runtime

问题 What is the best practise to do exception handling when error is thrown in different layers. I have 4 layers of code - DAO , SERVICE , BUSINESS, PRESENTATION. I am trying to catch some run time exception in the dao layer and want it to display in the presentation layer with some message.Is the below approach a good one ? Here in the code snippets - DataException is my runtime exception class.Service and Business exception classes are my checked exception implementation classes. Code snippets

问题 I have a C# project that builds into a single DLL with two classes, ClassA and ClassB. For project management reasons, I'd like to move ClassB into a separate DLL, leaving the original DLL with ClassA only. The problem is that I have other DLLs (also compiled from C#) that reference ClassA and ClassB in their original DLL. ClassA is fine but calling ClassB ends up with a TypeLoadException. (I could recompile all of those other DLLs with their new project references, but I'd rather not do that

问题 I see some related questions have been asked, but they're either too advanced for me to grasp or lacking a step-by-step guide from start to finish (most of them end up being insider talk of their own experiment results). OK here it is, given this simple program: #include <stdio.h> #include <string.h> int main() { FILE * f; char buffer[100]; memset(buffer, 0, 100); fun(); f = fopen("main.cpp", "r"); fread(buffer, 1, 99, f); printf(buffer); fclose(f); return 0; } What it does is basically print

问题 I have been googling for some time, and everyone seems to have a different solution, none of which appear to be working for me. I have tried both ProcessBuilder and Runtime . Both calling the .sh file directly and feeding it to /bin/bash . With no luck. Back to basics, my current code is as follows; String cmd[] = { "~/path/to/shellscript.sh", "foo", "bar" }; Process p = Runtime.getRuntime().exec(cmd); Which is giving a No such file or directory error, despite that manually running; ~/path/to

问题 I try to develop a first app that download images from the net and show them in a gridview. The gridview is a fragment of a main Activity. The download process is made with an AsyncTask in the onCreate Function. In order not to download again the images while changing orientation, i set the android:configChanges="orientation|screenSize" in the Android Manifest. Then the onCreate function is only call once and everything's good ... except that i've got to make a few changes in the layout for

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 4 years ago . how to get and set a property value with runtime in Objective-C? in any argument type and return type 回答1: First we have to differentiate between properties and ivars. If an accessor is coded explicitly or if the property is not ivar-backed, it is called a "stored property". A. Accessing a Property

问题 I am trying to do something using system exec in Java Runtime.getRuntime().exec(command); Surprisingly everything that is related with paths, directories and files is not working well I don't get why and just want to know is there any alternatives ? 回答1: The alternative is to use the ProcessBuilder class, which has a somewhat cleaner interface, but your main problem is probably related to how the OS processes command lines, and there isn't much Java can do to help you with that. 回答2: As noted

问题 I am aiming at downloading code (library / framework / bundle) when the app is running. This is like download specific modules based on user's ACL. I have gone through creating static library and framework which seems like we need them when code signing app. But I need the code to be downloaded when user is using the app and run that code. Pls provide some samples 来源： https://stackoverflow.com/questions/35202560/ios-download-code-when-app-is-running

问题 This question already has an answer here : Converting a program to accept unsigned integer (1 answer) Closed 2 years ago . I am trying to write a program that applies Ulam's conjecture to a number. I have the program working, however it refuses to accept the numbers 38836 and 38838. When these numbers are entered, it gives me the error: NUMBER OUT OF RANGE TRY AGAIN. The stack is at 256, and the variable used is a DW type. I am brand new to assembly and so I apologize if I did not include

问题 I am using Java 1.7 with neo4j-community-2.0-1.1 to build a sample neo4j graph database. Please see below my code import org.neo4j.graphdb.Direction; import org.neo4j.graphdb.GraphDatabaseService; import org.neo4j.graphdb.Node; import org.neo4j.graphdb.Relationship; import org.neo4j.graphdb.RelationshipType; import org.neo4j.graphdb.Transaction; import org.neo4j.graphdb.factory.GraphDatabaseFactory; public class showData { private static final String Neo4J_DBPath = "/Technology/neo4j