java-programmer >>Two Jframe`s - how to setenable(fasle) ?

Two Jframe`s - how to setenable(fasle) ?

Index ‹ java-programmer

Previous
- 3
  - Book question on threads"Chris Smith" <email***@***.com> wrote in message
    news:email***@***.com...
    > Obviously, it's possible to interpret the question in a way that makes
    > this answer wrong; it's probably easier, though, to interpret it to make
    > this answer right. What you've listed is invalid syntax, and I would
    > have a rather strong bias against an interpretation of this question
    > that requires you to assume (without seeing code) that the author has
    > written code that results in compile-time errors. If that were the
    > case, option B should read "the thread was never started because the
    > program didn't compile". :)
    >
    The example had no code. Only the question which I posted. The whole point
    of the question though, is to determine which possibilities are... um...
    possible.
    
    > To take a guess at a literal explanation, should we assume the author is
    > being as literal as you are, the word "access" is very closely related
    > to "accessor", the word for a short method that serves to allow someone
    > to access a field. More likely, though, the author wasn't excluding
    > non-direct access to the variable; the last phrase should instead be
    > interpreted as a statement of intent for what the thread wants to do.
    >
    As I said in my reply to Nigel, questions about programming (similar to
    programs about science and math) are very clear-cut. If every word of an
    answer isn't true, the answer is incorrect. At least that's how it is in my
    experience.
    
    > In the end, when people so frequently post bad questions from
    > certification prep books, and it's so widely known that a large majority
    > of certification prep books are full of stupid drivel from people who
    > confuse the Java language with their own pet mental gymnastics for
    > memorizing stuff and possibly also just feel more secure when they ask
    > ambiguous questions so that you'll miss some... given all this, why
    > would it be a surprise that someone found an ambiguous question in a
    > Java certification prep book?
    >
    No surprise. I just wanted to see if this was indeed one of those ambiguous
    questions. Apparently it is. If I saw this question on an actual test, I
    think I'd still answer it as I have here, because I haven't really heard a
    convincing explanation why not to. It seems that every response either
    explicitly or implicitly has something to do with "interpreting the answer"
    to mean something slightly different from what it says. I'm still going to
    have to stand by my original response to the question: you cannot
    synchronize access to a variable. Therefore a thread will never need an
    object's monitor in order to access a member variable of that object.
    Therefore, a thread will never be waiting on said monitor.
- 8
  - Webstart ignoring minor J2SE version numbersI'm trying to build my first WeStart aware application. I've JARed it
    and assembled my HTML and JNLP files, but am having a lot of trouble
    with the <j2se> tag.
    
    I would like my users to use Java 1.4.2 or later. (I have 1.4.2-b28
    myself). However, when I use the tag <j2se version="1.4.2+"/>, web
    start replys that a JVM of this version is not installed, and that it
    cannot find an appropriate JVM to download either. Changing that to
    "1.4.2" - the example given in the documentation - creates the same
    error. However, "1.4+" download and runs the application.
    
    My app relys on some bug fixes from versions post 1.4.0, and I'd like
    my users upgrade to the appropriate JVM. Is there a way to get this
    done?
    
    Mark McKay
    http://www.kitfox.com
- 8
  - jdk 1.5 on linuxHi.
    
    Anybody tried jdk 1.5 on linux ?
    
    I downloaded it, but I can't use any of new features.
    Example : Generics
    
    import java.util.*;
    class test {
    List<String> list = new ArrayList<String>();
    }
    
    this class compile fine on jdk 1.5 on Windows, but make on error on
    linux :
    
    > ./java -version
    java version "1.5.0-beta"
    Java(TM) 2 Runtime Environment, Standard Edition (build
    1.5.0-beta-b32c)
    Java HotSpot(TM) Client VM (build 1.5.0-beta-b32c, mixed mode)
    
    > ./javac test.java
    test.java:4: <identifier> expected
    List<String> list = new ArrayList<String>();
    ^
    1 error
    
    on windows, java -version returns
    C:\Documents and Settings\Mike>java -version
    java version "1.5.0-beta2"
    Java(TM) 2 Runtime Environment, Standard Edition (build
    1.5.0-beta2-b51)
    Java HotSpot(TM) Client VM (build 1.5.0-beta2-b51, mixed mode,
    sharing)
    
    I downloaded the 2 version (windows & linux) together.
    Sun says that linux version is also a beta2 version but that's not
    what "java -version" report.
    
    So, anybody having the same problem or an idea on what happened ?
    
    Thansk in advance.
    
    Mike
- 11
  - Aspect oriented Everything?Hello,
    
    Aspect oriented Software development seems to be expanding in the
    popular vision of developers, with more and more IDE 'add-ons' and
    even more specialized tools,Jboss etc.
    I've seen more and more languages integrate AOP,AspectJ (Java),
    AspectR(Ruby)etc.Aspect oriented does seem to be the place to go from
    a developer standpoint.What I want to know is,if anybody on a
    commercial scale is using AOSD to develop commercial products? Is an
    Open Source development ever going to gain the trust of industry? It
    may be ok for personal projects and other Open Source material but
    will your bank ever accept it? Is it the fact that AOP is new and, for
    most,confusing or is it the fact that AOP has developed in the
    environment it has.i.e Open Source,that may dissuade commercial
    development shops from accepting AOP.
    
    What are the main features that may lead to AOSD adoption? Is AOP the
    next step on from OOP? Is it another chance for some of the lesser
    utilised languages to step up to Java and C++? Your opinions on the
    subject would be appreciated? Design features are one thing but
    widespread adoption is another, or is it?
    
    Anything you care to add on the subject would be appreciated on this
    short questionnaire.
    http://www.geocities.com/aspect505
    
    Thank you for your participation.
    
    Shane Hassan.
    
    http://www.geocities.com/aspect505
- 11
  - Programming with JCo (SAP)Hi,
    
    I hope there is someone out there with programming experiences in SAP
    over Jco.
    
    Unfortunately I have no SAP System here to test my code with.
    In the documentation is written:
    
    ------
    JCO.Repository mRepository;
    
    mRepository = new JCO.Repository("ARAsoft", mConnection);
    
    We invoke the constructor for JCO.Repository with two parameters; the
    first one is an arbitrary name, the second one either a connection pool
    name or a JCO.Client object. In other words: Both connection pooling and
    direct connections are supported. In (web) server applications, we
    should always use a connection pool for the repository. The userid used
    for the repository has to have sufficient authorizations in SAP for the
    metadata access to be possible. Please read the Javadoc for class
    JCO.Repository to find out which specific authorizations are required.
    You can use one special userid for the repository access and one or more
    "normal" userids for the actual application.
    ------
    
    I have the following code I was able to test on a foreign system:
    
    public JCO.Function getFunction(String repositoryName, String
    functionName,
    JCO.Client connection) {
    
    IRepository repository =
    JCO.createRepository (repositoryName, connection);
    
    IFunctionTemplate ft = repository.getFunctionTemplate (functionName);
    
    return ft.getFunction ();
    }
    
    To create the Repository I pass an object of type JCO.Client. I have got
    this object from a pool before.
    
    When I understand the documentation corretly I can also pass the pool to
    create a Repository. Then there wouldn't be no need to handle with
    JCO.Client objects.
    But I can not test this and thus I want ask if someone can confirm that
    this works.
    
    And another question: Since I don't need any Client objects then, I can
    not release them to the pool. Is that ok and happens implicitely, or do
    I have to do something else?
    
    --
    bye Armin
- 14
  - >>>> Sr Java Dev position in MD -- $85/hr <<<<<Hello all!
    I'm Anna Rocheva, a recruiter with USTAS Technologies. I'm glad to
    present you a challenging opportunity.
    Our direct client is a large reputed financial organization based in
    Rockville MD, Washington DC Metro area. We are looking for Sr. Java
    Engineer who will develop and support a mission-critical J2EE
    applications.
    
    Required skills:
    
    ?5-7 years of experience of
    o OO design and development
    o Hard-core Java development
    
    ?5-7 years of experience with the following technologies:
    o Java (J2EE, Struts, tag library, Servlets, JSP)
    o XML
    o Web-based applications
    o Ant
    o SQL
    o Oracle
    o Unix/Linux
    
    ?2+ years of experience with the following technologies:
    o Spring framework
    o Hibernate
    o AJAX
    Agile software development practices
    
    ?Excellent communication and writing skills
    ?Product development methodologies
    ?Experience using software development best practices
    ?Experience using open source technologies
    Compensation:
    Up to $90/hr on c2c and $85/hr on w2..
    We have outstanding benefits, e.g. 100% family medical insurance, 401K
    plan, paid vacations etc.
    
    If you think that the position requirements match your technical
    background and expectations, don't hesitate to contact Anna at
    301-242-5033 or via email: email***@***.com
- 14
  - Manifest.mf Class-path troubleHi group!
    
    I'm deploying an application with this structure
    
    app
    app/app.bat
    app/lib/app.jar
    app/lib/another.jar
    app/plugins/other/
    
    where the (windows) batch file starts the application like so:
    java -jar lib\app.jar
    
    and the Manifest.mf with that jar puts another jar on the classpath
    like so:
    Class-Path: another.jar
    
    Now I also want to put any plugin classes that users put into
    app/plugins/other/ onto the classpath, roughly like so:
    Class-Path: another.jar "../plugins/other/*"
    
    So far I've tried a few variations, but the development cycle is quite
    tedious and it ain't workin yet.
    I'm wondering:
    
    * use quotes ?
    * forward slashes ok on windows or do I need separate versions for Win
    vs Unix ?
    * end the directory with / (or resp. \) or nothing (../plugins/other) ?
    * end the directory with "/*" or possibly "/*.class" ?
    
    Alternatively I could use the java -classpath arg in the batch file,
    but I've tried that and it's not working either, so I'm getting the
    impression that using the Class-path: line in the manifest somehow
    disables the -classpath arg of the java command. Is that so?
    
    YT
- 14
  - DropDown in cell of jTableHi all,
    
    I wish to put a drop down where to choose from when the user edit a certai
    cell of a jTable.
    The drop down should appear in the position of the cell thas is going to be
    edited....
    
    Is it possible? How?
    
    can someone point me in the right direction? (or send a snippet of code ;) )
    
    Thanks.
    
    Mario
- 15
  - Pipelining COM portsIs it possible to create a pipeline to virtual COM port (MS Windows)?
    
    I connect a mobile phone to PC over Bluetooth and
    [CommPortIdentifier.getPortIdentifiers();] does not enumerate any port,
    neither COM1 nor virtual port for mobile phone.
    
    If I use [new FileOutputStream("COM10");] then I can send data to
    mobile phone but I can't read the response.
    
    Basically, I need to open a pipeline to file. Where can I find more
    information on this topic?
- 15
  - MySQL / MS SQL - jsp developmentI am working on a jsp project that uses a MySQL database,
    i wonder if the backup (.sql) file of MySQL can be executed on a MS SQL
    server.
    
    sorry for sort of off-topic of the forum.
    
    Thanks so much
    ran
- 15
  - Fast image scalingHi all,
    I'm writing a program which involves drawing several copies of the same
    image inside of a JPanel. I have a listener on the mouse wheel to
    "zoom in/out", so that every image scales up or down in size at the
    same time. I'm having many problems getting this to run smoothly.
    
    I first tried to scale the image just once (since it is drawn many
    times) by calling getScaledInstance, saving the resulting image, and
    then drawing that lots of times. However, even though I am using
    Image.SCALE_FAST, it sometimes takes a while to update the image when
    scaling to larger sizes. (Note, the image is 440x250, and I'm never
    scaling it larger than double its size.)
    
    The second thing I tried was to use an AffineTransform to scale the
    graphics object just prior to drawing the image. This gave slightly
    better results during the actual scaling, but it caused random hitches
    (half-second pauses where all movement in the program completely
    stops), even when I wasn't actively changing the scale. I finally
    deduced that the scaling causes some garbage to be created, and the
    hitches happened when the garbage collector ran. (I also tried without
    the AffineTransform, and just using the width/height arguments in
    drawImage to scale on-the-fly, but the results were the same.) Please
    also note that when I don't scale the image at all, the drawing is
    perfectly smooth and fast.
    
    What I'm doing doesn't seem to be nearly as intensive as what most
    people are capable of doing, so clearly I'm doing something wrong. If
    anyone could point me in the right direction, I'd be most appreciative!
    Thanks!
- 15
  - Looking for a gui class to pop up to let user choose directory and filenameHi,
    
    When I output something to a file, I hope something pop up that let the
    user to select the directory and input the file name. I don't know how
    to do it. I can hard-code the file name in my program and use
    PrintWriter class to do it, like:
    
    PrintWriter outputStream = new PrintWriter(new FileOutputStream("out.txt"));
    
    outputStream.println("hello world");
    outputStream.println("how are you?);
    
    Thank you very much for your help.
- 16
  - finding java difficultI know Visual Basic and few other commands in Oracle but I am having
    trouble learning high level Java. Should I just read over and worry
    about it later? I understand Arrays and If statements but found for
    example, " overiding and hiding methods" difficult. It states a
    superclass overides a superclass. I am confused!
    
    here is "overiding and hiding methods" from the sun.com site;
    
    An instance method in a subclass with the same signature and return
    type as an instance method in the superclass overrides the superclass's
    method. (Remember that a method's signature is its name and the number
    and the type of its arguments.) You can also override a method with the
    same signature that returns a subclass of the object returned by the
    original method. This facility (introduced in 5.0) is called covariant
    return type and you can see an example in Annotations (in the Learning
    the Java Language trail).
- 16
  - Font Faces and Styles Not SetI'd like to see if anyone can offer an explanation for some font
    issues before I report the issues as bugs to Sun and Apple. Please let
    me know if you can explain the following as correct behavior.
    
    It appears to me that a lot of fonts simply don't work under Java 1.4.
    The simple application below should show fonts with a normal face,
    bold, italic and underline. Underline seems to work on all systems,
    but on both Windows and OS/X, bold and italic fail on many fonts. The
    same fonts seem to have bold and italic faces in non-Java
    applications, so it appears to be a problem with the JVM. For example,
    STENCIL on the Mac and Century on Windows both have distinct bold and
    italic faces in Word, but not in Java.
    
    On OS/X, many fonts do not display the proper face; they seem to
    default to serif or sans serif. Most of the Lucida fonts show this
    problem.
    
    Mike Westerfield
    
    --- main.java ---
    
    package fonttest;
    
    public class Main {
    
    public Main() {
    Window window = new Window();
    window.show();
    }
    public static void main(String[] args) {
    Main main1 = new Main();
    }
    }
    
    --- window.java ---
    
    package fonttest;
    
    import java.awt.*;
    import javax.swing.*;
    import javax.swing.text.*;
    
    public class Window extends JFrame {
    private JScrollPane jScrollPane1 = new JScrollPane();
    private JTextPane jTextPane = new JTextPane();
    
    public Window() {
    try {
    jbInit();
    pack();
    populate();
    } catch(Exception e) {
    e.printStackTrace();
    }
    }
    private void jbInit() throws Exception {
    jScrollPane1.setPreferredSize(new Dimension(640, 480));
    this.setDefaultCloseOperation(EXIT_ON_CLOSE);
    this.setTitle("Font Test");
    this.getContentPane().add(jScrollPane1, BorderLayout.CENTER);
    jScrollPane1.getViewport().add(jTextPane, null);
    }
    
    private void populate () {
    String defaultFont = "SanSerrif";
    String[] fontNames =
    GraphicsEnvironment.getLocalGraphicsEnvironment().getAvailableFontFamilyNames();
    for (int f = 0; f < fontNames.length; ++f) {
    jTextPane.getCaret().setDot(Integer.MAX_VALUE);
    setFont(defaultFont, false, false, false);
    jTextPane.replaceSelection(fontNames[f] + "\t");
    
    jTextPane.getCaret().setDot(Integer.MAX_VALUE);
    setFont(fontNames[f], false, false, false);
    jTextPane.replaceSelection("Abcdef" + "\t");
    
    jTextPane.getCaret().setDot(Integer.MAX_VALUE);
    setFont(fontNames[f], true, false, false);
    jTextPane.replaceSelection("Abcdef" + "\t");
    
    jTextPane.getCaret().setDot(Integer.MAX_VALUE);
    setFont(fontNames[f], false, true, false);
    jTextPane.replaceSelection("Abcdef" + "\t");
    
    jTextPane.getCaret().setDot(Integer.MAX_VALUE);
    setFont(fontNames[f], false, false, true);
    jTextPane.replaceSelection("Abcdef" + "\n");
    }
    }
    private void setFont(String name, boolean bold, boolean italic,
    boolean underline) {
    SimpleAttributeSet font = new SimpleAttributeSet();
    font.addAttribute(StyleConstants.FontFamily, name);
    font.addAttribute(StyleConstants.FontSize, new Integer(16));
    font.addAttribute(StyleConstants.Bold, new Boolean(bold));
    font.addAttribute(StyleConstants.Italic, new Boolean(italic));
    font.addAttribute(StyleConstants.Underline, new
    Boolean(underline));
    jTextPane.setCharacterAttributes(font, false);
    }
    }
- 16
  - NumberFormatException:please help me......!!!Hi,
    i have a question and i need your help.
    I'm developing a java application that have to import data from a txt
    file as
    
    3.2 2.1 4.5 6.7 2.3 4.5 3.4 5.5
    2.1 3.2 4.7 2.1 3.5 6.7 5.6 3.1
    
    The application counts rows number and columns number and import data
    into a bidimensional array of double type.
    I compile my code and i have this error
    
    Exception in thread "main" java.lang.NumberFormatException: For input
    string: "3
    ..2 2.1 4.5 6.7 2.3 4.5 3.4 5.5"
    at sun.misc.FloatingDecimal.readJavaFormatString(Unknown
    Source)
    at java.lang.Double.parseDouble(Unknown Source)
    at AddDb.ReadArray(AddDb.java:51)
    at AddDb.main(AddDb.java:97)
    
    How can i do?
    Please help me with code, i'm a new java user...
    Here is my code
    
    import java.util.*;
    import java.io.*;
    public class AddDb {
    private static String fileName="Dato.txt";
    private static int Ncolumns=0;
    private static int Nrows=0;
    
    public int ColumnsNumber(BufferedReader br)throws IOException {
    
    String line = br.readLine(); //legge una linea di testo terminata
    da /n o /r e la restituisce come stringa
    StringTokenizer st = new StringTokenizer(line);
    Ncolumns=st.countTokens();
    
    return Ncolumns;
    }
    
    public int RowsNumber(BufferedReader br)throws IOException {
    
    String line = br.readLine();
    while (line != null) {
    Nrows++;
    line = br.readLine();
    }
    return Nrows;
    }
    
    public double[][]ReadArray(int Nrows,int Ncolumns,BufferedReader
    br)throws IOException
    {
    double[][]x=new double[Nrows][Ncolumns];
    for(int i=0; i<Nrows; i++)
    {
    StringTokenizer tok=new StringTokenizer(br.readLine(),"");/
    for(int j=0; j<Ncolumns; j++)
    {
    
    x[i][j]=Double.parseDouble(tok.nextToken().trim()) }
    
    }
    
    for(int i=0; i<Nrows; i++)
    {
    for(int j=0; j<Ncolumns; j++)
    {
    System.out.println("L'array bidimensionale ?+x[i][j]);
    }
    }
    return x;
    }
    
    public static void main(String[] args)throws IOException {
    FileReader file = new FileReader(fileName); BufferedReader br =
    new BufferedReader(file);
    AddDb db=new AddDb();
    br.mark(99999);
    db.ColumnsNumber(br);
    System.out.println("Il numero di colonne e' :"+Ncolumns);
    br.reset();
    br.mark(99999);
    db.RowsNumber(br);
    System.out.println("Il numero di righe e' :"+Nrows);
    br.reset();
    System.out.println("Caricamento dell'array di double in
    corso.....");
    try
    {
    System.out.println(db.ReadArray(Nrows,Ncolumns,br));
    }
    catch(IOException e){
    System.out.println(e.getMessage());
    }
    br.close();
    
    }
    }

Author

Message

Posted: 2006-8-16 2:47:00

Top

java-programmer, Two Jframe`s - how to setenable(fasle) ? I have problem, in my application I have main jframe, now user click on
jbutton, now I create another Jframe with jprogressbar
i would like to block main Jframe. How to do is ?

Michael Rauscher

Posted: 2006-8-16 3:22:00

Top

java-programmer >> Two Jframe`s - how to setenable(fasle) ? tk schrieb:
> I have problem, in my application I have main jframe, now user click on
> jbutton, now I create another Jframe with jprogressbar
> i would like to block main Jframe. How to do is ?

E. g. you can use a modal JDialog for the second window.

Bye
Michael

Posted: 2006-8-16 3:32:00

Top

java-programmer >> Two Jframe`s - how to setenable(fasle) ?
U縴tkownik "Michael Rauscher" <email***@***.com> napisa?w wiadomo禼i
news:ebt6pe$2b7f$email***@***.com...
> tk schrieb:
>> I have problem, in my application I have main jframe, now user click on
>> jbutton, now I create another Jframe with jprogressbar
>> i would like to block main Jframe. How to do is ?
>
> E. g. you can use a modal JDialog for the second window.
>
> Bye
> Michael

if I create JDialog the main windows is also enable I want to be disable

Andrew Thompson

Posted: 2006-8-16 3:45:00

Top

java-programmer >> Two Jframe`s - how to setenable(fasle) ? tk wrote:
> U縴tkownik "Michael Rauscher" <email***@***.com> napisa?w wiadomo禼i
> news:ebt6pe$2b7f$email***@***.com...
> > tk schrieb:
> >> I have problem, in my application I have main jframe, now user click on
> >> jbutton, now I create another Jframe with jprogressbar
> >> i would like to block main Jframe. How to do is ?
> >
> > E. g. you can use a modal JDialog for the second window.
...
> if I create JDialog the main windows is also enable I want to be disable

Michael said a *modal* JDialog. (and that is 'modal=true')
If you do not understand what modal means, check the
constructors and try it. It should do exactly what you need.

(Or at least - the main window is 'disabled' in the sense
that the end user cannot click in it, but the controls are
not 'grayed out')

Andrew T.

Index ‹ java-programmer

Next
- 1
  - Java SDK on Linux (problem)I have a Java SDK (j2sdk1.4.1_02) installed on a Linux system (2.2.14).
    All seemed to be going well until I noticed something a bit strange.
    Running a java app appears to result in the launch of over a dozen
    consecutive processes. Suspecting the possibility of a weird, multi
    threaded app, I wrote a small test program, Hello.java (appended below).
    Same behaviour. Other than setting the CLASSPATH environment variable
    appropriately and unpacking the kit, the system appears to have no other
    java-specific configuration settings that I can find.
    
    Any ideas?
    
    // Hello.java
    package hovnanian.examples.gui;
    
    import javax.swing.*;
    import java.awt.*;
    
    public class Hello extends JFrame {
    public static void main(String[] args) {
    Hello h = new Hello();
    }
    public Hello() {
    super("Hello");
    
    String message = "Hello world!";
    Label lbl = new Label( message );
    this.getContentPane().add(lbl);
    this.pack();
    this.setVisible(true);
    }
    }
    
    --
    Paul Hovnanian mailto:email***@***.com
    note to spammers: a Washington State resident
    ------------------------------------------------------------------
    Applying information technology is simply finding the right wrench
    to pound in the correct screw.
- 2
  - ConcurrencyHi,
    
    I have a program with two classes. One class works out a value and
    returns it in the form of an array, the other class adds together all
    of the arrays returned by the first class.
    What I'm trying to do is get the processes running concurrently, so
    while the first process is working out all the values, the second is
    adding them all up.
    I currently have something like this which it working but I'm unsure
    whether it is actually concurrent:
    
    for(int x=1; x<=y; x++)
    {
    getValue P = new getValue();
    int[] temp = P.calculateValue(x);
    
    arrayAddition C = new arrayAddition() ;
    total = C.addArrays(total,temp);
    }
    
    I've also experimented with a buffer but with no luck.
    Any help would be appreciated,
    
    Thanks,
    
    Ed
- 3
  - Displaying multi-line textHi all,
    I want to display text on the screen, I would normally use a JLabel but I
    want this text to span over about 3 lines. I am trying to use a JTextArea
    but I want the background to be transparent, like the JLabels. I can not
    find anywhere in the API on how to do this. Any help or alternative ideas to
    using JTextArea would be greatly appreciated.
    
    Many thanks
    
    Ed Keen
- 4
  - instrument panelDoes anyone know of any shareware/freeware to help build an instrument
    panel with various gauge types to help build an instrument panel like
    in an airplane? It will be implemented in a Java 1.4 application.
    Thanks John.
- 5
  - Struts html:select question.I want to accomplish....
    
    I have to query a database whic return list of employee records.
    In the front end, i have to show, list of all firstName's in a list
    box style
    (<select multiple> <option>). If user decides to add more employees,
    then
    i have to validate the name(with no special characters) and proceed to
    the
    next screen. There i need to show the newly added name in that screen
    along
    with all other fields empty. So that user can add that fields.
    
    For this, i am doing like this.
    
    When i query database through my Action execute() method, database
    returns a set of employee records. I am capturing all those in my
    NameBean[] and passing it to JSP.Code looks like this..
    
    NameBean[] name = DatabaseReturnsListOfEmployees...
    request.setAttribute("MyNameBean", name);
    
    In my JSP
    <select name="allName" multiple>
    <logic:iterate id="MyNameBean" name="MyNameBean">
    <option> <bean:write name="MyNameBean" property="firstName"/>
    </logic:iterate>
    </select>
    
    This code populates <select> <option> with all the firstName in the
    list box.
    Now my JSP looks like a ListBox.
    
    The question is when i tried to add new firstName in the ListBox, how
    do i take it to the Action class? Since ListBox MyNameBean is
    NameBean[] and the Action's execute() method has ActionForm has form
    value. Not a ActionForm[] value. See below.
    
    public ActionForward execute(ActionMapping mapping,
    ActionForm form,
    HttpServletRequest request,
    HttpServletResponse response)
    
    Thanks in advance
- 6
  - SetProperty per oggetti Complessi Salve a tutti,
    
    sto sviluppando un'applicazione web piuttosto complessa in java che utilizza il framework Bluprint della Sun.
    
    In particolare, la mia problematica è legata alla gestione degli oggetti di business nell'interfaccia con l'utilizzo, nelle jsp, dei metodi setProperty e getProperty java.
    
    Gli oggetti che utilizzo sono i seguenti:
    
    ‘public class Anagrafica implements java.io.Serializable {
    
    ...
    
    private Vector indirizzi;
    
    }
    
    ...
    
    public class Indirizzo implements java.io.Serializable {
    
    protected String tipo;
    
    protected String particella;
    
    protected String address;
    
    protected String houseNumber;
    
    protected String zipCode;
    
    ...
    
    }
    
    Ciò che voglio realizzare è la visualizzazione nella jsp dell'interfaccia di tanti ‘frame' quanti sono gli oggetti Indirizzo contenuti nel Vector di Anagrafica. Scrivendo, però, ciò che segue:
    
    <jsp:useBean id="..." class="..." scope="session">
    
    <jsp:setProperty name="indirizzo" property="*"/>,
    
    il metodo setProperty non setta le proprietà complesse dell' oggetto vector indirizzo.
    
    Spero di esser stata chiara.
    
    Attendo un vostro suggerimento...
    
    -------------------------
    
    Annalisa Cosmai
- 7
  - Heap dump file size vs heap sizeHi,
    
    Do you know how heap dump file size is related to heap size itself?
    I've multiple heap dumps created using jmap on Solaris using Sun JVM
    1.5.0_09 and somehow filesize doesn't relate to heap size itself.
    
    Disproportions are quite big actually (even 500MB - 1GB)
    
    Michal
- 8
  - BigDecimal Builder and immutability...Our application uses BigDecimal, and BigDecimal is immutable. Immutability
    is certainly a good thing, but it also means that there are a lot more
    memory allocations (and collections). That's ok, we are all happy that
    Strings are immutable, but Java also gives us StringBuilder and
    StringBuffer. Is there anything similar for BigDecimal?
    
    BigDecimal operations are the hotspots in our application and the GC is also
    very busy collecting all the objects. Unfortunately double are not good
    enough for us. Ideally we would like something like C# Decimal: a 128bit
    decimal number (not floating point, but decimal), I have not actually used
    this, but from what I have heard it is what we would need..
    
    I googled the web for a fixed precision decimal class for Java, for an
    immutable version of BigDecimal, etc... I could not find anything. Do you
    know of anything that could help us?
    
    Thanks,
    
    Tommy
- 9
  - What Lies Beneath-Feature Article in Better Software MagazineWhat Lies Beneath
    by Ryan English
    
    According to a recent ABC News/Washington Post survey on identity
    theft, 84 percent of Americans polled believe that corporations are not
    doing enough to protect customers' personal data. The Privacy Rights
    Clearinghouse recently published the results of a survey that found 45
    percent of identity theft cases involve hacking. One-third of all
    identity theft cases are a result of Web application security
    vulnerabilities. These vulnerabilities can be costly and result in the
    exposure of large amounts of confidential information. Major public
    companies, including Google, T-Mobile, CVS, and MSN, were exploited in
    2005 through Web application security vulnerabilities. CardSystems lost
    its biggest partner, Visa, when it was announced that information from
    forty million credit cards might have been exposed to hackers.
    
    If many hacking attempts are for the purpose of identity theft, it is
    difficult to understand why so many organizations continue to install
    Web applications on the Internet without first checking for security
    defects and vulnerabilities. If you asked a group of developers and
    testers if they pride themselves on producing robust, defect-free
    applications, all of them would say yes. But if you asked the same
    question about secure code, few would have an answer. Yet security
    vulnerabilities are software defects. If a product has security
    vulnerabilities that will allow a hacker to steal confidential data or
    even shut down the application, then a solid, high-quality application
    has not been produced.
    
    Learn more:
    http://www.stickyminds.com/BetterSoftware/magazine.asp?fn=cifea
- 10
  - Beautify HTMLHi,
    
    I need to beautify HTML files from within my web application. These
    files come from an online editor that writes its output on a single line.
    
    JTidy might be a solution, but there is no documentation and so it's
    very hard to test it on the fly. After all, I don't need a complete
    parser: a simple formatter/beautifier would be great. Does anyone know
    of such a class? Arachnophilia does it, but it's not an API.
    
    Thanks
    Mario
- 11
  - Tele-conference demoI know Microsoft has teleconference software, can
    do tele-presentation, demo
    But I prefer do things simple
    
    I am thinking use java.awt.Robot class do
    the screen catch every second, then write
    to the image into a buffer file pipe
    in web server.
    
    Then in the web page create
    an applet read from that buffer file pipe.
    
    So when I doing demo, I start my program run
    in background, do screen catch, write to web
    server.
    
    User just http to my applet page watch my demo.
    This is similar to xwatchwin in X11 world.
    But X11 world only work in intranet with small
    group of people, require expensive X-terminal.
    Today every PC has a browser, access to internet.
    
    Do you think this is doable?
    Any better idea?
    Or such Java program already existed? (tell me the download link)
    Thanks!
- 12
  - How to get a static reference to a genericized class?I can explain much more concisely with an example...
    
    class Cow<C> {
    public Cow (Class<C> clazz) {}
    }
    
    class Milk<T> {}
    
    class Moo {}
    
    Now let's say I want to create a Cow< Milk<Moo> >. What do I pass to
    the Cow constructor?
    
    new Cow<Milk<Moo>>(Milk.class);
    
    This results in the error "The constructor Cow<Milk<Moo>>(Class<Milk>)
    is undefined". This is because the constructor is actually
    "Cow<Milk<Moo>>(Class<Milk<Moo>>)". How can I get a reference to
    Class<Milk<Moo>> without having an instance of a Milk<Moo>?
    
    new Cow<Milk<Moo>>((Class<Milk<Moo>>)Milk.class);
    
    This is better but results in the warning "Type safety: The cast from
    Class<Milk> to Class<Milk<Moo>> will not check conformance of type
    arguments at runtime". Damnit compiler, I know better than you! ;)
    Is there a better solution?
- 13
  - Choosing multicast addresshello everybody,
    how do I choose a multicast address?
    I know that in order to join a group, i just insert the address, but
    how will the server, or the other clients knows what is the IP address?
    
    thank you
- 14
  - Reading Values from a text file.Hi,
    
    I have a problem reading in values from a text file. Basically i have a
    webservice that gets queries from a database, and i wish to read the
    queries in from a text file. I know how to read a text file but what i
    really want to say is:
    
    open file;
    read first line of file;
    use this line as query;
    do query processing;
    then read next line of query;
    .....
    .....
    ....
    etc
    
    what i would like to know is there a way of looping through the lines?
    
    Many thanks
    
    Andrew
- 15
  - Problem with Java panelsI want to write application with few tabbed panels each with split
    panel inside. Some of those split panels should share the same panel
    as in code below.
    //----------------//
    JTabbedPane tabbed = new JTabbedPane();
    
    JSplitPane split1 = new JSplitPane();
    JSplitPane split2 = new JSplitPane();
    
    JPanel panel1 = new JPanel()
    JPanel panel2 = new JPanel();
    JPanel panel3 = new JPanel();
    
    split1.setLeftComponent(panel1);
    split1.setRightComponent(panel2);
    
    split2.setLeftComponent(panel2);
    split2.setRightComponent(panel3);
    
    tabbed.addTab("1",split1);
    tabbed.addTab("2",split2);
    //------------------------//
    
    Unfortunately in split1 panel I cannot see panel2 but only panel1. In
    split2 panel it all works fine. Why it doesn't work?
    
    --
    Lukasz Huculak
    email***@***.com