I am looking to write to an excel (.xls MS Excel 2003 format) file programatically using Java. The excel output files may contain ~200,000 rows which I plan to split over number of sheets (64k rows per sheet, due to the excel limit). I have tried using the apache POI APIs but it seems to be a memory hog due to the API object model. I ...
The numerous (sigh...) logging frameworks for Java all do a nice job of showing the line number of the source file name for the method that created the log message: log.info("hey"); [INFO] [Foo:413] hey But if have a helper method in between, the actual caller will be the helper method, and that is not too informative. log_info("h...
What is the correct way to have a boolean checkbox in each row in a JSF / RichFaces dataTable? I tried the following snippet: <rich:dataTable id="customerList" var="_customer" value="#{customerList.resultList}" rendered="#{not empty customerList.resultList}" > <h:column> <h:selectBoolean...
My android app contains a suite of mini apps. In short, the main screen contains several icons, one each for the mini apps. When an icon is clicked, the mini app is launched. In total I have 4 mini apps. So you could imagine that my main screen is like the Home Screen Launcher. Although these mini apps could run standalone by their own,...
public static String removeNonDigits(final String str) { if (str == null || str.length() == 0) { return ""; } return str.replaceAll("/[^0-9]/g", ""); } This should only get the Digits and return but not doing it as expected! Any suggestions? ...
I'm tasked with converting an existing Java/C++ mixed web-application to pure Java, but I'm hampered by some missing Java sources (.java files) for which only the class-files are available. Fortunately I don't need to change anything in that code, just need to continue calling the methods. I created a new Java Web Application project (u...
hello i have set up a basic client and a basic server using java sockets. it can successfully send strings between them. now i want to design some basic messages. could you give me any recommendations on how to lay them out? should i use java's serialzation to send classes? or should i just encode the information i need in a custom st...
I am working on integrating a .NET application with a Servlet based Java application called Hermes2 (H2O). The Java application exposes several Web services, and I am trying to create Web References to these in Visual Studio 2008. However this only results in an empty proxy, commented with the error message: "CODEGEN: The operation bindi...
Hi, I am beginning in Blackberry development. I want to add two fields in a vertical field manager. I want the first one to be align on the left and the second one (on the second line) on the right. I don't find a simple answer to this question. Thanks a lot. ...
Hi, I would like to determine the exit status of the process during the shutdown hook runtime. I want to have a logic which is based on the status code (0 or nonzero) (ex: if zero do nothing else nonzero send an alert email) Do you know how I can get this information? ...
I need to export information and exported text must be translated. In database data is in non-translated form. My application requirements say that user must be also be able to import exported CSV file to database, so I need to reverse translated text to I18N format which is data format in database. How can I do that or is there any sane...
Hi everyone, A pretty basic JSP question, since I'm still trying to understand the right way to do things. I'm working on a web app which requires users to log in before working. What I'd like to happen is, anytime a user that isn't logged in tries to access any page (other than the login page), the user will be redirected to my login ...
I have two xml files defining beans for the springframework (version 2.5.x): containerBase.xml: <beans> <bean id="codebase" class="com.example.CodeBase"> <property name="sourceCodeLocations"> <list> <value>src/handmade/productive</value> </list> </property> </bean> </beans...
I am looking for a java distributed caching solution. We would like features likes: Distributed Auto-Discovery Redundancy Non-Centralized We've analyzed a framework like TerraCotta which seems to be everything we would ever want from a caching framework... However, there seems to be a central caching node(s) that is required which b...
A friend and I are building a fairly complex website based on java. (PHP would have been more obvious but we chose for java because the educational aspect of this project is important to us) We have already decided to use JSF (with richfaces) for the front end and JPA for the backend and so far we have decided not to use EJB3 for the bu...
I know there are many posts concerning NoClassDefFoundError, they all seem to be talking about jar files. While I'm comfortable with java in eclipse, I'm pretty lost as to why the simplest thing I can come up with is not functioning, unless they broke something on the university side of this. public class hello { public static void ...
I am reading a char array from a file in and then converting it too a string using the String constructor. read = fromSystem.read(b); String s = new String(b); This code has been in the program for ages and works fine, although until now it has been reading the full size of the array, 255 chars, each time. Now I am reusing the class ...
hi ive been doing a project in which metadata for various filetypes(html, xml etc.,) are needed. are there any existing api's to do the above. ideas and suggestions regardin the above are welcome. thanks in advance. ...
I need recommendations for a "light weight web server" to be ran on a Windows XP Home edition system to host a small web service (not web pages - but web service). The web service can be written in either .NET or Java. The Windows XP Home system will serve up the web service to clients consuming the service. Any suggestions? (before i...
Hi, I've got a JSP page, which calls a function and checks its return value. If the return value is not null, the JSP page goes on to use it. If the return value IS null, I want the processing of the JSP page to stop (this is because the function will perform a redirect before returning the null object. Also, the rest of the JSP code ob...