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• How to measure Java thread execution time?

  - by giolekva

  Hey, I want to measure thread execution time in Java. Now I'm monitoring thread start and end times, but I think it's not so accurate because thread could be suspended during it execution.

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• String array definition in JAVA

  - by Mohamed KALLEL

  Is it possible to define array in this way in JAVA, otherwise are there an alternative close this definition? private final int CONST_0= 0; private final int CONST_1= 1; private final int CONST_2= 2; private final int CONST_3= 3; private final String[] CONST_TXTRECORDS = new String[] {[CONST_0] = "test0", {[CONST_1] = "test1", {[CONST_2] = "test2", {[CONST_3] = "test3"};

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• calling a c++ function from java which uses some other function which refers include files

  - by navinbecse

  Hi all, i am trying to call a navite method defined in c++ from java, the function which i am trying to call refers some functions defined in header files and also the other functions defined by me... is it passible to call that?.. i am getting an error "error LNK2019-unresolved external symbol"..

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• Multiple java servlet authentication methods

  - by user355325

  Is it possible to have multiple authentication methods for a java servlet? For example, have form based authentication in addition to open id based authentication so users can choose how they log in.

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• Converting an image in 8-bit grayscale RAW image in java

  - by deejay08

  Please let me know how to convert a JPG/PNG/BMP image into a 8-bit grayscale RAW image in Java. Is it possible to obtain using ImageIO API?

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• java jsp : connecting to sql server tutorial?

  - by phill

  Can anyone recommend a tutorial on how to write a java servlet which connects to ms sql server and manages data? I'm trying to write something which pulls products out of one database and inserts them into a stored procedure located on another database. thanks in advance

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• Java - scan screen for color

  - by yper

  Hey, I would like java to scan screen for particular color. Any ideas if how to do that? Thanks

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• Push alerts to notification tray app in Java

  - by Rich Anderson

  Hi - how do I push server alerts to tray apps in java without using xmpp or other heavy protocols? Do you recommend a way to accomplish this? I was planning to write an app which uses URLConnection on a server equipped with Comet but I doubt if that would work as the client requires a JS to be invoked and URLConnection is not a browser.. What is the best way to push instead of using a proprietary client-server approach?

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• Generate images for html heading with Java servlet

  - by stephanos

  Hi, I found Facelift which can basically generate html headings as images (with "nice font") on the fly. Does something similar exist for Java (couldn't find one myself)? Cheers, stephanos

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• truncating number after decimal...through built in function in java

  - by sadia

  i want to truncate a number after decimal through a built in function in *java* (not javascript). for example: 69.80000000001 to 69.8 please guide.

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• How to generate Image at server side in java [ blob-> string_image -> *.png or .jpg ]

  - by Vaibhav Bhalke

  Hi All I want to generate image on server side. My Image is stored in server side's database in blob format and I am able to convert it into string_image; Then How to convert that string_image into actual .jpg or .png format. Actually I am posting attachment as image on users facebook' wall. How to generate Image at server side in Java? Is there any sample code to do it?

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• Eclipse Doesn't List Classes Within Java Packages

  - by Matt Robertson

  Usually when I'm typing a Java import statement in Eclipse or otherwise referencing a class via the packages that it is in, Eclipse shows a context menu with a list of all classes within that package. There have been several times, however, that it would only shows subpackages within a package and would not show classes within that package. Does anyone know why this is? It sounds like a setting/preference was changed, but I never knowingly changed anything related to this.

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• Java: What is the right way to convert String into a valid amount of money(BigDecimal)

  - by Midnight Blue

  Hi, I have to convert an incoming String field into a BigDecimal field that would represent a valid amount of money, for example: String amount = "1000"; BigDecimal valid_amount = convert(amount); print(valid_amount.toString())//1000.00 What is the right API to use convert a String into a valid amount of money in Java (eg: apache commons library)? Thanks in advance,

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• reserved keywords in java

  - by abson

  goto is a reserved keyword in java. Is it true? Why so?

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• Constantly check for change in Java?

  - by user329671

  How can I check for a boolean to change state over a given period of time, and if a change is made over that time period perform a method? Can any help please be given in Java. Thanks.

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• Can a Java class implement a C++ interface

  - by Tom Brito

  Is it possible to a Java class to implement a C++ interface (interface meaning a full abstract class)? Where can I read more about?

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• Java: Swap elements in LinkedList class

  - by Algorist

  Hi, I want to maintain order of the elements being added in a list. So, I used a linkedlist in Java. Now I want to be able to swap two elements in the linked list. First of all, I cannot find an elementAt method for linked list. Also, there is no way to add element at a specified position. Thank you.

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• Maven, Java, and custom files for deployment

  - by Marco

  Hi, i've a Java project managed by Maven2. The scenario i'm trying to solve is the following: in development mode i need to use some configuration files (for example, a hibernate.cfg.xml configured for the dev environment), while in production i need to exclude all the development specific files and configurations, and get instead some other ones for my production environment. How can i handle this situation? Thanks

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• I need to save a String to a text file using Java

  - by Justin White

  I am a beginner Java programmer. I am attempting to make a simple text editor. I have got the text from the text field into a variable that's a String, called "text". My question is, how can I save the contents of the "text" variable to a text file? Thank you!

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• Pagination in Google App Engine with Java

  - by newbie

  I need to create simple pagination of objects, but when I read manual I found out that query.setRange(5, 10); will fetch 10 objects, even when only 5 objects are needed. Is there anyway to fetch just needed objects? EDIT: I started bounty, so fi you can show me simple example code in Java that works, then I will accept you answer.

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• Background image in java

  - by Mona

  hi, i'm trying to put an image as a background of my interface in java , i tried to write a class that does that and using it , but is there a simpler way to do that . thanks

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• What's the fastest way to draw a Hello World in Java

  - by Mordan

  What's the fastest way to draw a Hello World on the screen as a GUI in Java, 1- by using the minimum number of classes. 2- with the least byte code executed 2- the JVM tweaks so when I double click on the Jar file in Windows, the Hello World appears in no time (assuming the Runtime is not already loaded).

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• How to display an image(all major formats), selected by JFileChooser in java

  - by Tushar Maroo

  I am developing an image editing app, so want to display an image selected by JFileChooser, so what would be best approach so that it can display all formats jpg, png, gif etc. OpenButton is used for invocation of filechooser. private void OpenActionPerformed(java.awt.event.ActionEvent evt) { int returnVal = fileChosser.showOpenDialog(this); if (returnVal == JFileChooser.APPROVE_OPTION) { File file = fileChosser.getSelectedFile(); // What to do with the file // I want code for this part try { //code that might create an exception } catch (Exception e1) { e.printStackTrace(); } } }

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• Can Haml be used in Java web apps?

  - by Yen

  I hear about Haml as a templating engine mostly in the Ruby world. Can it also be used in Java projects?

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• How would someone implement mathematical formulae in java?

  - by Mohit Deshpande

  What I mean is like have to user input a string with multiple variables and get the value of those variable. Like a simple quadratic formula: x^2 + 5x + 10. Or in java: (Math.pow(x,2)) + (x * 5) + 10The user would then enter that and then the program would solve for x. I will be using the BeanShell Interpreter class to interpret the string as an equation. But how would I solve for x?

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