exception

问题 I am curious about if I should add throws ExceptionClass or not after the method's signature.(ExceptionClass extends RuntimeException) For instance: public void foo() // throws ExceptionClass { // ... throw new ExceptionClass(""); } 回答1: Ideally you don't need to add runtime exception in method's throws clause. Since you want the consumer of this method to be aware of chances that this method may throw exception , i would say use javadoc either. Below is example of how you should use : /** *

问题 I have a database and I am doing a query to it using Cursor mCursor = mapDb.query(MY_TABLE, new String[] {KEY_ONEID, KEY_TWOID}, "trim("+KEY_TWOID + ") != '' ", null, null, null, null); which in SQL terms literally means: SELECT OneId, TwoId FROM auth WHERE trim(TwoId) != '' Using the raw SQL query this works in my SQLite browser to show me the rows in question, so the Cursor object should contain the same results. Secondly in my java method I am using a condition to check if this result has

问题 I'm trying to get a boolean value I saved using isolatedStoragesettings like this: IsolatedStorageSettings.ApplicationSettings.TryGetValue(KEYSTRING, out myBoolValue); but I get this exception only when I debug Operation not permitted on IsolatedStorageFileStream. when I use (run without debug) Ctrl+F5 it works just fine. any idea whats wrong here? 回答1: It appears that this exception can be the result of accessing IsolatedStorageSettings.ApplicationSettings from multiple threads (which would

问题 Lets say have this immutable record type: public class Record { public Record(int x, int y) { Validator.ValidateX(x); Validator.ValidateY(y); X=x; Y=y; } public final int X; public final int Y; public static class Validator { public void ValidateX(int x) { if(x < 0) { throw new UnCheckedException; } } public void ValidateY(int y) { if(y < 0) { throw new UnCheckedException; } } } } Notice it throws an unchecked exception. The reason is because this is a object that is used quite often and it

问题 How to format/design your class if you can get 2 different response request from the server? Note: Retrofit will thrown an Exception if the JSON response format (design) is different with your class. All fields from JSON response must be present in your class. Java class, like JSON response: public class RequestResponseLogin { public ResponseLogin status; public class ResponseLogin { public boolean success; public List<String> message; } } The JSON response: { "status" : { "success" : false

问题 I want to throw a custom exception which is the data validation exception in a controller of my CakePHP application. How do I create my own custom exception handler in Cakephp so that I can throw the exception and catch the exception? My code example: function getUserDetails($userid){ try{ if(!$validUser){ throw new Exception('Invalid User'); } return $userDetailsData; //returned from db }catch(Exception $e){ echo 'Error:'.$e->getMessage(); return; } } is it possible to use here custom

问题 Say that I have a basic Spring Integration flow like: <jms:inbound-channel-adapter> <poller> <transactional/> </poller> </jms:inbound-channel-adapter> <some:outbound-channel-adapter/> If the outbound adapter throws an exception the entire transaction is rolled back. If the inbound message subsystem supports it the message will be redelivered a number of times until it will eventually be posted on the Dead Letter Queue. This is fine - except that the exception itself is lost which is very

问题 I received the following crash report (truncated) Exception Type: EXC_CRASH (SIGSEGV) Exception Codes: 0x00000000, 0x00000000 Crashed Thread: 0 Thread 0 name: Dispatch queue: com.apple.main-thread Thread 0 Crashed: 0 libsystem_kernel.dylib 0x36df00d8 __psynch_mutexwait + 24 1 libsystem_c.dylib 0x31760674 pthread_mutex_lock + 376 2 CoreFoundation 0x31f2338a CFRunLoopWakeUp + 50 3 WebCore 0x308d0bc8 _WebThreadRun + 284 4 UIKit 0x37921c7a -[UIWebDocumentView _runLoadBlock:] + 38 5 UIKit

问题 I have read all the Q&A I could find here and on the MS forums about this exception, and tried most of the suggestions that I understood, and a few others. It seems that this exception can come up for a wide range of causes. As with others, I have a WPF DataGrid bound to a collection, which throws this exception when one tries to edit one of the cells. They are set to be write-able, the collection is an ObservableCollection, I've implemented get and set handlers which send notification

问题 I am on windows 7 64 bit and using eclipse indigo. I downloaded the latest version of jogl 2 and i have created an eclipse project following this link https://sites.google.com/site/justinscsstuff/jogl-tutorial-2 this tutorial is old as the jars in the jogl download dont match and i have included all the jars and for each jar set the native libraries directory. I have written a small jogl test program that creates a GLProfile, GlCapabilities and an awt frame. I get this exception: java.lang