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  • how to implement a callback in runnable to update other swing class

    - by wizztjh
    I have a thread like this public class SMS { class Read implements Runnable { Read(){ Thread th = new Thread(this); th.start(); } @Override public void run() { // TODO Auto-generated method stub while (true){ Variant SMSAPIReturnValue = SMSAPIJava.invoke("ReadSMS"); if (SMSAPIReturnValue.getBoolean()){ String InNumber = SMSAPIJava.getPropertyAsString("MN"); String InMessage = SMSAPIJava.getPropertyAsString("MSG"); } } } } } How do I update the message to another GUI class in the same package(I understand how to put nested class to another package ....). Should I implement a callback function in SMS class? But how? Or should I pass in the Jlabel into the class?

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  • Where does the compiler store methods for C++ classes?

    - by Mashmagar
    This is more a curiosity than anything else... Suppose I have a C++ class Kitty as follows: class Kitty { void Meow() { //Do stuff } } Does the compiler place the code for Meow() in every instance of Kitty? Obviously repeating the same code everywhere requires more memory. But on the other hand, branching to a relative location in nearby memory requires fewer assembly instructions than branching to an absolute location in memory on modern processors, so this is potentially faster. I suppose this is an implementation detail, so different compilers may perform differently. Keep in mind, I'm not considering static or virtual methods here.

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  • How can I make this code more generic

    - by Greg
    Hi How could I make this code more generic in the sense that the Dictionary key could be a different type, depending on what the user of the library wanted to implement? For example someone might what to use the extension methods/interfaces in a case where there "unique key" so to speak for Node is actually an "int" not a "string" for example. public interface ITopology { Dictionary<string, INode> Nodes { get; set; } } public static class TopologyExtns { public static void AddNode(this ITopology topIf, INode node) { topIf.Nodes.Add(node.Name, node); } public static INode FindNode(this ITopology topIf, string searchStr) { return topIf.Nodes[searchStr]; } } public class TopologyImp : ITopology { public Dictionary<string, INode> Nodes { get; set; } public TopologyImp() { Nodes = new Dictionary<string, INode>(); } }

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  • Ngen or compile to native code is better

    - by Raghav55
    I want to know which is one better native code generated is NGen.exe is better or run time conversion of IL to native code by JIT ? using System; public class Vehicle { public Vehicle() { } public string Name { get; set; } public string Model { get; set; } } class Program { static void Main(string[] args) { Vehicle aVech = new Vehicle(); aVech.Name = "BUS"; aVech.Model = "1980"; } }

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  • Freeing Java memory at a specific point in time

    - by Marcus
    Given this code, where we load a lot of data, write it to a file, and then run an exe.. void myMethod() { Map stuff = createMap(); //Consumes 250 MB memory File file = createFileInput(stuff); //Create input for exe runExectuable(file); //Run Windows exe } What is the best way to release the memory consumed by stuff prior to running the exe? We don't need this in memory any more as we have dumped the data to a file for input to the exe... Is the best method to just set stuff = null prior to runExecutable(file)?

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  • C++ error - returning a char array

    - by Yosy
    Consider the following code: char CeaserCrypt(char str[256],int key) { char encrypted[256],encryptedChar; int currentAsci; encrypted[0] = '\0'; for(int i = 0; i < strlen(str); i++) { currentAsci = (int)str[i]; encryptedChar = (char)(currentAsci+key); encrypted[i] = encryptedChar; } return encrypted; } Visual Studio 2010 gives an error because the function returns an array. What should I do? My friend told me to change the signature to void CeaserCrypt(char str[256], char encrypted[256], int key). But I don't think that is correct. How can I get rid of the compile error?

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  • How to access the backing field of a base class using fluent nhibernate?

    - by Akk
    How do i set the Access Strategy in the mapping class to point to the base _photos field? public class Content { private IList<Photo> _photos; public Content() { _photos = new List<Photo>(); } public virtual IEnumerable<Photo> Photos { get { return _photos; } } public virtual void AddPhoto() {...} } public class Article : Content { public string Body {get; set;} } I am currently using the following to try and locate the backing field but an exception is thrown as it cannot be found. public class ArticleMap : ClassMap<Article> { HasManyToMany(x => x.Photos) .Access.CamelCaseField(Prefix.Underscore) //_photos //... } i tried moving the backing field _photos directly into the class and the access works. So how can i access the backing field of the base class?

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  • How to continue copying on error with copyDirectory from FileUtils (Apache Commons IO 2.4)

    - by Exocom
    I am trying to copy files from one folder to another using the FileUtils method "static void copyDirectory(File srcDir, File destDir)" from apache commons io (2.4) with the following code: String srcDir = "/sourceDirectory/examples/"; String destDir = "/tmp/examples/"; try{ FileUtils.copyDirectory(new File(srcDir), new File(destDir)); } catch (IOException e){ e.printStackTrace(); } The file structure looks like the following: examples/ (read access) examples/.subdirectory (NO access) examples/file1.txt (read access) examples/file2.txt (read access) examples/subdirectory2/file1.txt (read access) examples/subdirectory2/file2.txt (NO access) The problem is, that in srcDir there are a few files and one subdirectory I don't have access to. FileUtils.copyDirectory throws an "java.io.FileNotFoundException: .subdirectory (Permission denied)" and aborts. Is it possible to ignore those files I don't have permission to and just copy all the other files I can read?

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  • Best Design Pattern to Implement while Mapping Actions in MVC

    - by FidEliO
    What could be the best practices of writing the following case: We have a controller which based on what paths users take, take different actions. For example: if user chooses the path /path1/hello it will say hello. If a user chooses /path1/bye?name="Philipp" it will invoke sayGoodBye() and etc. I have written a switch statement inside the controller which is simple, however IMO not efficient. What are the best way to implement this, considering that paths are generally String. private void takeAction() { switch (path[1]) { case "hello": //sayHello(); break; case "bye": //sayBye(); break; case "case3": //Blah(); break; ... } }

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  • How to increment a value using a C-Preprocessor?

    - by mystify
    Example: I try to do this: static NSInteger stepNum = 1; #define METHODNAME(i) -(void)step##i #define STEP METHODNAME(stepNum++) @implementation Test STEP { // do stuff... [self nextFrame:@selector(step2) afterDelay:1]; } STEP { // do stuff... [self nextFrame:@selector(step3) afterDelay:1]; } STEP { // do stuff... [self nextFrame:@selector(step4) afterDelay:1]; } // ... When building, Xcode complains that it can't increment stepNum. This seems logical to me, because at this time the code is not "alive" and this pre-processing substitution stuff happens before actually compiling the source code. Is there another way I could have an variable be incremented on every usage of STEP macro, the easy way?

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  • Generics limitation, or lack of skillz ?

    - by Two Shoes
    I want to define the following class as such: public class CollectionAttribute<E extends Collection<T>> { private String name; private E value; public CollectionAttribute(String name, E value) { this.name = name; this.value = value; } public E getValue() { return value; } public void addValue(T value) { value.add(T); } } This won't compile (cannot resolve symbol T). If I replace the class declaration with the following: public class CollectionAttribute<E extends Collection<?>> Then I can't reference the parametrized type of the collection. Am I missing something or have I reached a limitation with generics in Java ?

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  • How do I get the users location latitude and longitude?

    - by kevin Mendoza
    I need to access the users location in this method contained in the mainViewController -(void)loadAnnotations{ [mapView removeAnnotations:mapView.annotations]; CLLocationCoordinate2D workingCoordinate; workingCoordinate.latitude= //here i need the users latitude workingCoordinate.longitude= //here i need the users longitude NSLog(@" this is %@", workingCoordinate.latitude); iProspectLiteAnnotation *tempMine = [[iProspectLiteAnnotation alloc] initWithCoordinate:workingCoordinate]; [tempMine setTitle:@"Present Location"]; [tempMine setAnnotationType:iProspectLiteAnnotationTypeUser]; [mapView addAnnotation:tempMine]; } however the mainViewController is already set to <fipsideViewControllerDelegate> What should I add to the header file and the implementation file to poll the location Manager for the users current latitude and longitude?

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  • ListView created programmatically - emptyView doesn't show

    - by Yorick
    I've created custom ListView programmatically, and set view to show when ListAdapter is empty but nothing shows on the screen in that case, what can be wrong? public PlayerList(Context context, Activity activity) { super(context); mParent = activity; setOnItemClickListener( new OnItemClickListener() { public void onItemClick(AdapterView<?> parent, View view, int position, long id) { ... } }; List<PlayerInfo> players; players = getPlayerList(); // here size of players == 0 setAdapter(new PlayersAdapter(this.getContext(), R.id.player_name, players)); LayoutInflater vi = (LayoutInflater)mParent.getSystemService(Context.LAYOUT_INFLATER_SERVICE); emptyView = vi.inflate(R.layout.empty_view, null); // emptyView is View, and member of PlayerList this.setEmptyView(emptyView); }

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  • How to Dispose myClass with Garbage Collecter C#

    - by Ibrahim AKGUN
    Hi, I have a class and got a method that doin so many things in memory and need to be disposed when its jobs done.But i have looked for MSDN for solution.There is an example thats not solved my problem.When my Class is instanced and run this method my memory is getting bigger and bigger.How can i Dispose it when its job done ? Here is my CODES ; class Deneme { public Deneme() { } ~Deneme() { GC.Collect(); GC.SuppressFinalize(this); } public void TestMetodu() { System.Windows.Forms.MessageBox.Show("Test"); // This is my method that doing big jobs :) } } Deneme CCCX = new Deneme(); CCCX.TestMetodu(); CCCX = null; So i cant dispose it with this.

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  • Should a protected property in a C# child class hide access to a public property on the parent?

    - by Tim
    I have the following code: public class Parent { public string MyField { get; set; } } public class Child : Parent { protected new int MyField { get; set; } } I try and access this with: static void Main(string[] args) { Child child = new Child(); child.MyField = "something"; } Visual studio 2008 compiles this without comment, but under Mono (2.4.2, Ubuntu) I get the error message 'HideTest.Child.MyField' is inaccessible due to its protection level (CS0122) Is one implementation or the other more compliant with the standard here?

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  • How to test soft deletion event listner without setting up NHibernate Sessions

    - by isuruceanu
    I have overridden the default NHibernate DefaultDeleteEventListener according to this source: http://nhforge.org/blogs/nhibernate/archive/2008/09/06/soft-deletes.aspx so I have protected override void DeleteEntity( IEventSource session, object entity, EntityEntry entityEntry, bool isCascadeDeleteEnabled, IEntityPersister persister, ISet transientEntities) { if (entity is ISoftDeletable) { var e = (ISoftDeletable)entity; e.DateDeleted = DateTime.Now; CascadeBeforeDelete(session, persister, entity, entityEntry, transientEntities); CascadeAfterDelete(session, persister, entity, transientEntities); } else { base.DeleteEntity(session, entity, entityEntry, isCascadeDeleteEnabled, persister, transientEntities); } } How can I test only this piece of code, without configuring an NHIbernate Session?

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  • Can't update rows in my database using Entity Framework...?

    - by Dissonant
    Okay, this is really weird. I made a simple database with a single table, Customer, which has a single column, Name. From the database I auto-generated an ADO.NET Entity Data Model, and I'm trying to add a new Customer to it like so: using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace Test { class Program { static void Main() { Database1Entities db = new Database1Entities(); Customer c = new Customer(); c.Name = "Harry"; db.AddToCustomer(c); db.SaveChanges(); } } } But it doesn't persist Customer "Harry" to the database! I've been scratching my head for a while now wondering why such a simple operation doesn't work. What on earth could be the problem!?

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  • Saving Excel Spreadsheet using Interop C#

    - by Wesley
    static void Main() { Application excelapp = new Application(); Workbook book = excelapp.Workbooks.Open(@"C:\HWYFAB.xlsx", 0, false, 5, "", "", false, XlPlatform.xlWindows , "", true, false, 0, true, false, false); Worksheet sheet = (Worksheet)book.Sheets[1]; Range cell = (Range)sheet.Cells[3, 2]; Console.WriteLine(cell.Text); cell.ClearContents(); book.Close(true, "HWYFAB.xlsx", false); excelapp.Quit(); } This program runs and exits as expected. It does print the correct value that's in cell B3 to the console. When closing it asks if I want to replace the existing file. I click yes. When I open the spreadsheet in Excel, the value is still in cell B3 despite the cell.ClearContents(). Any thoughts?

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  • updated validation example for web api

    - by MonkeyBonkey
    I tried the validation example code for web api on the latest mvc 4 download and I'm getting some errors. Does anyone have an updated example of the ValidationActionFilter class. Here's the original code public class ValidationActionFilter : ActionFilterAttribute { public override void OnActionExecuting(HttpActionContext context) { var modelState = context.ModelState; if (!modelState.IsValid) { dynamic errors = new JsonObject(); foreach (var key in modelState.Keys) { var state = modelState[key]; if (state.Errors.Any()) { errors[key] = state.Errors.First().ErrorMessage; } } context.Response = new HttpResponseMessage<JsonValue>(errors, HttpStatusCode.BadRequest); } } } I'm getting an error on HttpResponseMessage The non-generic type 'System.Net.Http.HttpResponseMessage' cannot be used with type arguments Also it looks like I need to add a Json reference, but should I be using JSON.net instead? An example of this using Json.net?

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  • C++ vector<T>::iterator operator +

    - by Tom
    Hi, Im holding an iterator that points to an element of a vector, and I would like to compare it to the next element of the vector. Here is what I have Class Point{ public: float x,y; } //Somewhere in my code I do this vector<Point> points = line.getPoints(); foo (points.begin(),points.end()); where foo is: void foo (Vector<Point>::iterator begin,Vector<Point>::iterator end) { std::Vector<Point>::iterator current = begin; for(;current!=end-1;++current) { std::Vector<Point>::iterator next = current + 1; //Compare between current and next. } } I thought that this would work, but current + 1 is not giving me the next element of the vector. I though operator+ was the way to go, but doesnt seem so. Is there a workaround on this? THanks

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  • Retreiving data from grid view cell to a text box

    - by Bader
    Hello , i am trying to retrieve a cell data to a textbox , that will happen when i select any row in the grid view , the textbox will take the new value i already enabled auto post back to the textbox here is my code protected void GridView2_SelectedIndexChanged(object sender, EventArgs e) { TextBox3.Text = GridView2.Rows[GridView2.SelectedIndex].Cells[2].Text; } however , there is not error in the syntax , it doesn't retrieve any thing in the textbox , any suggestions ? i am using using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.Data.SqlClient; using System.Data.Sql; i work in C# , Visual studio 2010 express web developer

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  • What is the purpose of this delegate usage?

    - by Kev
    Whilst poking around some code in .NET Reflector in an app I don't have the source code for I found this: if (DeleteDisks) { using (List<XenRef<VDI>>.Enumerator enumerator3 = list.GetEnumerator()) { MethodInvoker invoker2 = null; XenRef<VDI> vdiRef; while (enumerator3.MoveNext()) { vdiRef = enumerator3.Current; if (invoker2 == null) { // // Why do this? // invoker2 = delegate { VDI.destroy(session, vdiRef.opaque_ref); }; } bestEffort(ref caught, invoker2); } } } if (caught != null) { throw caught; } private static void bestEffort(ref Exception caught, MethodInvoker func) { try { func(); } catch (Exception exception) { log.Error(exception, exception); if (caught == null) { caught = exception; } } } Why not call VDI.destroy() directly. Is this just a way of wrapping the same pattern of try { do something } catch { log error } if it's used a lot?

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  • Stupid java question: Is it a method?

    - by Stefan
    Hello, I'm no Java guy, so I ask myself what this means: public Button(Light light) { this.light = light; } Is Button a method? I ask myself, because it takes an input parameter light. But if it was a method, why would it begin with a capital letter and has no return data type? Here comes the full example: public class Button { private Light light; public Button(Light light) { this.light = light; } public void press() { light.turnOn(); } } I know, this question is really trivial. However, I have nothing to do with Java and haven't found a description for the Button thing above. I'm just interested.

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  • cannot create new object in ActiveDirectory

    - by Humanier
    Hi. I'm trying to add new object to existing organisational unit in Active Directory. Following code is used to do this. It runs without errors. But new object is not created after this. Please advise what I'm doing wrong here. using System.DirectoryServices; using System.DirectoryServices.ActiveDirectory; namespace TestAdObjectCreation { class Program { static void Main(string[] args) { DirectoryEntry root = new DirectoryEntry("LDAP://servername/OU=Services,OU=PCX,DC=q2q,DC=xenyq,DC=com", "Administrator", "pass"); DirectoryEntry newItem = root.Children.Add("test_node", "valid_schema_class_name"); root.CommitChanges(); root.Close(); root.Dispose(); } } }

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  • How to extract object reference from property access lamda

    - by Jim C
    Here's a follow-up question to http://stackoverflow.com/questions/2820660/get-name-of-property-as-a-string. Given a method Foo (error checking omitted for brevity): // Example usage: Foo(() => SomeClass.SomeProperty) // Example usage: Foo(() => someObject.SomeProperty) void Foo(Expression<Func<T>> propertyLambda) { var me = propertyLambda.Body as MemberExpression; var pi = me.Member as PropertyInfo; bool propertyIsStatic = pi.GetGetMethod().IsStatic; object owner = propertyIsStatic ? me.Member.DeclaringType : ???; ... // Execute property access object value = pi.GetValue(owner, null); } I've got the static property case working but don't know how to get a reference to someObject in the instance property case. Thanks in advance.

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