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• Resolving Session Fixation in JBoss

  - by Warren Blanchet

  I need to prevent Session Fixation, a particular type of session hijacking, in a Java web application running in JBoss. However, it appears that the standard idiom doesn't work in JBoss. Can this be worked around?

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• Professional way to write project documentation

  - by EugeneP

  What tools and standards do you use to describe your project, database, modules, classes, their interaction for programmers, let's say after the project is finished. Do you use UML? Are there enterprise standards for Java developers, how to write such a documentation let's say from SUN? Are there specific tools that simplify this documentation process & compilation of neccessary docs. If there are good books on project documenting process, please give me links to Amazon.

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• Programmatically find complement and supplement of colors?

  - by Mohit Deshpande

  Is there a way to find the complement or supplement of a color given its RGB values? Or can it only be found for certain colors? How would someone go about doing this in Java?

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• Open an external program in Qt with an attached file extension

  - by Phil

  I am making a qt application which allows the user to select a file and then upon clicking ok, start the associated program with the file already loaded. The program I want to start is java based, and I know how to use QProcess to get it to open, I don't know however how to add the file extension which the user is selecting. Any suggestions?

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• where can I get these kind of exercises to solve?

  - by flash

  Recently I did a Java programming exercise successfully which was sent by a recruiting firm, The problem statement goes like this 'There are two text files FI(records abt files and directory information) and FS(containing blocks of data) which represent a file Index and file System respectively and I was supposed to write a static read method in a class which will read the file from the FS depending upon the path string provided using FI' My question is where can I get these kind of exercises to solve, the complexity should be above average to tough.

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• StringIndexOutOfBoundsException: String index out of range 0

  - by Evan F

  I'm trying to write a program to take the first letter of the user input to generate a username. I'm trying to write it so that if the user leaves the input blank, then the letter that would otherwise be taken to generate the username defaults to the letter 'z'. Here is my full code: import java.util.Scanner; /** UsernameGenerator.java Generates a username based on the users inputs. @author: Evan Fravert */ public class UsernameGenerator { /** * Generates a username based on the users inputs. *@param args command line argument */ public static void main(String[] args) { // abcde String first; String middle; String last; String password1; String password2; int randomNum; randomNum = (int) (Math.random() * 1000) + 100; Scanner userInput = new Scanner(System.in); System.out.println("Please enter your first name:"); first = userInput.nextLine(); String firstLower = first.toLowerCase(); System.out.println("Please enter your middle name:"); middle = userInput.nextLine(); String middleLower = middle.toLowerCase(); System.out.println("Please enter your last name:"); last = userInput.nextLine(); int lastEnd = last.length()-1; String lastLower = last.toLowerCase(); System.out.println("Please enter your password:"); password1 = userInput.nextLine(); System.out.println("Please enter your password again:"); password2 = userInput.nextLine(); char firstLetter = firstLower.charAt(0); char middleLetter = middleLower.charAt(0); char lastLetter = lastLower.charAt(0); char lastLast = lastLower.charAt(lastEnd); if first.length() == 0) { firstLetter = 'z'; } else { firstLetter = firstLower.charAt(0); } System.out.println("Your username is " + firstLetter + "" + middleLetter + "" + lastLetter + "" + "" + lastLast + "" + randomNum); System.out.println("Your password is " + password1); System.out.println("Welcome " + first + " " + middle + " " + last + "!"); } }

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• searching the strings using starting characters in Jlist?

  - by Venkats

  I am creating a search list in java. If I enter the beginning letters, then the corresponding words which belongs to the letters will be display on the Jlist.For that is there any build in methods is there? Then how can i search the words with starting characters? Suggest me. Thank in advance..

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• Convert an ArrayList to an object array

  - by marionmaiden

  Hello, Is there a command in java for conversion of an ArrayList into a object array. I know how to do this copying each object from the arrayList into the object array, but I was wondering if would it be done automatically. I want something like this: ArrayList<TypeA> a; // Let's imagine "a" was filled with TypeA objects TypeA[] array = MagicalCommand(a);

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• Why my program creates empty .lck files?

  - by Roman

  I am trying to use Java Logger. I get my logger file (name.log) with the content I wish but I also get empty name.log.lck file. Why this file appears and how I can remove this behavior. Thank you in advance.

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• Disable JPanel with visual effect

  - by Ryan

  I'm looking for a good way to disable a JPanel. I'm using a MVC design for a Java Swing GUI. I want the JPanel to be disabled while the model is processing stuff. I've tried setEnabled(false). That disables user input on the JPanel, but I'd like it to be grayed out to add a more visual effect. Thanks in advance!

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• JUnit before and test

  - by shiva

  What is the use of a Junit before and Test package in java? how can i use it with netbeans?

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• How does the Eclipse debugger gets the information about private variables inside the class?

  - by flash

  this was an interview question posed to me..I vaguely answered it uses Java reflections..but I was not sure. how does that work?

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• File upload-download in its actual format.

  - by ras

  hi, I've to make a code to upload/download a file on remote machine. But when i upload the file new line is not saved as well as it automatically inserts some binary characters. Also I'm not able to save the file in its actual format, I've to save it as "filename.ser". I'm using serialization-deserialization concept of java. Thanks in advance.

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• Automation of EAR packing

  - by glebreutov

  I need to automate packing of Java EE projects into EAR archive in Eclipse. The most easy way, I think, is using Ant script. But writing of Ant from start is routine and long task. Is there a way to generate Ant script based on my actions in eclipse (like macros in MS Office)? Or, maybe, exists easier way to do this? Thanks!

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• Finding class files that Eclipse builds

  - by Bernhard V

  Hi. When Eclipse builds my workspace, I assume that it creates Java .class files. What else should otherwise deploy to my running JBoss AS? Do you know where I can find these class files that Eclipse temporarily creates?

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• I am looking for some kind of code by Contracts that I can use with Eclipse

  - by devoured elysium

  I've tried before some Eclipse plugin (I don't remember its name) but it was lacking a lot of features (generics, for example). Is there anything easy to set up that would run on the last version of Java? Thanks

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• topic for final year project

  - by Mrinal Shrivastava

  i am a computer science student and have just entered in my final year. i wanna do a project on something new and exciting in the field of networking dbms os or ai. i am proficient in java c, oracle and am improving my linux skills.. please give me some suggestions for hot topics..

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• How to make the generic return type of a method dependend of the parameter type?

  - by deamon

  I have a convert method, which takes a String and a class as arguments and constructs an object of the given class, which will be returned. The usage should look like this Something s = Converter.convert("...", Something.class) Is it possible to express this with Java generics? Something like: public static <T> T convert(String source, ??? TClass) What would be ????

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• too long line in manifest file while trying to create jar

  - by fadmaa

  I am getting a too long line error while trying to build a jar. the long line in the manifest file is the Class-Path line as the application uses a lot of third-party libraries. needless to say, I am using Windows :-( and Eclipse Java 1.6 I tried Class-Path: lib or Class-Path: lib/ but they did not work.

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• net.sf.json.JSONObject adds backslashes where it's not expected ?

  - by cx42net

  Hi there, I'm loosing my hair trying to figure out why net.sf.json.JSONObject add extra backslash where it shouldn't on my java code : JSONObject obj = new JSONObject (); obj.element ("column_name", "<a href=\"#\" title=\"test\">Test !</a>"); will output : <a href=\"#\" title=\"test\">Test !<\/a> with an extra "\" near <\/a. How can I avoid this behavior ? Thanks for your help !

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• How can I connect to a mysql db from a different server ?

  - by HJ-INCPP

  Hello, I have, let's say, a root website with mysql db on a remote server. I want to connect to that particular database (to make queries), from many other little websites (with lower priviledges). Can this be done? Language: jsp,java,php Thank you

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• What is the time complexity of TreeSet iteration?

  - by John Smith

  In my code, java treeset iteration is the dominant time factor. In looking at the system I believe that it is n*log(n) complexity. Can anyone verify this? I am thinking that by providing links backward from child node to parent node I could improve the performance.

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• JUnit @Rule to pass parameter to test

  - by 01

  I'd like to create rule to be able to do something like this @Test public void testValidationDefault(int i) throws Throwable {..} Where i is parameter passed to the test by @Rule. However I do get java.lang.Exception: Method testValidationDefault should have no parameters is there any way to bypass it and set the i parameter in the @Rule?

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• Sharing serial port (Modem protocol + dialer)

  - by debita

  Hi, I wanted to use this code to send archives with Xmodem: http://www.java2s.com/Code/Java/Network-Protocol/JModemsimplecommunicationsprogram.htm In this case, I want to establish a dialup connection between two computers and send a binary file. But this code doesn't let me set a phone number to dial after i setup the port and before I transfer the file. Is there any way of sharing the port with another application that dials the phone number?

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• Open source project. I want to participate in something

  - by user69514

  I am a senior in Computer Science. I want to be part of some open source project. I don't know what's available out there. Can anybody guide me? I'm good with Java, not that great with C and C++, but I know both. I also know some Cincom Smalltalk. Or if anyone has something good that they're working on I could help.

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