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• Java: Is there a way to obtain the bytecode for a class at runtime?

  - by Adam Paynter

  In Java, is there a way (at runtime) to obtain the bytecode which defined a particular class? Put another way, is there a way to obtain the byte[] array passed to ClassLoader.defineClass(String name, byte[] b, int off, int len) when a particular class was loaded? I see that this method is declared final, so creating a custom ClassLoader to…

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• Can all the attibutes of a node in an XML be grouped using JAVA?

  - by Kris

  I am trying to re-arrange all the attributes of the XML file. Need to group all the attributes of each node. Here is the required output XML file: …

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• How to delete specific record from Google Datastore (in Java) ?

  - by Srivigneshwar

  I have some records in datastore, I want to delete a specific record from the table. for example in SQL , we use delete * from table1 where name ="mike" what is the equivalent code in java (I m using Eclipse with Google appengine API plugin)? or any other method to do that?

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• What tool for printing Invoices and similar documents in Java Swing?

  - by Jonas

  I'm looking for a good tool for printing Invoices, Receipts and similar documents in Java Swing. I have tried JasperReports but it is pretty hard to get a dynamic layout and it is designing for reports. A requirement that I have is that the document should be sent directly to the printer and must not be saved to a file. So some tools that…

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• What are the SEO-unfriendly Java things a webapp developer should be aware of?

  - by Webinator

  This is a serious question (see my comment). The question is simple: what are all the SEO-unfriendly things Java is doing that will make your website rank not as well as it should in the major search engines?

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• How can I use Java to place a jpg file into the clipboard, so that it can be pasted into any documen

  - by Mike King

  I often have to add my signature to a document. The document can be of different kinds. My signature is stored as an image in signature.jpg. I would like to write a Java program that automatically places this image in the clipboard, so that I only have to paste it into the document.

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• why does java's URL class not recognize certain protocols ?

  - by trinity

  Hello all , URL u=new URL("telnet://route-server.exodus.net"); This line is generating : java.net.MalformedURLException: unknown protocol: telnet And i encounter similar problems with other URLs that begin with "news://" These are URLs extracted from ODP , so i dont understand why such exceptions arise..

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• How do I create a thread-safe write-once read-many value in Java?

  - by Software Monkey

  This is a problem I encounter frequently in working with more complex systems and which I have never figured out a good way to solve. It usually involves variations on the theme of a shared object whose construction and initialization are necessarily two distinct steps. This is generally because of architectural requirements, similar to…

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• Is there any real alternative to GeoServer as dynamic map generator in Java ?

  - by Costi Ciudatu

  I'm looking for the most suitable tool for generating dynamic geographical maps in Java (with styles based on custom business data: colors, labels etc. will be dynamically set). After some searching, only GeoServer (and the underlying GeoTools library) seems to fit. Although I'm really happy with this solution, I'm afraid I might miss…

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• How do I connect to an Access database over a LAN using Java?

  - by Relequestual

  Do you know of any good guides on how to access an Access database using Java? I know the basics and basic SQL, but I'm thinking more about access control.

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• Tips regarding how to create an Java Solitaire game.

  - by zo0mbie

  I got some question regarding the approach to create an solitaire game in java. What is the best way of handling the cards in Swing? How can I drag them, and what is the best way to snap them into their right positions?

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• Why are professors or schools picking Java over C++ to teach to students?

  - by Bryan Denny

  Is it just me or are most colleges teaching Java instead of C++ these days? I feel like I've been missing out with having zero classes teach or use C++ at all.

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• Java Terminology: Why compile-time error and not compile-time exception?

  - by Mandar

  This may sound awkward ... But I didn't understand it. Why do we have compile-time error and not compile-time exception in java ? I mean to say that we never say compile-time exception. We tend to say it as compile-time error. Is there any specific reason for the same ?? Any suggestions are welcomed.... Thanks !

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• How do I get Enterprise Achitect to use correct class relationships when importing java source code?

  - by Sam

  I've just imported some java source into 'Enterprise Architect', e.g: class Truck { BumperSticker bumperSticker; Vector<Wheel> wheels; } It's added the first member as an association, and it hasn't added the second as a relationship at all. How do I get it to instead, add them both as aggregations, the second with a…

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• How to add wordwrap for ChoiceElement in the ChoiceGroup while developing GUI using Java ME?

  - by sana

  While developing GUI using Java ME- I get the wordwrap for the text being shown on ChoiceGroup, but the text on the ChoiceElement doesn't get shifted to the new line if the length of the text exceeds the size of screen. How can we get the wordwrap for the text being shown on the ChoiceElement?

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• Why catch Exceptions in Java, when you can catch Throwables?

  - by corfield

  Hi We recently had a problem with a Java server application where the application was throwing Errors which were not caught because Error is a separate subclass of Throwable and we were only catching Exceptions. We solved the immediate problem by catching Throwables rather than Exceptions, but this got me thinking as to why you…

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• Should all resources in a java web application be uniquely named?

  - by morgancodes

  Trying to understand resources in java-land. I believe the following is true: Resources loaded via the classpath have no namespace, they only have a file name. It's wisest to always load resources via the classpath, never via the file system, even in unit tests. Therefore, resources must always have unique file names, or…

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• How does + operator behaves differently with numbers and strings in Java?

  - by Abhishek Jain

  Java does not have concept of operator overloading. Still + operator behaves as addition operator with numbers and concatenate operator with strings. This is similar to the operator overloading behavior. Please suggest.

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• How to execute task for a specific period in Java.?

  - by Zakaria

  In fact I would execute a specific task( a set of instructions) for a determined period. For example : I want my program to execute the task for 5 minutes, if it gets the right result it stops , else it will continue executing normal task for the 5 minutes and in the end it tells me. How can I implement this in Java.

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• How should I parse this simple text file in Java?

  - by Winston

  I have a text file that looks like this: grn129 agri- ac-214 ahss hud114 ahss lov1150 ahss lov1160 ahss lov1170 ahss lov1210 ahss What is the best way to parse this file using Java if I want to create a HashMap with the first column as the key and the second…

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• In java what is the diference between an object and a class?

  - by David

  In java what is the diference between an object and a class? The book i'm working from made it seem as though once a class is created it also exists as an object.

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• In java what is the difference between an object and a class?

  - by David

  In java what is the difference between an object and a class? The book I'm working from made it seem as though once a class is created it also exists as an object.

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• How to convert Hexadecimal to ASCII values in java?

  - by lakshmi

  Thanks for your answer... I have 31 32 2E 30 31 33 6byte hexadecimal number. I want to convert 31 32 2E 30 31 33 this 6 byte hexadecimal number into 12.013 ASCII number in java.

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• What Java/Scala or .NET web frameworks support modify source code and instantly run workflow e.i. wi

  - by Alexey

  As far as I can see the key advantage of dynamic languages like Ruby or Python over Java/Scala/C# etc is "hot" applying of your changes to source code to the running application. What are the frameworks for JVM or .NET that support the same workflow - apply changes to configuration and source code on the fly? Can they…

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• Eclipse IDE vs Netbeans IDE, which one is better for Java EE 6 development?

  - by CMW

  Hi, I would like to know which IDE is better for Java EE 6 development. Can anyone give me the comparison of these 2 IDE in terms of features? Thanks.

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