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- 1
  - history.back problem with firefoxHi,
    
    I have 2 submit buttons in a jsp page. One of them takes me to
    page2.jsp and also passes the values enetered to page2.I have a link
    in the page2 that does a history.back to come to the previous page to
    make any chnages necessary. Now after making my changes, instead of
    going to page2.jsp if I want to submit the page, Instead of submitting
    the page it takes me to page2.jsp again.
    
    This problem is only with firefox. It works fine with IE. Can anyone
    help me on this?
- 4
  - JavaDoc Ignore TagsHi all,
    
    Is it possible to tel JavaDoc to ignore certain XDocLet tags, and/or not raise a warning that it is
    unknown?
    
    I am currently running JavaDoc through an Ant task, and wish to hide the warnings about my
    @hibernate tags.
    
    Regards,
    --
- 4
  - How do I open a device in non-blocking mode?I'm a little stuck. I have a Linux device (a character device, like a
    serial port) called /dev/cm15a0. I can't use RXTXcomm as it doesn't
    recognize the device (and I'm having trouble recompile RXTX). I need
    to open the device in non-blocking mode and read and write bytes
    to/from the device. Any pointers?
    
    --
    Linux Home Automation Neil Cherry email***@***.com
    http://www.linuxha.com/ Main site
    http://linuxha.blogspot.com/ My HA Blog
    Author of: Linux Smart Homes For Dummies
- 4
  - sample jsp servlet application requiredHi geeks,
    I'm a beginner in jsp and servlets, i want a sample JSP-SERVLET
    applicaton with source code. Can you please tell me where can i get the
    sample applications.
    Thanks in advance...
- 6
  - JTable row selection (left and right mouse)Is it possible to be able to allow users to use either the left or the right
    mouse button to select one or more
    rows in a JTable, and upon the selection, be able to tell which mouse button
    they used to select the row(s)?
    
    I have 15 tables on the screen. The user needs to select one or more rows
    from one table (the source)
    and then the same number of rows in another table (the destination) and then
    I need to swap the row
    data from both tables. So, I need a way to differentiate between the
    selections on the source and the
    destination tables.
    
    Thank you.
- 7
  - External process output missingHello,
    
    I'm using Runtime.getRuntime().exec(procedureFile) to run external
    system commands stored in procedure files, and I get their output from
    process.getInputStream().
    
    This works OK in Windows, but when I try it in a Unix system I get the
    direct output (i.e. procedure echos) but not the output from the
    programs run by the procedure. For example:
    
    #!/bin/sh
    PATH=/bin:/usr/bin:/usr/local/bin:/usr/local/sysadm/bin:
    export PATH
    echo "Starting remote copy for $1"
    scp -r $1 map@remotehost:/apps/myapp
    echo "End of remote copy for $1"
    
    would return the two echo messages, but not the output from scp.
    
    Is there something that must be done or declared to get all the output
    in Unix?
    
    Thanks for any hint,
    
    Guifre
- 7
  - XMLEncoder & DefaultPersistenceDelegateI am trying to encode EventObject's as XML using XMLEncoder. As
    subclasses of EventObject/AWTEvent are generally NOT java beans (they
    do not provide a nullary constructor), I have to provide an instance of
    DefaultPersistenceDelegate which specifies which properties are set by
    the constructor. I tried to this with ActionEvent as follows:
    
    encoder.setPersistenceDelegate( ActionEvent.class, new
    DefaultPersistenceDelegate(
    new String[] {"source", "ID", "actionCommand", "modifiers",
    "when"} )
    );
    
    Unfortunately, when I call encoder.writeObject with an argument of type
    ActionEvent, I get the following exception:
    
    java.lang.NoSuchMethodException: <unbound>=Class.new(null, Integer,
    "1", Integer, Long);
    Continuing ...
    java.lang.Exception: XMLEncoder: discarding statement
    XMLEncoder.writeObject(ActionEvent);
    Continuing ...
    
    It is apparently unable to find the constructor due to the first
    argument being null. However, "source" in my ActionEvent happens to not
    be null. "source" is a property from EventObject rather than
    ActionEvent, and I think this may be part of the problem. I have read
    another post that says XMLEncoder has problems with superclass
    properties.
    
    Anybody have any ideas?
- 7
  - Changing button colors in a loopHi all:
    I am working on a task that should imitate an elevator. I have two vertical
    rows of round buttons "Up" and "Down" When a circle is selected randomly by
    the program, the circle becomes yellow and the elevator moves to that
    button.
    Here is what I did:
    1. created a class Circle where I save buttons' parameters
    2. saved Circle objects in an array
    3. drew the buttons depending on their parameters
    4. generated a random number, matched it with an array index and assigned
    the object color to yellow.
    
    Everything is fine except that I can't figure out how to change colors of my
    buttons in a loop. Help would be greatly appreciated!
    
    import javax.swing.*;
    import java.awt.*;
    import java.util.*;
    
    public class Elevator3 extends JPanel
    {
    private int n = 40;
    private int width = 200;
    private int floors = 10;
    private int interval = 1000;
    private boolean selected = false;
    private Circle[] buttons = new Circle[2*(floors-1)];
    
    public Elevator3()
    {
    build();
    
    JFrame frame = new JFrame("Elevator3");
    
    setBackground(Color.WHITE);
    setFont(new Font("SansSerif", Font.PLAIN, Math.round(n/3)));
    frame.getContentPane().add(this);
    
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(width, n*(floors+2) );
    frame.setVisible(true);
    }
    
    public void build()
    {
    Random r = new Random();
    int buttonPick;
    
    int timeUntilNextButton = r.nextInt(interval);
    
    for (int k =0; ; k++)
    {
    if (timeUntilNextButton-- ==0)
    {
    buttonPick = r.nextInt(2*(floors-1));
    
    //populate my buttons array here - how??
    
    timeUntilNextButton = r.nextInt(interval);
    
    }
    
    }
    
    //adding "Down" buttons
    for (int i=1, count=0; i < floors; i++, count++)
    {
    if (count == buttonPick)
    selected = true;
    else
    selected = false;
    
    buttons[count]= new Circle(n*2, n*i, selected, Math.round(n/2));
    }
    
    //build an array of "Up" circles
    for (int i=2, count=floors-1; i < floors+1; i++, count++)
    {
    if (count == buttonPick)
    selected = true;
    else
    selected = false;
    
    buttons[count]= new Circle(n, n*i, selected, Math.round(n/2));
    }
    
    }
    
    public static void main(String[] args)
    
    {
    new Elevator3();
    
    }
    
    protected void paintComponent(Graphics g)
    
    {
    super.paintComponent(g);
    
    //draw buttons
    for (int i=0; i < buttons.length; i++)
    {
    g.setColor(buttons[i].getColor());
    g.fillOval(buttons[i].getX(), buttons[i].getY(),
    buttons[i].getWidth(), buttons[i].getWidth());
    }
    
    }
    
    }
    
    class Circle
    {
    private int x;
    private int y;
    private Color c;
    private boolean pressed;
    private int width;
    
    public Circle(int xCoordinate, int yCoordinate, boolean selected,
    int diameter)
    {
    x = xCoordinate;
    y = yCoordinate;
    pressed = selected;
    width = diameter;
    
    if (pressed)
    c = Color.YELLOW;
    
    else
    c = Color.LIGHT_GRAY;
    
    }
    
    public Color getColor()
    {
    return c;
    }
    
    public int getX()
    {
    return x;
    }
    
    public int getY()
    {
    return y;
    }
    
    public int getWidth()
    {
    return width;
    }
    
    }
- 7
  - Is it possible to write an applet that reads image and data files from web server that is easy for end users?My background:
    
    4th year computer science student.
    
    The school that I am studying at teaches a lot of java, but they haven't
    ever touched upon applets. I don't have much experiance with applets and
    I find that applets are excercising my patience. I thought I would
    attempt to write an involved applet and the program I was writing was
    working very well and I was pleased with the way it as coming out. I
    then put it on a web server and discovered all of the security problems
    with running applets off of the web. I am at a point now where I might
    want to totally abandon the project using java and move over to c++ and
    just write an app that uses an exe.
    
    I have done a lot of searching on the net for the info that seems to be
    eluding me. I am searching for and It is not clear to me if I can do
    what I wish to do without all of the damn security exceptions.
    
    My main question:
    
    I want to develop an application that runs from a browser window as an
    applet using Java. I want to be able to read files from the same server
    and directory structure which has the html files. The files that I would
    be reading would be jpg's and gif's and either text files or binary
    files for the data. It would also be nice to write to the directory, but
    at this point I would just be satisfied to be able to just read files.
    
    The users that I expect to use this applet are not expected to be very
    competant computer users. It is very important that the applet just run
    from a link or other simple method. Can I do this from a jar file
    without having to use certificates and/or java policy file
    modifications.
    
    I don't want to give up on java just yet, but this security thing is
    killing it for me.
    
    I have even thought about planting the data within the source code, but
    that to me seems too damn messy, and just plain wrong.
    
    I would just like if people could tell me one way or another if my
    program would be possible.
    
    Jean-Paul Lanaux
- 9
  - class not found within IEHi,
    
    I've written an applet. It properly works with Mozila. But with
    Internet Explorer it says "Class [the applet's name] not found" or
    something.
    What is the problem? How can I fix it?
    
    Thank you,
    Siamak
- 9
  - Configuring Tomcat to NOT use webapps directorycurrently my webapps directory is something like:
    
    C:\java\netbeans3.5.1\tomcat406\webapps
    
    This is where the Netbeans install put it. I want to move the
    directory to something a little more convenient to work with like:
    
    c:\webapps
    
    All I can find in the Tomcat configuration file is:
    
    <Host name="localhost" debug="0" appBase="webapps" unpackWARs="true">
    
    but if I change appBase to anything like "c:\webapps" or "c:/webapps"
    it doesn't work. Can anybody tell me how to move the appBase
    directory outside of the Tomcat or Netbean directory?
    
    Thanks in advance.
    Dean
- 10
  - PropertyChangeListener not recognizing changes to a putClientPropertyI must be missing out on something fundamental . . . why doesn't the
    following code ever register a PropertyChangeEvent?
    
    import java.beans.*;
    import javax.swing.*;
    import java.awt.*;
    import java.awt.event.*;
    import javax.swing.text.*;
    
    public class PropTest extends JFrame {
    private Boolean myBoolean = Boolean.FALSE;
    
    public PropTest() {
    super("PropertyChangeListener Test");
    JPanel panel = new JPanel();
    JButton button = new JButton(new BooleanAction("Button pushed"));
    button.setText("Push me!");
    panel.putClientProperty("myBoolean", myBoolean);
    panel.addPropertyChangeListener("myBoolean", new BooleanListener());
    panel.add(button);
    panel.getInputMap().put(KeyStroke.getKeyStroke(KeyEvent.VK_SPACE, 0),
    "space");
    panel.getActionMap().put("space", new BooleanAction("Space
    pressed"));
    this.getContentPane().add(panel);
    }
    
    private class BooleanAction extends AbstractAction {
    String title;
    public BooleanAction(String title) {
    super();
    this.title = title;
    }
    
    public void actionPerformed(ActionEvent e) {
    System.out.println(title);
    System.out.println("Old value: " + myBoolean.toString());
    myBoolean = new Boolean(!myBoolean.booleanValue());
    System.out.println("New value: " + myBoolean.toString());
    }
    }
    
    private class BooleanListener implements PropertyChangeListener {
    public void propertyChange(PropertyChangeEvent e) {
    System.out.println("Hey, you changed my value!");
    }
    }
    
    public static void main(String[] args) {
    PropTest propTest = new PropTest();
    propTest.setResizable(false);
    propTest.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    propTest.pack();
    propTest.setVisible(true);
    }
    }
- 14
  - Static fields accessed by getter/setter...what happens?(apology for duplicate post, I felt I posted in the wrong forum earlier.)
    Could someone please enlighten me as to what will happen if I have:
    
    public class MyClass
    {
    public static String someName = null;
    
    public void setSomeName(String s)
    {
    someName = s;
    }
    
    public void getSomeString()
    {
    return someString;
    }
    }
    
    I'm not sure how the static field is being handle using non-static getters/setters.
    Thanks
    Stacey
- 16
  - Bug#285014: java-common; correction for README.Debian-----BEGIN PGP SIGNED MESSAGE-----
    Hash: SHA1
    
    Package: java-common
    Version: 0.222
    Severity: minor
    
    In the file /usr/share/doc/common-java/README.Debian, the following lines:
    
    They can be found at
    /usr/share/doc/java-common/debian-java-faq.html
    and
    /usr/share/doc/java-common/debian-java-policy.html
    
    should probably read:
    
    They can be found at
    /usr/share/doc/java-common/debian-java-faq/index.html
    and
    /usr/share/doc/java-common/debian-java-policy/index.html
    
    Thanks,
    - --
    Barry Hawkins
    All Things Computed
    site: www.alltc.com
    weblog: www.yepthatsme.com
    
    Registered Linux User #368650
    -----BEGIN PGP SIGNATURE-----
    Version: GnuPG v1.2.5 (GNU/Linux)
    
    iD8DBQFBuRhC7bZ6kUftWZwRAtOTAKDMHWW9jUWEaqVC/qZHq+Cq/T+ohwCfeqHZ
    nSqMQ2c9L16CzGJOOw+FoMo=
    =0S/K
    -----END PGP SIGNATURE-----
    
    --
    To UNSUBSCRIBE, email to email***@***.com
    with a subject of "unsubscribe". Trouble? Contact email***@***.com
- 16
  - HalfTruth=Lie (was: I'm still waiting for somebody to offer co...)> From: "Phlip" <email***@***.com>
    > The good is the enemy of the best.
    
    A half-truth is a lie.
    A bicycle with only one wheel isn't useful.
    Yin without yang isn't useful.
    A glass half full but not half empty, or vice versa, is not the whole
    picture.
    For nearly every cliche there's an opposite which is equally valid in
    different circumances.
    
    Please choose which of the following activities you would most and
    least like to participate in:
    (1) Have bamboo shoots driven up under your fingernails.
    (2) Undergo Chinese water torture.
    (3) Be trapped in a large tank with one (1) pihrana.

Author

Message

Derek

Posted: 2004-8-11 4:47:00

Top

java-programmer, JAVA ?Oracle Programmers wanted Highly experienced JAVA / Oracle programmers wanted for a three month
contract in South Africa (JHB). Must have had ERP experience with some
integration skills.Open source experience an added advantage. Must be able
to work in a team.

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Index ‹ java-programmer

Next
- 1
  - newbie: Global EJB and more ...
    Hi group,
    
    While thinking of how to transfer a tranditional client-server app
    into J2EE, I got following two questions:
    
    1, In a typical application, there should be some global (even
    singleton) objects which are created on application startup code and
    stay there until the program exiting. In the idiom of J2EE, what kind
    of Beans act like this kind of global object? And, when and how these
    global beans should be created?
    
    2, I knew Beans have to be deployed onto the server before they come
    to be available, but those Beans quit often need some objects to
    complete its job, these objects may encapsulate a algorithem, may do
    some management task, but they typically dont have to exposed to
    client tire or web tire. I call these objects are intermediate
    objects. My question is, should this kind of objects need to be a EJB?
    My J2EE books seems only to mention three kinds of Beans,
    SessionBeans, EntityBeans and MessageBeans. But what do I do for those
    intermediate objects?
    
    Thanks in advance.
    
    --
    email***@***.com
    
    %% (fortunes)
    Q: How did you get into artificial intelligence?
    A: Seemed logical -- I didn't have any real intelligence.
- 2
  - Java client-server: what options are there?This is an issue that I have been pondering and investigating
    for years, and I wish there was a book, chapter or URL that
    covered it.
    
    I have to develop client-server systems in which the following
    is pretty much decided:
    
    - The database is Oracle 9iR2
    - The server OSs are Solaris and Linux
    - The clients (a few dozen) are Windows (XP?)
    - The client side runs on Java
    
    Those are the givens, the rest is up for grabs...
    
    The main undecided part is: exactly how to realize the client-server
    connection? That's what I would like to hear and read about.
    What options do I have?
    
    To get the ball rolling, I will share my experiences so far.
    
    First, I tried the JDBC approach, with a standalone application.
    There was a stored procedure in the server, and it was called
    from the client. The cons were: the size of the JDBC being much
    larger than my app, and there was also the issue of performance.
    I feel that I should move more of the functionality and heavy duty
    processing to the server side, where I can have plenty of horsepower.
    
    My second attempt was a Java applet which got its data
    through CGI-BIN from an OCI C program running on the server.
    The performance was pretty good and I'd like to stick with
    the OCI part but not with CGI-BIN.
    
    I just began the third approach: using SSH. The server part
    is a given since it comes ready in Linux, and I got the Java
    client part from sshtools.com.
    
    I have read about servlets, Tomcat, etc. but it looks like once
    I get into that stuff (the area seems to be called "Enterprise"),
    the tools become extremely expensive (for instance I will have
    to upgrade my $700 Developer JBuilder to a $3500 Enterprise JBuilder).
    
    The issue of performance still worries me (I am a speed freak):
    I wish I could just use the Unix R-commands (rsh, etc.) so all
    the encrypting-decrypting doesn't get in the way of client
    performance (my app is Intranet in a trusted environment) but
    I guess I can live with the more modern, secure, etc., SSH.
    
    Thanks very much for sharing your expert insight on this,
    (and if you are a writer deciding on a topic, I'll bet that
    this one will sell a lot of books! - anyone from O'Reilly
    out there?)
    
    -Ramon F Herrera
- 3
  - butting components right up against each otherOn Fri, 27 Jun 2003 13:29:59 GMT, Roedy Green <email***@***.com> wrote:
    
    > On Fri, 27 Jun 2003 14:06:22 +0100, Daniel Dyer
    > <email***@***.com> wrote or quoted :
    >
    >> Sorry, I didn't mean ipadx/ipady, that won't help. You certainly
    >> shouldn't need to use absolute positioning though. Do you have any
    >> sample code to show us?
    > I just wanted to put a string of JTextFields with black backgrounds
    > right against each other so they look like one continuous field.
    
    Have you tried setting the borders on the text fields to null? Maybe it's
    the borders that make it look like there's a gap. Have you tried a
    different layout (maybe try GridLayout, just to see if it looks the same,
    it's much simpler so it will be easier to spot if you've done something
    wrong).
    
    Dan.
    
    --
    Daniel Dyer
    Empathy Software (http://www.empathysoftware.com)
    
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- 4
  - DB Selection - J2MEHi,
    
    I am developing an application for PDAs using IBMs
    VM (J9). Now my problem is, that I want to store
    data on the device. Well, I am using J2ME with
    Personal Profile to do this, so file support is
    present in this configuration. Now I wonder if
    there exist solutions to store data and easily
    retrieve it. (commercial, free, open source)
    
    I have to store data on the device, add new
    data often, update and delete old data sometimes.
    
    1. So how do you store data, when not having present
    a complete RDBMS?
    2. There are RDBMS for this platform too.
    Any experiences using them?
    (for example Pointbase)
    3 There is this JDO Option (for example
    with ObjectDB) is this working well?
    4. What do you think of the following options,
    which I already found, but have no idea
    whether they will work?
    
    I alread checked:
    -JDMB (rather minimalistic, only key/value pairs to be saved)
    -JISP (produces rather big files -> not suitable for
    constrained devices?)
    -HSQL (Anybody got that to work within the mentioned configuration?
    I think mainly the java.sql.* classes are missing in the
    personal profile)
    -ObjectDB (OODB with JDO, no idea exactly if this will
    work for my purposes)
    
    Any help will be appreciated
    Rene
- 5
  - JTable and associating objects with nodesHi,
    
    Does anyone know how to store objects in a name value pair data structure
    (i.e. hashmap) in a JTable? It easy to store the name of the object but to
    store the object with the name, I am not sure.
    
    Any help would be great
    
    Thanks
    
    Bob
- 6
  - File upload with JSF.....Hi,
    i'm a new user of java. I have a question. I have to develop a JSF
    application that make user able to:
    
    1) Upload a txt file
    2) Showing to user columns and rows numbers of file.
    
    For this second operation i'have developed a java application that
    receive a txt file from a BufferedReader and counts rows and columns
    number.
    My questions are:
    
    1) How can i realize file upload with JSF?
    2) In which format a file is uploaded?
    3) Can i use my java application for counting rows and columns number
    of file?
    
    Can you help me?Please use easy concepts because i'm inexpert.....
- 7
  - gui builder for javaHi,
    
    I just started programming java and I am looking for a free gui builder for
    java on linux or windows platforms. Where can I find it.
    
    thanks
    
    Johan
- 8
  - How to control the cursor positon of java program in console mode?I am writing a small database that requires user input.
    
    However, whenever something is output to the screen, the cursor stays at the
    beginning of the output instead of the end of the output.
    
    How can I let it go to the end of the output?
    
    For example:
    
    say, the output is like this:
    
    This is a database. Please input your information below.
    prompt:>
    
    I want the cursor to go to after the ">" sign but it stays in front of
    "this" although whenever the user presses the keyboard it goes the end after
    ">".
    
    This is not a big problem but makes my application look not so professional.
    
    Anyway to cure this?
    
    John
- 9
  - Eclipse: browsing sourcecode using { as marksHello everyone,
    
    I am using eclipse 3.0.2 on Linux. Is it possible to browse
    Java-sourcecode using the brackets { as a jumping point?
    example
    
    public void foo(){ <- first entry
    
    if(isFoo){ <- second entry
    
    doFoo();
    
    }else{ <- third entry
    
    doAnotherFoo();
    
    }
    
    thanks alot for any help!
    
    kind regards
    
    Oliver
- 10
  - 'back engineering' java appletshi,
    
    is it possible to gain access to java code by a user using an applet over
    the web? i know with some scripting languages like PHP or javascript then
    users can view the code and 'back engineer' it to discover how it works etc.
    
    is this possible with java?
    
    thanks
- 11
  - XML Validation problemI am having alot of trouble getting a XML document validated with a
    schema.
    
    I got a sample document and schema off of w3schools.com, which passed
    an online xml validator:
    http://tools.decisionsoft.com/schemaValidate.html. I cannot, however,
    get them validated programmatically.
    
    The documents are:
    
    node.xsd:
    
    <?xml version="1.0"?>
    <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
    targetNamespace="http://www.w3schools.com"
    xmlns="http://www.w3schools.com"
    elementFormDefault="qualified"><xs:element name="note">
    <xs:complexType>
    <xs:sequence>
    <xs:element name="to" type="xs:string"/>
    <xs:element name="from" type="xs:string"/>
    <xs:element name="heading" type="xs:string"/>
    <xs:element name="body" type="xs:string"/>
    </xs:sequence>
    </xs:complexType>
    </xs:element></xs:schema>
    
    node.xml:
    
    <?xml version="1.0"?>
    <note
    xmlns="http://www.w3schools.com"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.w3schools.com note.xsd">
    
    <to>Tove</to>
    <from>Jani</from>
    <heading>Reminder</heading>
    <body>Don't forget me this weekend!</body>
    </note>
    
    I'm using java 1.5 currently, although I had problems with 1.4 and
    xerces, so I'm pretty confident the problem isn't related to the java
    version.
    
    My code is:
    
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    factory.setIgnoringElementContentWhitespace(true);
    factory.setIgnoringComments(true);
    SchemaFactory sFact =
    SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
    
    factory.setSchema(sFact.newSchema(new java.io.File(SCHEMA_FILE)));
    
    DocumentBuilder builder = factory.newDocumentBuilder();
    builder.setErrorHandler(new ErrorHandler() {
    public void warning (SAXParseException exception) throws SAXException
    {
    System.err.println(exception);
    }
    public void error (SAXParseException exception) throws SAXException {
    System.err.println(exception);
    }
    public void fatalError (SAXParseException exception) throws
    SAXException {
    System.err.println(exception);
    }
    });
    
    org.w3c.dom.Document doc = builder.parse(file);
    
    The error I recieve is:
    
    org.xml.sax.SAXParseException:
    http://www.w3.org/TR/xml-schema-1#cvc-elt.1?note
    org.xml.sax.SAXParseException:
    http://www.w3.org/TR/xml-schema-1#cvc-elt.1?note
    Exception in thread "main" java.lang.IllegalStateException
    at com.sun.org.apache.xerces.internal.jaxp.validation.ValidatorHandlerImpl$3.checkState(ValidatorHandlerImpl.java:411)
    at com.sun.org.apache.xerces.internal.jaxp.validation.ValidatorHandlerImpl$3.getElementTypeInfo(ValidatorHandlerImpl.java:441)
    at com.sun.org.apache.xerces.internal.jaxp.JAXPValidatorComponent$SAX2XNI.elementAug(JAXPValidatorComponent.java:299)
    at com.sun.org.apache.xerces.internal.jaxp.JAXPValidatorComponent$SAX2XNI.endElement(JAXPValidatorComponent.java:291)
    at com.sun.org.apache.xerces.internal.jaxp.XNI2SAX.endElement(XNI2SAX.java:163)
    at com.sun.org.apache.xerces.internal.jaxp.validation.XNI2SAXEx.endElement(XNI2SAXEx.java:108)
    at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.endElement(XMLSchemaValidator.java:818)
    at com.sun.org.apache.xerces.internal.jaxp.validation.ValidatorHandlerImpl.endElement(ValidatorHandlerImpl.java:339)
    at com.sun.org.apache.xerces.internal.jaxp.XNI2SAX.endElement(XNI2SAX.java:163)
    at com.sun.org.apache.xerces.internal.jaxp.JAXPValidatorComponent.endElement(JAXPValidatorComponent.java:206)
    at com.sun.org.apache.xerces.internal.xinclude.XIncludeHandler.endElement(XIncludeHandler.java:790)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(XMLDocumentFragmentScannerImpl.java:1241)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(XMLDocumentFragmentScannerImpl.java:1685)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:834)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:764)
    at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:148)
    at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:248)
    at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:292)
    at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:169)
    ...
    
    I am behind a web proxy, and I don't know if the validation process
    involves retrieving files at the URLs in the xml and xsd files, which
    could be the problem.
    
    can someone shed some light on this?
    
    Thanks in advance.
- 12
  - checkbox ploblem pls help!!i was new in java and i now completed add the checkbox in each node but the
    ploblem is i cant click the check box..
    what should i do in next step... pls help me thank you..
    following is my code
    
    fileTree.setCellRenderer(new DefaultTreeCellRenderer()
    {
    public Component getTreeCellRendererComponent(JTree tree, Object
    value,
    boolean sel, boolean expanded, boolean leaf, int row, boolean hasFocus)
    {
    super.getTreeCellRendererComponent(tree, value, sel, expanded, leaf,
    row, hasFocus);
    JCheckBox chk = new JCheckBox();
    chk.setContentAreaFilled(false);
    chk.setEnabled(true);
    //
    chk.setBorderPaintedFlat(true);
    chk.setOpaque(false);
    
    JPanel jPanel = new JPanel(new BorderLayout());
    jPanel.add(chk, BorderLayout.WEST);
    jPanel.add(this, BorderLayout.EAST);
    return jPanel;
    }
    
    --
    Message posted via http://www.javakb.com
- 13
  - Balanced TreeI was wondering if there were a built in (or freely available) library for
    handling balanced trees.
    
    I find many projects use them or could benefit from them.
    
    :)
- 14
  - using parameterized ArrayListI am trying to read write <Event> objects to an ArrayList ... but when
    I try to convert the arraylist back to the object arrayit gives me a
    ClassCastException for the line
    
    return (Event[]) a.toArray();
    
    --------------------------------------
    BufferedReader ois = null;
    ArrayList<Event> a = new ArrayList<Event>();
    try {
    
    ois = new BufferedReader(new FileReader(this.calFile));
    
    Event e = null;
    String line;
    
    while ((line = ois.readLine()) != null) {
    e = new Event(line);
    a.add(e);
    }
    ois.close();
    } catch (FileNotFoundException e) {
    
    e.printStackTrace();
    } catch (IOException e) {
    
    e.printStackTrace();
    } catch (ParseException e) {
    
    e.printStackTrace();
    } catch (InvalidTimeRangeException e) {
    
    e.printStackTrace();
    }
    if (a.isEmpty())
    return null;
    return (Event[]) a.toArray();
- 15
  - type safety in java 1.5 (bug or hole?)"John C. Bollinger" <email***@***.com> schrieb im Newsbeitrag
    news:c8g89n$esu$email***@***.com...
    
    > It would all the same be a nice complement to generics if the 1.5
    > compiler would indeed issue warnings about user-inserted casts that are
    > not provably correct. (I.e. those that the compiler cannot simply
    > ignore). That would give Bracha's comment (that started this confusion)
    > broad enough scope to no longer be confusing.
    
    I agree very much.
    
    BTW, there's another comment from Bracha in the very same paper that's
    confusing (me): He says "The Java virtual machine does not directly support
    overriding of methods with different return types. This feature is supported
    by the compiler.". What does this mean? Does this mean that the different
    return types are gone at run time? Here's an example:
    
    static class A {
    static A create() { return new A(); }
    public A m(A a) { System.out.println("A->A"); return a; }
    }
    
    static class B extends A {
    static B create() { return new B(); }
    public B m(A a) { System.out.println("A->B"); return (B) a; }
    public B m(B b) { System.out.println("B->B"); return b; }
    }
    
    public void testOverriding() {
    A a_a = A.create(); // static type A, dynamic type A
    A a_b = B.create(); // static type A, dynamic type B
    B b_b = B.create(); // static type B, dynamic type B
    
    A a2 = a_a.m(a_b); // prints: A->A
    A a3 = a_a.m(b_b); // prints: A->A
    
    A a5 = a_b.m(a_b); // prints: A->B <== overriding works
    A a6 = a_b.m(b_b); // prints: A->B <== overriding works
    
    B b2 = b_b.m(a_b); // prints: A->B
    B b3 = b_b.m(b_b); // prints: B->B
    }
    
    public void testReflection() {
    try {
    System.out.println(
    B.class.getMethod("m", new Class[] {A.class}).getReturnType()
    == B.class
    ); // prints: true <== reflection works, too
    }
    catch (Throwable t) {
    throw new RuntimeException("Laufzeitfehler", t);
    }
    }
    
    So there's obviously some runtime support for overriding methods with a
    different return type, because in this example both the overriding and the
    reflection worked. Then what did Bracha mean?
    
    2004-05-24, York.
    --
    werres at uni minus bremen.de
    http://www.uni-bremen.de/~werres