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  • Java - Thread safety of ArrayList constructors

    - by andy boot
    I am looking at this piece of code. This constructor delegates to the native method "System.arraycopy" Is it Thread safe? And by that I mean can it ever throw a ConcurrentModificationException? public Collection<Object> getConnections(Collection<Object> someCollection) { return new ArrayList<Object>(someCollection); } Does it make any difference if the collection being copied is ThreadSafe eg a CopyOnWriteArrayList? public Collection<Object> getConnections(CopyOnWriteArrayList<Object> someCollection) { return new ArrayList<Object>(someCollection); }

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  • Strange lifecycle behaviour with f:ajax and valueChangedListener

    - by gerry
    I want to use the f:ajax tag to update a part of a page with a editor gui, which style depends on a selectOneMenu and its selected item. The problem is, that if the ajax is called the server first renders the editor and then executes the valueChangedListener method. In my JSF2.0 / Facelets app I've the following code: ... <h:selectOneMenu id="typeSelect" validator="#{addEntityBean.checkType}" value="#{addEntityBean.selectedTypeAsString}" valueChangeListener="#{addEntityBean.selectedTypeChanged}"> <f:ajax render="editorGrid"/> <f:selectItems value="#{addEntityBean.entityTypeListAsString}"/> </h:selectOneMenu> ... <h:panelGrid id="editorGrid" columns="2" binding="#{addEntityBean.dynamicEditorGrid}" /> The BackingBean code looks like this: public String getSelectedTypeAsString() { return selectedTypeAsString; } public void setSelectedTypeAsString(String selectedType) { this.selectedTypeAsString = selectedType; } public Class<? extends Entity> getSelectedType() { log.severe("getSelectedType"); Class<? extends Entity> res = null; if(selectedTypeAsString != null){ int index = entityTypeListAsString.indexOf(selectedTypeAsString); res = entityTypeList.get(index); } return res; } public void selectedTypeChanged(ValueChangeEvent event){ setSelectedTypeAsString((String)event.getNewValue()); Class<? extends Entity> clazz = getSelectedType(); if(clazz != null){ try { setEntity(clazz.newInstance()); } catch (Exception e) { log.severe(e); } } else{ setEntity(null); } } public HtmlPanelGrid getDynamicEditorGrid() { HtmlPanelGrid grid = DynamicHtmlComponentCreator.createHtmlPanelGrid(); Entity entity = getEntity(); if(entity != null){ log.severe("getEntity() -->"+entity.getClassName()); grid = (HtmlPanelGrid)buildGui(grid, entity, "entityBean.entity", false); } else log.severe("getEntity() --> null"); return grid; } The problem is, that the server logs show that at first the getDynamicEditorGrid() is executed. And later the selectedTypeChanged()-listener-method. So everytime the selected editor style type is update one selection later. I.e. after a page reload (the type is initally null) the user selects the A, now the getDynamicEditorGrid() is executed again with type null and after that the type is changed to A. Again the user selects now B (after A) and now the getDynamicEditorGrid() is executed with the type A and after that the type is changed to B. What is wrong with my code? How can I fix this really strange behavior...

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  • C Structure Pointer Problem

    - by Halo
    I have this struct; #define BUFSIZE 10 struct shared_data { pthread_mutex_t th_mutex_queue; int count; int data_buffer_allocation[BUFSIZE]; int data_buffers[BUFSIZE][100]; }; and I want to allocate one of the data_buffers for a process, for that purpose I execute the following function; int allocate_data_buffer(int pid) { int i; for (i = 0; i < BUFSIZE; i++) { if (sdata_ptr->data_buffer_allocation[i] == NULL) { sdata_ptr->data_buffer_allocation[i] = pid; return i; } } return -1; } but the compiler warns me that I'm comparing pointer to a value. When I put a & in front of sdata_ptr it calms down but I'm not sure if it will work. Isn't what I wrote above supposed to be true?

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  • Getting the value from asp:LinkButton's CommandArgument attribute using jquery/javascript

    - by LobalOrning
    I need to get the value of the CommandArgument attribute of a LinkButton, in an asp:Repeater. I have an asp:Repeater with 2 LinkButtons whose CommandArgument I set to a value: <ItemTemplate> <tr class="odd"> <td><%#DataBinder.Eval(Container.DataItem, "batch_id")%></td> <td><%#DataBinder.Eval(Container.DataItem, "productId")%></td> <td><%#DataBinder.Eval(Container.DataItem, "serial_number")%></td> <td><%#DataBinder.Eval(Container.DataItem, "activation_card_number")%></td> <td><%#DataBinder.Eval(Container.DataItem, "transaction_amount","{0:C}")%></td> <td><%#DataBinder.Eval(Container.DataItem, "response_dt", "{0:M/d/yyyy HH:mm:ss}")%></td> <td style="text-align:center;"><%#DataBinder.Eval(Container.DataItem, "resp_process_msg")%></td> <td style="text-align:center;"><%#DataBinder.Eval(Container.DataItem, "resp_response_code")%></td> <td style="text-align:center;"><asp:LinkButton ID="lnkBtnRestageAdd" CommandName="Add" CommandArgument='<%#Eval("activation_card_number")%>' runat="server" Text="stage" class="add" OnClientClick="return false;" /></td> <td style="text-align:center;"><asp:LinkButton ID="lnkBtnRestageMinus" CommandName="Subtract" CommandArgument='<%#Eval("activation_card_number")%>' runat="server" Text="stage" class="minus" OnClientClick="return false;" /></td> </tr> </ItemTemplate> I have suppressed the PostBack with OnClientClick="return false;" so that I can pop a jQuery dialog modal when the link buttons get clicked: if (btnAdd != null) { $(".add").click(function() { $("#<%=divDialogAdd.ClientID %>").removeAttr("style"); $("#<%=divDialogAdd.ClientID %>").dialog("open"); }); } In the modal I have 2 other asp:LinkButtons, and when the 'Yes' button is clicked I do the postback like so: yesBtn.click(function() { setTimeout('__doPostBack(\'btnAdd\',\'\')', 0); //need to add a param }); What I need to do, is somehow grab the CommandArgument value from the LinkButton in the Repeater, so that I can pass that as a parametere or assign it to a hidden field. I have tried jQuery's attr(), but that only works when the attribute was set using that function as well. How can I get this value, or what other way can I go about this?

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  • Returning a users lat lng as a string iPhone

    - by Joshmattvander
    Is there a way to return the users location as a string from a model? I have a model thats job is to download same JSON data from a web service. When sending in my request I need to add ?lat=LAT_HERE&lng=LNG_HERE to the end of the string. I have seen tons of examples using the map or constantly updating a label. But I cant find out how to explicitly return the lat and lng values. Im only 2 days into iPhone dev so go easy on me :)

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  • C++: Binding to a base class

    - by Helltone
    The following code works, but I'm not sure it is correct/portable. #include <iostream> #include <tr1/functional> class base { public: base(int v) : x(v) {} protected: int x; }; class derived : public base { public: bool test() { return (x == 42); } }; int main(int argc, char* argv[]) { base b(42); if(std::tr1::bind((bool (base::*)()) &derived::test, b)()) { std::cout << "ok\n"; } return 0; }

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  • improve my jquery validation plugin code

    - by Jared
    Hi All Just hoping soemone can help me to write better code than I can come up with on my own. I am using the jquery validation plugin. I have some fields that are mandatory ONLY if certain options are chosen. The below code works fine. But the thing is, is that that my list of 'OR's is much longer than I've put here. and it needs to be applied not just to 'directorsName' but a whole long list of inputs, selects etc. My question is.. how can I wrap up the code contained inside the RETURN? (so I dont have to keep repeating my 'OR's. I'm guessign I need a function but I'm unsure of the syntax) $("#myForm").validate({ rules: { directorsName : { required: function(element) { return ( $('#account_for').val() == "Joint" || $('#directors_number').val() == "2" || $('#directors_number').val() == "3" ); } } } }); Thanks in advance

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  • How to read modelstate errors when returned by Json?

    - by user281180
    How can I display modelstate errors returned by Json ? I want to do somthing like that... if (!ValidateLogOn(Name, currentPassword)) { ModelState.AddModelError("_FORM", "Username or password is incorrect."); //Return a json object to the javascript return Json(new { ModelState }); } What must be my code in the view to read the modelstate errors and display them? My actual code in the view is as follows to read the Json values: function createCategoryComplete(e) { var obj = e.get_object(); alert(obj.Values); }

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  • Can the lock function be used to implement thread-safe enumeration?

    - by Daniel
    I'm working on a thread-safe collection that uses Dictionary as a backing store. In C# you can do the following: private IEnumerable<KeyValuePair<K, V>> Enumerate() { if (_synchronize) { lock (_locker) { foreach (var entry in _dict) yield return entry; } } else { foreach (var entry in _dict) yield return entry; } } The only way I've found to do this in F# is using Monitor, e.g.: let enumerate() = if synchronize then seq { System.Threading.Monitor.Enter(locker) try for entry in dict -> entry finally System.Threading.Monitor.Exit(locker) } else seq { for entry in dict -> entry } Can this be done using the lock function? Or, is there a better way to do this in general? I don't think returning a copy of the collection for iteration will work because I need absolute synchronization.

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  • [C++] FillRect won't draw anything

    - by kaykun
    I'm trying to create a simple window in Win32 and draw a rectangle in it, but for some reason FillRect isn't working for me. Here's my source: #include <windows.h> #include "resource.h" RECT rect; LRESULT CALLBACK WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam) { static PAINTSTRUCT ps; static HDC hDC; switch(msg) { case WM_PAINT: hDC = BeginPaint(hWnd, &ps); FillRect(hDC, &rect, (HBRUSH)(COLOR_WINDOW+1)); EndPaint(hWnd, &ps); break; case WM_CLOSE: DestroyWindow(hWnd); break; case WM_DESTROY: PostQuitMessage(0); break; default: return DefWindowProc(hWnd, msg, wParam, lParam); } return 0; } int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) { WNDCLASSEX wc; HWND hWnd; MSG msg; rect.left = 0; rect.right = 0; rect.top = 100; rect.bottom = 100; wc.cbSize = sizeof(WNDCLASSEX); wc.style = 0; wc.lpfnWndProc = WndProc; wc.cbClsExtra = 0; wc.cbWndExtra = 0; wc.hInstance = hInstance; wc.hIcon = LoadIcon(NULL, IDI_APPLICATION); wc.hCursor = LoadCursor(NULL, IDC_ARROW); wc.hbrBackground = (HBRUSH)(COLOR_ACTIVEBORDER+1); wc.lpszMenuName = MAKEINTRESOURCE(IDR_MAIN_MENU); wc.lpszClassName = "Main"; wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION); RegisterClassEx(&wc); hWnd = CreateWindowEx(NULL, "Main", "Main", WS_SYSMENU | WS_MINIMIZEBOX, CW_USEDEFAULT, CW_USEDEFAULT, 240, 360, NULL, NULL, hInstance, NULL); ShowWindow(hWnd, nCmdShow); UpdateWindow(hWnd); while(GetMessage(&msg, NULL, 0, 0) > 0) { TranslateMessage(&msg); DispatchMessage(&msg); } return msg.wParam; } Is there something I'm missing or doing wrong in my code? Thanks in advance

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  • Jsf validation error (shown by h:message) while updating Model, why?

    - by Ignacio
    List.xhtml: <h:selectOneMenu value="#{produtosController.selected.codigo}"> <f:selectItems value="#{produtosController.itemsAvailableSelectOne}"/> </h:selectOneMenu> <h:commandButton action="#{produtosController.createByCodigos}" value="Buscar" /> Controller Class method: public String createByCodigos(){ items = new ListDataModel(ejbFacade.findByCodigos(current.getCodigo())); updateCurrentItem(); return "List"; } Facade Class method: public List<Produtos> findByCodigos(Integer codigo){ Query q = em.createNamedQuery("Produtos.findByCodigo"); q.setParameter("codigo", codigo); return q.getResultList(); } Bean Class query: @NamedQuery(name = "Produtos.findByCodigo", query = "SELECT p FROM Produtos p WHERE p.codigo = :codigo") @Column(name = "codigo") private Integer codigo;

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  • DataAnnotations: if (valid) => change Property

    - by Karl_Schuhmann
    hi i'm googling around about this problem but i didn't find any usfull about this. I want to deni the set of an property if the Validation per DataAnnotations fails Could you please tell me what i miss in my code? Model Codesnip private string _firstname; public string Firstname { get { return _firstname; } set { _firstname = value; RaisePropertyChanged(() => Reg(() => Firstname)); } } ViewModel Codesnip [Required] [RegularExpression(@"^[a-zA-ZäöüßÄÖÜß''-'\s]{2,40}$")] public string Name { get { return currentperson.Name; } set { currentperson.Name = value; RaisePropertyChanged(() => Reg(() => Name)); } } View Codesnip <TextBox HorizontalAlignment="Left" VerticalAlignment="Top" Width="120" Text="{Binding Firstname,UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True}"/> any help would be greatly appreciated

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  • What's wrong with consuming ConfiguredTaskAwaitable from PortableClassLibrary's class under Debugger from MSTest Runner or Console App?

    - by Stas Shusha
    *Its only Debug-time error, but a very weird one. Problem: While running with Debugger attached and calling a method, exposed in separate Portable library, returning ConfiguredTaskAwaitable, we get InvalidProgramException. Repro: Having 2 projects: PortableClassLibrary (supporting .Net 4.5; Windows Store; Windows Phone 8) with 1 class: public class Weird { public static ConfiguredTaskAwaitable GetConfiguredTaskAwaitable() { return new ConfiguredTaskAwaitable(); } } ConsoleApplication with code: static void Main(string[] args) { Weird.GetConfiguredTaskAwaitable(); } Notes: replacing ConfiguredTaskAwaitable with ConfiguredTaskAwaitable<T> (a generic version) fixes this strange issue consuming this method form WP8 or Win8 app under Debugger works fine. Currently it causes problems cause I cant run my Unit Tests under Debugger. I'm forced to change my "ObjectUnderTest" implementation to return generic ConfiguredTaskAwaitable<T>, which is fine for the real project, but still is only a workaround. The Question is: does anybody knows the reason of this error? It definitely related to Portable Class Library magic.

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  • Handling JSON and HTML templates in jQuery

    - by Toby Hede
    I have an ajax-enabled site that presents a lot of dynamic content by interpolating JSON values with HTML. This all works fine. BUT it means I have significant amounts of HTML all through my JavaScript. For example: var template = "<div>Foo: {bar}</div><div>Blah: {vtha}</div>"; template.interpolate({bar:"bar",blah:"vtha"}); I have cut this down a fair bit - some of my dynamic elements have quite a lot of HTML and a lot going on. I am using jQuery and I am building on Rails, so if there is something smart in either framework, that would be great. For reference, the String interpolation function used above is: String.prototype.interpolate = function (o) { return this.replace(/{([^{}]*)}/g, function (a, b) { var r = o[b]; return typeof r === 'string' || typeof r === 'number' ? r : a; } ); };

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  • What is the fastest way to get the persisted object after calling Hibernate's saveOrUpdate?

    - by Dave
    I'm using Hibernate 3.2.1.ga, hibernate annotations 3.2.1.ga, and hibernate-jpa-2.0-api. I can't upgrade at this time as I'm working with legacy code. I have this generic method for saving or updating objects ... protected void saveOrUpdate(Object obj) { final Session session = sessionFactory.getCurrentSession(); session.saveOrUpdate(obj); } You can assume that every argument, "obj," will have a member field that is marked with the "@Id" annotation. I would like to change the return type to return an Object that represents the persisted object in the database (meaning if "obj" didn't contain an id before, what is returned is the database object with a populated id. What is the fastest way to do this given my versioning and generic constraints?

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  • GoogleMaps API v3 - Need help with two "click" event scenarios. Need similar functionality to v2 AP

    - by Nathan Raley
    In version 2 of the API the map click event returned an Overlay, LatLng, Overlaylatlng. I used this to create a generic map event that would either retrieve the coordinates of the Map click event, or return the coordinates of a Marker or other type of Overlay. Now that API v3 doesn't return the Overlay or Overlaylatlng during the map click event, how can I go about creating a generic "click" event for the map that works if the user clicks on a marker or overlay? I really don't want to create a click event for each marker I have on my page as I am creating anywhere from a handful to a couple thousand markers. Also, I had to create a custom ImageMapType in order to display the StreetViewOverlay like we could do in v2 of the API because I couldn't find anywhere that told me how to add the StreetViewOverlay without the pegman icon. How can I go about retrieving the LatLng coordinates of a click on this overlay type as well?

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  • How to use this piece of code in a function

    - by oliverbj
    I have this jQuery code: var vis = (function(){ var stateKey, eventKey, keys = { hidden: "visibilitychange", webkitHidden: "webkitvisibilitychange", mozHidden: "mozvisibilitychange", msHidden: "msvisibilitychange" }; for (stateKey in keys) { if (stateKey in document) { eventKey = keys[stateKey]; break; } } return function(c) { if (c) document.addEventListener(eventKey, c); return !document[stateKey]; } })(); vis(function(){ document.title = vis() ? 'Visible' : 'Not visible'; }); What it does now is to change the document title of the page. If the page is not visible, it will be changed to that and vise verca. My question is, how can I use this function like this: if page is visible{ //do something } if page is not visible{ //do something else }

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  • Visual Studio 2010 and Test Driven Development

    - by devoured elysium
    I'm making my first steps in Test Driven Development with Visual Studio. I have some questions regarding how to implement generic classes with VS 2010. First, let's say I want to implement my own version of an ArrayList. I start by creating the following test (I'm using in this case MSTest): [TestMethod] public void Add_10_Items_Remove_10_Items_Check_Size_Is_Zero() { var myArrayList = new MyArrayList<int>(); for (int i = 0; i < 10; ++i) { myArrayList.Add(i); } for (int i = 0; i < 10; ++i) { myArrayList.RemoveAt(0); } int expected = 0; int actual = myArrayList.Size; Assert.AreEqual(expected, actual); } I'm using VS 2010 ability to hit ctrl + . and have it implement classes/methods on the go. I have been getting some trouble when implementing generic classes. For example, when I define an .Add(10) method, VS doesn't know if I intend a generic method(as the class is generic) or an Add(int number) method. Is there any way to differentiate this? The same can happen with return types. Let's assume I'm implementing a MyStack stack and I want to test if after I push and element and pop it, the stack is still empty. We all know pop should return something, but usually, the code of this test shouldn't care for it. Visual Studio would then think that pop is a void method, which in fact is not what one would want. How to deal with this? For each method, should I start by making tests that are "very specific" such as is obvious the method should return something so I don't get this kind of ambiguity? Even if not using the result, should I have something like int popValue = myStack.Pop() ? How should I do tests to generic classes? Only test with one generic kind of type? I have been using ints, as they are easy to use, but should I also test with different kinds of objects? How do you usually approach this? I see there is a popular tool called TestDriven for .NET. With VS 2010 release, is it still useful, or a lot of its features are now part of VS 2010, rendering it kinda useless? Thanks

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  • Technical non-terminating condition in a loop

    - by Snarfblam
    Most of us know that a loop should not have a non-terminating condition. For example, this C# loop has a non-terminating condition: any even value of i. This is an obvious logic error. void CountByTwosStartingAt(byte i) { // If i is even, it never exceeds 254 for(; i < 255; i += 2) { Console.WriteLine(i); } } Sometimes there are edge cases that are extremely unlikeley, but technically constitute non-exiting conditions (stack overflows and out-of-memory errors aside). Suppose you have a function that counts the number of sequential zeros in a stream: int CountZeros(Stream s) { int total = 0; while(s.ReadByte() == 0) total++; return total; } Now, suppose you feed it this thing: class InfiniteEmptyStream:Stream { // ... Other members ... public override int Read(byte[] buffer, int offset, int count) { Array.Clear(buffer, offset, count); // Output zeros return count; // Never returns -1 (end of stream) } } Or more realistically, maybe a stream that returns data from external hardware, which in certain cases might return lots of zeros (such as a game controller sitting on your desk). Either way we have an infinite loop. This particular non-terminating condition stands out, but sometimes they don't. A completely real-world example as in an app I'm writing. An endless stream of zeros will be deserialized into infinite "empty" objects (until the collection class or GC throws an exception because I've exceeded two billion items). But this would be a completely unexpected circumstance (considering my data source). How important is it to have absolutely no non-terminating conditions? How much does this affect "robustness?" Does it matter if they are only "theoretically" non-terminating (is it okay if an exception represents an implicit terminating condition)? Does it matter whether the app is commercial? If it is publicly distributed? Does it matter if the problematic code is in no way accessible through a public interface/API? Edit: One of the primary concerns I have is unforseen logic errors that can create the non-terminating condition. If, as a rule, you ensure there are no non-terminating conditions, you can identify or handle these logic errors more gracefully, but is it worth it? And when? This is a concern orthogonal to trust.

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  • How to set the ReturnUrl for the Login link in MVC 3 app?

    - by user762196
    using System; using Microsoft.Practices.Unity; namespace <MyNameSpace> { public class UrlFactory { public static UrlFactory Current { get { return HttpApplicationUnityContext.Current.Resolve<UrlFactory>(); } } public string GetLoginUrl() { return String.Format("{0}/login?ReturnUrl={1}", MyConfig.BaseHttpUrl, <GET_PAGE_URL>); } } The user can be on any page on the site and click the Login link. But the ReturnUrl must always point to the exact page where he clicked it. I must take the user back to the page he clicked the login link. In my code above, how do I get the page url in <GET_PAGE_URL>? Thanks

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  • How to use Externel Triggers on Oracle 11g..

    - by RBA
    Hi, I want to fire a trigger whenever an insert command is fired.. The trigger will access a pl/sql file which can change anytime.. So the query is, if we design the trigger, how can we make sure this dynamic thing happens.. As during the stored procedure, it is not workingg.. I think - it should work for 1) External Procedures 2) Execute Statement Please correct me, if I am wrong.. I was working on External Procedures but i am not able to find the way to execute the external procedure from here on.. SQL> CREATE OR REPLACE FUNCTION Plstojavafac_func (N NUMBER) RETURN NUMBER AS 2 LANGUAGE JAVA 3 NAME 'Factorial.J_calcFactorial(int) return int'; 4 / @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ SQL> CREATE OR REPLACE TRIGGER student_after_insert 2 AFTER INSERT 3 ON student 4 FOR EACH ROW How to call the procedure from heree... And does my interpretations are right,, plz suggest.. Thanks.

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  • without including #include<ctype.h>

    - by venkat
    Hi,i am written below program .... without including #include also i am able to execute the program.... where these prototype are declare? 1) include int main() { if(isalnum(';')) printf("character ; is not alphanumeric"); if(isalnum('A')) printf("character A is alphanumeric "); return 0; } 2) include int main() { printf("Lower case of A is %c \n", tolower('A')); printf("Lower case of 9 is %c \n", tolower('9')); printf("Lower case of g is %c \n", tolower('g')); printf("ASCII value of B is %d \n", toascii('B')); printf("Upper case of g is %c \n", toupper('g')); return 0; }

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  • Javascript: sort objects

    - by tom
    function Player() { var score; this.getScore = function() { return score; } this.setScore = function(sc) { score = sc; } } function compare(playerA, playerB) { return playerA.getScore() - playerB.getScore(); } var players = []; players['player1'] = new Player(); players['player2'] = new Player(); Array(players).sort(compare); I have code that is similar to the above. When I step through the code with a debugger, the compare function never gets called and the array isn't sorted. I'm not sure what's wrong with my code?

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  • searching for hidden files using winapi

    - by Kristian
    HI i want to search for a hidden files and directories in a specefic given path but I don't know how to do it for hidden files i do know how to search for normal files and dir i did this code but im stuck can't make it search for only hidden files #include "stdafx.h" #include <windows.h> int _tmain(int argc, _TCHAR* argv[]) { TCHAR *fn; fn=L"d:\\*"; HANDLE f; WIN32_FIND_DATA data; { FILE_ATTRIBUTE_HIDDEN; } f=FindFirstFile(fn,&data); if(f==INVALID_HANDLE_VALUE){ printf("not found\n"); return 0; } else{ _tprintf(L"found this file: %s\n",data.cFileName); while(FindNextFile(f,&data)){ _tprintf(L"found this file: %s\n",data.cFileName); } } FindClose(f); return 0; }

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  • how to go the middle of the singularly linked list in one iteration?

    - by u3050
    Recently I have been asked one question that in a singularly linked list how do we go to the middle of the list in one iteration. A --> B --> C --> D (even nodes) for this it should return address which points to B A --> B --> C (odd nodes) for this also it should return address which points to B There is one solution of taking two pointers one moves one time and other moves two times but it does not seem working here LinkedList p1,p2; while(p2.next != null) { p1 = p1.next; p2 = p2.next.next; } System.out.print("middle of the node" + p1.data); //This does not give accurate result in odd and even Please help if anyone has did this before.

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