exception

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

问题 This Might be a long question but please do bear with me a little. I have a Datagridview1 on Form1 with the columns BranchCode("cells(2) ,FormCode("cells(3)")), Quantity("cells(5)") Now Let's say this is how it looks like DGV1 BranchCode | FormCode | Quantity 001 Frm1 10 002 Frm2 -10 001 Frm1 20 Now on DGV2 let's say I have an data with the same branch code and form code DGV2 BranchCode | FormCode | Quantity 001 Frm1 50 002 Frm2 50 Now the code below loops through DGV1 then sums up all the

问题 I have the following action: def show @video = @commentable = @favoritable = Video.find_by_key(params[:key]) Video.increment_counter(:views_count, @video.id) end But right now if find_by_key doesn't find a record, it throws a RuntimeError ( Called id for nil ). So how can I get that action to throw a 404 if a record isn't found? I'm running Rails 3.2.1. 回答1: Add this before you try to increment using the value of @video.id . raise ActiveRecord::RecordNotFound if @video.blank? Or use the bang

问题 I have the following code: #include <iostream> using namespace std; int foo() { throw 1; } struct A { int a; public: A() try : a(foo()) { cout << "Constructor A\n"; } catch(...) { cout << "Catched in A\n"; } }; struct B : A { B() { cout << "Constructor B\n"; ::foo(); } catch(...) { cout << "Catched in B\n"; } void foo() { } catch(...) { cout << "Catched in foo\n"; } }; int main () try { B b; return 0; } catch (...) { cout << "Catched in main\n"; } It outputs: Catched in A Catched in main Why

问题 When i run the command java -jar MyJar.jar i get the following errors : Exception in thread "main" java.lang.NullPointerException at sun.launcher.LauncherHelper.getMainClassFromJar(Unknown Source) at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source) What errors are these ? What could be the reason i am getting these errors ? Before I packed the packages in a jar file the scene was : Then i packed the above files along with the packages by entering : jar -cf MyJar.jar .\Design\*

问题 I can't for the life of me figure out why I can't catch this exception. Looking here at this guide. def get_team_names(get_team_id_url, team_id): print(get_team_id_url + team_id) try: response = urllib.request.urlopen(get_team_id_url + team_id) except urllib.error.HTTPError as e: print(e.code) print(e.read()) except urllib.error.URLError as e: print(e.code) print(e.read()) exception: Traceback (most recent call last): File "queue_cleaner_main.py", line 60, in <module> sys.exit(main()) File

问题 I have a tree and want to serialize them to xml. The nodes derive from a Nodebase class (found here I think), which fails on serializing. public class NodeBase : IEqualityComparer, IEnumerable, IEnumerable<NodeBase> { public NodeBase Parent { get; private set; } private readonly IList<NodeBase> children = new ObservableCollection<NodeBase>(); public NodeBase this[int index] { get { return this.children[index]; } } public void AddChild(NodeBase childNode, int index = -1) { if (index < -1) {

问题 I am using selenium with a python client. When doing selenium.delete_all_visible_cookies I get the exception: ERROR: Command execution failure. Please search the forum at http://clearspace.openqa.org for error details from the log window. The error message is: malformed URI sequence The log window's error is: error(1254427481456): Exception details: message -> malformed URI sequence, fileName -> http://localhost:4444/selenium-server/core/scripts/selenium-browserbot.js, lineNumber -> 1169,

问题 I want to map two classes with a manyToOne /oneToMay relation with Apache OpenJPA 2.2.0. One classe has a primary key of two attributes: @Entity(name = "Player") @IdClass(PlayerId.class) public class Player { @Id private String nickname; @Id @ManyToOne(cascade = CascadeType.PERSIST) @JoinColumn(name = "team_id") private Team team; public Player() { } public String getNickname() { return nickname; } public void setNickname(String nickname) { this.nickname = nickname; } public Team getTeam() {

问题 I was led to believe that the difference between Object.find and Object.find_by_id is that find will raise a RecordNotFound exception whereas find_by_id simply returns nil if nothing is found. However, in my Rails 3 app if I attempt to search my Uploads model with a bogus id I get: ActiveRecord::RecordNotFound in UploadsController#show Couldn't find Upload with id=59 Request Parameters: {"id"=>"59"} Here is the line of code thats messing up: @upload = Upload.find_by_id(params[:id]) I'm using