exception

问题 We all know that SQLException is a checked Exception and most of us agree that checked Exception are verbose and leads to throw/catch pollution. Which approach should I choose to avoid SQLException throwing? Which wrapper/technique/library is recommended? (for example DataAccessException for the Spring folks, but I don't want to use Spring) 回答1: Just wrap it as new RuntimeException(jdbce) . Or defince your own exception that extends runtime exception and use it. I do not think that any

问题 I've got a function that checks a list of objects to see if they've been clicked and fires the OnClick events accordingly. I believe the function is working correctly, however I'm having an issue: When I hook onto one of the OnClick events and remove and insert the element into a different position in the list (typical functionality for this program), I get the "Collection was modified..." error. I believe I understand what is going on: The function cycles through each object firing OnClick

问题 I'm trying to upload a file to Dropbox using the Dropbox API tutorial. I logged in when creating the Activity and I add some code to the onResume() method as said in the tutorial. Then, after clicking a button, startService() method is called. When it reaches the line "com.dropbox.client2.DropboxAPI.Entry response = mDBApi.putFile("/working-draft.txt", inputStream, file.length(), null, null);", the app throws an Exception (not a DropboxException, nor DropboxUnlinkedException, .... It just

问题 Fatal error: Uncaught exception 'MongoConnectionException' with message 'Failed to connect to: localhost:27017: Permission denied' in /var/www/html/test.php:8 Stack trace: #0 /var/www/html/test.php(8): MongoClient->__construct() #1 {main} thrown in /var/www/html/test.php on line 8 Hi Mongo experts... I am a developer wanting to try out MongoDB. So installed centoOS 6.5 64bit in a test machine (Dell E520 Intel Dual Core 4GB Ram), installed PHP (Apache was already present). Then installed

问题 I've encountered the folowing exception while I was trying to implement my first spring+hibernate web app: java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'userProfile' available as request attribute at org.springframework.web.servlet.support.BindStatus.<init>(BindStatus.java:141) at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getBindStatus(AbstractDataBoundFormElementTag.java:174) at org.springframework.web.servlet

问题 I'm trying to take input from the user to build a grid for a 2d mine's weeper game, the process goes pretty smooth when I pass valid values to the Scanner, but when I try invalid things it goes through infinite loop even the try block is try with resources which should close the scanner with each a new try, it sounds it doesn't close it when it prints the string on the catch infinitely int gridSize = 0; System.out.println("how much do you want the grid's size"); try (Scanner scanner = new

问题 I'm sorry; I don't like asking "why am I getting exception ?" questions on StackOverflow (bit ironic now that I think of it...) , but I can't figure out the cause of this exception! I've searched for a solution, but those that popped up were either for a subtly different exception, when people were trying to access a Transferrable outside of an event handler, or not ever answered at all. I'm trying to do this right inside the DropTargetListener#drop(DropTargetListener) method. I'm testing

问题 As a followup to my previous question, I was trying to create co-operative user defined exceptions that don't violate LSP. I tried to search the PEPs and use PyCharm but I was unable to get a clear answer. I only found this PEP, but it talks about BaseException , the docs state if you want to create a user defined exception, use Exception . What are the required arguments that should be passed to the Exception constructor without violating LSP ? class StudentValueError(Exception): """Base

问题 When I abort(404) Laravel 5.2 returns an error page. But when I call Auth::check() of Auth::user() through the dump() method it return null. But I want a custom error page with the current logged-in user on the screen (for example in the layouts/app.blade.php I want in the menu: Goodmorning username ). I tried to enable the web middleware on the app/exceptions/handler.php but that didn't work. Anny suggestions? 回答1: You could add custom error message: abort(404, 'ow noo, error 404'.Auth::user

问题 I'm trying to add to my glassfish server the support for http, so I looked on internet and I found this tutorial : http://javadude.wordpress.com/2010/04/06/getting-started-with-glassfish-v3-and-ssl/ I tried to add the trusted certificates in both cacerts.jks and server.keystore, I changed my master password to match the one from the keystores, I've tried almost each options on the glassfish admin interface without success. Maybe you will be able to help Here are my logs: [#|2011-12-01T17:32