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  • Java: custom-exception-error

    - by HH
    $ javac TestExceptions.java TestExceptions.java:11: cannot find symbol symbol : class test location: class TestExceptions throw new TestExceptions.test("If you see me, exceptions work!"); ^ 1 error Code import java.util.*; import java.io.*; public class TestExceptions { static void test(String message) throws java.lang.Error{ System.out.println(message); } public static void main(String[] args){ try { // Why does it not access TestExceptions.test-method in the class? throw new TestExceptions.test("If you see me, exceptions work!"); }catch(java.lang.Error a){ System.out.println("Working Status: " + a.getMessage() ); } } }

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  • why it throws java.lang.classCastException

    - by matin1234
    Hi this is my class and I want to sort my stack but it will throw an exception please help me thanks! public class jj { public static void main(String[] args){ Stack<Integer> s = new ImplimentingAStackUsingAnArrayOfAGivenSizeN(5); s.push(1); s.push(3); s.push(5); s.push(2); s.push(4); Collections.sort((List<Integer>) (s)); System.out.println(s); while (!s.isEmpty()) { System.out.println(s.pop()); } } } the stack traces: run: Exception in thread "main" java.lang.ClassCastException: datastructurechapter5.ImplimentingAStackUsingAnArrayOfAGivenSizeN cannot be cast to java.util.List at datastructurechapter5.jj.main(jj.java:24) `Collections.sort((List<Integer>) (s));` Java Result: 1 BUILD SUCCESSFUL (total time: 2 seconds)

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  • ToolTip for a User Control Issue

    - by Gaddigesh
    I have a control inherited from usercontrol, I have implemented it such a way that it acts as XY Plane and displays curves. When user clicks and holds the mouse down for 1 sec i trigger SetToolTip to display tooltip indicationg (x,y) coordinates. Tooltip remains even on drag updating x,y positions System.Windows.Forms.ToolTip myToolTip = new System.Windows.Forms.ToolTip(); myToolTip.SetToolTip(myControl,"x= val,y=val"); It is working fine But Tooltip stops showing after (1)I play around for sometime(click,drag repeatedly) and will never show up (2)I move some other window on this control(this happens sporadically) what could be the problem???

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  • Copying data across tabs

    - by Guillermo
    Hello, I got two different forms in two different tabs. One has data from our system and the other one is an interface of another, external, system in wich we need to copy data into (XML or API integration not an option here) The this is that, having open both forms - in two different tabs - i need a greasemonkey script or something similar that allows my to copy data from one form to the other (using the getValue method in Javascript). The problem right now is that I cannot figure out how to reference with a greasemonkey script one particular tab or window (to rad data from or write data to). Do you think it would be possible to do what I'm thinking to do? THANKS

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  • Oracle Data Pump import to a sql file error :ORA-31655 no data or metadata objects

    - by Francisco Quiñones
    Hello, I'm using Data Pump to export/import data, one requirement is to import data to a sql file. The OS is window. I made the follow export : expdp system/password directory=dpump_dir dumpfile=tablesdump.dmp content=DATA_ONLY tables=user.tablename and it works, I can see the file TABLESDUMP.DMP in the directory path. then when I tried to import it to a sql file: impdp system/password directory=dpump_dir dumpfile=tablesdump.dmp sqlfile=tables_export.sql the log show : ..... ORA-31655 no data or metadata objects selected for job ..... and the sql file is created empty in the directory path. I'm not DBA, I'm a Java developer , Can you help me? Thks

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  • How can I use GLUT with CUDA on MACOSX?

    - by omegatai
    Hi, I'm having problems compiling a CUDA program that uses GLUT on MacOsX. Here is the command line I use to compile the source: nvcc main.c -o main -Xlinker "-L/System/Library/Frameworks/OpenGL.framework/Libraries -lGL -lGLU" "-L/System/Library/Frameworks/GLUT.framework" And here is the errors I get: Undefined symbols: "_glutInitWindowSize", referenced from: _main in tmpxft_00001612_00000000-1_main.o "_glutInitWindowPosition", referenced from: _main in tmpxft_00001612_00000000-1_main.o "_glutDisplayFunc", referenced from: _main in tmpxft_00001612_00000000-1_main.o "_glutInitDisplayMode", referenced from: _main in tmpxft_00001612_00000000-1_main.o "_glutCreateWindow", referenced from: _main in tmpxft_00001612_00000000-1_main.o "_glutMainLoop", referenced from: _main in tmpxft_00001612_00000000-1_main.o "_glutInit", referenced from: _main in tmpxft_00001612_00000000-1_main.o ld: symbol(s) not found collect2: ld returned 1 exit status I am aware that I haven't specified any lib for GLUT but I just can't find it! Does anybody know where it is? By the way, there doesn't seem to be a way to use the GLUT.framework when compiling with nvcc. Thanks a lot, omegatai

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  • Logging Mechanism using memory mapping technique

    - by Tushar
    Just create a mapping of the file of the required size (CreateFileMapping or mmap), write the lines in the buffer and start over when the maximum number is reached. -- Your answer for write-a-circular-file-in-c. I am also writing the LogWriter module. In this caase i am mapping the whole file to the memory using mmap(). I am maintaining the Read and Write pointers.I want to write the log to the file in append mode. Then when logger service is started first time it writes it appends the logs. But when system gets shutdown next time when i run the service it doesn't append the data at the end. I want to maintain the write and read offsets even if system shut down.How to achieve this ..? How to find the how much data is written to the log file. ??

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  • Creating keystore for jarsigner programmatically

    - by skayred
    I'm trying to generate keystore with certificate to use it with JarSigner. Here is my code: System.out.println("Keystore generation..."); Security.addProvider(new BouncyCastleProvider()); String domainName = "example.org"; KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA"); SecureRandom random = SecureRandom.getInstance("SHA1PRNG", "SUN"); keyGen.initialize(1024, random); KeyPair pair = keyGen.generateKeyPair(); X509V3CertificateGenerator v3CertGen = new X509V3CertificateGenerator(); int serial = new SecureRandom().nextInt(); v3CertGen.setSerialNumber(BigInteger.valueOf(serial < 0 ? -1 * serial : serial)); v3CertGen.setIssuerDN(new X509Principal("CN=" + domainName + ", OU=None, O=None L=None, C=None")); v3CertGen.setNotBefore(new Date(System.currentTimeMillis() - 1000L * 60 * 60 * 24 * 30)); v3CertGen.setNotAfter(new Date(System.currentTimeMillis() + (1000L * 60 * 60 * 24 * 365*10))); v3CertGen.setSubjectDN(new X509Principal("CN=" + domainName + ", OU=None, O=None L=None, C=None")); v3CertGen.setPublicKey(pair.getPublic()); v3CertGen.setSignatureAlgorithm("MD5WithRSAEncryption"); X509Certificate PKCertificate = v3CertGen.generateX509Certificate(pair.getPrivate()); FileOutputStream fos = new FileOutputStream("/Users/dmitrysavchenko/testCert.cert"); fos.write(PKCertificate.getEncoded()); fos.close(); KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType()); char[] password = "123".toCharArray(); ks.load(null, password); ks.setCertificateEntry("hive", PKCertificate); fos = new FileOutputStream("/Users/dmitrysavchenko/hive-keystore.pkcs12"); ks.store(fos, password); fos.close(); It works, but when I'm trying to sign my JAR with this keystore, I get the following error: jarsigner: Certificate chain not found for: hive. hive must reference a valid KeyStore key entry containing a private key and corresponding public key certificate chain. I've discovered that there must be a private key, but I don't know how to add it to certificate. Can you help me?

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  • Objective-C Plugin Architecture Security (Mac, not iphone)

    - by Tom Dalling
    I'm possibly writing a plugin system for a Cocoa application (Mac, not iphone). A common approach is the make each plugin a bundle, then inject the bundle into the main application. I'm concerned with the security implications of doing this, as the bundle will have complete access to the Objective-C runtime. I am especially concerned with a plugin having access to the code that handles registration and serial keys. Another plugin system we are considering is based on distributed notifications. Basically, each plugin will be a separate process, and they will communicate via distributed notifications only. Is there a way to load bundles securely (e.g. sandboxing)? If not, do you see any problems with using distributed notifications? Are there any other plugin architectures that would be better?

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  • Autofac / MVC4 / WebApi (RC) Dependency Injection issue after upgrading from beta

    - by George D.
    var resolver = new AutofacWebApiDependencyResolver(container); configuration.ServiceResolver.SetResolver(resolver); after updating to ASP.NET MVC4 (RC) I get the following error: 'System.Web.Http.HttpConfiguration' does not contain a definition for 'ServiceResolver' and no extension method 'ServiceResolver' accepting a first argument of type 'System.Web.Http.HttpConfiguration' could be found (are you missing a using directive or an assembly reference?) I realize after reading this (http://www.asp.net/web-api/overview/extensibility/using-the-web-api-dependency-resolver) that these interfaces have changed, but I am not sure how to apply this change to how I use Autofac. Do i need to wait for a new release from Autofac or is there another way I can get past this.

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  • OpenMP + SSE gives no speedup

    - by Sayan Ghosh
    Hi, My Professor found out this interesting experiment of 3D Linearly separable Kernel Convolution using SSE and OpenMP, and gave the task to me to benchmark the statistics on our system. The author claims a crazy 18 fold speedup from the serial approach! Might not be always, but we were expecting at least a 2-4 times speedup running this on a Dual Core Intel. http://software.intel.com/en-us/articles/16bit-3d-convolution-sse4openmp-implementation-on-penryn-cpu/#comment-41994 Alas, we could find exactly no speedup. The serial code performs always better, with or without OpenMP. I am using Linux, and observed a certain trend...when no other processes are running on the system, after a while the loadavg starts increasing, and the the %CPU utilization falls down. Another probable false positive which I ran into accidentally...I started the program, then immediately paused it. Then I ran it on background with bg, and saw a speedup of more than 2. This happens all the time! Any advice would be great. Thanks, Sayan

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  • DDK/WDM developing problem ... driver won't load on x64 windows platform

    - by user295975
    Hi there! I am a beginner at DDK/WDM driver developing field. I have a task which involves porting a virtual device driver from x86 to x64 (intel). I got the source code, I modified it a bit and compiled it succesfuly with DDK (build environments). But when I tried to load it on a ia64 Windows7 machine it didn't want to load. Then I tried some simple examples of device drivers from --http://www.codeproject.com/KB/system/driverdev.aspx (I put '--' to be able to post the hyperlink) and from other links but still the same problem. I hear on a forum that some libraries that you use to link are not compatible with the new machines and suggested to link to another similar libraries...but still didn't worked. When I build I use "-cefw" command line parameters as suggested. I do not have an *.inf file asociated but I'm copying it in system32/drivers and I'm using WinObj to see if next restart it's loaded into the memory. I also tried this program ( http://www.codeproject.com/KB/system/tdriver.aspx ) to load the driver into the memory but still didn't worked for me. Please please help me...I'm stuck on this and my deadline already passed. I feel I'driving nuts in here trying to discover what am I doing wrong.

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  • Catch database exception in Kohana

    - by danilo
    I'm using Kohana 2. I would like to catch a database exception to prevent an error page when no connection to the server can be established. The error displayed is system/libraries/drivers/Database/Mysql.php [61]: mysql_connect() [function.mysql-connect]: Lost connection to MySQL server at 'reading initial communication packet', system error: 110 The database server is not reachable at all at this point. I'm doing this from a model. I tried both public function __construct() { // load database library into $this->db try { parent::__construct(); } catch (Exception $e) { die('Database error occured'); } } as well as try { $hoststatus = $this->db->query('SELECT x FROM y WHERE z;'); } catch (Exception $e) { die('Database error occured'); } ...but none of them seemed to work. It seems as if no exception gets passed on from the main model. Is there another way to catch the database error and use my own error handling?

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  • Determine file creation date in Java

    - by Todd
    Hello, There is another similar question to mine on StackOverflow (How to get creation date of a file in Java), but the answer isn't really there as the OP had a different need that could be solved via other mechanisms. I am trying to create a list of the files in a directory that can be sorted by age, hence the need for the file creation date. I haven't located any good way to do this after much trawling of the web. Is there a mechanism for getting file creation dates? Thanks, Todd BTW, currently on a Windows system, may need this to work on a Linux system as well. Also, I can't guarantee that a file naming convention would be followed where the creation date/time is embedded in the name.

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  • Linker flags for one library break loading of another

    - by trevrosen
    I'm trying to use FMOD and HTTPriot in the same app. FMOD works fine until I add in linker flags for HTTPriot, at which point I get a bunch of linking errors wherein FMOD is complaining about undefined symbols. In other words, adding in linker flags for HTTPriot seems to break the loading of FMOD's library. These are the kinds of errors I'm getting, all coming during the linking phase of my build: Undefined symbols: "_FMOD_Sound_Lock", referenced from: -[FMODEngine recordedSoundAsNSData] in FMODEngine.o -[FMODEngine writeRecordingToDiskWithName:] in FMODEngine.o "_FMOD_MusicSystem_PrepareCue", referenced from: -[FMODEngine addCue:] in FMODEngine.o These are the linker flags for HTTPriot: -lhttpriot -lxml2 -ObjC -all_load I added those as well as a path to the HTTPriot SDK per the instructions here: http://labratrevenge.com/httpriot/docs/iphone-setup.html I was hoping someone could enlighten me on why adding linker flags for one library might cause a failure of another to load. If I DON'T have these flags in, HTTPriot and FMOD both work fine on the simulator, but HTTPriot has runtime errors on the device, I assume because its libraries are not linked. FMOD works fine on the device though. I placed header search paths and library search paths in my build settings in order for XCode to find FMOD. That seemed to be OK until I tried adding these HTTPriot linker flags. I also tried adding a linker flag for the FMOD library (-lfmodex), but I get the same errors as I do without it.

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  • Problem using DataGridView Control of VB.NET 2008

    - by Tareq
    Hi, I am using VB.NET 2008 based on Framework 3.5 I use a datagridview control on a form and the form's load event as follows: Private Sub frmServiceSettings_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load With dgvFinishedProduct Dim myCombo As New DataGridViewComboBoxColumn ... I generate the combo here from the result of my database .Columns.Add(myCombo) End With End Sub Now when i want to get the data that is set in this column, there is no problem. But if I want to set the data programmatically, there arises problem. How can I solve the problem? If you want more info, please let me know.

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  • sql exception when transferring project from usb to c:\

    - by jello
    I'm working on a C# windows program with Visual Studio 2008. Usually, I work from school, directly on my usb drive. But when I copy the folder on my hard drive at home, an sql exception is unhandled whenever I try to write to the database. it is unhandled at the conn.Open(); line. here's the exception unhandled Database 'L:\system\project\the_project\the_project\bin\Debug\PatientMonitoringDatabase.mdf' already exists. Choose a different database name. Cannot attach the file 'C:\Documents and Settings\Administrator\My Documents\system\project\the_project\the_project\bin\Debug\PatientMonitoringDatabase.mdf' as database 'PatientMonitoringDatabase'. it's weird, because my connection string says |DataDirectory|, so it should work on any drive... here's my connection string: string connStr = "Data Source=.\\SQLEXPRESS;AttachDbFilename=|DataDirectory|\\PatientMonitoringDatabase.mdf; " + "Initial Catalog=PatientMonitoringDatabase; " + "Integrated Security=True";

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  • Skip makefile dependency generation for certain targets (e.g. `clean`)

    - by Shtééf
    I have several C and C++ projects that all follow a basic structure I've been using for a while now. My source files go in src/*.c, intermediate files in obj/*.[do], and the actual executable in the top level directory. My makefiles follow roughly this template: # The final executable TARGET := something # Source files (without src/) INPUTS := foo.c bar.c baz.c # OBJECTS will contain: obj/foo.o obj/bar.o obj/baz.o OBJECTS := $(INPUTS:%.cpp=obj/%.o) # DEPFILES will contain: obj/foo.d obj/bar.d obj/baz.d DEPFILES := $(OBJECTS:%.o=%.d) all: $(TARGET) obj/%.o: src/%.cpp $(CC) $(CFLAGS) -c -o $@ $< obj/%.d: src/%.cpp $(CC) $(CFLAGS) -M -MF $@ -MT $(@:%.d=%.o) $< $(TARGET): $(OBJECTS) $(LD) $(LDFLAGS) -o $@ $(OBJECTS) .PHONY: clean clean: -rm -f $(OBJECTS) $(DEPFILES) $(RPOFILES) $(TARGET) -include $(DEPFILES) Now I'm at the point where I'm packaging this for a Debian system. I'm using debuild to build the Debian source package, and pbuilder to build the binary package. The debuild step only has to execute the clean target, but even this causes the dependency files to be generated and included. In short, my question is really: Can I somehow prevent make from generating dependencies when all I want is to run the clean target?

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  • Grouping Windows Forms Radiobuttons with different parent controls in C#

    - by Jerry
    Hi, I've got a Windows Forms application in which I have a number of RadioButtons. These RadioButtons are placed within a FlowLayoutPanel which automatically arranges them for me. All RadioButtons that are directly added to the FlowLayoutPanel are grouped, meaning I can select only one of them. However, some of these RadioButtons are paired up with a TextBox so I can supply some argument there. But to have all this arranged properly, I add a Panel control to the FlowLayoutPanel so I can control the alignment of the RadioButton and TextBox relatively to each other myself. These RadioButtons now have their own respective Panels as parent controls and thus are no longer included in the radio group with the other RadioButtons. I read that the the RadioButtons that are in the System.Web.UI namespace have a GroupName property, but unfortunately their System.Windows.Forms counterparts lack this property. Is there some other way I can group these radio buttons are am I going to have to handle onClick events myself? Thanks, Jerry

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  • attaching linq to sql datacontext to httpcontext in business layer

    - by rap-uvic
    Hello all, I need my linq to sql datacontext to be available across my business/data layer for all my repository objects to access. However since this is a web app, I want to create and destroy it per request. I'm wondering if having a singleton class that can lazily create and attach the datacontext to current HttpContext would work. My question is: would the datacontext get disposed automatically when the request ends? Below is the code for what I'm thinking. Would this accomplish my purpose: have a thread-safe datacontext instance that is lazily available and is automatically disposed when the request ends? public class SingletonDC { public static NorthwindDataContext Default { get { NorthwindDataContext defaultInstance = (NorthwindDataContext)System.Web.HttpContext.Current.Items["datacontext"]; if (defaultInstance == null) { defaultInstance = new NorthwindDataContext(); System.Web.HttpContext.Current.Items.Add("datacontext", defaultInstance); } return defaultInstance; } } }

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  • IIS7 and 301 permanment redirects using the location tag in web.config (ASP.NET MVC application)

    - by Mike
    I need to setup some 301 permanent redirects in the web.config of an ASP.NET MVC application running under IIS. The easiest way is to add a tag similar to the one below to the web.config file: <location path="TheMenu.aspx"> <system.webServer> <httpRedirect enabled="true" destination="menus/" httpResponseStatus="Permanent" /> </system.webServer> </location> When I go to the site at http://domain.com/TheMenu.aspx it redirects me to http://domain.com/menusxd instead of http://domain.com/menus What would be causing this? Thanks!

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  • java I/O is blocked while reading on socket when i put off the battery from device.

    - by gunjan goyal
    hi, i m working on client socket connection. client is a GPRS hardware device. i m receiving request from this client on my serversocket and then opening multiple threads. my problem is that when device/client close the socket then my IO detects that throws an exception but when i put off the battery from the device while sending the request to the serversocket it is blocked without throwing any exception. please help me out. thanks in advance. this is my code. try { while ((len = inputStream.read(mainBuffer)) -1) { System.out.println("len= " + len); }//end of while System.out.println("out of while loop");//which is never printed on screen. } catch (IOException e) { e.printStackTrace(); } regards gunjan goyal

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  • Raise the time-out for a single webservice

    - by Carra
    My web configuration looks as follows: <system.web> <compilation debug="false"/> <httpRuntime executionTimeout="90"/> </system.web> This is fine for most webservices but one webservice has a query that is running a very long (5 minutes) time and will be stopped before it has finished. Is it possible to set the runtime to 5 minutes for this webservice alone? I've thought about running the database query async (fire and forget) but it doesn't seem possible with sybase/oracle through ODBC.

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  • .net site all pages do a 302 redirect with AspxAutoDetectCookieSupport

    - by aron
    Hello, First let me say that I did see this article: http://stackoverflow.com/questions/1045283/how-to-remove-aspxautodetectcookiesupport However it seems like it fixes the url issue, but not the 302 AspxAutoDetectCookieSupport issue. I've also read just about every other article on the web about this issue. I could really use some help here. This is my web.config <sessionState mode="InProc" cookieless="false" timeout="6600" /> <membership defaultProvider="MySqlMembershipProvider"> <providers> <clear /> <add connectionStringName="SimpleTickConnection" applicationName="TheaterSales" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false" passwordFormat="Hashed" maxInvalidPasswordAttempts="15" minRequiredPasswordLength="7" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" passwordStrengthRegularExpression="" name="MySqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" /> </providers> </membership> <anonymousIdentification enabled="true" cookieless="AutoDetect" cookieProtection="All" cookieRequireSSL="false" cookieSlidingExpiration="true" /> Here's the entire web.config: http://support.simpletick.com/web-config-sample.txt

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  • How to develop asp.net web service to create the web method which can take the parameter of type win

    - by Shailesh Jaiswal
    I am developing asp.net web service. I am developing this web service so that OPC ( OLE for process control) client application can use it. In this web service I am using the built-in functions provided by the namespaces using OPC, using OPCDA, using OPCDA.NET. I have also added the namespace using System.Windows.Forms in this web service so that I can use the windows form control. In that we service I have created on web method which takes the parameter of type windows form control as given below. public void getOPCServerItems(TreeView tvServerItems, ListView lvBranchItems) { ArrayList ArrlstObj = new ArrayList(); ItemShowTreeList = OpcSrv.ShowBrowseTreeList(tvServerItems, lvBranchItems); ItemShowTreeList.BrowseModeOneLevel = true; // browse hierachy levels when selected. (default) ItemShowTreeList.Show(OpcSrv.ServerName); } In the above web method I need to pass the values to the built-in function ShowBrowseTreeList() (found in OPC, OPCDA, OPCDA.NET namespaces). This function takes the two parameter of windows form control type. These parameters are Treeview & ListView control of the windows form. In the above web method ShowBrowseTreeList() method automatically create the treeview & listview structure of the available items. Now as I am consuming the web service so I need to pass the values to the webmethod getOPCServerItems(). But as I my consuming application is asp.net application there is no such windows form control. In asp.net application there are also & control. I want to display The data returned in these asp.net controls rather than windows form control. I am not getting the way what should I need to do or how should I pass the values form my client application to this web service ? In the above method getOPCServerItems() when I use the parameter of type treeview & listview it generate s error "Cannot serialize member System.ComponentModel.Component.Site of type System.ComponentModel.ISite because it is an interface.". Can you provide me the the way In which I can write the above web method & how should I pass parameter to the Treeview & Listview control (windows form control) from my asp.net application ? which controls I should use to pass parameters ? Is there any need to do any type of casting ? Can you provide me the the code for above web method so that I can resolve the above issue ?

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