java-programmer >>[NEWBIE] Using a Java Class from a JSP Page

[NEWBIE] Using a Java Class from a JSP Page

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- 1
  - CORBA simulatorI'm looking for a CORBA simulator to help develop an application.
    Does any of you have any experience to share or advice?
    
    Bill
- 2
  - Good web host for JSPs?Hi;
    
    I've been thinking of buying my own domain and setting up my own site.
    
    My dream host would be
    
    - nix based
    
    - Java and JSP friendly.......for me making my own stuff
    
    - PHP, python, perl, C++ - whatever technology friendly so I will be
    free to learn
    
    - reasonably price
    
    I am also in registering my domain anonymously. Any good services?
    
    Any suggestions?
    
    Thanks
- 2
  - Sun Webcast Today & Tomorrow: Replacements for Windows Desktop w.3d Java Features
    Today & tomorrow Sun Webcasts announce new
    ---------------- projects that include
    Java and 3d Java apps in packages designed
    to replace Microsoft packages with packages
    based on Linux and Solaris bundleded with
    Java, Open Office or Star Office, and Mozilla.
    
    | Opening Address & Welcome
    | ------------------------
    | by Sun CEO Scott McNealy
    |
    | Sun's Software Strategy
    | -- Sun EVP Jonathan Schwartz
    |
    | September 16 9:00 a.m. - 11:30 a.m. (PDT)
    |
    | ------------------------------------------
    |
    | Slashing Cost & Complexity from the
    | Desktop to the Data Center
    |
    | -- Sun EVP Mark Tolliver
    |
    | 10:00 - 10:30 a.m. (PDT)
    | LIVE Chat with Sun CEO Scott McNealy
    |
    | September 17 9:00 - 9:45 a.m. (PDT)
    |
    http://www.sun.com/bignews/
    
    3D Desktop Demo ( java.net OpengGL bindings )
    ---------------
    
    SUN DECLARES LINUX DESKTOP READY FOR PRIMETIME
    |
    | Java Technology a Key Feature of Mad Hatter
    |-------------------------------------------
    | Sun's Java technology on the desktop is also
    | being enhanced for Project Mad Hatter providing
    | a native GNOME look and feel for all Java
    | applications.
    |
    | The innovative 3D desktop demo that wowed the crowd
    | during the keynote was built using Java technology
    | on Linux with Java for Open GL bindings which
    | Sun recently open sourced at java.net.
    |
    | Java technology is pervasive on the desktop as it
    | now runs on 550 million personal computers via
    | distribution arrangements with leading PC
    | manufacturers.
    |
    http://www.sun.com/2003-0805/feature/index.html
    
    Java & Java3d is used for Games ...
    
    Java Games
    -------------------------------------------------
    http://javagaming.org/cgi-bin/JGNetForums/YaBB.cgi
    http://www.frontiernet.net/~imaging/games_with_java3d.html
    http://www.frontiernet.net/~imaging/java_games.html
    |
    | Yahoo! Pool is a set of fun and realistic
    | multiplayer online billiard games. The most popular
    | games, 8-ball and 9-ball, allow players to break,
    | choose shots, sink or scratch - just like
    | the real thing.
    |
    | Players of Java technology based Yahoo! Pool games
    | can enter game rooms based on skill level, and
    | join in official Yahoo! Pool league tournaments.
    |
    http://java.com/en/explore/desktop/yahoo_pool.jsp
    
    Human Animation with Java3d with VRML using Sun's Loader
    ---------------------------------------------------------
    http://www.JavaGaming.org/cgi-bin/JGNetForums/YaBB.cgi?board=3D
    http://www.JavaGaming.org/cgi-bin/JGNetForums/YaBB.cgi?board=3D;action=display;num=1060641747
    
    I've been using Linux Red Hat 7.2 and it is
    better and chearper than Windows though it does
    need extra features ... which Sun is now adding.
    
    -- Paul, Java Developer & Web Animator
    --------------------------------------
    Imaging the Imagined: Modeling with Math & a Keyboard
- 2
  - extends JFileChooser ?Hi
    In JFileChooser there are some JButton. I have a class called
    PButton that extends JButton. I want JFileChooser use my class
    "PButton" instead of JButton. HowTo?
    
    thanks
    from Peter (email***@***.com)
- 2
  - java numerical library recomendationHi,
    I'm a relative newcomer to Java and I was wondering if there any good
    numerical libraries (on the lines of GSL for C) available? Specifically
    I'm looking for linear algebra routines, least squares and minimization
    routines. I'm interested mainly in Opensource libraries but I am also
    open to commercial libraries.
    
    Thanks,
- 2
  - Is there any basic base for a community website? (J2ee)Hi
    
    I'm wondering if there is any basic "base" for a community website. With
    things like support for user registration, login, individual homepages,
    photo albums, sending messages, guestbooks, diaries and so on... And
    ofcourse with optimised code (especially the code for the communicating with
    the database).
    I mean, I know these things have been written before, so it feels a bit
    stupid to do it again, like reinventing the wheel.
    What I'm looking for is a basic foundation, written in J2ee (Java/jsp), that
    is easy to use as a base when making a community that should be able to
    handle a large "population" (at least a few thousand simultanous users, and
    holefully ten thousands or even houndred thousands at peak hours, in the
    future).
    
    Any suggestions?
    
    /Jimi
- 3
  - jpeg has poor quality when written back to diskHi,
    I have written an app using netbeans that loads a jpeg image to a panel.
    I can then do some processing on it. However if I do no
    processing other than loading the file and saving it as a jpeg,
    the file has very bad quality. (compressed further?)
    
    How can I save an image file (jpeg) without losing quality?
- 7
  - Looking for comments on Technology RiversDoes anyone have any good, bad, or neutral opinions on Technology
    Rivers in VA, USA as a company to work for or with? Has anyone
    here had any contact with them? I'm currently engaged in a job
    search and know little about them besides what's on their wbsite.
    Any input would be appreciated. Either posts or direct emails
    are welcome.
    
    Thanks.
    
    --Joe
- 8
  - Reading windows event file like event viewer from windows/system32/config/AppEvent.evthi ,any one can help ,me to solve my problem.
    i m talking about reading AppEvent.evt SecEvent.evt SysEvent.evt files
    which basically resides in C:\WINDOWS\system32\config folder of
    windows xp.if we want to open that files and our computer is on n/w
    than some services used all three files and i m not able to open that
    files manually.if i want to read that files than i have two options
    either read by event viewer or copy this file and to another place and
    open it in vc++.
    i have to read or parse that file by writing a pure java parser
    without using any dll bcz that files runs under linux there is another
    option to use so(shared object files working as a dll in linux) but i
    don't want to depend on dll and so files.
    one another way microsoft ;log parser but i m not sure that it
    will run on linux or not ,simply i want to write independent java
    program using only java based open source api
    so plz give me a best approach to read or parse this event files when
    they r locked by another applications or services.
    
    this is the link which help u to understand windows event log format
    and it has links of sample program written in vc++,c#,asp.net,c+
    +,php .
    
    http://www.whitehats.ca/main/members/Malik/malik_eventlogs/malik_eventlogs.html
    
    i follow the php program approach but i got only source name,computer
    name,description but not able to parse this things individually and i
    also need date,event id,event type.
    
    then i got another code from code project site,which has functionality
    to read event logs it is using log4j to read this event files.and
    display ti on swing interface but i want only a simple program which
    did only reading or parsing event log files.
    
    http://www.codeproject.com/csharp/tracetool.asp
- 8
  - Natural logarithm method not recognisedGood day dear members of the comp.lang.java.programmer newsgroup.
    I've got the following error message while trying to use the "logl()"
    method (natural logarithm function) on my NetBeans IDE
    
    symbol : method logl(double)
    location: class org.me.mylib.fluidmechanics.DarcyLaw
    wfr = 7.08e-3 * ko_dl * depth_dl * (pr_dl - wbp_dl) / (mu_dl *
    bo_dl * ((logl(re_dl/rw_dl) - 0.75)));
    
    1 error
    
    Should I import any special mathematic library from NetBeans?
    
    Many thanks.
    
    Octavio
- 8
  - incomparable typesMany thanks,
    
    That did the trick.
    
    Donna
- 9
  - how to create jar fileHi,
    
    In help we can read:
    
    To create a JAR file from your help files, make the top level help folder
    the current folder. The jar command
    
    descends recursively through the different directories and copies all of the
    files to the JAR file.
    
    Use the following steps to create a JAR file named my_help.jar from the
    hierarchy example above:
    
    C:\> cd ...\help (where "..." is the path above the \help folder) 1.
    
    C:...\help> jar -cvf my_help.jar * 2.
    
    The jar -cvf command copies all the files in the \help folder and in all
    folders hierarchically beneath it into
    
    a JAR file named my_help.jar. As the command creates the JAR file, it
    reports its progress with output like
    
    My error message:
    
    "jar is not recoginized as an internal or external command, operable program
    or
    batch file"
    
    please help me
    
    Edd
- 9
  - surface plotAll
    
    I want to see if Java can do the surface plot (traditional gird plot, not
    contour or color)
    
    THanks
- 9
  - Requesting re-pack'ing of FrameHi all,
    
    I've implemented my own AWT component which determines a "preferred
    size" by itself. This component is added to a Frame, which is at the
    center of a BorderLayout in a Frame which gets pack()ed. The frame is
    also not resizable, because I must ensure this component always acutally
    has its preferred size. This works fine so far.
    
    However, during execution time this preferred size changes; is there a
    *generic* way to propagate this message up to the Frame so it re-pack()s?
    
    I do not want to use a succession of getParent() until I reach the Frame
    and call pack() on it, as this component might be used in a situation
    which does not allow this in the future (maybe an Applet or in an
    resizable/unpacked Frame as part of a more complex layout).
    
    Is there any way to achieve this? I.e., propagate to the Frame/layout
    that the preferred size has changed and this should be considered anew?
    
    Many thanks in advance,
    Daniel
    
    --
    Got two Dear-Daniel-Instant Messages
    by MSN, associate ICQ with stress --
    so please use good, old E-MAIL!
- 15
  - chaning label sizes during runtimehi all,
    I have a minor problem in my application (sorry I can't post any code,
    so I'vm only asking for guidance in the general case, not this
    specific one).
    In my application I have a number of JLabels that gets their texts
    changed during runtime. Unfortunatley it seems that they sometimes
    become too wide for the panel they are in. The panel has room to grow
    though (it is located in a jscrollpane).
    I use
    label.invalidate();
    after each change, and
    validateTree();
    on the top container after all changes.
    This gives me a somewhat strange behavour though.
    On first run nothing happens (i.e the label get's cut)
    on second run, the panel to the left shrinks a bit and the lables
    there get's cut. On the third run all looks nice.
    (run means updating of the labels, not a re-run of the application)
    
    So what is the best way to handle this?
    Should I invalidate, and revalidate myself? and if so when should that
    be done?
    All changes to components are executed in the EDT.
    
    regards
    Daniel

Author

Message

Federico

Posted: 2003-10-19 16:26:00

Top

java-programmer, [NEWBIE] Using a Java Class from a JSP Page Hi all and please forgive me for this newbie question.

I should create and utilize the funcionts of a Java Class from a JSP
page contained in Tomcat.

I Should:

a) define a package containing this class and put it in the CLASSPATH

b) put the Java class in TomCat (folder WEB-INF/lib or WEB-INF/class)

c) a mix of both methods!??! (Classpath AND Tomcat)?!?

Thanks

Federico

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    language is PHP, where I am applying all my oo theory but finding the
    language lacks some hard edges.
    
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    --
    To UNSUBSCRIBE, email to email***@***.com
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