comp.lang.java.programmer http://groups-beta.google.com/group/comp.lang.java.programmer [EMAIL PROTECTED]
Today's topics: * Getting DCT Coefficients from JPEG File using Java ? - 1 messages, 1 author http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/bda8f17ff0550b71 * Beginning EJB - 7 messages, 4 authors http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/d49babfdb472b21c * Searching for (and remove) unreferenced methods - 1 messages, 1 author http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/6cf6cff59129ad70 * javax.comm - 1 messages, 1 author http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/4b1823ed49da2e4b * how to fix the JFrame size? - 1 messages, 1 author http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/ebe9bc0e6b94d453 * Tomcat 4.1.31 - huge count of webapps, Tomcat hangs up - 2 messages, 2 authors http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/51e7f717d6cd4b8a * request directory in server - 1 messages, 1 author http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/e5e516bd06745ac3 * Update your VM gentlemen, sun made a mistake. - 1 messages, 1 author http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/0d5689b8341eb5c3 * Finding Date Difference - 1 messages, 1 author http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/b9df8bc4e9c538dd * Laptop with Websphere - 1 messages, 1 author http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/6926ee85fd956588 * Struts: Proper way to escape "bean:write" - 2 messages, 2 authors http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/a3ca9dcfd0d6654d * JSP compilation time difference? - 1 messages, 1 author http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/71db042e9bc46415 * String.split() - 1 messages, 1 author http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/3362a3ab6d6ba8ba * What the different between form ".this" and ".class"? - 1 messages, 1 author http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/cc0d4d78310386ca * search(Object criteria) - to vague? - 1 messages, 1 author http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/8c9970db76f9ab70 * Sun's JMS API Tutorial: just hangs - 1 messages, 1 author http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/ffd2dbf4cfdc3ba9 * opinion on coding standard - 1 messages, 1 author http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/1f96751a1d317c1a ============================================================================== TOPIC: Getting DCT Coefficients from JPEG File using Java ? http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/bda8f17ff0550b71 ============================================================================== == 1 of 1 == Date: Thurs, Dec 2 2004 3:47 pm From: "Jackson" I'm currently doing some development in Java and I need to be able to extract the DCT Coefficients from a JPG file. I've done some research and found that Java does include a JPEG Decoder (com.sun.image.codec.jpeg.*), but I'm not sure how I could leverage this to grab the DCT Coefficients. It is my understanding that I would have to first, for each 8x8 block, decode the huffman values, decode the RLE values, decode the DPCM values, and undo zig-zag coding. I'm just not sure how I could get this concept into my Java program. Thanks! -Jackson ============================================================================== TOPIC: Beginning EJB http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/d49babfdb472b21c ============================================================================== == 1 of 7 == Date: Thurs, Dec 2 2004 7:01 pm From: Andrew Thompson On Thu, 02 Dec 2004 20:33:36 GMT, Collin VanDyck wrote: > Andrew Thompson wrote: >> As as aside, I have noticed a spate of postings from Google groups >> where the message is repeated. .. > Classic double clicky web browser problem? That might explain one 'every so often', but I have seen 3 in the last 24 hours. -- Andrew Thompson http://www.PhySci.org/codes/ Web & IT Help http://www.PhySci.org/ Open-source software suite http://www.1point1C.org/ Science & Technology http://www.LensEscapes.com/ Images that escape the mundane == 2 of 7 == Date: Thurs, Dec 2 2004 5:55 pm From: "Ann" "Nagu" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > Hello All, > > I have interests to pursue career in components development (EJB ). > Where do I start. I have good knowledge about JAVA language but not on > any other J2EE or J2Se technologies? What are the prerequisites to > learn EJB? > > Thanks Much > > Nagendra > I heard a rumor that EJB is now "old hat." Can anyone confirm? == 3 of 7 == Date: Fri, Dec 3 2004 4:10 am From: "Darryl L. Pierce" Nagu wrote: > I have interests to pursue career in components development (EJB ). > Where do I start. I have good knowledge about JAVA language but not on > any other J2EE or J2Se technologies? What are the prerequisites to > learn EJB? Start off by using a good text reference. I recommend _Enterprise Java Beans_ from O'Reilly, along with a copy of Eclipse, JBoss and JBoss-IDE. Those together make for an excellent learning environment. -- Darryl L. Pierce <[EMAIL PROTECTED]> Visit my webpage: <http://mcpierce.multiply.com> "By doubting we come to inquiry, through inquiry truth." - Peter Abelard == 4 of 7 == Date: Fri, Dec 3 2004 4:16 am From: "Darryl L. Pierce" Andrew Thompson wrote: > As as aside, I have noticed a spate of postings from Google groups > where the message is repeated. Is there some problem with the > Google interface? Are you using the beta-groups or the standard > groups interface? I noticed that as well. The first post is also posted as the first response to the post. Maybe they just had a new release and this was a bug that slipped through QA? -- Darryl L. Pierce <[EMAIL PROTECTED]> Visit my webpage: <http://mcpierce.multiply.com> "By doubting we come to inquiry, through inquiry truth." - Peter Abelard == 5 of 7 == Date: Thurs, Dec 2 2004 12:13 pm From: Andrew Thompson On 2 Dec 2004 11:52:50 -0800, Nagu wrote: > I have interests to pursue career in components development (EJB ). > Where do I start. I have good knowledge about JAVA language .. Apparently not good enough to realize that Java is not an acronym (JAVA -> Java). As as aside, I have noticed a spate of postings from Google groups where the message is repeated. Is there some problem with the Google interface? Are you using the beta-groups or the standard groups interface? -- Andrew Thompson http://www.PhySci.org/codes/ Web & IT Help http://www.PhySci.org/ Open-source software suite http://www.1point1C.org/ Science & Technology http://www.LensEscapes.com/ Images that escape the mundane == 6 of 7 == Date: Fri, Dec 3 2004 4:17 am From: "Darryl L. Pierce" Ann wrote: > I heard a rumor that EJB is now "old hat." Can anyone confirm? I heard that FUD in Java newsgroups is now "old hat". Can anyone confirm? -- Darryl L. Pierce <[EMAIL PROTECTED]> Visit my webpage: <http://mcpierce.multiply.com> "By doubting we come to inquiry, through inquiry truth." - Peter Abelard == 7 of 7 == Date: Thurs, Dec 2 2004 12:33 pm From: Collin VanDyck Andrew Thompson wrote: > As as aside, I have noticed a spate of postings from Google groups > where the message is repeated. Is there some problem with the > Google interface? Are you using the beta-groups or the standard > groups interface? > Classic double clicky web browser problem? ============================================================================== TOPIC: Searching for (and remove) unreferenced methods http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/6cf6cff59129ad70 ============================================================================== == 1 of 1 == Date: Thurs, Dec 2 2004 11:55 pm From: Martin Egholm Nielsen > Is there a simple (perhaps automated) way to find all methods in a > project that are not referenced by any other methods/classes? I'm sure > that there are some in our project, but short of checking each method > individually, I don't know how to get at them. You should look at ProGuard - it's an optimisation tool that does that - but to the compiled class-files, though. However, I reckon you can ask it to tell which methods are unused... // Martin Egholm ============================================================================== TOPIC: javax.comm http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/4b1823ed49da2e4b ============================================================================== == 1 of 1 == Date: Thurs, Dec 2 2004 6:28 pm From: "lin shen" Has anyone out there tried to use javax.comm to communicate with a rfid reader? lin ============================================================================== TOPIC: how to fix the JFrame size? http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/ebe9bc0e6b94d453 ============================================================================== == 1 of 1 == Date: Thurs, Dec 2 2004 8:51 pm From: "Woebegone" "nick" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] >i want to fix the JFrame size , make it can't resize > > thanks! > Dimension d = new dimension(x, y); JFrame f = new JFrame("Not resizable"); f.setSize(d); http://java.sun.com/j2se/1.5.0/docs/api/java/awt/Component.html#setSize(java.awt.Dimension) f.setResizable(false); http://java.sun.com/j2se/1.5.0/docs/api/java/awt/Frame.html#setResizable(boolean) hth, Sean. ============================================================================== TOPIC: Tomcat 4.1.31 - huge count of webapps, Tomcat hangs up http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/51e7f717d6cd4b8a ============================================================================== == 1 of 2 == Date: Fri, Dec 3 2004 1:25 am From: Andrea Desole 25 applications sounds a bit high, but what makes you think it's Tomcat? It's also possible that one of your 25 applications has a leak Martin Eberle wrote: > Hi everybody and java experts, > > i have a huge count of webapps (approximately 25) in my Tomcat here, > running on Suse Linux 9.1. After a few connection requests, Tomcat > just hangs up and doesn't accept anymore connection. I can't kill the > process anyway, only "killall -9 java" helps. Well, beneath the fact > that my server has 2 gigabytes of ram, only 40MB are available after > starting tomcat. So, tomcat allocates 1.96 gigabytes of ram. > > Question is: what is the maximum count of webapps, Tomcat is able to > handle? Or are there any other configuration hints? > > System is > - Suse Linux 9.1 > - 2GB of RAM > - 3.0 Ghz Machine > - JDK1.4.2_06 and JRE1.4.2_05 (same effect on every Java version) > - Tomcat 4.1.31 or Tomcat bundle with TDK-2.2 (TurbineDevelopmentKit) > .. > > This is an absolut urgent issue! Please reply asap .. > Thx a lot .... == 2 of 2 == Date: Fri, Dec 3 2004 12:32 am From: [EMAIL PROTECTED] (Martin Eberle) Hi everybody and java experts, i have a huge count of webapps (approximately 25) in my Tomcat here, running on Suse Linux 9.1. After a few connection requests, Tomcat just hangs up and doesn't accept anymore connection. I can't kill the process anyway, only "killall -9 java" helps. Well, beneath the fact that my server has 2 gigabytes of ram, only 40MB are available after starting tomcat. So, tomcat allocates 1.96 gigabytes of ram. Question is: what is the maximum count of webapps, Tomcat is able to handle? Or are there any other configuration hints? System is - Suse Linux 9.1 - 2GB of RAM - 3.0 Ghz Machine - JDK1.4.2_06 and JRE1.4.2_05 (same effect on every Java version) - Tomcat 4.1.31 or Tomcat bundle with TDK-2.2 (TurbineDevelopmentKit) .. This is an absolut urgent issue! Please reply asap .. Thx a lot .... ============================================================================== TOPIC: request directory in server http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/e5e516bd06745ac3 ============================================================================== == 1 of 1 == Date: Fri, Dec 3 2004 12:50 am From: Andrew Thompson On Fri, 03 Dec 2004 02:41:25 -0500, juicy wrote: > How to do if client specify a path of a directory and server will tell the > client that directory is exist or not As a servlet or JSP? // be careful how you use this.. File file = new File( getServletContext().getRealPath("/WEB-INF/passwords/") ); // then you can if ( file.exists() ) { ... -- Andrew Thompson http://www.PhySci.org/codes/ Web & IT Help http://www.PhySci.org/ Open-source software suite http://www.1point1C.org/ Science & Technology http://www.LensEscapes.com/ Images that escape the mundane ============================================================================== TOPIC: Update your VM gentlemen, sun made a mistake. http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/0d5689b8341eb5c3 ============================================================================== == 1 of 1 == Date: Fri, Dec 3 2004 3:20 am From: "MaSTeR" http://sunsolve.sun.com/search/document.do?assetkey=1-26-57591-1&searchclause= ============================================================================== TOPIC: Finding Date Difference http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/b9df8bc4e9c538dd ============================================================================== == 1 of 1 == Date: Fri, Dec 3 2004 4:25 am From: "Tim Ward" "Jacob" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > > No there isn't. You can find the difference between two > moments in time, but make sure the two are represented > by Calendars of the same reference (i.e. TimeZone). > The difference is measured in milliseconds so it still > takes some effort to convert it to something useful > depending on your context. Oh yes, this is a fun problem regardless of language. Compare a date in July with one in December - depending on where you live there's likely to be an odd hour in the difference, because of seasonal clock changes, which can really srew things up if you're not expecting it. -- Tim Ward Brett Ward Limited - www.brettward.co.uk ============================================================================== TOPIC: Laptop with Websphere http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/6926ee85fd956588 ============================================================================== == 1 of 1 == Date: Thurs, Dec 2 2004 12:54 pm From: Chris Smith Raymond Lee <[EMAIL PROTECTED]> wrote: > I am using IBM WSAD in work environment. It is a really good > IDE for Java web application development and I highly recommend it. > It has built-in refactoring features. Yes, it inherits those from Eclipse, which it's based on. The choice whether to use WSAD would depend on the use of additional tools provided beyond the base Eclipse platform, and a comparison to the available Eclipse plugins aside from WSAD. > You can debug and test your > applications locally by creating new server inside WSAD. If you use > Tomcat (web applications) and JBoss (EJB applications), you need a separate > IDE to do the coding. Nope, WSAD (and Eclipse) can be used to develop for Tomcat and JBoss. The integration with WSAD probably isn't as good as it would be with WebSphere. Using Tomcat or JBoss also saves you something like tens of thousands of dollars, at a minimum. -- www.designacourse.com The Easiest Way To Train Anyone... Anywhere. Chris Smith - Lead Software Developer/Technical Trainer MindIQ Corporation ============================================================================== TOPIC: Struts: Proper way to escape "bean:write" http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/a3ca9dcfd0d6654d ============================================================================== == 1 of 2 == Date: Thurs, Dec 2 2004 5:57 pm From: Sudsy Mike wrote: > I'm using "bean:write" inside a hidden field's value. > How can I escape strings so that I do not get errors? > > Thanks > > I have: > > <html:hidden property="division" value="<bean:write > name="scoreform_bean" property="division"/>"/> Why not just this? <html:hidden property="division" name="scoreform_bean"/> Refer to the javadocs for more, vis: <http://struts.apache.org/userGuide/struts-html.html#hidden> -- Java/J2EE/JSP/Struts/Tiles/C/UNIX consulting and remote development. == 2 of 2 == Date: Thurs, Dec 2 2004 2:36 pm From: [EMAIL PROTECTED] (Mike) I'm using "bean:write" inside a hidden field's value. How can I escape strings so that I do not get errors? Thanks I have: <html:hidden property="division" value="<bean:write name="scoreform_bean" property="division"/>"/> ============================================================================== TOPIC: JSP compilation time difference? http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/71db042e9bc46415 ============================================================================== == 1 of 1 == Date: Thurs, Dec 2 2004 3:58 pm From: [EMAIL PROTECTED] (jdhovland) I'm currently experiencing a problem while viewing a JSP page immediately after restarting. I log into the web front and view the pages, wherein I experience a problem of expected data/object not displaying. However, if I refresh the page the data is displayed. I'm trying to fathom if this is due to an interaction between the container and certain children compiling and displaying faster than the inline content (being generated by a server-side application method). Has anyone else experienced something similiar? ============================================================================== TOPIC: String.split() http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/3362a3ab6d6ba8ba ============================================================================== == 1 of 1 == Date: Fri, Dec 3 2004 12:46 am From: Starshine Moonbeam In article <[EMAIL PROTECTED]>, Ike ([EMAIL PROTECTED]) dropped a +5 bundle of words... > Can anyone please tell me why the following: > > > String rxsl="1}{2}{3}{4}{5}{6}{7}{9}{10}{12}{13}{14}{15}{17"; > String rsxla[] = rxsl.split("^.*\\}\\{.*$"); > > produces rxsla[0]="1}{2}{3}{4}{5}{6}{7}{9}{10}{12}{13}{14}{15}{17"; > > ??? > > and not > rxsla[0]="1"; > rxsla[1]="2"; > ... > rxsla[13]="17"; > > clearly I have something (simple and stupid) wrong -- but for the life of > me, cannot find it here. String[] something = new String[var] if var = 2 something[0] is set to "null" something[1] is set to "null" something[2] is set to "null" You could just assign them normally or you can declare the array values right off the bat String[] something = {"blue", "red", "orange"}; > Thanks, Ike > > > -- Starshine Moonbeam mhm31x9 Smeeter#29 WSD#30 sTaRShInE_mOOnBeAm aT HoTmAil dOt CoM ============================================================================== TOPIC: What the different between form ".this" and ".class"? http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/cc0d4d78310386ca ============================================================================== == 1 of 1 == Date: Thurs, Dec 2 2004 10:15 pm From: Starshine Moonbeam In article <[EMAIL PROTECTED]>, Bruce Sam ([EMAIL PROTECTED]) dropped a +5 bundle of words... > Here ".class" not means the class file.For example,in > "String.class.toString();".What does the ".class" and ".this" means? this. means this particular instance of a variable. int something = 0; int i = 3; public void setSomething(int i) { this.something = i; } Your something, that was initialized to zero, is now set to 3. something = 2; is the same as this.something = 2; return something; is the same as return this.something; -- Starshine Moonbeam mhm31x9 Smeeter#29 WSD#30 sTaRShInE_mOOnBeAm aT HoTmAil dOt CoM ============================================================================== TOPIC: search(Object criteria) - to vague? http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/8c9970db76f9ab70 ============================================================================== == 1 of 1 == Date: Fri, Dec 3 2004 3:56 am From: Michael Borgwardt VisionSet wrote: > I have a series of input components, text fields, check boxes etc in a > series of view subclasses. > When a user presses search, a method collects the inputs and forwards them > to a controllers search(Object criteria) method. > So it may get a String[] or perhaps a single String or maybe an Object[] > with Boolean and String etc. > Each view has its own controller so the search method is tailored to that > view, but it is being called via an interface method search(Object criteria) > Is there a better way to design this? Sounds to me like you might be able to apply generics and type-parametrize the search method. ============================================================================== TOPIC: Sun's JMS API Tutorial: just hangs http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/ffd2dbf4cfdc3ba9 ============================================================================== == 1 of 1 == Date: Thurs, Dec 2 2004 7:07 pm From: Andrew Thompson On Thu, 02 Dec 2004 21:15:05 GMT, TC wrote: > One other thing. The orb.properties file has: > > port=1050 > host=localhost > > Should these be the same on both machines? While you provided extra information that was useful, it was neither of the things I requested that you provide. Please return to the link I gave (or *go* to the link I gave) and read it carefully. -- Andrew Thompson http://www.PhySci.org/codes/ Web & IT Help http://www.PhySci.org/ Open-source software suite http://www.1point1C.org/ Science & Technology http://www.LensEscapes.com/ Images that escape the mundane ============================================================================== TOPIC: opinion on coding standard http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/thread/1f96751a1d317c1a ============================================================================== == 1 of 1 == Date: Fri, Dec 3 2004 2:08 am From: Michael Borgwardt Tim Jowers wrote: > Second, I've worked on lots of projects and the occassions for > multiple people to touch the same source are alot less than imagined. > Maybe two and possibly three people will ever change a block of code. My experiences are quite different. This depends very much on the size of the project, and the development process. For example, extreme programming strongly discourages "code ownership". > The two cases I've seen are persons leaves and newbie takes over. > Formatting can help because the task of reading and understanding the > code is daunting. Other case is fixing some bug. IME, stupid variable > names and plain poor coding are MUCH harder to fix than weird > formatting. Variable names are *part* of the coding standards, and a more important one than formatting. ============================================================================== You received this message because you are subscribed to the Google Groups "comp.lang.java.programmer" group. 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