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• Refreshing data in a java.sql.ResultSet

  - by llm

  I have a java.sql.ResultSet object containg data from a query that was run. How do I refresh the data in the ResultSet to reflect the current data in the database? Thanks!

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• Creating an instance of a subclass extending an abstract class (Java)

  - by dacay

  In Java, is there any way to create an instance of any class that extends abstract class A, inside a member method of class A? Classes that extends abstract class A will return their instances with this method, but i don't want to implement same method in all subclasses with a "return this();" kind line.

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• Java Swing - good idea?

  - by Mike

  hi, simple question : I need to write cross platform application (basically CRUD). Is usage of Java Swing good idea? Or is it out-dated and you know better solution? I dont want to use like 5 languages for various stuff, one or two should be enough. Thanx!

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• Java socket programming header

  - by Andy

  Hi, I am trying to send a file through a java socket and receive it through another. However, this happens: Send Content: /* This is simply a file to transfer */ Received: ¨Ì

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• Is it worth learning C# or Java in 2010

  - by Dhawal

  We are in web era standalone applications are almost gone everyone wants their internet application to run inside browser, programming languages like Ruby, Python and scala are becoming more and more mainstream. Sometimes I wonder what these programming language offer which make them top choice of IT companies, if I plan to become a freelance web developer is it worth learning C# or Java. I read beginner's book for both of them, but to master any of them require some time investment.

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• Need example of Java Client Destop App consuming Two-way SSL Secured webservcie

  - by Rick

  I'm looking for an example of a java desktop application that consumes a Two-way SSL secured web service. Any tutorials or examples would be great, especially if they are based on the Eclipse IDE. Thanks.

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• Initializing an array in Java using the 'advanced' for each loop

  - by Corleone

  Is it possible to initialise an array in Java using the 'advanced' for loop? e.g. Integer[ ] numbers = new Integer[20]; int counter = 0; for ( Integer i : numbers ) { i = counter++; } for ( Integer i : numbers ) { System.out.println(i); } This prints all nulls, why is that?

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• Why do people run Java GUI's on the Event Queue

  - by asmo

  In Java, to create and show a new JFrame, I simply do this: public static void main(String[] args) { new JFrame().setVisible(true); } However, I have seen many people doing it like this: public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { new JFrame().setVisible(true); } }); } Why? Are there any advantages?

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• How to use a java scoket in tapestry5?

  - by shane87

  How do I implement a java socket in tapestry5? Should it go in the services sub-package? if so how do i use it?

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• Extending a Java Swing class in Clojure

  - by mikera

  I'm trying to extend a Java Swing component in Clojure, i.e. I want to extend a javax.swing.JComponent and add some custom methods implemented in pure Clojure in addition to all the standard inherited methods. I've tried using "proxy" which works great if I just want a single instance (in the same way as an anonymous inner class). However I'd really like a named class so that I can generate an arbitrary number of instances. What's the recommended way of doing this?

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• Assertion in Java?

  - by Praveen Chandrasekaran

  what is assert keyword in java? tell me some real time example to understand the key role of the assertion's need?

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• Any book for developing ecommerce website in Java

  - by Mirage

  I have seen that there many books titled 1)Build Ecommerce website in php 2)Build shopping cars in php or asp.net Is there any book which explains from scratch how to start building a website in java using any frame work or with servlets or jsp like 1)Basic form with logins and registration 2)building catalogue system 3)Building shopping cart 4)Building newletters system So i can strat reading it

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• Creating a simple java hash server

  - by Blankman

  Is it possible to create a simple server in Java that returns a response based on a given key? So it would be a simple program, that stores a hashmap and returns the result based on a key provided by the client. What would be the fasted implementation, to have it over HTTP or a socket? The client will be a web based application.

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• What are the things Java got wrong?

  - by Alon

  I read a lot of blogs and see people all the time talking about bad things in the java programming language; a lot of them are about annotations and generics that were added to the language in 1.5 release. What are the things in the language or the API that you don't like or would design differently?

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• How to find CPU-intensive class in Java?

  - by I.Randanad

  I have a big program in Java that uses multithreading. In some cases, the program starts using 100% of three cores of my eight core system. In normal use, the program use all cores at 1-2%. How can I find the class that's overloading cores?

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• a good Java guide

  - by Lo'oris

  Do you know a good guide for Java, such as "dive into python" for python? If I searched google I expect I would find tons of random guides, but trying them all until I found a good one could take ages... that's why I am asking: do you already know one in particular? one you KNOW is good? I already know C, PHP and a bit of Python, if that matters.

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• Getting scp's status bar to appear in a Java window

  - by pete

  I'm writing a program that uses scp to copy files in a bigger java program. As it stands now, the program freezes up while the scp is copying the file, which can take a few minutes, so I'd like to be able to display the progress of the scp or at the very least get the terminal window with the scp progress to show up! Any suggestions?

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• C++ / Java Textbook [closed]

  - by hkf

  Possible Duplicate: The Definitive C++ Book Guide and List What is the best text book a beginner (non-CS major) can buy to master C++? And for Java? Thanks

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• opensource websites backend in java

  - by zhangzhong

  Are there any opensource websites backend in java? Just like reddit in python, and openstreet in ruby.

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• Getting started with parser in java code

  - by giri

  Hi I am noob to parsers.I like to fetch specific data from a website I need to use parsers for that. Can anybody please tel me how to get started with parsers.What do I need to download? Can anybody the code to fetch the data from a website using parsers in java. Thanks in advance.

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• How can I create an image with Java?

  - by Roman

  I would like to create a gif image of a filled red circle on a green background. What is the easiest way to do it in Java?

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• Speeding up Math calculations in Java

  - by Simon

  I have a neural network written in Java which uses a sigmoid transfer function defined as follows: private static double sigmoid(double x) { return 1 / (1 + Math.exp(-x)); } and this is called many times during training and computation using the network. Is there any way of speeding this up? It's not that it's slow, it's just that it is used a lot, so a small optimisation here would be a big overall gain.

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• How to send a file over a network using socket channel in java

  - by sunil

  I want to write a socket channel program using which I can send a file from the client program to the server program. I want to create this program using Java. Is there any other on-line help is available So how to overcome this problem. Thanks Sunil Kumar Sahoo

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• Which CMS should i use for building website in java

  - by Mirage

  I use joomla to build php websites as it has logins , registrations and many extension to make my work easier. IS some cms available for building webistes in java with some pre loaded features so that i don't have to code it from scratch

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• Programatic Access to the Java Plug-in Control Panel

  - by Mike Caron

  Is there a way to access the Java Plug-in Control Panel programatically? Or at least find the places in the Windows File System where the information backing that control panel is stored?

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