exception

问题 I could see several topics on try - catch but doesnt seem to discuss errors if any from finally block itself. I found that the error is not handled if it is in finally block. What would be the ideal way to manage finally? For eg. below is a mail function. if there is any error in try block, finally will execute the quit method which itself is not initiated so an unhandled error occurs. So is it better to ensure there is no errors occur in finally block? def send_email(ldap, email_address,

问题 The proper way to handle exceptions thrown by the doInBackground method of SwingWorker class is to invoke the get method from within the done method, as explained here and here. The documentation for the get method states the following: Waits if necessary for the computation to complete, and then retrieves its result. Note: calling get on the Event Dispatch Thread blocks all events, including repaints, from being processed until this SwingWorker is complete. Therefore, if the get method

问题 I get this error when my web application p/invokes a win32 dll (Player.dll) System.DllNotFoundException: Unable to load DLL 'Player.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E) at Player.PlayerProxy.Initialize() atRunaware.WpfBrowserApp.Player.Page1.PlayFile(Object sender, RoutedEventArgs e) The application is written in WPF (XBAP). I've the following info in the .manifest file. Although all .Net DLLs are mentioned in <dependency> tags, the win32 dll is

问题 This is the continuation of How to set [DataMember] on all class members So I have to serialize a class with dictionaries and other members. I have chonse the datacontext serialization that se public SimpleDataGridSample() { if (false) { MyClass theclass = new MyClass(); var serializer = new DataContractSerializer(typeof(MyClass)); using (Stream fileStream = File.Open("aaa.bin", FileMode.Create)) { XmlDictionaryWriter binaryDictionaryWriter = XmlDictionaryWriter.CreateBinaryWriter(fileStream)

问题 On my client I am trying to make MIDI files fade out before continuing on to the next MIDI in the sequence, but I've been having trouble with it. With the code below, it causes a nullpointerException at track.add , I was wondering what I am doing wrong? I'm relatively new to Java programming, so please be specific in your answers public void run() { active = true String s = findcachedir(); uid = getuid(s); if(midiplay) { /* midi = s + savereq; midiplay = false; */ midi = s + savereq; try { /

问题 I am on windows 7 x64. I am writing a server which opens a thread for every incoming connection - the thread reads from the connection's input stream. The read() should block and throw an exception if the socket is closed(). It does not - just returns -1. If I do not close the connection from the client - just let the client terminate - I get a connection reset as excpected - but if I close() the connection from the client (or just the client's output stream for that matter) read() in the

问题 I want to get content using Post method on my Android App, but always crash on response.getEntity() throwing the error "Content has been consumed" . I wonder what is wrong. That error appears if I try to get content several times, but on my code I only try once. My HttpPost code: public class MyActivity extends Activity { /*****************************************/ /*** FUNCION POST - RECUPERAMOS DATOS ***/ /*****************************************/ public class TaskGet extends AsyncTask

问题 I have an activity (BookMarks) that is called from main activity. BookMarks throw an exception (not all the time) I can't figure out what this exception means. I/ActivityManager( 181): START {cmp=com.unreal.muslim/.BookMarks} from pid 25558 I/WindowManager( 181): createSurface Window{41fbf070 Loading... paused=false}: DRAW NOW PENDING I/WindowManager( 181): createSurface Window{41da2230 com.unreal.muslim/com.unreal.muslim.BookMarks paused=false}: DRAW NOW PENDING E/bm run catch(25558): Only

问题 I have an activity (BookMarks) that is called from main activity. BookMarks throw an exception (not all the time) I can't figure out what this exception means. I/ActivityManager( 181): START {cmp=com.unreal.muslim/.BookMarks} from pid 25558 I/WindowManager( 181): createSurface Window{41fbf070 Loading... paused=false}: DRAW NOW PENDING I/WindowManager( 181): createSurface Window{41da2230 com.unreal.muslim/com.unreal.muslim.BookMarks paused=false}: DRAW NOW PENDING E/bm run catch(25558): Only

问题 I have the following code: private Multimap<Object, ComplexCalcStrategy> strategies = HashMultimap.create(); .... Collection<ComplexCalcStrategy> strategiesThatNeedUpdating = strategies.get(mktDataChange.getOptionId()); for (ComplexCalcStrategy strategy : strategiesThatNeedUpdating) { //row number 88 updateMarketData(strategy.getStrategy(), mktDataChange); } and in logs I see following trace: java.util.ConcurrentModificationException at java.util.HashMap$HashIterator.nextEntry(HashMap.java