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  • How can a servlet always perform the same task?

    - by membersound
    I want a Servlet to perform always the same tasks. Regardless of if it is a GET or POST. At the moment I just call the doGet() from doPost(), which works fine. Then I tried overriding the service() method, and I thought it would just work the same way. But it does not! The code somehow gets executed, but the response does not generate the webpage: response.getWriter(); response.println(string); This code works for the doGet/doPost methods, but not for the service. Why? Servlet: class MyWebServlet extends HttpServlet { @Override public void service(ServletRequest request, ServletResponse response) { response.setContentType("text/html"); PrintWriter out = response.getWriter(); String string = "teststring"; out.println(string); } }

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  • Broken if statement

    - by Vladimir Nani
    Maybe I am crazy but how that could be? some == null is always false but debugger goes into if-statement body anyway. Any ideas? I have restarted visual studio I have cleaned every bin/obj folder It is not the case that i don`t understand that WindowsIdentity.GetCurrent() may return null. That was my first idea. var some = new object(); if (some == null) { throw new Exception("hi!"); } else { do(); } My code: private void GetCurrentWindowsIdentity() { var identity = WindowsIdentity.GetCurrent() if (identity == null) { throw new Exception(Errors.IdentityIsNullException); } try { if (CurrentAuthenticationWrapper.AuthenticationType == AuthenticationType.Windows) { CurrentLogin = _identity != null ? _identity.Name : string.Empty; } } catch (Exception ex) { ViewManager.ShowError(ex); } _identity = identity; }

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  • Doing extra initialisations on a MFC Dialog in Visual Studio C++ 2008 Pro

    - by theunanonim
    How do I make extra initializations on a modal dialog before calling DoModal(); ? The whole application is created using VS wizards. I have a main Dialog (the one that is created automatically when I select new MFC Application in Visual Studio 2008 Professional). When I click a button on this dialog I want to open another dialog and set a CString value into a CEdit control. my code: ... void MainDlg::OnClickedButtonX(){ SecondDialogClass Dlg2; Dlg2.asocVar2Cedit.SetWindowTextW(L"my text"); Dlg2.DoModal(); } //asocVar2Cedit is the associeted control variable to the //CEdit control on the second Dialog (Right Click > Add Variable.. in VSC++) ... this code generates at runtime a "Debug Assertion" error in winocc... Any ideas ? Thank you in advance.

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  • How can I fade in a JPanel & children?

    - by Christian 'fuzi' Orgler
    I know that I can fade in a panel, by adding the alpha value to the background color & a timer. But how can I fade in a panel with child components (like a JLabel)? EDIT _fadeTimer = new Timer(40, new ActionListener() { @Override public void actionPerformed(ActionEvent e) { if (_alpha == 255) { _fadeTimer.stop(); } else { pnl_hint.setBackground(new Color( bgColor.getRed(), bgColor.getGreen(), bgColor.getBlue(), (_alpha += 1))); pnl_hint.updateUI(); } } }); _fadeTimer.start();

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  • Java Webservice with generic methods

    - by danby
    Hi, I was wondering if it is possible to make a generic webservice method in java like this: @WebMethod public <T extends Foo> void testGeneric(T data){ However when I try to consume this with a Java client I get an error stating: [ERROR] Schema descriptor {http://####/}testGeneric in message part "parameters" is not defined and could not be bound to Java. I know it is possible to make a method that takes a parameter such as List and this generates correctly using JAX-WS. I don't mind if there is a solution that means I am tied to using only a particular technology. Thanks, Dan.

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  • Android XML file doesn't save

    - by Shane
    I'm writing a game with LibGDX, and I'm trying to save an XML file, but there's always an exception (java.io.FileNotFoundException: /data/Slugfest/teams/Team1.xml: open failed: ENOENT (No such file or directory)) when saving the file. This code saves the file. public void save() { try { TransformerFactory transformerFactory = TransformerFactory.newInstance(); Transformer transformer = transformerFactory.newTransformer(); DOMSource source = new DOMSource(doc); StreamResult result; if (Gdx.app.getType() == ApplicationType.Android) { result = new StreamResult(new File("/data/Slugfest/teams/" + name + ".xml")); } else { result = new StreamResult(new File(name + ".xml")); } transformer.transform(source, result); Gdx.app.log("Slugfest", "File saved."); } catch (TransformerException tfe) { Gdx.app.log("Slugfest", tfe.getLocalizedMessage()); } } My manifest file includes the WRITE/READ_EXTERNAL_STORAGE permissions, by the way.

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  • initializing properties with private sets in .Net

    - by Martin Neal
    public class Foo { public string Name { get; private set;} // <-- Because set is private, } void Main() { var bar = new Foo {Name = "baz"}; // <-- This doesn't compile /*The property or indexer 'UserQuery.Foo.Name' cannot be used in this context because the set accessor is inaccessible*/ using (DataContext dc = new DataContext(Connection)) { // yet the following line works. **How**? IEnumerable<Foo> qux = dc.ExecuteQuery<Foo>( "SELECT Name FROM Customer"); } foreach (q in qux) Console.WriteLine(q); } I have just been using the private modifier because it works and kept me from being stupid with my code, but now that I need to create a new Foo, I've just removed the private modifier from my property. I'm just really curious, why does the ExecuteQuery into an IEnumerable of Foo's work?

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  • A Better way? Finding ASP.NET controls, finding their id

    - by CSharp
    I have a method that finds all the controls, iterates through them, determines if they are a textbox,drop down list, etc.. retrieves their ID name, and depending on the ID name it will set a boolean statement (thus I would know if that section of the form is complete, and will email to a certain group of people) unfortunetly this is done with too many if statements and was wondering if I could get some help making this more manageable protected void getEmailGroup() { Control[] allControls = FlattenHierachy(Page); foreach (Control control in allControls) { if (control.ID != null) { if (control is TextBox) { TextBox txt = control as TextBox; if (txt.Text != "") { if (control.ID.StartsWith("GenInfo_")) { GenInfo = true; } if (control.ID.StartsWith("EmpInfo_")) { EmpInfo = true; } } } if (control is DropDownList) { DropDownList lb = control as DropDownList; if (lb.SelectedIndex != -1) { if (control.ID.StartsWith("GenInfo_")) { GenInfo = true; } if (control.ID.StartsWith("EmpInfo_")) { EmpInfo = true; } } } } } }

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  • Java, how to trace functions called

    - by user435657
    Hi all, I want to trace the beginning [& ending] of functions called in Java, like the following code: public void foo() { System.out.println("begin of foo()"); ... System.out.println("e-n-d of foo()"); } But maintaining of the dump code System.out.println is something tedious and error-prone, for there may be tens of thounds of function in an class. Any good idea can ease this work? I don't want dump statements all over the file. Implementation of both or one of the beginning & ending traces is perferd. But, if impossible, recordings of that the function has been called is also helpful. I mean not care the exact beginnig and ending, just tell that the function has been called.

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  • How to autosize a ModalWindow in wicket which is depend on content

    - by user1263633
    i am working on modalwindow but it does not autosizes when content of this window getting increased Also tell how to set scrollbar to Modalwindow if size of content is more. I want modalwindow autosizable please tell me simple code how to do this?? & what is the actual use of setOutputMarkupId(true)??? final ModalWindow modalpostyourView=new ModalWindow("modalpostyourView"); modalpostyourView.setPageMapName("modalpostyourView-1"); modalpostyourView.setCookieName("modalpostyourView-1"); modalpostyourView.setWidthUnit(""); add(modalpostyourView); modalpostyourView.setPageCreator(new ModalWindow.PageCreator() { @Override public Page createPage() { return new UserPost(ForumForm.this,modalpostyourView); } }); AjaxLink postyourView=new AjaxLink("postyourView") { @Override public void onClick(AjaxRequestTarget target) { modalpostyourView.show(target); } }; add(postyourView);

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  • Android use of an string array on another method

    - by spagi
    Hi all. Im trying to make an activity that has a multiple choice dialog after you push a button. In there you select from a list of things. But these things are received from a web method before the dialog appears. So I create a string array after I receive them inside the onCreate to initialise it there with the correct size. But my dialog method then cant get the array because propably its out of its scope. My code looks like this @Override protected Dialog onCreateDialog(int id) //Here is where the array is loaded to the multiple select dialog etc @Override public void onCreate(Bundle savedInstanceState) //Here is where i initialise the array and get its contents etc I cant initialise my array when the class starts because I dont know its size yet. This has to do something with the scopes of my variables and I am pretty confused

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  • Running a method after the constructor of any derived class

    - by Alexey Romanov
    Let's say I have a Java class abstract class Base { abstract void init(); ... } and I know every derived class will have to call init() after it's constructed. I could, of course, simply call it in the derived classes' constructors: class Derived1 extends Base { Derived1() { ... init(); } } class Derived2 extends Base { Derived2() { ... init(); } } but this breaks "don't repeat yourself" principle rather badly (and there are going to be many subclasses of Base). Of course, the init() call can't go into the Base() constructor, since it would be executed too early. Any ideas how to bypass this problem? I would be quite happy to see a Scala solution, too.

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  • call method in code behind from JQuery

    - by brajt
    I am trying to execute a method in ASP.NET from Jquery $.ajax({ type: "POST", contentType: "application/json; charset=utf-8", url: "MyMessages.aspx?id=66&epslanguage=sv/test", data: "{}", dataType: "json", error: function(xhr, err) { alert("readyState: " + xhr.readyState + "\nstatus: " + xhr.status); alert("responseText: " + xhr.responseText); }, success: function() { alert("it works" ); } }) code behind: [WebMethod] protected void test() { test.Text = "works"; } I get errormessage redayState: 4 and status 200 when I do this. I don't understand the problem. I am vey new at this. :)

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  • Manually setting object's position or have the object do it all?

    - by N. Lucas
    I'm stuck thinking about the best way to go about setting a line segment's position, I have a class Line(length, angle, previous) being called from a class Polygon.. Right now I have: public function Line(length:Number, angle:Number, previous:Line = null) { if (previous != null) { this.x = previous.end.x; this.y = previous.end.y; } /**/ } Now, is this the best practice or should I be doing: Polygon.addLine(length:Number, angle:Number):void { var previous = _line[_line.length - 1]; // Array containing all Lines var line:Line = new Line(length, angle, previous); line.x = previous.end.x; line.y = previous.end.y; /**/ }

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  • Forcing a templated object to construct from a pointer

    - by SalamiArmi
    I have a fictional class: template<typename T> class demonstration { public: demonstration(){} ... T *m_data; } At some point in the program's execution, I want to set m_data to a big block of allocated memory and construct an object T there. At the moment, I've been using this code: void construct() { *m_data = T(); } Which I've now realised is probably not the best idea... wont work under certain cirumstances, if T has a private assignment operator for example. Is there a normal/better way to do what I'm attempting here?

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  • iPhone/Obj-C - Archiving object causes lag

    - by Dylan
    Hi I have a table view, and when I delete a cell I am removing an item from an NSMutableArray, archiving that array, and removing the cell. However, when I do this, it is causing the delete button to lag after I click it. Is there any way to fix this? // Override to support editing the table view. - (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath { if (editingStyle == UITableViewCellEditingStyleDelete) { int row = [indexPath row]; [savedGames removeObjectAtIndex:row]; [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade]; //this line causing lag [NSKeyedArchiver archiveRootObject:savedGames toFile:[self dataFilePath]]; } } Thanks

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  • Why do we need the "event" keyword while defining events ?

    - by Puneet Dudeja
    I don't understand why do we need the "event" keyword while defining events, when we can do the same thing without using "event" keyword, just by using the delegates. e.g. public delegate void CustomEventHandler(int a, string b); public event CustomEventHandler customEvent; customEvent += new CustomEventHandler(customEventHandler); customEvent(1,"a"); // Raising the event Here if I remove the "event" keyword from the second line, then also I can raise the event by invoking the delegate. Can anybody please tell me why is this event keyword needed ?

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  • Simple question about C# if else statement

    - by ilkdrl
    Iam doing a simple website and when i press button, i should see weight in label.. i see but if text.maxlenght 6, i should see ERROR message in same label but repeat see weight in label. How can i solve this problem? protected void Button1_Click(object sender, EventArgs e) { double sayi1, sayi2, sayi3, hesap, sonuc; sayi1 = Convert.ToDouble(Tb1.Text); sayi2 = Convert.ToDouble(Tb2.Text); sayi3 = Convert.ToDouble(Tb3.Text); if (Tb1.MaxLength > 6 || Tb2.MaxLength > 6) { lbl1.Text = "ERROR."; } else { hesap = (((sayi1 - ((sayi1 - sayi2) / 2)) * ((sayi1 - sayi2) / 2)) / 40); sonuc = (hesap * sayi3) / 100; lbl1.Text = sonuc.ToString() + "kg"; } }

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  • android: ListView.setAdapter() is causing IllegalStateException. Not sure how to fix it.

    - by Stev0
    I'm trying to populate a listview with the contents of various ListAdapters based upon the results of a switch statement nested in an OnItemClickListener. When clicking the item, the application was force closing, so I ran it through the dev tools and android debugger. Eclipse is showing me the in the main thread that the application has suspended due an IllegalStateException. I have a marginal understanding of what the particular exception indicates, but not sure how to fix it, or what in my code is causing it to be thrown. Code as follows: final ListView lv = (ListView) findViewById(R.id.main_list); final String[] autos = getResources().getStringArray(R.array.auto_array); final ListAdapter la_auto = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_2, autos); And then further down in the portion dealing with the onclicklistener gallery.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView parent, View v, int position, long id) { switch(gallery.getSelectedItemPosition()) { case 0: lv.setAdapter(la_auto); break;

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  • Can we have an anonymous struct as template argument?

    - by nonoitall
    The title is pretty self-explanatory, but here's a simplified example: #include <cstdio> template <typename T> struct MyTemplate { T member; void printMemberSize() { printf("%i\n", sizeof(T)); } }; int main() { MyTemplate<struct { int a; int b; }> t; // <-- compiler doesn't like this t.printMemberSize(); return 0; } The compiler complains when I try to use an anonymous struct as a template argument. What's the best way to achieve something like this without having to have a separate, named struct definition?

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  • how to show image from ms access to jpanel in java netbeans

    - by Shiv
    I have used this code : private void okActionPerformed(java.awt.event.ActionEvent evt) { try { String Update = name.getText(); Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); Connection connection = DriverManager.getConnection("jdbc:odbc:NewPData"); PreparedStatement psmnt = connection.prepareStatement("SELECT Image FROM Table1 where Name='" + Update + "'"); ResultSet rs = psmnt.executeQuery(); Blob blob = rs.getBlob("Image"); int b; InputStream bis = rs.getBinaryStream("Image"); FileOutputStream f = new FileOutputStream("Image.jpg"); while ((b = bis.read()) >= 0) { f.write(b); } f.close(); bis.close(); icon = new ImageIcon(blob.getBytes(1L, (int) blob.length())); lblImage.setIcon(icon); } catch (ClassNotFoundException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } } Exception it show is java.lang.UnsupportedOperationException i have stored image first in ms access and now i want to show it on a label plz help

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  • Writing a line in a JTextArea from another class

    - by Christopher Nastovski
    I'm trying to use a Method in my class 'Visual' to write a line of code into a JTextArea and it prints when I call it from 'Visual' but when I call it from 'Login' It only prints Text into the Console, not to the TextArea. private static Visual Visual; Visual.WriteLine("I'm sorry, your username or password is incorrect. Please try again."); or private static Visual Visual = new Visual(); Visual.WriteLine("I'm sorry, your username or password is incorrect. Please try again."); Dont work form 'Login' But, WriteLine("Test"); works from 'Visual', the class that the method is in. Here's the method in 'Visual' public void WriteLine(String Text) { System.out.println(Text); SystemFeed.append(Text.toString() + "\n"); SystemFeed.setCaretPosition(SystemFeed.getDocument().getLength()); }

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  • fgets, sscanf, and writing to arrays

    - by alldavidsluck
    beginner question here, I haven't been able to find examples that relate. I'm working on a C program that will take integer input from stdin using fgets and sscanf, and then write it to an array. However, I'm not sure how to make fgets write to the array. #define MAXINT 512 char input[MAXINT] int main(void) { int i; int j; int count=0; int retval; while (1==1) { fgets(input, MAXINT[count], stdin); retval = sscanf(input, "%d", &i); if (retval == 1) { count = count++; } else if (retval != 1) { break; } } Would I simply put fgets in a for loop? or is it more complicated than that?

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  • Is it possible to reinterpret pointer as dimensioned array reference?

    - by aaa
    hi. Suppose I have some pointer, which I want to reinterpret as static dimension array reference: double *p; double (&r)[4] = ?(p); // some construct? // clarify template< size_t N> void function(double (&a)[N]); ... double *p; function(p); // this will not work. // I would like to cast p as to make it appear as double[N] Is it possible to do so? how do I do it?

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  • Is the old vector get cleared? If yes, how and when?

    - by user180866
    I have the following code: void foo() { vector<double> v(100,1); // line 1 // some code v = vector<double>(200,2); // line 2 // some code } what happened to the vector of size 100 after the second line? Is it gets cleared by itself? If the answer is yes, how and when it is cleared? By the way, is there any other "easy and clean" ways to change the vector as in line 2? I don't want things like v.resize(200); for (int i=0; i<200; i++) v[i] = 2;

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