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- 3
  - Problem with weblogic 8.1SP5Hi,
    
    I am deploying my application on bea weblogic 8.1SP5........and it
    showing errors below::::
    
    JVMDG217: Dump Handler is Processing OutOfMemory - Please Wait.
    JVMDG315: JVM Requesting Heap dump file
    .........JVMDG318: Heap dump file written to
    /soft_dump/BEA815/user_projects/dom
    ains/mydomain/heapdump274442.1150373114.phd
    JVMDG303: JVM Requesting Java core file
    JVMDG304: Java core file written to
    /soft_dump/BEA815/user_projects/domains/mydo
    main/javacore274442.1150373147.txt
    JVMDG274: Dump Handler has Processed OutOfMemory.
    
    Is dere any solution for it?
    
    Thanks
    
    Samit Katiyar
    email***@***.com
- 3
  - AppletsHi all,
    
    I'm sure this is old hat to all of you but could someone please tell
    me if you can use FileReader to input data into an applet?
    
    I developed this project as an application and am just trying to put
    it on my website as an applet but it keeps saying "applet notinited".
    I figure it might be because the program needs access to a file
- 4
  - Finding help on Events and a small asideHi Guys,
    
    I am writing a java application using lots of visual components. The Java
    API help is good in that it tells me about all the constructors, methods and
    fields associated with a given object but where can I find similar help on
    the events that can be implemented.
    
    I know I can probably just ask my question and get an answer on a group but
    I am kind of a self help junkie and I tend to dislike bothering people and
    sending excess emails.
    
    And now my small aside
    
    The question arises due to the fact that I want to utilize a JTextField but
    only allow integers to be entered and I am looking for the right events to
    use to do things like the following.
    
    Any hints or other options would be appreciated
    
    Stop people entering letters or invalid characters via key-presses (probably
    a key-press event where I can gobble up erroneous keys but I still need to
    allow field tabbing and backspace del etc)
    Stop people entering letters via pasting (so switch off CTRL+V etc may
    encounter cross platform issues on Mac and Unix)
    
    Thanks Guys,
    Eamon
- 4
  - BufferedReader.readline() behavior with Socketshi !
    
    Here the piece of code that creates my BufferedReader object
    
    --- code ---
    Socket socket = new Socket(....);
    BufferedReader inSocket =
    new BufferedReader(
    new InputStreamReader(
    m_socketService.getInputStream()));
    --- /code ---
    
    My request concerns the method readline() of this object. According to
    what I understood of my readings, I expect from this method it blocks
    itself until data comes to the socket.
    
    Is that correct? Because in my implementation, this method returns
    always null if there is no data to read. So I have to write this
    
    --- code ---
    String requete;
    if ((requete = inSocket.readLine()) != null)
    {
    // do something
    }
    --- /code ---
    
    And that sounds bad to me. It's like an infinite loop...
    
    Thanks a lot for your precious advices.
    
    -o--
- 5
  - LASER 2005 Summer School - Software engineering for concurrent and real-time systems-------------------------------------------------------------
    
    LASER Summer School on Software Engineering
    Software engineering for concurrent and real-time systems
    Elba, Italy
    September 11 - 17, 2005
    
    http://se.inf.ethz.ch/laser
    -------------------------------------------------------------
    
    Call for Participation
    
    SCOPE AND OBJECTIVES
    
    Research in software engineering of concurrent and real-time systems is
    currently making steady progress, too much of which remains unknown to
    practictioners. The aim of the LASER school is to distribute the results
    of that research to a wider audience and in turn to foster the
    appearance of new ideas. The school is intended for both PhD students
    and for professional software engineers and managers who want to benefit
    from recent advances in concurrent and real-time software technology.
    
    The LASER school is part of an effort to establish a Laboratory for
    Applied Software Engineering Research. As the name suggests, the focus
    is resolutely practical, although theory is welcome to establish solid
    foundations.
    
    The LASER school brings together six of the best experts in the field.
    Each of them will present a series of six lectures on his or her latest
    research efforts. The speakers for 2005 are: Jayadev Misra (University
    of Texas at Austin), Laura K. Dillon (Michigan State University), Amir
    Pnueli (New York University and Weizmann Institute of Science), Joseph
    Sifakis (VERIMAG and University of Grenoble), Bertrand Meyer (ETH
    Zurich) and Wolfgang Pree (University of Salzburg).
    
    The school takes place in the wonderful setting of the Island of Elba,
    off the coast of Tuscany, easily reachable through Pisa and Marina di
    Campo airports. Along with an intensive scientific program, participants
    will have time to enjoy the natural and cultural richness of this
    history-laden jewel of the Mediterranean.
    
    LECTURES
    
    "A process-algebra for web computing"
    by Jayadev Misra
    
    "Szumo: A Compositional Contract Model for Safe Multi-threaded Applications"
    by Laura K. Dillon
    
    "Temporal Verification of Reactive Programs"
    by Amir Pnueli
    
    "Component-based Modeling of Real-time Systems"
    by Joseph Sifakis
    
    "Object technology for concurrent and real-time programs"
    by Bertrand Meyer
    
    "Transparent distribution of real-time software components based on
    Logical Execution Time"
    by Wolgang Pree
    
    REGISTRATION
    
    Registration is open until May 30th. The number of participants is
    strictly limited to ensure quality interaction with the lecturers and
    the rest of the audience; all applications must be accompanied by a
    letter of recommendation from the applicant's supervisor or manager. A
    small number of scholarships are available for participants with
    insufficient institutional support.
    
    How to apply?
    
    Use the online registration form available on the LASER website
    (http://se.inf.ethz.ch/laser). Deadline for the application is May 30, 2005.
    
    Registration fee
    
    The basic registration fee is EUR 850. Full-time PhD students are
    entitled to a discounted price of EUR 500. The registration fee covers
    participation in all lectures and other activities of the summer school,
    course materials, and excursions.
    
    Accommodation
    
    The accommodation fee is EUR 680 (double occupancy) or EUR 840 (single
    room). It includes eight nights in the Hotel Hermitage with breakfasts
    and dinners (full board available for additional 160 EUR). Other
    expenses such as drinks, telephone etc. will be charged directly by the
    hotels. For extra night stays or accompanying persons (subject to
    availability of rooms), please contact the school organizers.
    
    Scholarships
    
    A small number of scholarships are available for participants with
    insufficient institutional support; they are primarily intended for
    students and researchers from developing countries. Participants
    applying for such scholarships will be requested to certify that their
    institution cannot bear the costs. Each scholarship is EUR 800, covering
    a waiver of the PhD student registration fee and EUR 300 towards the
    double-occupancy accommodation fee.
    
    WEBSITE AND CONTACT
    
    For all additional information, please visit the website:
    http://se.inf.ethz.ch/laser
    You can also contact the school organizers at email***@***.com.
    
    Best regards,
    Volkan Arslan
- 8
  - adding your own styles to Javadoc so that they work automatically?I've managed to get my own styles into the Javadoc
    "package.html" file; even though javadoc nukes the
    "<head>...</head>" part of the file; this works when
    inserted into the _body_ up toward the top, a bit of a
    happy surprise to me, I expected it _had_ to go into
    the <head>...</head> part:
    
    <style>
    span.tbd { font-weight: 700; color: red }
    body { background-color: #FFFFFF ; background:
    url("http://www.well.com/user/xanthian/images/webback.gif") }
    </style>
    
    Well, fine, that's because the original is a *.html
    file, making things work fairly naturally.
    
    Things aren't so nice for the *.java files, though.
    This definitely does _not_ work at the top of a
    *.java file to accomplish the same two style
    declarations:
    
    /**
    * <style>
    * span.tbd { font-weight: 700; color: red }
    * body { background-color: #FFFFFF ; background:
    url("http://www.well.com/user/xanthian/images/webback.gif") }
    * </style>
    */
    
    [Excuse if moronic Google Groups has probably
    wrapped the "body" line, that's supposed to be all
    one line in both cases.]
    
    Is there some easy way to make this work, so that I
    can have my Javadocs pages decorated with my
    favorite spiderweb background design, without having
    to edit by hand the stylesheet.css that javadoc() emits,
    after running javadoc(), _every single time_ I run
    javadoc() (which is many times an hour when I'm
    working on cleaning up the javadoc output, and so is
    an insufferable nuisance)?
    
    IMWTK
    
    xanthian.
- 8
  - Eclipse Plugin- UML Toolbar removalRecently I have uninstalled some Eclipse plug-ins from Eclipse 3.1. These
    are from Visual Paradigm and are related with UML Modeling. Though all the
    applications have been properly uninstalled from the computer, the toolbars
    associated with these plug-ins are still there in the IDE.
    How to remove it? How to remove a toolbar from Eclipse?
- 8
  - Puma MTV Suede Doug E Freshwww.NikeHome.netGlobal supply www.NikeHome.net
- 9
  - Simple Newbie Question? Is This kind of things possible with Java3DHi,
    
    Firts of all, I hope that my English can be understood, I hope so...
    
    I'm very new to Java3D and have been surfing a bit on the net after soms
    examples of thing that are possible with Java3D
    Now I would like to know if the following is possible.
    
    I would like to know if I can - and how it could be done - to add two simple
    beams (rectangles in 3D) to the screen. Can this be done with some simple
    xyz-coordainates that I have to give? Because in my final application I
    would have to build some model that exists out of multiple beams (not cubes
    only, different width, height en depth). I could easyli have the coordinates
    of those objects, but is this enough or do I have to knwo some about
    clipping (or does Java do that automatically?).
    Also, those independant objects could be next to each-other (in 3D). Give
    this problems? The only example I have seen so far (that sounds like my
    problem) is the colored cube. But my object would have only the frames, I
    should be able to look through the objects (damn, don't know the word at the
    time...)
    
    So can this be done. Maybe some more experienced people can give me a litlle
    bit of code where thera are 2 beams, so that I can see the result, and knwo
    if it is possible or not. Ohterwise, I should look for some other
    techniques... If the result is acceptable, then I would read a lot of books
    of course...
    
    thanks very much
    
    Goethals Frederik
- 11
  - Newbie question: handling arrays in separate classHey,
    
    I'm new to Java and looking for solution to the following question.
    In my code I want to keep all my data in the arrays of strings in a
    separate class.
    I can not find a way to construct such a class that would return on
    request a specific string from a specific array.
    
    I looked through the java groups any did not find anything that would
    help me.
    If it's a trivial question please give me at least some guideline
    where to look for answer.
    
    By the way, sorry for my language
    
    Tom
- 11
  - uri in taglib jsp while developing witheclipseHi,
    I build a new JAVA project using New->project->java project in
    eclipse.
    I added a new JSP file and would like to know how do i declare the uri
    of the taglib file and where i should locate it, since i don't have in
    that project the web.xml file.
    for example:
    <%@ taglib prefix="cs" uri="myDir/myFile" %>
    where should myFile be located? or what's the beginning point that it
    starts searching the file?
- 13
  - What is the JMF?I just downloaded the Java Media Framework, but it doesn't make much sense
    to me. Is it supposed to be an optional API?
    If so, I don't see any demos, javadoc, etc....
    
    The file I downloaded was called jmf-2_1_1e-windows-i586.exe.
    
    --
    Josef Garvi
    
    "Reversing desertification through drought tolerant trees"
    http://www.eden-foundation.org/
    
    new income - better environment - more food - less poverty
- 14
  - How do I figure out what JSR's are supported by a J2ME Micro Edition JVM?Hi,
    
    I want to write Java code for my T-Mobile Wing (HTC Atlas).
    
    I see there are lots of neat JSR's for interacting with a GPS and
    other such things. Is there a way from within a Java program, I can
    query to see what JSR's are supported by the JVM?
    
    Thanks,
    John
- 16
  - multiple fog nodesI have a scene graph that has a root "world" TreeObject and possibly several children TreeObjects. Each TreeObject includes a BranchGroup and
    TransformGroup. Each TreeObject can have a separate translation/rotation and scale applied to it. Note: a TreeObject is _my_ construct.
    
    I have to support transparent switching between parallel and perspecive views. So to get the effect of zooming, I scale instead of translating in z. This keeps the code simpler. (comments?)
    
    I need to add depth cueing and as far as I know, fog is a common way of doing it. Other suggestions are welcome. I have tried pointlight and it seems to have the same issues as fog. Spotlight also seems to have the same issues.
    
    I prefer LinearFog: Exponential fog is less desirable, but acceptable. The contrast for each TreeObject should be optimal: i.e. the front and
    back of each TreeObject must be as bright (least fogged) and as dark (most fogged) as possible. In my opinion, this forces us to have multiple fog nodes, one per each TreeObject. Different sizes and shaped for different TreeObjects force this restriction.
    
    The other requirement is that each point on each TreeObject should have the same visibility based on fog whether it is scaled or not.
    
    As far as I know, fog equations work in physical eye coordinates, not in the local coordinates of the TreeObject. If the fog equations work in local coorindates of the TreeObject, fog would be correctly applied in terms of what I want: -
    In my application, zooming is implemented by scaling. This has a side effect of making a point behind the center go even further away in terms of eye coordinates, thus causing fog to get thicker. The point in question seems to be getting closer visually because everything gets bigger when you scale; yet it gets murkier because of fog. This effect is visually weird.
    
    Because fog is calculated in physical eye coordinates, I now need compensating logic to undo the conversion to the physical coordinate world.
    The compensation would be such that the end effect would be as if the fog equations use TreeObject-local coordinates.
    
    Do you know how to go about doing the compensation? Specifically, what transform(s) should I use to convert: (scale and/or translate) from the virtual world coordinate system to the physical eye coordinate system? I know how to get from my local coordinate system to the virtual world system, but how do I crossover to the physical coordinates system?
    
    Do you know of any helper classes that returns these transformations? I have heard of a ViewInfo object, but I am not sure how to use it and where to get it from. Also, while we are at it, do you know what the co-existence coordinate system is? It seems to be an intermediary coordinate system between the physical world and the virtual world.
    
    Links to good sites/books that talk in detail about these things would also be useful. I suppose these things are similar/exactly the same in
    OpenGL (DirectX ???) and any book that describes those would also do?
    
    --
    Message posted via http://www.javakb.com
- 16
  - JPanel sizeI need to get the size of a JPanel so that I can dynamically set the
    size of the scrollpane that'll contain it. How do I get the dimensions
    of a JPanel before it is actually displayed ??
    
    -snr

Author

Message

david

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Index ‹ java-programmer

Next
- 1
  - tomcat error 500...Hello all, i am trying to load a class file into a JSP page and getting
    a few errors...what ive got is a simple form, that reads a username,
    password, and submits it to a login.jsp file. my login.jsp looks
    like:
    
    <%@ page import="IMASOS.UserInterface" %>
    <html><head> ... <body>
    
    <%
    String uname=request.getParameter("username");
    String passw=request.getParameter("password");
    UserInterface ui = new UserInterface();
    boolean success = ui.login(uname,passw);
    if (success) out.println("<h2>User logged in</h2>");
    else out.println("<h2>Login Failure</h2>");
    %>
    </body>
    
    and the error im getting is...
    
    exception
    
    org.apache.jasper.JasperException
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:370)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
    
    root cause
    
    java.lang.NullPointerException
    IMASOS.UserInterface.login(UserInterface.java:92)
    org.apache.jsp.login_jsp._jspService(org.apache.jsp.login_jsp:50)
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
- 2
  - java cannot call bat filehi all ,
    
    i have a problem . i am trying to call a bat file from java. When i
    test using a exe file. I can call the exe file, but when its a .bat. it
    just doesnt seem to work. here is the code:-
    
    File[] fdrives = File.listRoots();
    Runtime run = Runtime.getRuntime();
    try {
    frame.dispose();
    JOptionPane.showMessageDialog(null,"Start Installation");
    Process
    pp=run.exec("D:\\EAServer_v4_Developer\\SilentInstall_Win.bat");
    JOptionPane.showMessageDialog(null,"Installation Complete");
    }
    catch (Exception e) {
    JOptionPane.showMessageDialog(null,"Error occured");
    }
    
    the location of the bat file is correct. Its a silent installation for
    EAServer. Does anyone have any idea how come this happen ? Please help
    or advice.
    
    @ could mail me at email***@***.com also. :)
    
    Thanks.
    
    marvin.
- 3
  - " Does anybody know how I can Drag an icon/object from windows desktop to Java GUI applicationHi..
    
    " Does anybody know how I can Drag an icon/object (which is an exe.
    and has short cut, for example java web start icon) from windows
    desktop to Java GUI application ? If so, where can I Find More
    info/demo source code"
    
    Regards,
    Rakesh
- 4
  - how to get total number of rows contained in a resultsetHi friends
    
    how to get the number of rows contained in filteredrowset or a simple
    resultset.
    
    Thanx in advance
    
    praveen
    
    --
    praveen homkar
    
    Message posted via JavaKB.com
    http://www.javakb.com/Uwe/Forums.aspx/java-general/200508/1
- 5
  - need help with JTabbedPaneHello all
    I have a JTabbedPane with 6 Tabs (each Tab contains a JPanel). I want to
    separate them into two groups: put 3 Tabs at the top left and 3 Tabs at
    the top right of the JTablePane.
    If it is possible, please help
    Many thanks
    S.Hoa
- 6
  - finding total number of bytes an object takes upGiven an object of a Java class, is there some straightforward way to
    find out how many bytes of memory it takes up?
    
    In C there exists a <sizeof()> operator, but even if it had a counter-
    part in Java (which doesn't appear to be the case) that wouldn't be
    exactly what I want because the objects I want to know the sizes of
    contain references to objects of other classes, and I need to know the
    _total_ bytes taken up by that object, its components, its components'
    components, and so on. Can anybody point me to how I can find this
    out? Any information would be greatly appreciated.
    
    ---Kevin Simonson
    
    "You'll never get to heaven, or even to LA,
    if you don't believe there's a way."
    from _Why Not_
- 7
  - status bar ticking forwardHi,
    
    I am using a servlet application which when I call up a certain page,
    the status bar just keeps on ticking forward, you know the progress
    bar at the bottom of the screen.
    
    This is happening only on one page. I am doing nothing differnt to
    this page that I think would cause this. Any ideas?
    
    Thanks.
    
    TP
- 8
  - JDK 1.5 metadata feature docs?Hi all,
    
    Has anyone come across documentation that thoroughly describes metadata
    functionality that will be available in JDK 1.5? I only saw some brief
    examples of what it's supposed to do, and I downloaded JDK, but I can't find
    any docs. Any pointers?
- 9
  - Third tapestry tutorial availableHi all,
    
    Tapestry is a web app framework (Java) that allows
    your web designers to create and edit web pages using
    a WYSIWYG editor (DreamWeaver, FrontPage or etc),
    while your programmers can still add dynamic contents
    to the pages.
    
    I've created my third Tapestry tutorial. You're welcome
    to read it
    at http://www2.cpttm.org.mo/cyberlab/softdev/tapestry/
    
    Thanks!
- 10
  - OT- interesting article in the NY TimesNew York Times
    http://www.nytimes.com/2004/01/26/opinion/26HERB.html
    ----------------------------------------------------------------------
    ----------
    
    January 26, 2004
    OP-ED COLUMNIST
    Education Is No Protection
    By BOB HERBERT
    
    The conference was held discreetly in the Westin New York hotel in
    Times Square last week, and by most accounts it was a great success.
    
    The main objections came from a handful of protesters who stood
    outside in a brutally cold wind waving signs that said things
    like "Stop Sending Jobs Overseas" and "Put America Back to Work." No
    one paid them much attention.
    
    The conference was titled "Offshore Outsourcing: Making the Journey
    Work for Your Corporation." Its goal was to bring executives up to
    speed on the hot new thing in corporate America, the shipment of
    higher-paying white-collar jobs to countries with eager, well-
    educated and much lower-paid workers.
    
    "We basically help companies figure out how to offshore I.T.
    [information technology] and B.P. [business process functions]," said
    Atul Vashistha, the chief executive of NeoIT, a California consulting
    firm that co-hosted the conference.
    
    Several big-name corporations had representatives at the conference,
    including Procter & Gamble, Motorola, Cisco Systems and Gateway.
    
    Because the outsourcing of white-collar jobs is so controversial and
    politically charged (especially in a presidential election year),
    there was a marked reluctance among many of the participants to speak
    publicly about it. But Mr. Vashistha showed no reluctance. He was
    quick to proselytize.
    
    "These companies understand very clearly that this is a very painful
    process for their employees and for American jobs in the short term,"
    he said. "But they also recognize that if they don't do this, they
    will lose more jobs in the future and they won't have an ability to
    grow in the future."
    
    He said his firm had helped clients ship about a billion dollars'
    worth of projects offshore last year.
    
    Noting that he is an American citizen who was born in India, Mr.
    Vashistha said he is convinced that outsourcing will prove to be a
    long-term boon to the U.S. economy as well as the economies of the
    countries acquiring the exported jobs.
    
    Whether it becomes a boon to the U.S. economy or not, the trend
    toward upscale outsourcing is a fact, and it is accelerating. In an
    important interview with The San Jose Mercury News last month, the
    chief executive of Intel, Craig Barrett, talked about the integration
    of India, China and Russia ?with a combined population approaching
    three billion ?into the world's economic infrastructure.
    
    "I don't think this has been fully understood by the United States,"
    said Mr. Barrett. "If you look at India, China and Russia, they all
    have strong education heritages. Even if you discount 90 percent of
    the people there as uneducated farmers, you still end up with about
    300 million people who are educated. That's bigger than the U.S. work
    force."
    
    He said: "The big change today from what's happened over the last 30
    years is that it's no longer just low-cost labor that you are looking
    at. It's well-educated labor that can do effectively any job that can
    be done in the United States."
    
    In Mr. Barrett's view, "Unless you are a plumber, or perhaps a
    newspaper reporter, or one of these jobs which is geographically
    situated, you can be anywhere in the world and do just about any job."
    
    You want a national security issue? Trust me, this threat to the long-
    term U.S. economy is a big one. Why it's not a thunderous issue in
    the presidential campaign is beyond me.
    
    Intel has its headquarters in Silicon Valley. A Mercury News
    interviewer asked Mr. Barrett what the Valley will look like in three
    years. Mr. Barrett said the prospects for job growth were not
    good. "Companies can still form in Silicon Valley and be competitive
    around the world," he said. "It's just that they are not going to
    create jobs in Silicon Valley."
    
    He was then asked, "Aren't we talking about an entire generation of
    lowered expectations in the United States for what an individual
    entering the job market will be facing?"
    
    "It's tough to come to another conclusion than that," said Mr.
    Barrett. "If you see this increased competition for jobs, the
    immediate response to competition is lower prices and that's lower
    wage rates."
    
    We can grapple with this problem now, and try to develop workable
    solutions. Or we can ignore this fire in the basement of the national
    economy until it rages out of our control.
    
    E-mail: email***@***.com
- 11
  - What's the point?Here's some thoughts from a Java guy at JavaOne:
    
    http://beust.com/weblog/archives/000388.html
    
    As JavaOne 2006 opens its doors today, the age-old question is bound
    to be asked again and again: will Sun open source Java?
    
    I have a fairly straightforward answer: I don't care.
    
    And I suppose that most of the Java developers out there don't care
    either.
    
    What exactly is not open source in the Java we use today? I had to
    think hard to answer this question because, frankly, everything I need
    on a daily
    basis is already available in source form, with one exception: the
    Java Virtual Machine.
    
    Sun's JVM (and others) is admittedly very good and I'm sure a lot of
    developers would be interested in knowing how it works, but let's face
    it: the inner workings of a Java Virtual Machine are completely
    irrelevant to
    most Java developers and not having access to this resource will
    probably
    never get in the way of writing Java code.
    
    With that in mind, why is the question of open sourcing coming back so
    often?
    
    One word: zealotry.
    
    *Posted from the Opera Mini Java browser on my Nokia 9300.
- 12
  - problem with ListIteratorHello,
    
    I've read about the listiterator. It allows me to traverse the list in
    either direction and modify the list during iteration.
    
    But I've tried to add list elements during the iteration and got the
    error message.
    -- java.util.ConcurrentModificationException
    at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:444)
    at java.util.AbstractList$Itr.next(AbstractList.java:421)
    
    Is it possible to add the new elements at the end of the list??
    
    Thanks
    
    Lucia
- 13
  - jsp page giving error on tomcat 5Hi
    
    i have written a class for database connection. It has two public
    functions connect() which return an object of class Connection and
    function close which close the connection
    
    I am using that class in a jsp page to connect to database, but I am
    getting an error :
    
    Generated servlet error:
    [javac] Compiling 1 source file
    
    /usr/tomcat/work/Catalina/localhost/tpr/org/apache/jsp/web/jsp/index_jsp.java:7:
    package db does not exist
    import db.*;
    ^
    /usr/tomcat/work/Catalina/localhost/tpr/org/apache/jsp/web/jsp/index_jsp.java:51:
    cannot resolve symbol
    symbol : variable ibDriverTest
    location: class org.apache.jsp.web.jsp.index_jsp
    Connection con = ibDriverTest.connect();
    ......
    
    The class is in the package db. Can you please tell why is import db.*
    not working.
    
    Thanks is advance
    
    Lalit
- 14
  - why java is not pure object oriented?hi,
    
    I want to know why java is not a pure object oriented
    programming language.
    
    Thanks in advance.
- 15
  - Why no compiler-warning at invalid array-initializing ?I was wondering, why doesn't the java-compiler warn
    for incorrect initializing of arrays, for example :
    
    int[] myArray = new int[2];
    myArray[3] = 1; // Runtime-error : ArrayIndexOutOfBoundsException.
    
    Isn't it very easy for the compiler to detect this
    kind of invalid code ?