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  • Output to jTextArea in realtime

    - by Robert
    I have some code which takes a few minutes to process, it has to connect to the web for each string in a long array, each string is a url. I want to make it so that everytime it connects, it should refresh the jtextarea so that the user is not staring into a blank page that looks frozen for 20 min. or however long it takes. here is an example of something i tried and didnt work: try { ArrayList<String> myLinks = LinkParser.getmyLinksArray(jTextArea1.getText()); for (String s : myLinks) { jTextArea2.append(LinkChecker.checkFileStatus(s) + "\n"); } } catch (IOException ex) { JOptionPane.showMessageDialog(jTextArea1, "Parsing Error", "Parsing Error", JOptionPane.ERROR_MESSAGE); Logger.getLogger(MYView.class.getName()).log(Level.SEVERE, null, ex); }

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  • Is it possible to overwrite a static method in parent class?

    - by MartinDenny2069
    I have a static method defined in a base class, I want to overwrite this method in its child class, is it possible? I tried this but it did not work as I expected. When I created an instance of class B and invoke its callMe() method, the static foo() method in class A is invoked. public abstract class A { public static void foo() { System.out.println("I am base class"); } public void callMe() { foo(); } } Public class B { public static void foo() { System.out.println("I am child class"); } }

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  • Jetty 7 Continuations: How to *not* redispatch the request?

    - by Don Werve
    I'm using Jetty 7 continuations to implement some asynchronous processing. What I'm trying to do is start off the continuation (via .suspend()), and then hand the continuation off to some other object that will compose the response, which works fine. But Jetty keeps redispatching the response (with isInitial = false) to the servlet, and I don't want or need that, because the response is being dealt with by some other object. So, I'd like to find a way to explicitly not redispatch the request on timeout or expire, because I'm using an event-driven series of callbacks to actually produce the response.

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  • where should i put the configuration files in a webservice

    - by KItis
    Could some one help me on this problem. i have webservice , which reads data from configuration files. When i run this webservice from eclipse , i give absolute the path for these webservices of these configuration files , but when i shift the webservice in to server and run, it can not read the config file. so how can i solve this problem. is there a relative path that webservice can understand during run time.

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  • Perf4J Graph Output from Log File

    - by manyxcxi
    I currently have a long running process that I am trying to analyze with Perf4J. I currently have it writing results in CSV format to its own log file using the AsyncCoalescingStatisticsAppender and a StatisticsCsvLayout on the file appender. My question is; when I try and use the --graph option from the command line (using the perf4j jar) it isn't populating the data points- it isn't populating anything. Are my appenders set incorrectly? The log file contains hundreds (sometimes thousands) of data points of about 10 different tag names. <appender name="perfAppender" class="org.apache.log4j.FileAppender"> <param name="File" value="perfStats.log"/> <layout class="org.perf4j.log4j.StatisticsCsvLayout"> </layout> </appender> <appender name="CoalescingStatistics" class="org.perf4j.log4j.AsyncCoalescingStatisticsAppender"> <!-- The TimeSlice option is used to determine the time window for which all received StopWatch logs are aggregated to create a single GroupedTimingStatistics log. Here we set it to 10 seconds, overriding the default of 30000 ms --> <param name="TimeSlice" value="10000"/> <appender-ref ref="ConsoleAppender"/> <appender-ref ref="CompositeRollingFileAppender"/> <appender-ref ref="perfAppender"/> </appender>

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  • Draw a JButton to look like a JLabel (or at least without the button edge?)

    - by Electrons_Ahoy
    I've got a JButton that for various reasons I want to act like a button, but look like a JLabel. It doesn't actually have to be a JLabel under the hood, I just don't want the raised button edge to show up. Is there an easy way to turn off the "button look" for JButtons but keep all the button functionality? I could build some kind of composed subclass hyperbutton that delegated to a jlabel for display purposes, but I'm really hoping there's something along the lines of button.lookLikeAButton(false).

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  • JOptionPane to appear on selected JCheckBox

    - by Venno
    Hi all I am having some difficulties with adding a joptionpane in JcheckBox listener public void itemStateChanged(ItemEvent evt) { if(evt.getStateChange() == ItemEvent.SELECTED){ ///some code JOptionPane.showMessageDialog(null, "Message", "Alert", JOptionPane.INFORMATION_MESSAGE); } } so it works fine,but the problem is that the JCheckBox gets selected and immediately deselected how can I manage to fix this ? Cheers

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  • Limit Connections with semaphores

    - by Robert
    I'm trying to limit the number of connections my server will accept using semaphores, but when running, my code doesn't seem to make this restriction - am I using the semaphore correctly? eg. I have hardcoded the number of permit as 2, but I can connect an unlimited number of clients... public class EServer implements Runnable { private ServerSocket serverSocket; private int numberofConnections = 0; private Semaphore sem = new Semaphore(2); private volatile boolean keepProcessing = true; public EServer(int port) throws IOException { serverSocket = new ServerSocket(port); } @Override public void run() { while (keepProcessing) { try { sem.acquire(); Socket socket = serverSocket.accept(); process(socket, getNextConnectionNumber()); } catch (Exception e) { } finally { sem.release(); } } closeIgnoringException(serverSocket); } private synchronized int getNextConnectionNumber() { return ++numberofConnections; } // processing related methods }

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  • onchange force page submit

    - by cometta
    <form jwcid="@Form" listener="listener:updateStaff"> <select jwcid="staffselect@Select" multiple="ognl:false" validators="validators:required" onchange="this.form.submit()" listener="listener:updateStaff"> <span jwcid="@For" source="ognl:hrStaff" value="ognl:currentHrStaff" index="ognl:currentHrStaffIndex"> <option class="text11" jwcid="@Option" selected="ognl:hrStaffSelection[currentHrStaffIndex]" label="ognl:currentHrStaff"/> </span> </select> </form> when onchange on selectbox, this form will be submitted and my pageValidate() will be called follow by upadteStaff() listener method. I wonder, when such submission is fired, can onchange='' pass a flag ('selectboxisfired' string) that i able to capture inside pagevalidate() 'selectboxisfired'? this will allow my logic inside pagevalidate to indicate is triggered by selectbox.

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  • Get Cell RSSI(Network Signal Strength) on Android 1.5

    - by Brandon
    Is there any way to retrieve the current cellular Signal Strength (RSSI) on Android 1.5? I know there's a way to listen for signal strength updates through the TelephonyManager, but this seems to only give a "state," not a numeric value. Is using the RSSI field on a neighboring cell fairly accurate? I'm guessing not, but I'm running out of ideas.

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  • Jar dependencies to use jetty httpclient

    - by Alfred
    Hi all, I want to use the jetty httpclient(in netbeans) but have the least number of jar dependencies. I know I can import all jars from the jetty lib folder to my project but I would like to know what the minimum number of dependencies are and how you did find this out? Our there tools to find jar dependencies?

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  • Upgrading RAD JDK Version to 1.6

    - by Deena
    Hi, I am using RAD for development. For my application i need to upgrade my JDK compliance to 1.6 from 1.4. I have installed jdk 1.6 and added it to my installed JRE's. Now in the JDK compliance still 1.4 is shown, what should be done to set the JDK compliance to 1.6? Thanks in advance. Cheers, Deena

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  • lwjgl 101: How can I write applets?

    - by Vuntic
    I have a working app in lwjgl. It doesn't do much yet; I've just started, but it does compile and run like it's supposed to. I want to make it into an applet. I've followed the guide here, and I have an applet that runs nicely and displays text and such in the applet area and can access the functions of lwjgl (like Sys.alert), but I can't figure out how to get opengl to actually render. I've tried extending an AWTGLCanvas and calling this.add(myAWTGLCanvas), where this is the Applet that I'm using, but... nothing. The initGL() and paintGL() methods never get called. I wonder if I'm supposed to be doing something with Display, but that's not for applets, right? Help? Also: This counts as a "beginner" question, right? Edit: Here's a simplified version of what I have.

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  • Updating gzip library in jre

    - by Sarmun
    Is there a way to update gzip library that JRE uses? There is a bug in gzip library that is used by latest JRE, and it has been fixed in later version of gzip library, so I would like to make latest JRE work by updating just gzip.

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  • Reading annotation property in aspect

    - by Lukasz Koniecki
    How to read annotation property value in aspect? I want my Around advice to be executed for all joint points annotated with @Transactional(readonly=false). @Around("execution(* com.mycompany.services.*.*(..)) " + "&& @annotation(org.springframework.transaction.annotation.Transactional)") public Object myMethod(ProceedingJoinPoint pjp) throws Throwable { }

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  • How should I read from a buffered reader?

    - by Roman
    I have the following example of reading from a buffered reader: while ((inputLine = input.readLine()) != null) { System.out.println("I got a message from a client: " + inputLine); } The code in the loop println will be executed whenever something appears in the buffered reader (input in this case). In my case, if a client-application writes something to the socket, the code in the loop (in the server-application) will be executed. But I do not understand how it works. inputLine = input.readLine() waits until something appears in the buffered reader and when something appears there it returns true and the code in the loop is executed. But when null can be returned. There is another question. The above code was taken from a method which throws Exception and I use this code in the run method of the Thread. And when I try to put throws Exception before the run the compiler complains: overridden method does not throw exception. Without the throws exception I have another complain from the compiler: unreported exception. So, what can I do?

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  • Why is the setContextClassLoader() method placed on Thread ?

    - by Roman
    Why is the setContextClassLoader() method placed on thread ? What different thread have different classloaders? The question is what if i extended a classloader , loaded there some new classes. to the my custom classloader. Now , I want it to be the context classloader , so I call the method (Thread.currentThread().setContextClassLoader(loader)). Are these new classes awailable only in the context of the current Thread ? ( or how does it work ?) Thanks

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  • Coding Conventions - Naming Enums

    - by Walter White
    Hi all, Is there a document describing how to name enumerations? My preference is that an enum is a type. So, for instance, you have an enum Fruit{Apple,Orange,Banana,Pear, ... } NetworkConnectionType{LAN,Data_3g,Data_4g, ... } I am opposed to naming it: FruitEnum NetworkConnectionTypeEnum I understand it is easy to pick off which files are enums, but then you would also have: NetworkConnectionClass FruitClass Also, is there a good document describing the same for constants, where to declare them, etc.? Walter

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  • Custom Key Bindings in SWT

    - by Dimitar
    Hey all, Is it at all possible to add custom key bindings to buttons in SWT? I can't use & in the text of the button to set a mnenomic because my buttons have no text (only an image). Is there a good way to do this using key listeners or is there something like the input/action map in swing? Thanks in advance.

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  • Uncompress a TIFF file without going through BufferedImage

    - by Gert
    I am receiving large size CCITT Group 4 compressed TIFF files that need to be written elsewhere as uncompressed TIFF files. I am using the jai_imageio TIFF reader and writer to do that and it works well as long as the product _width * height_ of the image fits in an integer. Here is the code I am using: TIFFImageReaderSpi readerSpi= new TIFFImageReaderSpi(); ImageReader imageReader = readerSpi.createReaderInstance(); byte[] data = blobManager.getObjectForIdAndVersion(id, version); ImageInputStream imageInputStream = ImageIO.createImageInputStream(data); imageReader.setInput(imageInputStream); TIFFImageWriterSpi writerSpi = new TIFFImageWriterSpi(); ImageWriter imageWriter = writerSpi.createWriterInstance(); ImageWriteParam imageWriteParam = imageWriter.getDefaultWriteParam(); imageWriteParam.setCompressionMode(ImageWriteParam.MODE_DISABLED); //bufferFile is created in the constructor ImageOutputStream imageOutputStream = ImageIO.createImageOutputStream(bufferFile); imageWriter.setOutput(imageOutputStream); //Now read the bitmap BufferedImage bufferedImage = imageReader.read(0); IIOImage iIOImage = new IIOImage(bufferedImage, null, null); //and write it imageWriter.write(null, iIOImage, imageWriteParam); Unfortunately, the files that I receive are often very large and the BufferedImage cannot be created. I have been trying to find a way to stream from the ImageReader directly to the ImageWriter but I cannot find out how to do that. Anybody with a suggestion?

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