java-programmer >>Java application for GPRS connection

Java application for GPRS connection

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  - Java Print Service and WindowsIs there a way to print simple text using the Java Print Service under
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    It mostly works, the upper left corner of each 8.5" x 11" page is
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    only shows up when I draw to the printer -- not to the JFrame/ContentPane.
    
    What on earth could cause this? Any ideas?
    
    Thanks,
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  - Setting the SAX implementationHello everybody
    I'am using the org.xml.sax.helpers.ParserAdapter to read a
    XML file. When I launch my program, the jvm said that I haven't
    set the property org.xml.sax.xxx . I just use the Crimson implementation
    from de Sun jdk, but how to invocate it ?
    
    Alex...
    
    [PS] Sorry fro the frenglish...
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  - IO ExceptionHi,
    
    I have a Java application which takes in either the server name or IP
    address, domain name, user name and password, and copies the files
    from the specified server directory to the local C drive.
    
    It works perfectly fine when I run this on my local m/c and I can use
    either the server name or the server IP address.
    
    But when I move the jar file to a different workstation and execute it
    I get an IO exception - 'Source file does not exist' when I specify
    the server using its IP address. It still works on a different
    workstation when I pass the server name.
    
    Any clue as to why should it happen?
    
    Thanks,
    Beena
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  - draw line position - networkingThe code bellow will enable users to scrible anything on a canvas. Now
    what I intend to do is to create a vector object for every position
    (pre_x,pre_y,x, y) of the lines drawn on the canvas and send it using
    a socket connection to a remote server.
    
    public void mouseDragged(MouseEvent e)
    {
    if(isButtonPressed==true)
    {
    pre_x=e.getX()+scrollbarH_value;
    pre_y=e.getY()+scrollbarV_value;
    isButtonPressed=false;
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    x=e.getX()+scrollbarH_value;
    y=e.getY()+scrollbarV_value;
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    pre_y=y;
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    e.consume();
    message.setText(pre_x + ":" + pre_y + ":" + x + ":" + y);
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    Is my apporach considered to be feasible?. Any other ways?
    
    Regards.
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    public void myMethod (String name){
    
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    if(!condition2){
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    }
    
    When I call myMethod I want to distinguish between the different
    reasons for the same exception. Is it better to make my own
    exception ? What is my good practice?
    
    cheers,
    
    //mike
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  - Handling of DST in javaHi,
    Does java handle DST automatically ?
    I'm using java Gregorian calendar to get the time/date. Does this
    automatically give the local time/date iirrespective of DST or special
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  - Modify java AST before compilingHi !
    
    I'm trying to modify an Abstract Syntax Tree (a
    com.sun.tools.javac.tree.JCTree).
    
    I can get the AST with something like that:
    
    // new compiler, fileManager, compilationUnits1.....
    CompilationTask ct = compiler.getTask(null, fileManager, null, null,
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    JavacTask jt = (JavacTask)ct;
    try {
    Iterable trees = jt.parse();
    //... do something else here....
    } catch (IOException e) {
    e.printStackTrace();
    }
    
    Then, I obviously can walk throw the tree....
    
    I now want to modify this AST. Is there any simple way to achieve this
    ?
    For example, if a leaf is a JCBlock, I would like to do something like
    that (Just to test):
    
    ((JCBlock)t).stats.append(((JCBlock)t).getStatements().last());
    
    but it seems that everything is read-only in those JCTrees.
    
    Then, I would like to generate the .class with the modified tree... any
    idea ?
    
    Thank you !
    Best regards,
    
    Yohann Coppel.
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    What is the best way to store program configuration settings? Each
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  - DesktopManager implementation questionBefore I go reinventing the wheel, does anyone know of a pointer to a
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    Specifically, I'm looking for some set of behavior equal to or greater
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    When an internal frame is iconified AND the look and feel has
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    Right now what happens is that the iconified frame simply stays where it
    is. This is in keeping with a container that really doesn't have a
    layout manager, but it's not what a user would expect.
    
    Thanks in advance for any pointers; I have done my homework via Google,
    this newsgroup, etc. but haven't found anything. There are plenty of
    examples of putting a JDesktopPane into a JScrollPane, but for various
    reasons I'd really REALLY like to avoid this if possible.
    
    Thanks,
    Laird
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    All those .class have worked well in Tomcat 3. They were under
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    Now in Tomcat 4, they no longer work, even after re-compiling. Jsp's
    can longer connect to the beans (classes). What's my problem? Yes I
    noticed that all the simple jsp's did produced a .java and .class in
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    I also noticed there is a web.xml in each WEB-INF. Do I need to do
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    Thanks a lot,
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- 14
  - benchmarks? java vs .netJon Skeet [C# MVP] wrote:
    > On Jun 3, 4:39 pm, Jon Harrop <email***@***.com> wrote:
    >> FWIW, F#/Mono is 3x slower than F#/.NET on the SciMark2 benchmark. I'd like
    >> to know how performance compares between these platforms for parallel code.
    >
    > If Razii is genuinely comparing Java with Mono (I haven't looked at
    > any of the figures) it's a silly test to start with (unless you're
    > specifically interested in Mono, of course). The vast majority of C#
    > code runs on .NET rather than Mono - and while I applaud the Mono
    > team's work, I seriously doubt that it has quite has much effort going
    > into it as Microsoft is putting into .NET. I'd expect .NET to
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    I have frequently seen a x2 factor between MS .NET 2.0 and Mono 1.2 !
    
    Comparing with Mono is too easy.
    
    Arne
- 14
  - Swing GUI problem - after a compile, components shift back to original size/position.This is frustrating! I am designing a simple panel using the XYLayout. I
    quite often get into a situtation (not sure why/how) where I am aligning
    some components by multi-selecting them and choosing "Align Left" from the
    right-mouse context menu for example. The UI aligns them perfectly and
    things look great. BUT when I compile (Ctrl-Shift-F9) the components that I
    just aligned go right back to their old position. I see this sort of stuff
    ALL THE TIME using this GUI. I bring a component to the front of another
    object....re-compile, and poof! the component goes right back to the
    previous state. I have wasted literally hours and hours fighting JBuilder
    trying to get out of this situation. I delete the components, re add
    them...I try to go to the source and move contructors around and recompile.
    Sometimes it helps, but most times it does not.
    
    What is up?? I am using JBuilder 10. I would think version "10" would be a
    little more stable than this. I recently started using JBuilder again since
    moving from another IDE. I saw this same issue when I was using Jbuilder 7.
    
    Man is this frustrating.
    
    Any help please?
    
    Thanks in advanced.
- 15
  - Confusion between SCJP 1.5 and SCJP 1.6Hi,
    
    I want to give a SCJP certification.
    But now SCJP 1.6 is latest and I have prepared for SCJP 1.5.
    Can anyone tell me which will be best?
    
    If possible provide some useful links.
    
    Thanking in Advance
    Sanjeev

Author

Message

faith990

Posted: 2007-8-6 17:51:00

Top

java-programmer, Java application for GPRS connection I need to manage the GPRS connection (set up the connection, connect
and disconnect) in a symbol handheld device with Windows Mobile 5. I'm
developing this application with Java 1.3 and using IBM J9 as jvm. How
can I deal with this?

Many Thanks

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  - card shuffling errorI am relatively new to java programming and I am working on a card
    project for school. I had finished and tested every method with error
    in my Deck class. However, in the time it took to pick up dinner it is
    now producing errors. I would greatly appreciate anyone input and help.
    This is the error that is produce when invoking the shuffle method.
    
    java.lang.IndexOutOfBoundsException: Index: 235, Size: 51
    at java.util.ArrayList.RangeCheck(ArrayList.java:546)
    at java.util.ArrayList.get(ArrayList.java:321)
    at Deck.swap(Deck.java:176)
    at Deck.shuffle(Deck.java:129)
    
    public class Deck
    {
    /** The number of cards in a deck */
    public static final int DECK_SIZE = 52;
    /** The number of times to shuffle */
    public static final int TIMES_TO_SHUFFLE = 1000;
    
    private ArrayList deck; // a deck of cards
    
    /**
    * Constructor for objects of class Deck
    */
    public Deck()
    {
    deck = new ArrayList();
    newDeck();
    }
    
    /**
    * Load a new deck with all DECK_SIZE cards
    */
    public void newDeck()
    {
    if (deck.size() > 0){
    deck = null;
    }
    else{
    //Hearts
    deck.add(new Card("Ace","Hearts",11));
    deck.add(new Card("Two","Hearts",2));
    deck.add(new Card("Three","Hearts",3));
    deck.add(new Card("Four","Hearts",4));
    deck.add(new Card("Five","Hearts",5));
    deck.add(new Card("Six","Hearts",6));
    deck.add(new Card("Seven","Hearts",7));
    deck.add(new Card("Eight","Hearts",8));
    deck.add(new Card("Nine","Hearts",9));
    deck.add(new Card("Ten","Hearts",10));
    deck.add(new Card("Jack","Hearts",10));
    deck.add(new Card("Queen","Hearts",10));
    deck.add(new Card("King","Hearts",10));
    
    //Diamonds
    deck.add(new Card("Ace","Diamonds",11));
    deck.add(new Card("Two","Diamonds",2));
    deck.add(new Card("Three","Diamonds",3));
    deck.add(new Card("Four","Diamonds",4));
    deck.add(new Card("Five","Diamonds",5));
    deck.add(new Card("Six","Diamonds",6));
    deck.add(new Card("Seven","Diamonds",7));
    deck.add(new Card("Eight","Diamonds",8));
    deck.add(new Card("Nine","Diamonds",9));
    deck.add(new Card("Ten","Diamonds",10));
    deck.add(new Card("Jack","Diamomds",10));
    deck.add(new Card("Queen","Diamonds",10));
    deck.add(new Card("King","Diamonds",10));
    
    //Spades
    deck.add(new Card("Ace","Spades",11));
    deck.add(new Card("Two","Spades",2));
    deck.add(new Card("Three","Spades",3));
    deck.add(new Card("Four","Spades",4));
    deck.add(new Card("Five","Spades",5));
    deck.add(new Card("Six","Spades",6));
    deck.add(new Card("Seven","Spades",7));
    deck.add(new Card("Eight","Spades",8));
    deck.add(new Card("Nine","Spades",9));
    deck.add(new Card("Ten","Spades",10));
    deck.add(new Card("Jack","Spades",10));
    deck.add(new Card("Queen","Spades",10));
    deck.add(new Card("King","Spades",10));
    
    //Clubs
    deck.add(new Card("Ace","Clubs",11));
    deck.add(new Card("Two","Clubs",2));
    deck.add(new Card("Three","Clubs",3));
    deck.add(new Card("Four","Clubs",4));
    deck.add(new Card("Five","Clubs",5));
    deck.add(new Card("Six","Clubs",6));
    deck.add(new Card("Seven","Clubs",7));
    deck.add(new Card("Eight","Clubs",8));
    deck.add(new Card("Nine","Clubs",9));
    deck.add(new Card("Ten","Clubs",10));
    deck.add(new Card("Jack","Clubs",10));
    deck.add(new Card("Queen","Clubs",10));
    deck.add(new Card("King","Clubs",10));
    }
    }
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    {
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    */
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    deck.removeAllElements();
    
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    index2 = (int)(Math.random()*TIMES_TO_SHUFFLE);
    swap (index1, index2);
    }
    }
    
    /**
    * Display the entire contents of the deck. Not used in the
    * game but useful for debugging.
    */
    
    public void showDeck()
    {
    Iterator it = deck.iterator();
    while(it.hasNext()) {
    Card currentCard = (Card) it.next();
    System.out.println(currentCard);
    }
    }
    
    /**
    * Remove the top card from the deck.
    * @return the Card object removed or null if there is nothing in
    the deck.
    */
    public Card takeCard()
    {
    int index = 0;
    if (index >= deckSize()) {
    return null;
    }
    else{
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    }
    }
    
    /**
    * Return size of deck
    */
    public int deckSize()
    {
    return deck.size();
    }
    
    /**
    * Card Swap method
    */
    public void swap(int index1, int index2) {
    Card temp = (Card)deck.get(index1);
    deck.set(index1, deck.get(index2));
    deck.set(index2, temp);
    }
    
    /**
    * Methods returns card index and card description - testing
    purpose
    */
    public void displayCardIndex()
    {
    for (int index = 0; index < deckSize(); index++)
    {
    System.out.println("Index: " + index + " Card : " +
    deck.get(index));
    }
    }
    
    }
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    public boolean upload() throws Exception{
    boolean done = false;
    String file_name = file.getName();
    String file_data = readFile();
    
    StringBuffer response = new StringBuffer("");
    
    OutputStream os = null;
    BufferedReader in = null;
    HttpURLConnection conn = null;
    
    try{
    URL serverURL = new URL(url);
    // connect to server
    URLConnection uc = serverURL.openConnection();
    conn = (HttpURLConnection) uc;
    conn.setAllowUserInteraction(true);
    conn.setInstanceFollowRedirects(true);
    // set connection as POST
    conn.setRequestMethod("POST");
    
    conn.setDoOutput(true); // turns it into a post
    
    // setup headers
    conn.setRequestProperty(
    "Content-Type",
    "multipart/form-data; boundary=" + CONTENT_BOUNDARY);
    
    conn.setRequestProperty("Accept-Language", "en-us");
    conn.setRequestProperty("Accept-Encoding", "gzip, deflate");
    
    conn.setRequestProperty("CACHE-CONTROL", "no-cache");
    
    os = conn.getOutputStream();
    
    String request =
    "--"
    + CONTENT_BOUNDARY
    + "\r\n"
    + "Content-Disposition: form-data; name=\"upfile\"\r\n\r\n"
    + file_name
    + "\r\n"
    + "--"
    + CONTENT_BOUNDARY
    + "\r\n"
    + "Content-Disposition: form-data; name=\"upfile\"; filename=" +
    file_name
    + "\r\nContent-Type: multipart/form-data\r\n\r\n"
    + file_data //file is read into a string here, is it OK? But no
    other choose.
    + "\r\n"
    + "--"
    + CONTENT_BOUNDARY
    + "\r\n";
    
    System.out.println("DEBUG: Sending the following request:\n\r" +
    request);
    System.out.println("DEBUG: Sending the post request...\n\r");
    os.flush();
    
    os.write(request.getBytes(), 0, request.getBytes().length);
    os.flush();
    
    in = new BufferedReader(new
    InputStreamReader(conn.getInputStream()));
    String inputLine;
    
    while ((inputLine = in.readLine()) != null) {
    response.append(inputLine);
    }
    
    // closing connections
    in.close();
    in = null;
    os.close();
    os = null;
    conn.disconnect();
    conn = null;
    
    done = true;
- 15
  - Help with writing simple parser for HTML/XMLI'm having trouble getting started with coding a simple parser and prototype
    for my application.
    
    The parser needs to parse HTML & XML pages to strip the tags and return just
    the data. Ive read thru sevral java refeerence books but seem to be having
    trouble getting started with the code.
    
    I'd be gratefull for a push in the right direction.
    
    thanks
    
    sal
    
    ps this is my final year University Computer Science project
    
    for more details on the project
    http://www.mellowmoose.org/project.html