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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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• logging one thread in Java using log4j

  - by Javier

  I have an web application written in Java, and I have a thread-pool. The application is huge, and I cannot make major changes, for example, I cannot change log4j. I am executing a batch process in the thread pool, and I want to log everything that goes is executed to execute that process. There will always be just one thread active in the thread pool. Any ideas of how can I do that?

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• How to display Kannada (Indic) Fonts in a Java application

  - by AJ

  I am trying to dislplay a kannda character in a Java app. String fonts[] = ge.getAvailableFontFamilyNames(); This shows that there is a font family by name "BRH Kannada" Font f = new Font("BRH Kannada", Font.PLAIN, 20); and then I do button.setFont(f); now when i set the button text, I have to ideally get the text on button to use the BRH kannada font. However, what and how should I give the string as?

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• Difference between Java Collection and Collections

  - by Nirmal

  Hello, all! I just want to know what the actual difference between Java Collection and Collections is. Thanks in advance!

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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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• Double operation problem Java

  - by Daniel G. R.

  When I do the following in Java: System.out.println(2.2-2.0); It unexpectedly prints the following: 0.20000000000000018 What is this and how can I avoid this?

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• Lightweight Java reporting engine

  - by tuler

  I'm looking for a lightweight java reporting engine to be embedded in an applet application. My first option was Jasper Reports, but the jar is over 2Mb, a little too heavy (and too bloated) for my needs. I don't know if there is modular jasper distribution, with funcionalities split in several jars (like html rendering, pdf, excel, compilation, runtime, etc). I need to preview the report using Swing and print it. PDF export is a plus.

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• Setting java locale settings

  - by Simon Tucker

  When I use the default java locale on my linux machine it comes out with the US locale settings, where do I change this so that it comes out with the correct locale?

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• Is there something like SqlAlchemy's SqlSoup for Java?

  - by Lokkju

  I'm looking for a Java ORM that works from database reflection - I need to just point it at a DB, and start being able to walk through the entire set of tables, etc. Ideas?

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• Java monospace draw string

  - by javaAmator

  Hello! How can I draw a String in Java (using Graphics2d) in monospace mode? I have a font that looks like LCD screen font, and I want to draw something like LCD label. I am using Digital 7 Mono font. Do you know where I can find another font that will be monospace and lcd (I wan to type only digitals)?

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• How to convert a scala.List to a java.util.List?

  - by Alex Baranosky

  I'm trying to use some Scala code and am having a hard time figuring out how to convert the Scala lists into standard Java lists. Any ideas?

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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 Interfaces Methodology

  - by Amir Rachum

  Hi all, I've been programming in Java for a few courses in the University and I have the following question: Is it methodologically accepted that every class should implement an interface? Is it considered bad practice not to do so? Can you describe a situation where it's not a good idea to use interfaces? Thanks.

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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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• 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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• 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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• 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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• 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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• 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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• 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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• 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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• reserved keywords in java

  - by abson

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

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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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• 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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