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  • How can I create a JTable where the first column is always in the JScrollPane viewport?

    - by voodoogiant
    What's the best way to set up a table in a JScrollPane such that the first column is always on the screen in the same position regardless of horizontal scrolling and overlaps columns that pass underneath? When the scrollbar is at the farthest left, the columns look normal, but as the user scrolls to the right, the secondary columns (2 and on) move underneath the first until the last column appears on the far right of the viewport? I found a sample taken from Eckstein's "Java Swing" book that sort of does this, but it doesn't allow resizing of the first column. I was thinking of some scheme where one JPanel held a horizontal struct and a table holding the secondary columns and another JPanel which floated over them (fixed regardless of scrolling). The struct would be to keep the viewport range constant as the first column floated around. Ideally I could do it with two tables using the same model, but I'm not sure if the whole idea is a naive solution.

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  • What is the point of JComboBox's getSelectedItem()?

    - by Chris Cooper
    I just read the JavaDoc for JComboBox (I promise I have a life... I wasn't reading through for fun. =P), and I think the problems I'm having with my program can be attributed to the getSelectedItem() method. The documentation says: Returns the current selected item. If the combo box is editable, then this value may not have been added to the combo box with addItem, insertItemAt or the data constructors. If you can't get values that were added with those methods or with the constructor, of what use is the method? And how can I get the value from an "editable" JComboBox? Link to JavaDoc: http://java.sun.com/j2se/1.4.2/docs/api/javax/swing/JComboBox.html#getSelectedItem()

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  • How can I put my own text hover into default Eclipse editor?

    - by vitivy
    I need to put some extra information into to the standard "javadoc" hover, that shows up when you go with mouse over some token. Or I need to create a new hover showing that information while pressing some key (like alt) and then hovering (I can see that this is done e.g. with the shift key, which enables us to see the hover with sourcecode, instead of javadoc). So far I found documentation on how to create hover in your own editors, but I need to extend the default java editor. Basically I am interested in showing some e-mail information related to the classname (token) over which user is hovering. Is there any extension point that could be used for this? Thanks for any help!

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  • Integrating Eclipse JDT Core into a new editor

    - by B_
    I'm building a Java IDE and am trying to implement autocompletion or intellisense. After looking around for something that will do most of the work for me (not reinventing the wheel etc) I've pulled the code for Eclipse JDT core and am trying to figure out how to implement it in my own IDE. I'm obviously working under the assumption that this is possible. If anyone knows a lot about Eclipse JDT Core, implementing intellisense, or other fun things that would help me accomplish my goal and would like to weigh in, I would appreciate it! Thanks!

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  • What does the status code of the Perl interpreter mean?

    - by futureelite7
    Hi, This might sound slightly confusing, but please bear with me. I'm trying to execute a copy of the Perl interpreter using Java's Runtime.exec(). However, it returned error code 9. After running the file a few times, the perl interpreter mysteriously started to return code 253 with no changes in my command at all. What does code 253 / code 9 mean? A google search for perl interpreter's exit codes turned up nothing. Where can I find a list of exit codes for the Perl interpreter? Thanks!

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  • Looking for an HQL builder (Hibernate Query Language)

    - by Sébastien RoccaSerra
    I'm looking for a builder for HQL in Java. I want to get rid of things like: StringBuilder builder = new StringBuilder() .append("select stock from ") .append( Stock.class.getName() ) .append( " as stock where stock.id = ") .append( id ); I'd rather have something like: HqlBuilder builder = new HqlBuilder() .select( "stock" ) .from( Stock.class.getName() ).as( "stock" ) .where( "stock.id" ).equals( id ); I googled a bit, and I couldn't find one. I wrote a quick & dumb HqlBuilder that suits my needs for now, but I'd love to find one that has more users and tests than me alone. Note: I'd like to be able to do things like this and more, which I failed to do with the Criteria API: select stock from com.something.Stock as stock, com.something.Bonus as bonus where stock.someValue = bonus.id ie. select all stocks whose property someValue points to any bonus from the Bonus table. Thanks!

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  • Strange HtmlUnit behavior (bug?)

    - by roddik
    Hello. Take a look at this: WebClient client = new WebClient(); WebRequestSettings wrs = new WebRequestSettings(new URL("http://stackoverflow.com/ping/?what-the-duck?"), HttpMethod.HEAD); client.getPage(wrs); Running this code results in throwing FileNotFoundException, because HTTP Status code on the page is 404 and getting the same page again with the GET method, with User-Agent set to Java-.... Why does it GET the page (it doesn't happen with "normal" status codes)? Is this a bug? Thanks Here is the entire server response: HTTP/1.1 404 Not Found Cache-Control: private Content-Length: 7502 Content-Type: text/html; charset=utf-8 Server: Microsoft-IIS/7.5 Date: Thu, 11 Feb 2010 14:12:11 GMT Where does it tell client to GET something? And how can I force WebClient to ignore it? Here's a screenshot of HTTPDebugger: The problem here is I don't understand why the second request is being sent and why is it sent with different useragent.

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  • Get Time in London

    - by fahdshariff
    How can I get the current local wall clock time (in number of millis since 1 Jan 1970) in London? Since my application can run on a server in any location, I think I need to use a TimeZone of "Europe/London". I also need to take Daylight Savings into account i.e. the application should add an hour during the "summer". I would prefer to use the standard java.util libraries. Is this correct? TimeZone tz = TimeZone.getTimeZone("Europe/London") ; Calendar cal = Calendar.getInstance(tz); return cal.getTime().getTime() + tz.getDSTSavings(); Thanks

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  • How to change line thickness in iText?

    - by drasto
    I'm drawing images to pdf using Java framework iText. I need to draw lines of specified width. There is a method setLineWidth(float width) in class PdfContentByte that should change it. However no matter what value I pass as its parameter the lines drawn are always extra thin. There is following line in javadoc of setLineWidth: The line width specifies the thickness of the line used to stroke a path and is measured in user space units. I don't know what is "space unit". Everything else in iText seems to be measured in point(around 1/72 inch). I cant find any reference to what are those "space units" and how to change them. code: to.setLineWidth(thickness); to.moveTo(x, y); to.lineTo(x + 100, y + 100); Variable to contains instance of PdfContentByte.

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  • Emacs key binding in Eclipse IDE

    - by Peter Delaney
    Hello; I am an Emacs lover probably because I love the key binding and I am able to do things very quickly. I also use Eclipse IDE for my Java/Android/Python/ development because it is free, most of my peers use it, and it works. I find myself switching between emacs and Eclipse and the workflow just isn't great. What I would like to do is setup the key bindings in Eclipse so that they are like Emacs. Can someone suggest the best Eclipse plugin I could use for this. Or can anyone talk about how they've used Eclipse to be more Emacs like. Thanks in advance

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  • xml intellisense with Eclipse Europa?

    - by Maddy.Shik
    Please suggest some free tools or some in build feature in Eclipse for intellisense of xml. I am using Eclipse Europa which is for EE java developers. <?xml version ="1.0" encoding = "UTF-8"?> <tests xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://jtestcase.sourceforge.net/dtd/jtestcase2.xsd"> </tests> Xml code above is part of xml file i am working upon. I am expecting eclipse to suggest me tags based upon xsd specified above. I am using ctrl+space for suggestion of new tag. Please suggest if i am using wrong key for intellisense or am i missing some tool or plugin. Thanks

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  • Optimizing if-else /switch-case with string options

    - by cc
    What modification would bring to this piece of code? In the last lines, should I use more if-else structures, instead of "if-if-if" if (action.equals("opt1")) { //something } else { if (action.equals("opt2")) { //something } else { if ((action.equals("opt3")) || (action.equals("opt4"))) { //something } if (action.equals("opt5")) { //something } if (action.equals("opt6")) { //something } } } Later Edit: This is Java. I don't think that switch-case structure will work with Strings. Later Edit 2: A switch works with the byte, short, char, and int primitive data types. It also works with enumerated types (discussed in Classes and Inheritance) and a few special classes that "wrap" certain primitive types: Character, Byte, Short, and Integer (discussed in Simple Data Objects ).

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  • how to programming SYSTEM for reading_comperhension question in English.

    - by michael123
    hi , i have to do some study for reading_comperhension in English. my work is ok but there is part from natural language - nlp area that i have to used . i want some help about QAsystem , how to answer the reading_comperhension automaticly .i have simple system about it that i get from this website http://www.cs.utah.edu/contest/2003/ , there is simple system in java but did not work to my i try to load the file from Remedia dataset that have the reading_comperhension story, but no result. after run this system , i have to develop by current technique such as rule based or pattern machine or combined with simple named entity.how to make that and which of them is petter to combined with the QAsys. thank you

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  • How to profile the execution of an OSGi deployment?

    - by Jaime Soriano
    I'm starting the development of an OSGi bundle for an application that will be deployed in a device with some hardware limitations. I'd like to know how could I profile the execution of that bundle to be always sure that it's going to fit with its dependencies in the final device. It would be nice to have a profiler to know how much memory is each bundle using, to localize bottle necks and to compare different implementations of the same service. Is there any profiler for OSGi deployments or should I use a general Java profiler? For developing I'm using Pax runner with Apache felix to run the bundle and maven to manage project dependencies and building.

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  • How do I fix this JBoss EJB client authentication issue?

    - by Rich
    I have an EJB deployed under JBoss (we're moving a project to it from Weblogic), I can get an EJBHome reference to the EJB via a JNDI lookup. The login-config.xml is set to use the module org.jboss.security.auth.spi.BaseCertLoginModule. When my client code tries to invoke the create method via reflection, calling invoke, I get an InvocationException which wraps an AccessException, which wraps a final exception of javax.security.auth.login.FailedLoginException: Password Incorrect/Password Required at org.jboss.security.auth.spi.UsernamePasswordLoginModule.login(UsernamePasswordLoginModule.java:213).... Am I missing some client code to use BaseCertLoginModule instead of UsernamePasswordLoginModule? Thanks in advance, any suggestions appreciated, apologies for not posting the entire stacktrace but it's on a secured network without internet access.

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  • Tomcat 5.5, Is there a max upload speed per request?

    - by maclema
    I am having an issue when uploading files to tomcat. It seems that tomcat (or something else?) will not handle the upload as fast as I can send it. When uploading multiple files concurrently I can max out my local connection upload speed (2.1MB/s). However, when uploading only one file at a time, no matter how small or large the file, the upload will max out around 400KB/s. I have tried setting the appReadBufSize higher but it makes no difference. Is there something else that would be limiting the upload speed per request? Proxy Server: CentOS 4 Apache 2 SSL Tomcat Server: CentOS 4 Tomcat 5.5.25 (Tomcat Native Library Is Installed) Java 6 Thanks! Matt

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  • Using Active Objects and BLOBs

    - by Andrew L.
    I am in a group of people who are creating a Defect Tracking program as a project. We have been using Active Objects and have run into some issues. Currently maximum file size for the blob is approx. 2Mb but we want to be able to increase it up to 2Gb. We currently have been looking at many sites and have not been able to find out how to increase the size. We are currently storing the blob as an array of bytes. Our current error says, Packet for Query is too large? We don't know how to set the variable, and we don't know how to set it using AO. We are programming this in Java, too. We are wondering if anyone has a solution to this problem. Thanks for the Help.

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  • fuzzy implementaion for capture specific strings

    - by kasun-456
    I am going to develop a web crawler using java to capture hotel room prices from hotel websites. In this case i want to capture room price with the room type and the meal type, so my algorithm should intelligent for that. as an example: Room type: Delux Meal type: HalfBoad price : $20.00 The main problem is room prices can be in different different ways in different different hotel sites. so my algorithm should independent from hotel sites. I am plan to use above room types and meal types as a fuzzy sets and compare the words in webpage with above fuzzy sets using a suitable membership function. any one experienced with this??? or have an Idea for my problem??

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  • Eclipse plugins for Spring / Hibernate development?

    - by es11
    I have a running dynamic web project in Eclipse (Java EE + Maven + Spring). I am at the point where I need to integrate a persistence layer and want to use Hibernate with a mySql database. I am wonder what plugins would be useful for me at this point? For Hibernate should I install hibernate tools or is it not necessary? Are then any plugins that are most widely use for connecting / exploring database connections that would be appropriate for the type of project I am working on? Thanks.

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  • How can I include platform-specific native libraries in the .JAR file using Eclipse?

    - by Martin Wiboe
    Hello all, I am just starting to learn JNI. I have been following a simple example, and I have created a Java app that calls a Hello World method in a native library. I'd like to target Win32 and Linux x86. My library resides in a DLL, and I can call it just fine using LoadLibrary when the DLL is added to the root of my Eclipse project. However, I can't figure out how to get Eclipse to export a runnable JAR that includes the DLL and the .SO file for Linux. So my question is basically; how would you go about creating a project in Eclipse and include several versions of the same native library? Thank you, Martin

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  • StringTokenizer problem of tokenizing

    - by Mr CooL
    String a ="the STRING TOKENIZER CLASS ALLOWS an APPLICATION to BREAK a STRING into TOKENS.  "; StringTokenizer st = new StringTokenizer(a); while (st.hasMoreTokens()){ System.out.println(st.nextToken()); Given above codes, the output is following, the STRING TOKENIZER CLASS ALLOWS an APPLICATION to BREAK a STRING into TOKENS.  My only question is why the "STRING TOKENIZER CLASS" has been combined into one token???????? When I try to run this code, System.out.println("STRING TOKENIZER CLASS".contains(" ")); It printed funny result, FALSE It sound not logical right? I've no idea what went wrong. I found out the reason, the space was not recognized as valid space by Java somehow. But, I don't know how it turned up to be like that from the front processing up to the code that I've posted.

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  • Code Formatter: cleaning up horribly formatted jsp code

    - by ahiru
    So I am working on a jsp/servlet that came to me and I'm looking at the jsp file and it is just a jungle of jstl tags, java code and html thrown together. At first it looked like someone ran the standard eclipse formatter on it and had the page width set to 40 so alot of stuff is broken up, I tried to format it with a larger page width but that seemed to make it worse to the point of not being able to tell what is going on without formatting parts of it first. Anyone have any luck with any jsp/code formatter?

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  • Eclipse -vm option trouble

    - by Taylor Leese
    I'm having trouble setting up a new eclipse installation with the -vm option. I'm using the eclipse.ini file below (which has worked in the past). I need this for the m2eclipse plugin. Currently, if I include the -vm option eclipse fails to start. Any idea what the problem is with this? -startup plugins/org.eclipse.equinox.launcher_1.0.201.R35x_v20090715.jar --launcher.library plugins/org.eclipse.equinox.launcher.win32.win32.x86_1.0.200.v20090519 -vm C:\Program Files\Java\jdk1.6.0_20\bin\javaw.exe -showsplash org.eclipse.platform --launcher.XXMaxPermSize 256m -vmargs -XX:PermSize=256m -XX:MaxPermSize=512m -Xms128m -Xmx1024m

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  • How to implement List, Set, and Map in null free design?

    - by Pyrolistical
    Its great when you can return a null/empty object in most cases to avoid nulls, but what about Collection like objects? In Java, Map returns null if key in get(key) is not found in the map. The best way I can think of to avoid nulls in this situation is to return an Entry<T> object, which is either the EmptyEntry<T>, or contains the value T. Sure we avoid the null, but now you can have a class cast exception if you don't check if its an EmptyEntry<T>. Is there a better way to avoid nulls in Map's get(K)? And for argument sake, let's say this language don't even have null, so don't say just use nulls.

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  • Explanation of JAXB error: Invalid byte 1 of 1-byte UTF-8 sequence

    - by Marcus
    We're parsing an XML document using JAXB and get this error: [org.xml.sax.SAXParseException: Invalid byte 1 of 1-byte UTF-8 sequence.] at javax.xml.bind.helpers.AbstractUnmarshallerImpl.createUnmarshalException(AbstractUnmarshallerImpl.java:315) What exactly does this mean and how can we resolve this?? We are executing the code as: jaxbContext = JAXBContext.newInstance(Results.class); Unmarshaller unmarshaller = jaxbContext.createUnmarshaller(); unmarshaller.setSchema(getSchema()); results = (Results) unmarshaller.unmarshal(new FileInputStream(inputFile)); Update Issue appears to be due to this "funny" character in the XML file: ¿ Why would this cause such a problem??

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