bit microcontroller so resources are minimal. Speed is less an issue, a second or two of processing isn't a deal breaker. It wouldn't surprise me if there is an obvious solution, I've just been staring at the problem too long. Any ideas? Thanks in advance...

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• Storing data on SD Card in Android

  - by BBoom

  Using the guide at Android Developers (http://developer.android.com/guide/topics/data/data-storage.html) I've tried to store some data to the SD-Card. This is my code: // Path to write files to String path = Environment.getExternalStorageDirectory().getAbsolutePath() + "/Android/data/"+ctxt.getString(R.string.package_name)+"/files/"; String fname = "mytest.txt"; // Current state of the external media String extState = Environment.getExternalStorageState(); // External media can be written onto if (extState.equals(Environment.MEDIA_MOUNTED)) { try { // Make sure the path exists boolean exists = (new File(path)).exists(); if (!exists){ new File(path).mkdirs(); } // Open output stream FileOutputStream fOut = new FileOutputStream(path + fname); fOut.write("Test".getBytes()); // Close output stream fOut.flush(); fOut.close(); } catch (IOException ioe) { ioe.printStackTrace(); } When I create the new FileOutputStream I get a FileNotFound exception. I have also noticed that "mkdirs()" does not seem to create the directory. Can anyone tell me what I'm doing wrong? I'm testing on an AVD with a 2GB sd card and "hw.sdCard: yes", the File Explorer of DDMS in Eclipse tells me that the only directory on the sdcard is "LOST.DIR".

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• Add Image to Base64 Encoded ImageStream in Resources (resx)

  - by NickAldwin

  I'm working on an older project, updating it. Part of the program has a toolstrip with many buttons on it, each with an image. I found that the images are stored in a Base64 encoded imagestream in the resx for the form and accessed as such: System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(Form1)); ... this.imageList1 = new System.Windows.Forms.ImageList(this.components); ... this.toolStrip1.ImageList = this.imageList1; ... this.imageList1.ImageStream = ((System.Windows.Forms.ImageListStreamer)(resources.GetObject("imageList1.ImageStream"))); ... this.toolStripButton1.ImageIndex = 0; //There are 41 images, so this can be between 0 and 40 I need to add another button with a new image. How can I add an image to this stream? I cannot use the designer, as it crashes as soon as I load the form (I believe because it uses a custom component with unsafe code). I could always just add a new image resource separate from the stream, but that would make that one button different and thus it would create problems with consistency, causing upkeep problems later. So I'm wondering if there is any way for me to edit the imagestream. I can access the raw base64 string, but I have no idea where to go from here.

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• Do you have ideas for a workaround for this Known bug in Visual Studio 2010's addIn model ?

  - by Jesper

  When developing AddIns for Visual Studio 2010 the following line fails: CommandBarEvents handler = (EnvDTE.CommandBarEvents)m_VSStudio.DTE.Events.get_CommandBarEvents(popup); Update: Forgot to tell that m_VSStudio is of the type DTE2 Where popup is of the type CommandBarPopup (for the type CommandBarControl it works though) The line fails with this Exception: System.Runtime.InteropServices.COMException (0x80020003): Member not found. (Exception from HRESULT: 0x80020003 (DISP_E_MEMBERNOTFOUND)) The exact same line worked in Visual Studio 2008. The purpose of the line is to get a handler which handles clickevents, when one clicks the Popup. After som searching I found this link: http://connect.microsoft.com/VisualStudio/feedback/details/524335/events-get-commandbarevents-exception-on-submenus-reproducible-bug-addin Which basicly states that it is a known bug, which will not be fixed, because there is a workaround. But unfortunately it does not state the workaround :( I would be extremely pleased if anybody has a great idea for a workaround ? The reason why I want to listen to the click events is because I want to show or hide the submenuitems (CommandBarControl) given some condition, when one clicks a menu (CommandBarPopup). So a workaround that uses something else than the click event would also be appreciated.

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• Javamail read multipart emails

  - by Hectai

  Hey! My code is below, and the problem is that some of the emails i get from my POP3 account cannot be read, but with a simple unix email client it can be. It would be very helpful if you can find me what the problem is, or give me some advices. ps.: yes, i have read the tutorials already. String[] messageText = new String[500]; Store store = session.getStore("pop3"); store.connect(host, username, password); Folder inbox = store.getFolder("INBOX"); inbox.open(Folder.READ_ONLY); Message[] messages = inbox.getMessages(); for(int i = 0; i < inbox.getMessageCount() ; i++) { Message m = messages[i]; Object o = m.getContent(); if (o instanceof String) messageText[i] = (String)o; else if(o instanceof Multipart) { Multipart mp = (Multipart)o; int count = mp.getCount(); for(int j = 0; j < count; j++) { BodyPart b = mp.getBodyPart(j); String disposition = b.getDisposition(); if (disposition != null && disposition.equals(BodyPart.ATTACHMENT))) { DataHandler handler = b.getDataHandler(); messageText[i] += "file name : " + handler.getName(); } else { messageText[i] += b.getContent(); } } } } store.close(); } catch(Exception ex) { notif("Failure - " + ex.getMessage()); }

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• ASP.Net menu databinding encoding problem

  - by WtFudgE

  Hi, I have a menu where I bind data through: XmlDataSource xmlData = new XmlDataSource(); xmlData.DataFile = String.Format(@"{0}{1}\Navigation.xml", getXmlPath(), getLanguage()); xmlData.XPath = @"/Items/Item"; TopNavigation.DataSource = xmlData; TopNavigation.DataBind(); The problem is when my xml has special characters, since I use a lot of french words. As an alternative I tried using a stream instead and using encoding to get the special characters, with the following code: StreamReader strm = new StreamReader(String.Format(@"{0}{1}\Navigation.xml", getXmlPath(), getLanguage()), Encoding.GetEncoding(1254)); XmlDocument xDoc = new XmlDocument(); xDoc.Load(strm); XmlDataSource xmlData = new XmlDataSource(); xmlData.ID = "TopNav"; xmlData.Data = xDoc.InnerXml; xmlData.XPath = @"/Items/Item"; TopNavigation.Items.Clear(); TopNavigation.DataSource = xmlData; TopNavigation.DataBind(); The problem I'm having now is that my data doesn't refresh when I change the path where the stream gets read. When I skip through the code it does, but not on my page. So the thing is either, how do I get the data te be refreshed? Or (which is actually preferred) how do I get the encoding right in the first piece of code? Help is highly apreciated!

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• ASIHTTPRequest POST splits up header + data?

  - by chris.o.

  Hi, I am using ASIHTTPRequest to POST data to a remote server on iPhone 4.2.1. When I make the following post request to our server, I get a 400 response (I removed the IP address): NSString dataString = @"data1=00&data2=00&data3=00"; ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:[NSURL URLWithString:[NSString stringWithFormat:<ipremoved>]]]; [request appendPostData:[dataString dataUsingEncoding:NSUTF8StringEncoding]]; [request setRequestMethod:@"POST"]; [request addRequestHeader:@"User-Agent" value:@"iphone app"]; [request addRequestHeader:@"Content-Type" value:@"application/octet-stream"]; request.delegate = self; [request startAsynchronous]; When I send the same data using curl, I receive a 200 response: curl -H "User-Agent: iphone app" -H "Accept:" -H "Content-Type:application/octet-stream" --data-ascii "data1=00&data2=00&data3=00" --location <ipremoved> -v My colleague is stating that, in the failure case, the ASIHTTPRequest requires two socket reads: one for the header and one for the data. Apparently the server is not presently equipped to parse this correctly, so I am trying to work around it. If I setup a proxy between iPhone and my Mac and run Paros (to see packets), the problem goes away. Paros combine the header and data so that it is all acquired by the server in a single socket read. I've tried a few things suggested in other posts including disabling persistent connections, but I am not having any luck. I've also tried doing a ASIHTTPFormRequest, but the server does not like the generated data format. Any suggestions would be appreciated. Thanks.

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• Custom Event - invokation list implementation considerations

  - by M.A. Hanin

  I'm looking for some pointers on implementing Custom Events in VB.NET (Visual Studio 2008, .NET 3.5). I know that "regular" (non-custom) Events are actually Delegates, so I was thinking of using Delegates when implementing a Custom Event. On the other hand, Andrew Troelsen's "Pro VB 2008 and the .NET 3.5 Platform" book uses Collection types in all his Custom Events examples, and Microsoft's sample codes match that line of thought. So my question is: what considerations should I have when choosing one design over the other? What are the pros and cons for each design? Which of these resembles the inner-implementation of "regular" events? Below is a sample code demonstrating the two designs. Public Class SomeClass Private _SomeEventListeners As EventHandler Public Custom Event SomeEvent As EventHandler AddHandler(ByVal value As EventHandler) _SomeEventListeners = [Delegate].Combine(_SomeEventListeners, value) End AddHandler RemoveHandler(ByVal value As EventHandler) _SomeEventListeners = [Delegate].Remove(_SomeEventListeners, value) End RemoveHandler RaiseEvent(ByVal sender As Object, ByVal e As System.EventArgs) _SomeEventListeners.Invoke(sender, e) End RaiseEvent End Event Private _OtherEventListeners As New List(Of EventHandler) Public Custom Event OtherEvent As EventHandler AddHandler(ByVal value As EventHandler) _OtherEventListeners.Add(value) End AddHandler RemoveHandler(ByVal value As EventHandler) _OtherEventListeners.Remove(value) End RemoveHandler RaiseEvent(ByVal sender As Object, ByVal e As System.EventArgs) For Each handler In _OtherEventListeners handler(sender, e) Next End RaiseEvent End Event End Class

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• MySQL stored procedure, handling multiple cursors and query results

  - by Tirithen

  How can I use two cursors in the same routine? If I remove the second cursor declaration and fetch loop everthing works fine. The routine is used for adding a friend in my webapp. It takes the id of the current user and the email of the friend we want to add as a friend, then it checks if the email has a corresponding user id and if no friend relation exists it will create one. Any other routine solution than this one would be great as well. DROP PROCEDURE IF EXISTS addNewFriend; DELIMITER // CREATE PROCEDURE addNewFriend(IN inUserId INT UNSIGNED, IN inFriendEmail VARCHAR(80)) BEGIN DECLARE tempFriendId INT UNSIGNED DEFAULT 0; DECLARE tempId INT UNSIGNED DEFAULT 0; DECLARE done INT DEFAULT 0; DECLARE cur CURSOR FOR SELECT id FROM users WHERE email = inFriendEmail; DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1; OPEN cur; REPEAT FETCH cur INTO tempFriendId; UNTIL done = 1 END REPEAT; CLOSE cur; DECLARE cur CURSOR FOR SELECT user_id FROM users_friends WHERE user_id = tempFriendId OR friend_id = tempFriendId; DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1; OPEN cur; REPEAT FETCH cur INTO tempId; UNTIL done = 1 END REPEAT; CLOSE cur; IF tempFriendId != 0 AND tempId != 0 THEN INSERT INTO users_friends (user_id, friend_id) VALUES(inUserId, tempFriendId); END IF; SELECT tempFriendId as friendId; END // DELIMITER ;

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• Activity has leaked window that was originally added

  - by Pentium10

  What's this error, why happens? 05-17 18:24:57.069: ERROR/WindowManager(18850): Activity com.mypkg.myP has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@44c46ff0 that was originally added here 05-17 18:24:57.069: ERROR/WindowManager(18850): android.view.WindowLeaked: Activity ccom.mypkg.myP has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@44c46ff0 that was originally added here 05-17 18:24:57.069: ERROR/WindowManager(18850): at android.view.ViewRoot.<init>(ViewRoot.java:231) 05-17 18:24:57.069: ERROR/WindowManager(18850): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:148) 05-17 18:24:57.069: ERROR/WindowManager(18850): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91) 05-17 18:24:57.069: ERROR/WindowManager(18850): at android.view.Window$LocalWindowManager.addView(Window.java:424) 05-17 18:24:57.069: ERROR/WindowManager(18850): at android.app.Dialog.show(Dialog.java:239) 05-17 18:24:57.069: ERROR/WindowManager(18850): at com.mypkg.myP$PreparePairingLinkageData.onPreExecute(viewP.java:183) 05-17 18:24:57.069: ERROR/WindowManager(18850): at android.os.AsyncTask.execute(AsyncTask.java:391) 05-17 18:24:57.069: ERROR/WindowManager(18850): at com.mypkg.myP.onCreate(viewP.java:94) 05-17 18:24:57.069: ERROR/WindowManager(18850): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 05-17 18:24:57.069: ERROR/WindowManager(18850): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2544) 05-17 18:24:57.069: ERROR/WindowManager(18850): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2621) 05-17 18:24:57.069: ERROR/WindowManager(18850): at android.app.ActivityThread.access$2200(ActivityThread.java:126) 05-17 18:24:57.069: ERROR/WindowManager(18850): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1932) 05-17 18:24:57.069: ERROR/WindowManager(18850): at android.os.Handler.dispatchMessage(Handler.java:99) 05-17 18:24:57.069: ERROR/WindowManager(18850): at android.os.Looper.loop(Looper.java:123) 05-17 18:24:57.069: ERROR/WindowManager(18850): at android.app.ActivityThread.main(ActivityThread.java:4595) 05-17 18:24:57.069: ERROR/WindowManager(18850): at java.lang.reflect.Method.invokeNative(Native Method) 05-17 18:24:57.069: ERROR/WindowManager(18850): at java.lang.reflect.Method.invoke(Method.java:521) 05-17 18:24:57.069: ERROR/WindowManager(18850): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) 05-17 18:24:57.069: ERROR/WindowManager(18850): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 05-17 18:24:57.069: ERROR/WindowManager(18850): at dalvik.system.NativeStart.main(Native Method)

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• custom httphandler in asp.net cannot get request querystring?

  - by Sander

  i've been trying to get this to work. its basicly a way to have certain MVC pages work within a webforms cms (umbraco) someone tried it before me and had issues with MVC2.0 (see here), i read the post, did what was announced there, but with or without that code, i seem to get stuck on a different matter. it seems like, if i call an url, it fires the handler, but fails to request the querystring passed, the variable originalPath is always empty, for example i call this url: http://localhost:8080/mvc.ashx?mvcRoute=/home/RSVPForm the handler is supposed to get the mvcRoute but it is always empty. thus gets rewritten to a simple / and then returns resource cannot be found error. here is the code i use now public void ProcessRequest(HttpContext httpContext) { string originalPath = httpContext.Request.Path; string newPath = httpContext.Request.QueryString["mvcRoute"]; if (string.IsNullOrEmpty(newPath)) newPath = "/"; HttpContext.Current.RewritePath(newPath, false); IHttpHandler ih = (IHttpHandler)new MvcHttpHandler(); ih.ProcessRequest(httpContext); HttpContext.Current.RewritePath(originalPath, false); } i would like some new input on this as i'm staring myself blind on such a simple issue, while i thought i would have more problems with mvc itself :p Edit have no time to investigate, but after copying the site over to different locations, using numerous web.config changes (unrelated to this error but was figuring other things out) this error seems to have solved itself. so its no longer an issue, however i have no clue as to what exactly made this to work again.

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• using ghostscript in server mode to convert pdfs to pngs

  - by emh

  while i am able to convert a specific page of a PDF to a PNG like so: gs -dSAFER -dBATCH -dNOPAUSE -sDEVICE=png16m -dGraphicsAlphaBits=4 -sOutputFile=gymnastics-20.png -dFirstPage=20 -dLastPage=20 gymnastics.pdf i am wondering if i can somehow use ghostscript's JOBSERVER mode to process several conversions without having to incur the cost of starting up ghostscript each time. from: http://pages.cs.wisc.edu/~ghost/doc/svn/Use.htm -dJOBSERVER Define \004 (^D) to start a new encapsulated job used for compatibility with Adobe PS Interpreters that ordinarily run under a job server. The -dNOOUTERSAVE switch is ignored if -dJOBSERVER is specified since job servers always execute the input PostScript under a save level, although the exitserver operator can be used to escape from the encapsulated job and execute as if the -dNOOUTERSAVE was specified. This also requires that the input be from stdin, otherwise an error will result (Error: /invalidrestore in --restore--). Example usage is: gs ... -dJOBSERVER - < inputfile.ps -or- cat inputfile.ps | gs ... -dJOBSERVER - Note: The ^D does not result in an end-of-file action on stdin as it may on some PostScript printers that rely on TBCP (Tagged Binary Communication Protocol) to cause an out-of-band ^D to signal EOF in a stream input data. This means that direct file actions on stdin such as flushfile and closefile will affect processing of data beyond the ^D in the stream. the idea is to run ghostscript in-process. the script would receive a request for a particular page of a pdf and would use ghostscript to generate the specified image. i'd rather not start up a new ghostscript process every time.

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• ServerIdentity memory leak with IHttpAsyncHandler

  - by Anton

  I have a .NET web application that consists of a single HTTP handler class that implements IHttpAsyncHandler. All requests to this handler are handled asynchronously, though some requests are short-lived and some are long-lived (nothing over a few seconds). The problem is that memory consumption grows over time as requests are handled. All profiling results point to an unbounded growth of String objects held by instances of System.Runtime.Remoting.ServerIdentity. Every String value is different, but they all look similar to: /dd41c00e_1566_4702_b660_c81cdea18a43/vigefresi5pfv8n0ekddg57z_1154.rem There is nothing in my application that uses ServerIdentity directly, and unless I am mistaken, the ServerIdentity instances are proportional to the number of incoming requests. If this is an internal .NET structure, it looks like the CLR is not cleaning up after itself. What could be causing the leak? UPDATE A little less than half of the String objects are being held by System.Runtime.Remoting. The remaining String objects are being held by System.Runtime.Serialization and look similar to: +1sgess5rjcrgbmp3kqr6bmv_3474.rem Also, the problem only seems to occur when lots of simultaneous HTTP web requests arrive.

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• java.lang.NoClassDefFoundError at Runtime Android Widget

  - by pxrb66

  I have a problem during runtime of my Android widget with Android 2.3.3 and older. When i install my widget on the screen, this error is printed : 11-03 10:26:31.127: E/AndroidRuntime(404): FATAL EXCEPTION: main 11-03 10:26:31.127: E/AndroidRuntime(404): java.lang.NoClassDefFoundError: com.app.myapp.StackWidgetService 11-03 10:26:31.127: E/AndroidRuntime(404): at com.app.myapp.StackWidgetProvider.onUpdate(StackWidgetProvider.java:229) 11-03 10:26:31.127: E/AndroidRuntime(404): at android.appwidget.AppWidgetProvider.onReceive(AppWidgetProvider.java:61) 11-03 10:26:31.127: E/AndroidRuntime(404): at com.app.mobideals.StackWidgetProvider.onReceive(StackWidgetProvider.java:216) 11-03 10:26:31.127: E/AndroidRuntime(404): at android.app.ActivityThread.handleReceiver(ActivityThread.java:1794) 11-03 10:26:31.127: E/AndroidRuntime(404): at android.app.ActivityThread.access$2400(ActivityThread.java:117) 11-03 10:26:31.127: E/AndroidRuntime(404): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:981) 11-03 10:26:31.127: E/AndroidRuntime(404): at android.os.Handler.dispatchMessage(Handler.java:99) 11-03 10:26:31.127: E/AndroidRuntime(404): at android.os.Looper.loop(Looper.java:123) 11-03 10:26:31.127: E/AndroidRuntime(404): at android.app.ActivityThread.main(ActivityThread.java:3683) 11-03 10:26:31.127: E/AndroidRuntime(404): at java.lang.reflect.Method.invokeNative(Native Method) 11-03 10:26:31.127: E/AndroidRuntime(404): at java.lang.reflect.Method.invoke(Method.java:507) 11-03 10:26:31.127: E/AndroidRuntime(404): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 11-03 10:26:31.127: E/AndroidRuntime(404): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 11-03 10:26:31.127: E/AndroidRuntime(404): at dalvik.system.NativeStart.main(Native Method) The problem is due to the fact that the compilator don't arrive to perform the link to the StackWidgetService class at this line in onUpdate method of StackWidgetProvider class : public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) { // update each of the widgets with the remote adapter for (int i = 0; i < appWidgetIds.length; ++i) { // Here we setup the intent which points to the StackViewService which will // provide the views for this collection. Intent intent = new Intent(context, StackWidgetService.class); intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetIds[i]); The widget works well with other version of Android like 3.0, 4.0 etc... Please help me :)

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• Why this not working in IE ?

  - by ankit vishwakarma

  <script> FB.init({ appId : '117680911578526', status : true, // check login status cookie : true, // enable cookies to allow the server to access the session xfbml : true // parse XFBML }); //alert(FB.getSession()); /*window.fbAsyncInit = function() { FB.Canvas.setAutoResize(); }*/ </script> <script type="text/javascript"> FB.ui( { // http://www.facebook.com/connect/prompt_feed.php?action_links=%5B%7B%22text%22%3A%22Movies%22%2C%22href%22%3A%22http%3A%2F%2Fapps.facebook.com%2Fhindi_movies%2F%22%7D%5D&api_key=117680911578526&attachment=%7B%22name%22%3A%22Raavan%20%22%2C%22href%22%3A%22http%3A%2F%2Fapps.facebook.com%2Fhindi_movies%2Fmovie%2F6%22%2C%22caption%22%3A%22I%20reviewed%20Raavan%20%20movie%20on%20HindiPix%22%2C%22media%22%3A%5B%7B%22type%22%3A%22image%22%2C%22src%22%3A%22http%3A%2F%2Fmovies.kewlsocial.com%2Fmovies%2Fuploads%2Fmovies%2FRaavna_movie_small_thumb.jpg%22%2C%22href%22%3A%22http%3A%2F%2Fapps.facebook.com%2Fhindi_movies%2Fmovie%2F6%22%7D%5D%7D&callback=http%3A%2F%2Fstatic.ak.fbcdn.net%2Fconnect%2Fxd_proxy.php%23%3F%3D%26cb%3Df1630e903ba2956%26origin%3Dhttp%253A%252F%252Fmovies.kewlsocial.com%252Ff33a89873048d9c%26relation%3Dparent%26transport%3Dflash%26frame%3Df1395ad7dcd52ce%26result%3D%2522xxRESULTTOKENxx%2522&channel_url=http%3A%2F%2Fstatic.ak.fbcdn.net%2Fconnect%2Fxd_proxy.php%23%3F%3D%26cb%3Dfc544c0f809639%26origin%3Dhttp%253A%252F%252Fmovies.kewlsocial.com%252Ff33a89873048d9c%26relation%3Dparent.parent%26transport%3Dflash&display=dialog&locale=en_US&message=&method=stream.publish&sdk=joey&user_prompt_message=Share%20your%20thoughts%20about%20movie method: 'stream.publish', //auto_publish: true, display: 'dialog', message: '' , //some default msg in textbox attachment: { name: '<?=$movie['movie_title']?>', caption: 'I reviewed <?=$movie['movie_title']?> movie on HindiPix', href: 'http://apps.facebook.com/hindi_movies/movie/<?=$this->uri->segment(3)?>', media:[{ 'type':'image', 'src':'http://movies.kewlsocial.com/movies/uploads/movies/<?=$movie['movie_image']?>', 'href':'http://apps.facebook.com/hindi_movies/movie/<?=$this->uri->segment(3)?>' }] } , action_links: [{ text: 'Movies', href: 'http://apps.facebook.com/hindi_movies/' }], //user_message_prompt: 'Radhey' user_prompt_message: 'Share your thoughts about movie' }/*, function(response) { if (response && response.post_id) { alert('Post was published.'); } else { alert('Post was not published.'); } }*/ ); </script>

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• Executable war file that starts jetty without maven

  - by twilbrand

  I'm trying to make an "executable" war file (java -jar myWarFile.war) that will start up a jetty webserver that hosts the webapp contained in the war file I executed. I found a page that described how to make what I'm looking for: http://eclipsesource.com/blogs/2009/10/02/executable-wars-with-jetty/ however, following that advice along with how I think I'm supposed to make an executable jar (war) isn't working. I have an ant task creating a war with a manifest that looks like: Manifest-Version: 1.0 Ant-Version: Apache Ant 1.7.1 Created-By: 1.5.0_18-b02 (Sun Microsystems Inc.) Main-Class: Start The contents of the war look like: > Start.class > jsp > build.jsp > META-INF > MANIFEST.MF > WEB-INF > lib > jetty-6.1.22.jar > jetty-util.6.1.22.jar When I try to execute the .war file, the error is: Exception in thread "main" java.lang.NoClassDefFoundError: org/mortbay/jetty/Handler Caused by: java.lang.ClassNotFoundException: org.mortbay.jetty.Handler at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:248) Could not find the main class: Start. Program will exit. There appears to be two errors here, one where it seems the jar files can't be found and one where the Start.class can't be found. To fix the first one, I put the jetty .jar files in the base of the war and tried again, same error. I also tried adding the WEB-INF/lib/ to the Class-path attribute of the manifest. That did not work either. Does anyone have any insight as to what I'm doing right/wrong and how I can get this executable war up and running?

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• ASP.NET MVC, areas, routing and a controller factory.

  - by Kieron

  Hi, I've an interesting problem with some routing with an ASP.NET MVC app. I'm building a CMS and I've got a catch-all handler that takes the URL and checks to see if there's some matching content in a database. If so, it displays it, otherwise we get a 404. Now I've got all that working with some test data, I moved on to write a quick admin system. I thought I'd use some of the new Area functionality baked into MVC 2, so I've created an area called Admin with a controller called Home. Now however I have a problem of the default HomeController in the Admin Area is being returned when requesting the application root path. The problem is that there is no other HomeController for the 'root' application (the one hosting all of the areas), instead the root would be redirected to the my catch-all handler and populated from the database. So now the controller factory is returning the best matching controller, which it thinks is the admin area one, what I really need is for it to not match it at all - as it did previously. Apart from renaming the Admin HomeController to something else, is there another solution?

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• File Uploading In Google Application Engine Using Django

  - by Ayush

  I am using gae with django. I have an project named MusicSite with following url mapping- urls.py from django.conf.urls.defaults import * from MusicSite.views import MainHandler from MusicSite.views import UploadHandler from MusicSite.views import ServeHandler urlpatterns = patterns('',(r'^start/', MainHandler), (r'^upload/', UploadHandler), (r'^/serve/([^/]+)?', ServeHandler), ) There is an application MusicSite inside MusicFun with the following codes- views.py import os import urllib from google.appengine.ext import blobstore from google.appengine.ext import webapp from google.appengine.ext.webapp import blobstore_handlers from google.appengine.ext.webapp import template from google.appengine.ext.webapp.util import run_wsgi_app def MainHandler(request): response=HttpResponse() upload_url = blobstore.create_upload_url('http://localhost: 8000/upload/') response.write('') response.write('' % upload_url) response.write("""Upload File: """) return HttpResponse(response) def UploadHandler(request): upload_files=request.FILES['file'] blob_info = upload_files[0] response.redirect('http://localhost:8000/serve/%s' % blob_info.key()) class ServeHandler(blobstore_handlers.BlobstoreDownloadHandler): def get(self, resource): resource = str(urllib.unquote(resource)) blob_info = blobstore.BlobInfo.get(resource) self.send_blob(blob_info) now whenever a upload a file using /start and click Submit i am taken to a blank page with the following url- localhost:8000/_ah/upload/ahhnb29nbGUtYXBwLWVuZ2luZS1kamFuZ29yGwsSFV9fQmxvYlVwbG9hZFNlc3Npb25fXxgHDA These random alphabets keep varying but the result is same. A blank page after every upload. Somebody please help. The server responses are as below- INFO:root:"GET /start/ HTTP/1.1" 200 - INFO:root:"GET /favicon.ico HTTP/1.1" 404 - INFO:root:Internal redirection to http://localhost:8000/upload/ INFO:root:Upload handler returned 500 ERROR:root:Invalid upload handler response. Only 301, 302 and 303 statuses are permitted and it may not have a content body. INFO:root:"POST /_ah/upload/ ahhnb29nbGUtYXBwLWVuZ2luZS1kamFuZ29yGwsSFV9fQmxvYlVwbG9hZFNlc3Npb25fXxgCDA HTTP/1.1" 500 - INFO:root:"GET /favicon.ico HTTP/1.1" 404 -

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• Compass - Lucene Full text search. Structure and Best Practice.

  - by Rob

  Hi, I have played about with the tutorial and Compass itself for a bit now. I have just started to ramp up the use of it and have found that the performance slows drastically. I am certain that this is due to my mappings and the relationships that I have between entities and was looking for suggestions about how this should be best done. Also as a side question I wanted to know if a variable is in an @searchableComponent but is not defined as @searchable when the component object is pulled out of Compass results will you be able to access that variable? I have 3 main classes that I want to search on - Provider, Location and Activity. They are all inter-related - a Provider can have many locations and activites and has an address; A Location has 1 provider, many activities and an address; An activity has 1 provider and many locations. I have a join table between activity and Location called ActivityLocation that can later provider additional information about the relationship. My classes are mapped to compass as shown below for provider location activity and address. This works but gives a huge index and searches on it are comparatively slow, any advice would be great. Cheers, Rob @Searchable public class AbstractActivity extends LightEntity implements Serializable { /** * Serialisation ID */ private static final long serialVersionUID = 3445339493203407152L; @SearchableId (name="actID") private Integer activityId =-1; @SearchableComponent() private Provider provider; @SearchableComponent(prefix = "activity") private Category category; private String status; @SearchableProperty (name = "activityName") @SearchableMetaData (name = "activityshortactivityName") private String activityName; @SearchableProperty (name = "shortDescription") @SearchableMetaData (name = "activityshortDescription") private String shortDescription; @SearchableProperty (name = "abRating") @SearchableMetaData (name = "activityabRating") private Integer abRating; private String contactName; private String phoneNumber; private String faxNumber; private String email; private String url; @SearchableProperty (name = "completed") @SearchableMetaData (name = "activitycompleted") private Boolean completed= false; @SearchableProperty (name = "isprivate") @SearchableMetaData (name = "activityisprivate") private Boolean isprivate= false; private Boolean subs= false; private Boolean newsfeed= true; private Set news = new HashSet(0); private Set ActivitySession = new HashSet(0); private Set payments = new HashSet(0); private Set userclub = new HashSet(0); private Set ActivityOpeningTimes = new HashSet(0); private Set Events = new HashSet(0); private User creator; private Set userInterested = new HashSet(0); boolean freeEdit = false; private Integer activityType =0; @SearchableComponent (maxDepth=2) private Set activityLocations = new HashSet(0); private Double userRating = -1.00; Getters and Setters .... @Searchable public class AbstractLocation extends LightEntity implements Serializable { /** * Serialisation ID */ private static final long serialVersionUID = 3445339493203407152L; @SearchableId (name="locationID") private Integer locationId; @SearchableComponent (prefix = "location") private Category category; @SearchableComponent (maxDepth=1) private Provider provider; @SearchableProperty (name = "status") @SearchableMetaData (name = "locationstatus") private String status; @SearchableProperty private String locationName; @SearchableProperty (name = "shortDescription") @SearchableMetaData (name = "locationshortDescription") private String shortDescription; @SearchableProperty (name = "abRating") @SearchableMetaData (name = "locationabRating") private Integer abRating; private Integer boolUseProviderDetails; @SearchableProperty (name = "contactName") @SearchableMetaData (name = "locationcontactName") private String contactName; @SearchableComponent private Address address; @SearchableProperty (name = "phoneNumber") @SearchableMetaData (name = "locationphoneNumber") private String phoneNumber; @SearchableProperty (name = "faxNumber") @SearchableMetaData (name = "locationfaxNumber") private String faxNumber; @SearchableProperty (name = "email") @SearchableMetaData (name = "locationemail") private String email; @SearchableProperty (name = "url") @SearchableMetaData (name = "locationurl") private String url; @SearchableProperty (name = "completed") @SearchableMetaData (name = "locationcompleted") private Boolean completed= false; @SearchableProperty (name = "isprivate") @SearchableMetaData (name = "locationisprivate") private Boolean isprivate= false; @SearchableComponent private Set activityLocations = new HashSet(0); private Set LocationOpeningTimes = new HashSet(0); private Set events = new HashSet(0); @SearchableProperty (name = "adult_cost") @SearchableMetaData (name = "locationadult_cost") private String adult_cost =""; @SearchableProperty (name = "child_cost") @SearchableMetaData (name = "locationchild_cost") private String child_cost =""; @SearchableProperty (name = "family_cost") @SearchableMetaData (name = "locationfamily_cost") private String family_cost =""; private Double userRating = -1.00; private Set costs = new HashSet(0); private String cost_caveats =""; Getters and Setters .... @Searchable public class AbstractActivitylocations implements java.io.Serializable { /** * */ private static final long serialVersionUID = 1365110541466870626L; @SearchableId (name="id") private Integer id; @SearchableComponent private Activity activity; @SearchableComponent private Location location; Getters and Setters..... @Searchable public class AbstractProvider extends LightEntity implements Serializable { private static final long serialVersionUID = 3060354043429663058L; @SearchableId private Integer providerId = -1; @SearchableComponent (prefix = "provider") private Category category; @SearchableProperty (name = "businessName") @SearchableMetaData (name = "providerbusinessName") private String businessName; @SearchableProperty (name = "contactName") @SearchableMetaData (name = "providercontactName") private String contactName; @SearchableComponent private Address address; @SearchableProperty (name = "phoneNumber") @SearchableMetaData (name = "providerphoneNumber") private String phoneNumber; @SearchableProperty (name = "faxNumber") @SearchableMetaData (name = "providerfaxNumber") private String faxNumber; @SearchableProperty (name = "email") @SearchableMetaData (name = "provideremail") private String email; @SearchableProperty (name = "url") @SearchableMetaData (name = "providerurl") private String url; @SearchableProperty (name = "status") @SearchableMetaData (name = "providerstatus") private String status; @SearchableProperty (name = "notes") @SearchableMetaData (name = "providernotes") private String notes; @SearchableProperty (name = "shortDescription") @SearchableMetaData (name = "providershortDescription") private String shortDescription; private Boolean completed = false; private Boolean isprivate = false; private Double userRating = -1.00; private Integer ABRating = 1; @SearchableComponent private Set locations = new HashSet(0); @SearchableComponent private Set activities = new HashSet(0); private Set ProviderOpeningTimes = new HashSet(0); private User creator; boolean freeEdit = false; Getters and Setters... Thanks for reading!! Rob

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• How to send audio data from Java Applet to Rails controller

  - by cooldude

  Hi, I have to send the audio data in byte array obtain by recording from java applet at the client side to rails server at the controller in order to save. So, what encoding parameters at the applet side be used and in what form the audio data be converted like String or byte array so that rails correctly recieve data and then I can save that data at the rails in the file. As currently the audio file made by rails controller is not playing. It is the following ERROR : LAVF_header: av_open_input_stream() failed while playing with the mplayer. Here is the Java Code: package networksocket; import java.util.logging.Level; import java.util.logging.Logger; import javax.swing.JApplet; import java.net.*; import java.io.*; import java.awt.event.*; import java.awt.*; import java.sql.*; import javax.swing.*; import javax.swing.border.*; import java.awt.*; import java.util.Properties; import javax.swing.plaf.basic.BasicSplitPaneUI.BasicHorizontalLayoutManager; import sun.awt.HorizBagLayout; import sun.awt.VerticalBagLayout; import sun.misc.BASE64Encoder; /** * * @author mukand */ public class Urlconnection extends JApplet implements ActionListener { /** * Initialization method that will be called after the applet is loaded * into the browser. */ public BufferedInputStream in; public BufferedOutputStream out; public String line; public FileOutputStream file; public int bytesread; public int toread=1024; byte b[]= new byte[toread]; public String f="FINISH"; public String match; public File fileopen; public JTextArea jTextArea; public Button refreshButton; public HttpURLConnection urlConn; public URL url; OutputStreamWriter wr; BufferedReader rd; @Override public void init() { // TODO start asynchronous download of heavy resources //textField= new TextField("START"); //getContentPane().add(textField); JPanel p = new JPanel(); jTextArea= new JTextArea(1500,1500); p.setLayout(new GridLayout(1,1, 1,1)); p.add(new JLabel("Server Details")); p.add(jTextArea); Container content = getContentPane(); content.setLayout(new GridBagLayout()); // Used to center the panel content.add(p); jTextArea.setLineWrap(true); refreshButton = new java.awt.Button("Refresh"); refreshButton.reshape(287,49,71,23); refreshButton.setFont(new Font("Dialog", Font.PLAIN, 12)); refreshButton.addActionListener(this); add(refreshButton); Properties properties = System.getProperties(); properties.put("http.proxyHost", "netmon.iitb.ac.in"); properties.put("http.proxyPort", "80"); } @Override public void actionPerformed(ActionEvent e) { try { url = new URL("http://localhost:3000/audio/audiorecieve"); urlConn = (HttpURLConnection)url.openConnection(); //String login = "mukandagarwal:rammstein$"; //String encodedLogin = new BASE64Encoder().encodeBuffer(login.getBytes()); //urlConn.setRequestProperty("Proxy-Authorization",login); urlConn.setRequestMethod("POST"); // urlConn.setRequestProperty("Content-Type", //"application/octet-stream"); //urlConn.setRequestProperty("Content-Type","audio/mpeg");//"application/x-www- form-urlencoded"); //urlConn.setRequestProperty("Content-Type","application/x-www- form-urlencoded"); //urlConn.setRequestProperty("Content-Length", "" + // Integer.toString(urlParameters.getBytes().length)); urlConn.setRequestProperty("Content-Language", "UTF-8"); urlConn.setDoOutput(true); urlConn.setDoInput(true); byte bread[]=new byte[2048]; int iread; char c; String data=URLEncoder.encode("key1", "UTF-8")+ "="; //String data="key1="; FileInputStream fileread= new FileInputStream("//home//mukand//Hellion.ogg");//Dogs.mp3");//Desktop//mausam1.mp3"); while((iread=fileread.read(bread))!=-1) { //data+=(new String()); /*for(int i=0;i<iread;i++) { //c=(char)bread[i]; System.out.println(bread[i]); }*/ data+= URLEncoder.encode(new String(bread,iread), "UTF-8");//new String(new String(bread));// // data+=new String(bread,iread); } //urlConn.setRequestProperty("Content-Length",Integer.toString(data.getBytes().length)); System.out.println(data); //data+=URLEncoder.encode("mukand", "UTF-8"); //data += "&" + URLEncoder.encode("key2", "UTF-8") + "=" + URLEncoder.encode("value2", "UTF-8"); //data="key1="; wr = new OutputStreamWriter(urlConn.getOutputStream());//urlConn.getOutputStream(); //if((iread=fileread.read(bread))!=-1) // wr.write(bread,0,iread); wr.write(data); wr.flush(); fileread.close(); jTextArea.append("Send"); // Get the response rd = new BufferedReader(new InputStreamReader(urlConn.getInputStream())); while ((line = rd.readLine()) != null) { jTextArea.append(line); } wr.close(); rd.close(); //jTextArea.append("click"); } catch (MalformedURLException ex) { Logger.getLogger(Urlconnection.class.getName()).log(Level.SEVERE, null, ex); } catch (IOException ex) { Logger.getLogger(Urlconnection.class.getName()).log(Level.SEVERE, null, ex); } } @Override public void start() { } @Override public void stop() { } @Override public void destroy() { } // TODO overwrite start(), stop() and destroy() methods } Here is the Rails controller function for recieving: def audiorecieve puts "///////////////////////////////////////******RECIEVED*******////" puts params[:key1]#+" "+params[:key2] data=params[:key1] #request.env('RAW_POST_DATA') file=File.new("audiodata.ogg", 'w') file.write(data) file.flush file.close puts "////**************DONE***********//////////////////////" end Please reply quickly

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• FileReference.load() does not as excepted

  - by Yang Bo

  I used Flash player 10, and Flex SDK 3.4. The code as followings: // Following comes callbacks function imageLoadOpenCallback(evt:Event):void { trace("in--open"); } function imageLoadCompleteCallback(evt:Event):void { trace("in--load"); var fr:FileReference = evt.target as FileReference; trace(fr.data); } function imageLoadErrorCallback(evt:IOErrorEvent):void { trace("in--ioerror"); } function imageSelectCancelCallback(evt:Event):void { trace("in cancel"); } function imageSelectCallback(evt:Event):void { trace("in -- select"); for (var i:int=0; i<frl.fileList.length; i++) { frl.fileList[i].addEventListener(Event.OPEN, imageLoadOpenCallback); frl.fileList[i].addEventListener(Event.COMPLETE, imageLoadCompleteCallback); frl.fileList[i].addEventListener(IOErrorEvent.IO_ERROR, imageLoadErrorCallback); frl.fileList[i].load(); trace(frl.fileList[i]); trace(frl.fileList[i].creationDate); trace(frl.fileList[i].creator); trace(frl.fileList[i].data); trace(frl.fileList[i].name); } } // Following comes UI handlers function onAddPictures():void { var imageFilter:FileFilter = new FileFilter("Images", "*.jpg;*.png"); frl.addEventListener(Event.SELECT, imageSelectCallback); frl.addEventListener(Event.CANCEL, imageSelectCancelCallback); frl.browse([imageFilter]); } Only the imageSelectCancelCallback handler get called when I select some files in the dialog. But no load/open/io_error handler get called at all. I have Google some code example, in which it used FileReference instead of FileReferenceList. I don't know the reason, could you please help me?

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• An alternative to reading input from Java's System.in

  - by dvanaria

  I’m working on the UVa Online Judge problem set archive as a way to practice Java, and as a way to practice data structures and algorithms in general. They give an example input file to submit to the online judge to use as a starting point (it’s the solution to problem 100). Input from the standard input stream (java.lang.System.in) is required as part of any solution on this site, but I can’t understand the implementation of reading from System.in they give in their example solution. It’s true that the input file could consist of any variation of integers, strings, etc, but every solution program requires reading basic lines of text input from System.in, one line at a time. There has to be a better (simpler and more robust) method of gathering data from the standard input stream in Java than this: public static String readLn(int maxLg) { byte lin[] = new byte[maxLg]; int lg = 0, car = -1; String line = “”; try { while (lg < maxLg) { car = System.in.read(); if ((car < 0) || (car == ‘\n’)) { break; } lin[lg++] += car; } } catch (java.io.IOException e) { return (null); } if ((car < 0) && (lg == 0)) { return (null); // eof } return (new String(lin, 0, lg)); } I’m really surprised by this. It looks like something pulled directly from K&R’s “C Programming Language” (a great book regardless), minus the access level modifer and exception handling, etc. Even though I understand the implementation, it just seems like it was written by a C programmer and bypasses most of Java’s object oriented nature. Isn’t there a better way to do this, using the StringTokenizer class or maybe using the split method of String or the java.util.regex package instead?

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