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  • Accessing a file (for writing) from a JBoss Web Service

    - by Andreas Grech
    Let's say I have this structure of my Java Web Application: TheProject -- [Web Pages] -- -- abc.txt -- -- index.jsp -- [Source Packages] -- -- [wservices] -- -- -- WS.java WS.java is my Web Service, which is situated in a wservices package. Now from this service, I need to access the abc.txt file and write to it. These are my urls: http://127.0.0.1:8080/TheProject/WS <- the webservice http://127.0.0.1:8080/TheProject/abc.txt <- the file I want to access To read the file, I tried with getResourceAsStream and I was successful in reading from it. But now I also want to write to this file, and I tried such a method but failed. Is there a way I can get access to the abc.txt file from WS.java and be able to successfully read from and write to it?

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  • MySQL DATE_ADD usage, 5 day interval

    - by Webnet
    I'm trying to select the order total sum ($) and invoice count over a 5 day period in a single query. I can't seem to get this to happen though. The current query I have is here... SELECT COUNT(id) as invoice_count, SUM(orderTotal) as orders_sum, UNIX_TIMESTAMP(created) as created FROM ids_invoice WHERE DATE_ADD(created, INTERVAL +1 DAY) AND userId = '.$userId.$whereSql I'm not entirely sure DATE_ADD is the right function I'm looking for I'm fairly new to mysql date functions so perhaps I just missed the function I needed when going through mysql docs.

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  • Scala unsatisfiable cyclic dependency in "table-layout" library (Toolkit class)

    - by Atol
    When I try to compile with sbt some code containing an instance of a Table from this library I get this error: java.lang.AssertionError: assertion failed: unsatisfiable cyclic dependency in 'class Toolkit' It seems to work with Java so I don't understand why it fails in Scala. Here is the toolkit class: http://code.google.com/p/table-layout/source/browse/branches/v1/tablelayout/src/com/esotericsoftware/tablelayout/Toolkit.java As long as I get this error I'm totally stopped in my project :(.

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  • remove component from initComponent()

    - by jouzef19
    hi i am using netBeans editor to create desktop application , i did something wrong that generate three line of code in the initComponent() method related to connection with database. Then i removed the lines by opening the .java file in txt editor , but one of them keep coming back when i do anything with netBeans editor , So i want to delete this line from the netbeans itself . this is the line historyList = java.beans.Beans.isDesignTime() ? java.util.Collections.emptyList() : ((javax.persistence.Query)null).getResultList(); and this is its declaration private java.util.List<idetect.History> historyList;

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  • Client/Server app

    - by Knowing me knowing you
    Guys could anyone tell me what's wrong am I doing here? Below are four files Client, main, Server, main. I'm getting an error on Client side after trying to fromServer.readLine(). Error: Error in Client Software caused connection abort: recv failed package client; import java.io.*; import java.net.*; import java.util.Scanner; public class Client { private PrintWriter toServer; private BufferedReader fromServer; private Socket socket; public Client( )throws IOException { socket = new Socket("127.0.0.1",3000); } public void openStreams() throws IOException { // // InputStream is = socket.getInputStream(); // OutputStream os = socket.getOutputStream(); // fromServer = new BufferedReader(new InputStreamReader(is)); // toServer = new PrintWriter(os, true); toServer = new PrintWriter(socket.getOutputStream(),true); fromServer = new BufferedReader(new InputStreamReader(socket.getInputStream())); } public void closeStreams() throws IOException { fromServer.close(); toServer.close(); socket.close(); } public void run()throws IOException { openStreams(); String msg = ""; Scanner scanner = new Scanner(System.in); toServer.println("Hello from Client."); // msg = scanner.nextLine(); while (msg != "exit") { System.out.println(">"); // msg = scanner.nextLine(); toServer.println("msg"); String tmp = fromServer.readLine(); System.out.println("Server said: " + tmp); } closeStreams(); } } package server; import java.net.*; import java.io.*; public class Server { private ServerSocket serverSocket; private Socket socket; private PrintWriter toClient; private BufferedReader fromClient; public void run() throws IOException { System.out.println("Server is waiting for connections..."); while (true) { openStreams(); processClient(); closeStreams(); } } public void openStreams() throws IOException { serverSocket = new ServerSocket(3000); socket = serverSocket.accept(); toClient = new PrintWriter(socket.getOutputStream(),true); fromClient = new BufferedReader(new InputStreamReader(socket.getInputStream())); } public void closeStreams() throws IOException { fromClient.close(); toClient.close(); socket.close(); serverSocket.close(); } public void processClient()throws IOException { System.out.println("Connection established."); String msg = fromClient.readLine(); toClient.println("Client said " + msg); } } package client; import java.io.IOException; public class Main { /** * @param args the command line arguments */ public static void main(String[] args) { // TODO code application logic here try { Client client = new Client(); client.run(); } catch(IOException e) { System.err.println("Error in Client " + e.getMessage()); } } } package server; import java.io.IOException; public class Main { /** * @param args the command line arguments */ public static void main(String[] args) { // TODO code application logic here Server server = new Server(); try { server.run(); } catch(IOException e) { System.err.println("Error in Server " + e.getMessage()); } } }

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  • differentiate same class name in two diffent jar files

    - by hunt
    I am developing blackberry application using BlackBerry JDE 5.0.X , in which i am using JSONOrg to parse json response now JSONOrg has few .java file which is using java.lang.Class from rt.jar file. so now the problem is BlackBerry JDE also has its version of java.lang.Class in net_rim_api.jar (which is a dependent jar file for BlackBerry) but i want to take a reference from rt.jar... so how can i differentiate a class which has a same name in two different .jar file ? Please do help..

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  • call method from main class, gives error

    - by user557039
    try to call method ss from class from it return me error, Blockquote Exception in thread "main" java.lang.NullPointerException at teste1.exp.ss(exp.java:16) at teste1.Main.main(Main.java:64) Java Result: 1 Blockquote <pre> public class Main { public static void main(String[] arguments) { ................... private static String[] ff; exp mega = new exp(); mega.ss(ff); } class exp { public void ss (String gvanswer[]){ String answer[] = new String[3]; answer[0] = "pacific "; answer[1] = "everest"; answer[2] = "amazon "; if (gvnswer[0].equals("pacific")) {System.out.println("eeeeeeeeeeeeee ");} if (gvanswer[1].equals(answer[1])){System.out.println("l ");} }

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  • Is there ever a good reason to store time not in UTC?

    - by landon9720
    I am wondering if there are any good reasons to ever store time information in anything other that UTC (GMT)? I believe that this is a solid rule for all software engineering. The conversion to local time is merely a translation that happens at the UI layer for display purposes. I have also seen cases where the translatation is needed in order to implement an algorithm correctly (for handling midnight date changes, etc.).

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  • Question on Books

    - by rockbala
    I am a learning SQL, HTML now. I would like to learn the following two more... Java, XML. I want to understand these two from testing and Web Services point of view. Is there a better order to learn the next two Java, XML or XML, Java?

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  • C++ corrupt my thinking, how to trust auto garbage collector?

    - by SnirD
    I use to program mainly with C/C++, that's make me dealing with pointers and memory management daily. This days I'm trying to develop using other tools, such as Java, Python and Ruby. The problem is that I keep thinking C++ style, I'm writing code as C++ usually written in almost every programming language, and the biggest problem is the memory management, I keep writing bad code using references in Java and just get as close as I can to the C++ style. So I need 2 thinks here, one is to trust the garbage collector, let's say by seeing benchmarks and proofs that it's realy working in Java, and know what I should never do in order to get my code the best way it can be. And the second think is knowing how to write other languages code. I mean I know what to do, I'm just never write the code as most Java or Python programmers usually do, are there any books for C++ programmers just to introduce me to the writing conventions? (by the way, forgive me for my English mistakes)

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  • Is it impossible to embed Java3D in a way that I don't need to install it?

    - by Kyle
    I'm running a big application and a small part of it includes Java 3D, the problem is many users need to use the code, but it isn't practical for everyone to install Java 3D just to run the application if they aren't even going to use that section of the application. Is it possible through compiling an extra jar, or changing some paths, to include Java 3D in a project without installing it on a system? Or perhaps to manually include any dlls?

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  • how to run frame one after the other

    - by user1758401
    I am developing an application where the valid user gets access to the main application. But a problem arises when I run main class. The LoginFrame and Main(Editor.java) Frame start simultaneously. I want to first validate the user and then direct the user to the main application. I am calling Loginform.java from my main application (i.e Editor.java) java.awt.EventQueue.invokeLater(new Runnable() { public void run() { new Login().setVisible(true); { Editor x = new Editor(); x.setVisible(true); } } });

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  • MDX , Calculate Number of days when the cummulative sum of Revenues from end of a month date match with the given debt amount.

    - by Shuchi
    Hi, I have a financial cube and i have to calculate Daily Sales Outstanding as : Number of Days between the selected month last date and the earliest transaction date when cummulative sum of Revenue from last date of the month till the date where sum revenue <= the debt amount for the date . e.g On 31/12/2009 my debt amount = 2,500,000 31-Dec-09 30-Nov-09 15-Oct-09 31-Oct-09 Revenue 1,000,000 1,000,000 500,000 1,0000 Cummulative sum of revenue 1,000,000 2,00,000 2,500,000 4,000,000 No of Days 31 30 16 On 15/Oct/09 cummulative revenue is 2,500,000 which equals my debt amount on that day Count of Days = 31 + 31 + 16 = 76 Days. In other words Sum Revenue from the selected date backwards until sum total equals or exeeds the total to date balance of the debtors. Any help will be highly appreciated . If i haven't explained clearly enough or if you need more information then please let me know. Thanks in advance . Shuchi.

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  • Javascript Debuuger plugin for eclipse

    - by vineth
    hi , I am new for java and iam doing the project with extjs & JAVA ,i using eclipse version (Eclipse Java EE IDE for Web Developers. Build id: 20100218-1602) . Can any one suggest any javascript debugging plugin for this id or pls provide link.. Thanks in advance

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  • Please suggest good book/website to for Threads and Concurrency?

    - by learner
    I have gone through Head First Java and some other sites but I couldn't find complete stuff related to Threads and additional concurrency packages at one place. Please suggest a book/website which covers complete Threads with more details like Synchronize and locking of objects More detailed about volatile Visibility issues in Threads java.util.concurrent package java.util.concurrent.atomic package

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  • Is it the most common case?

    - by Knowing me knowing you
    Why when I click on the x button to close the window in a Java application only the window dissapears and the applicaton is still running. I've read so many times that java designers tried to cater Java behaviour for the most common needs of programmers and save they precious time and so on and so on. What's more common case than closing app when I click on a X button?

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  • can constructors actually return Strings?

    - by elwynn
    Hi all, I have a class called ArionFileExtractor in a .java file of the same name. public class ArionFileExtractor { public String ArionFileExtractor (String fName, String startText, String endText) { String afExtract = ""; // Extract string from fName into afExtract in code I won't show here return afExtract; } However, when I try to invoke ArionFileExtractor in another .java file, as follows: String afe = ArionFileExtractor("gibberish.txt", "foo", "/foo"); NetBeans informs me that there are incompatible types and that java.lang.String is required. But I coded ArionFileExtractor to return the standard string type, which is java.lang.string. I am wondering, can my ArionFileExtractor constructor legally return a String? I very much appreciate any tips or pointers on what I'm doing wrong here.

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  • Where and why JVM checks that the return type of entry method main(String args[]) is void and not an

    - by akjain
    I will try to answer both, please correct me if I am wrong: Where: If a static method is being called using Classname.method() or using reflection then it doesn’t matter even if you change the return type of the calling method, the same method will still be called. So JVM probably checks this in one of the native methods of jvm.cpp methodHandle m (THREAD, init_klass-find_method(vmSymbols::object_initializer_name(), vmSymbols::void_method_signature())); if (m.is_null()) { ------ THROW_MSG_0 ……….. Why: Although it’s of useless to return a value from main, as java does not do anything with it but if we try to change the return type of main to int for example, JVM throws public static int main(String[] args) { return 1; } java.lang.NoSuchMethodError: main Exception in thread "main" So may be Java mandates the use of same signature for entry method main() to maintain a symmetry in all Java programs written.

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  • Can you have 2 completely independent instances of Eclipse running at the same time?

    - by froadie
    I'm sure there isn't really a way to do this, but figured it doesn't hurt to ask... I use Eclipse a lot. I'm currently using it for both Java and Python (with PyDev). I often find that I have one project open, with lots of files, say in Java... And then for some reason I have to switch to a Python project for a bit. I want to leave my Java project the way it is, and I don't just want to open tons of Python files in the same place because then I have too much open at once and get a headache and confused. Is there any way I can just leave the Java project exactly the way it is, and sort of open a completely new session of Eclipse? (sort of the way you can do with a browser) Or is this just wishful thinking?

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