java-programmer >>Appletee, Servletee kind of newbie question!

Appletee, Servletee kind of newbie question!

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- 1
  - 1.5 ignoring networkaddress.cache property?I've noticed that 1.5 seems to be ignoring the value set for
    networkaddress.cache.negative.ttl in
    $JAVA_HOME/jre/lib/security/java.policy when a DNS request times out.
    
    In one of my forms I validate user-provided URLs by trying to fetch them
    and ensuring I get a reasonable response (e.g., not 404, 403, 500, etc).
    
    If the DNS request for the hostname in the URL times out once, the JRE
    never tries a lookup again. I've verified that it isn't asking by
    snooping DNS traffic on my loopback with tcpdump.
    
    Positive lookups do cache properly. Negative lookups that *don't* time
    out (ie, they get an NXDOMAIN response) also seem to obey the
    networkaddress.cache.negative.ttl property.
    
    So the behaviour seems to be that a DNS timeout is cached forever, whereas
    postive or negative responses are cached according to
    networkaddress.cache.*.
    
    Nick
    
    --
    "Courage isn't just a matter of not being frightened, you know. It's being
    afraid and doing what you have to do anyway."
    Doctor Who - Planet of the Daleks
    This message has been brought to you by Nick Johnson 2.3b1 and the number 6.
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- 1
  - JTable model's issueHi:
    
    I have got a JTable and its cells are JPanel's (to make Java2D inside)
    displaying numbers.
    
    The problem is that I want the cells to be editable, so when you click on
    the cell, you could write some number, and the new one be redisplayed.
    I wrote a method called setValue() on the AbstractTableModel class which
    updates the selected JPanel numerical value, but there is a little problem:
    when you click a cell, you get a line full of info about the JPanel, so if
    you want to enter a number, you have to clear the cell to avoid getting an
    error.
    
    so the question is, is there a way to avoid the info to get displayed? note
    that my AbstractTableModel getValue() method needs to return a JPanel..
    
    Thanks !!
    
    --
    
    PGR
- 1
  - Spring and hibernate: all these jars?All,
    just downloaded the latest spring RC. I've set up a super simple test, and
    had to work through a lot of classpath issues, starting with just the
    spring, logging, and hibernate jars and then adding jars to the classpath
    until the errors went away. here's what i finally ended up with. Does this
    look correct?
    
    I'm not so much concerned about it if it's really what's needed, but I don't
    want to run into conflicts and such down the road. So mostly i'm worried i
    might have screwed something up. Here's what I have (from eclipse):
    
    <classpathentry kind="lib" path="lib/activation.jar"/>
    <classpathentry kind="lib" path="lib/antlr-2.7.6.jar"/>
    <classpathentry kind="lib" path="lib/c3p0-0.9.1-pre6.jar"/>
    <classpathentry kind="lib" path="lib/commons-collections-2.1.1.jar"/>
    <classpathentry kind="lib" path="lib/commons-lang-2.1.jar"/>
    <classpathentry kind="lib" path="lib/commons-logging-1.1.jar"/>
    <classpathentry kind="lib" path="lib/dom4j-1.6.1.jar"/>
    <classpathentry kind="lib" path="lib/ehcache-1.2.jar"/>
    <classpathentry kind="lib" path="lib/hibernate3.jar"/>
    <classpathentry kind="lib" path="lib/cglib-nodep-2.1_3.jar"/>
    <classpathentry kind="lib" path="lib/jta.jar"/>
    <classpathentry kind="lib" path="lib/jtds-1.2.jar"/>
    <classpathentry kind="lib" path="lib/log4j-1.2.13.jar"/>
    <classpathentry kind="lib" path="lib/spring.jar"/>
- 1
  - Initialization order brain-damageHi y'all,
    
    So after spending a particularly frustrating afternoon debugging
    through constructors and browsing the Java Language Specification 3.0
    in some detail, I have come to the conclusion that I actually know
    nothing and need to ask a question:
    
    What is the standard order of evaluation of expressions during object
    construction w/rt constructors, super-constructors, and instance
    variable initializers? Specifically with the code:
    
    class A
    {
    AType a1 = new AType();
    
    A() { aDoesSomething(); }
    }
    
    class B extends A
    {
    AnotherType b1 = new AnotherType();
    
    B() { bDoesSomethingElse(); }
    }
    
    B bongo = new B();
    
    when do all of the various bits get executed? If there's a section of
    the language spec that tells me this, I would really appreciate the
    pointer, as well...
    
    david rush
- 1
  - looking for a Java decompilerHello!
    
    Is there a good byte-code de-compiler in the ports? It does not
    need to be fancy/GUI -- just a straghtforward .class->.java utility.
    
    Thanks for any pointers. Thanks!
    
    -mi
- 4
  - modificare un modello della libreria jgraphAvete mai usato la libreria jgraph per i vostri progetti?
    Devo graficare lo schema di un datawarehouse che ho in XML, e modificarlo
    attraverso l'interazione dell'utente (per la modifica e la visualizzazione
    sto cercando di usare jgraph).
    Una volta modificato il grafico, devo salvare i dati nel file XML.
    
    Il mio problema ?che riesco a visualizzare i dati XML nel grafico Jgraph, e
    modificare quest'ultimo, ma a causa delle classi utilizzate
    (DefaultGraphCell) non riesco a salvare queste trasformazioni in termini di
    nodi del file XML.
    
    Dalla documentazione in rete ho capito che devo estendere e modificare la
    classe GraphModel e la classe DEfaultGraphCell, ma senza un esempio o
    documentazione precisa non riesco a capire quali metodi devo sovrascrivere
    e cosa devo modificare per ottenere il risultato voluto.
    
    Per questo motivo sono bloccato da giorni nella mia tesi, e ci sto perdendo
    un
    po' la testa, vi prego di darmi una mano (anche dirmi dove devo leggere).
    
    Grazie in anticipo!
- 4
  - help needed @ Taskbar dimensions (screen size- taskbar size)Hi All,
    
    I'm bulding a stand-alone-java GUI application.
    This application is expected to run both on Windows & Linux
    The content of GUI window is self configration at run time with csv
    file.
    
    Now my problem is " how to set size of GUI application window"
    
    java.awt.Toolkit.getDefaultToolkit() can get me user's full screen-size
    but u never know about user's taskbar dimensions. it can be
    vertical/horizontal/auto-hide.
    
    How could I get the actual working area for my applciation
    i.e. DIMENSIONS_OF_SCREEN_SIZE - DIMENSIONS_OF_TASKBAR
- 6
  - String ManipulationAlternatively, if you have the ability to change the XML, put them as
    two separate fields in the XML. After all, the use of a comma is a
    means of overloading the field.
    
    On Jul 13, 8:57 am, "email***@***.com" <email***@***.com> wrote:
    > Hey everyone, I have a string that is returned from an xml file as two
    > coordinates for example 23.424242,42.13131 exactly like that with no
    > spaces, what is a way to break it into two seperate integers?
- 10
  - variable "retriever" might not have been initialized - confused[CODE]
    String message = "", send = "", quit = "", errorMsg = "", cookie =
    "";
    boolean hasSubmittedMessage;
    HTMLRetriever retriever;
    
    // SEND MESSAGE TO SERVLET
    if (hasSubmittedMessage && send.length() > 0) {
    try { // USING NEW VERSION OF URLEncoder.encode() THAT REQUIRES
    try{} BLOCK DUE TO NEW 2ND PARAMETER OF ENC-TYPE
    retriever = new HTMLRetriever(ChatGlobals.SERVLET_SELF +
    "/ppowell.ChatServlet?message=" +
    URLEncoder.encode(message, "UTF-8") +
    "&nickname=" +
    URLEncoder.encode(cookie, "UTF-8")
    ); // SEND MESSAGE
    } catch (UnsupportedEncodingException uee) {
    errorMsg = "Error involving message submittal: " + uee.toString();
    } catch (Exception e) {
    errorMsg += "Unknown error: " + e.toString();
    }
    } else if (hasSubmittedMessage && quit.length() > 0) {
    try { // USING NEW VERSION OF URLEncoder.encode() THAT REQUIRES
    try{} BLOCK DUE TO NEW 2ND PARAMETER OF ENC-TYPE
    retriever = new HTMLRetriever(ChatGlobals.SERVLET_SELF +
    "/ppowell.ChatServlet?message=" +
    URLEncoder.encode("/q", "UTF-8") +
    "&nickname=" +
    URLEncoder.encode(cookie, "UTF-8")
    ); // SEND "QUIT" COMMAND
    } catch (UnsupportedEncodingException uee) {
    errorMsg += "Error involving message submittal: " + uee.toString();
    } catch (Exception e) {
    errorMsg += "Unknown error: " + e.toString();
    }
    }
    
    try {
    if (retriever.getHTML() != null && quit.length() > 0)
    out.println("<script type=\"text/javascript\">\n\n</script>\n");
    } catch (Exception e) {} // DO NOTHING
    
    // STUFF
    
    [/CODE]
    
    Produces this error:
    
    [ERROR]
    /~ppowell/includes/chat_submit_message.jsp:63: variable retriever might
    not have been initialized
    if (retriever.getHTML() != null && quit.length() > 0)
    [/ERROR]
    
    I can't figure out why since I'm capturing all errors because
    "retriever" might not be initialized, which is the case if
    hasSubmittedMessage = false. You see, if the user hasn't yet submitted
    a message, nothing can be sent to the servlet, thus, the HTMLRetriever
    variable "retriever" will not be initialized into a class object
    because it can't unless it receives a value, which it can only do so
    upon the right conditions, otherwise, no value can be passed into
    "retriever".
    
    Anyone know what I can do about this? I'm sorry but once again in PHP
    this is not a problem, and I'm sorry but I have no choice but to
    "translate" PHP scripts into JSP due to client dropping PHP support.
    
    Thanx
    Phil
- 10
  - [Quantian-general] Weka Machine Learning Environment
    Bob,
    
    [ BTW I had to manually approve your post as you're not (yet ?) subscribed
    here -- please consider subscribing to that you can post directly. ]
    
    On 5 November 2005 at 12:09, email***@***.com wrote:
    | I would be very interested in seeing the Weka machine learning environment
    | added to a live-DVD, such as Quantian. Weka is a powerful, open-source
    | data mining package with many artificial intelligence algrorithms, created
    | at the University of Waikato in New Zealand. It is written in Java, and so
    
    Sure, I'm aware of Weka and their book, but have never installed it as I find
    Java so tedious to work with.
    
    I also have limited time and bandwidth for figuring out suggested packages.
    If you could help with Weka, for example by installing Knoppix 4.0.2
    (possibly the cdrom version) to disk and then documenting what you to do to
    install Weka, and make it work well, I'd be helped quite a bit. Ideally, of
    course, would be a Debian package encapsulating all this. It may be
    worthwhile mentioning this to the good folks over at debian-java -- cc'ed. [
    Debian-java'ers, please CC us back directly on follow-ups. ]
    
    | is platform independent. There is also a version that can be set up in a
    | cluster configuration, called Cluster Weka.
    
    I didn't know that. What messaging toolkit do they use? Something like PVM or
    LAM, or something homegrown?
    
    | If you are interested, the website is:
    |
    | http://www.cs.waikato.ac.nz/ml/weka/
    |
    | Your work on the Quantian project is marvelous, and I applaud your efforts,
    | and your contribution to the open-source community.
    
    Thanks for your interest in Quantian, and the kind words.
    
    Cheers, Dirk
    
    | Bob McPherson
    |
    |
    | _______________________________________________
    | Quantian-general mailing list
    | email***@***.com
    | http://lists.alioth.debian.org/mailman/listinfo/quantian-general
    
    --
    Statistics: The (futile) attempt to offer certainty about uncertainty.
    -- Roger Koenker, 'Dictionary of Received Ideas of Statistics'
    
    --
    To UNSUBSCRIBE, email to email***@***.com
    with a subject of "unsubscribe". Trouble? Contact email***@***.com
- 12
  - java based cell phone capabilitysPlease bear with me, am old and somewhat out of touch with
    technology....
    
    Is there a cell phone that can access an web page with an mp3 playing
    applet and play mp3's downloaded from the web site.
    
    Robert
- 12
  - Detect XP themeDear NG,
    
    One simple question: How can I detect
    whether a windows user uses xp theme
    or windows classic?
    
    TIA,
    Jens
- 13
  - Bind to a specific interface
    Hello:
    
    One of my peers just asked if there is a way to
    bind a socket to a specific interface on a dual
    homed machine in a Java Application. I believe there
    is but I cannot find this documented. Could someone
    forward me a pointer to where this is described?
    
    Thanks,Steve
- 13
  - How to separate interface from implementation when using JARs?Hi,
    
    In an engineering world where I used to be working with C++ I am now
    shiftnig to Java. In C++ I would publishe my interfaces in header
    files. In Java I can use the interface concept.
    However this is not sufficient for me. I want to be able to full
    separate the implementation from the interface of e.g. a class method.
    
    Example:
    
    public interface MyMath {
- 16
  - EncryptionSimple question... sorry..
    
    I'm trying to encrypt a string with a private key (retrieved from
    KeyStore - that I created using keytool). So that I can send the
    public key to the client to decrypt the string.
    
    The problem I'm having is (partially from the Java's Developer's
    Almanac).
    
    java.security.InvalidKeyException
    at com.sun.crypto.provider.DESCipher.engineGetKeySize(DashoA6275)
    at javax.crypto.Cipher.init(DashoA6275)
    at DesEncrypter.<init>(DesEncrypter.java:24)
    
    DesEncrypter(Key key)
    throws InvalidAlgorithmParameterException, NoSuchPaddingException,
    NoSuchAlgorithmException, InvalidKeyException
    {
    // Create an 8-byte initialization vector
    // byte[] iv = new byte[]{
    // (byte)0x8E, 0x12, 0x39, (byte)0x9C,
    // 0x07, 0x72, 0x6F, 0x5A
    // };
    // AlgorithmParameterSpec paramSpec = new IvParameterSpec(iv);
    ecipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
    dcipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
    
    // CBC requires an initialization vector
    24: ecipher.init(Cipher.ENCRYPT_MODE, key); //, paramSpec);
    
    The "key" problem I'm having is that the code actually uses the
    "SecretKey" to the class, but I'm retrieving a "Key" private key from
    the store.
    
    I know I'm missing something..
    
    Ian

Author

Message

Andrew Tucker

Posted: 2003-8-23 14:17:00

Top

java-programmer, Appletee, Servletee kind of newbie question! Hi everyone,

I am having real problems working out whats going on w/ my applet. I want to
be able to send an object from an applet to a servlet, here is the code for
the listener method causing the trouble:

private void addClientListener(java.awt.event.MouseEvent evt) {

System.out.println("Got this far, addClientListener.");
try {
URL fileURL = new URL(getDocumentBase(),
"servlet/MaintSchedServ");
URLConnection conn = fileURL.openConnection();

conn.setDoOutput(true);
conn.setDoInput(true);
conn.setUseCaches(false);

conn.setRequestProperty("addClient", "true");

ObjectOutputStream out = new ObjectOutputStream(new
BufferedOutputStream(

conn.getOutputStream()));

out.writeObject(textField1.getText());
out.close();

} catch( Exception exc ) {
exc.printStackTrace();
}
}
I apologise if my usage of setRequestProperty is incorrect, i need to pass
several different objects to servlet and thought that by using this method
of URLConnection, i could evaluate this at servlet and handle each case
seperately. If there is a better way i would love to know how!

Here is the java console output, it is saying that i need to set doOutput =
true, well i am aren't I?

Thankyou in advance for any direction you can give me!!

Andrew.

Java(TM) Plug-in: Version 1.4.1_02
Using JRE version 1.4.1_02 Java HotSpot(TM) Client VM
User home directory = C:\Documents and Settings\Andrew Tucker
/*
options
*/
Stopping applet ...
Unregistered modality listener
Joining applet thread ...
Destroying applet ...
Disposing applet ...
Joined applet thread ...
Quiting applet ...
Finding information ...
Releasing classloader: sun.plugin.ClassLoaderInfo@4865ce, refcount=0
Caching classloader: sun.plugin.ClassLoaderInfo@4865ce
Current classloader cache size: 1
Done ...
Registered modality listener
Referencing classloader: sun.plugin.ClassLoaderInfo@4865ce, refcount=1
Loading applet ...
Initializing applet ...
Starting applet ...
Got this far, addClientListener.
java.net.ProtocolException: cannot write to a URLConnection if
doOutput=false - call setDoOutput(true)
at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(Unknown
Source)
at AWTMaintSchedGUI.addClientListener(AWTMaintSchedGUI.java:114)
at AWTMaintSchedGUI.access$000(AWTMaintSchedGUI.java:17)
at AWTMaintSchedGUI$1.mouseClicked(AWTMaintSchedGUI.java:51)
at java.awt.Component.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Button.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

Index ‹ java-programmer

Next
- 1
  - jdk-1.4.1 plugin & Yahoo ChatWell, now that the plugin is working w/ 1.4.1 (w/ p4) I decided to give it
    a whirl. I upgraded the plugin Mozilla Firebird uses by changing the
    symbolic link /usr/X11R6/lib/browser_plugins/libjavaplugin_oji to link to
    /usr/local/jdk1.4.1/jre/plugin/i386/ns610/libjavaplugin_oji.so instead.
    Sure enough, about:plugins showed 1.4.1 now instead of 1.3.1. So the first
    place I decided to try was Yahoo Chat since I had the most quirks with it
    and 1.3.1.
    
    Right away, I start noticing new problems. I tried clicking on the black
    box to choose a font color, and Firebird crashed. Then I tried
    double-clicking on a name to get more info, and Firebird crashed again.
    Both these actions normally pop up a new small window on top of the chat
    session, so it seems like anything on Yahoo Chat that opens a new java box
    crashes Firebird.
    
    My other problem is, I can't seem to switch back to 1.3.1! I renamed
    libjavaplugin_oji.so to libjavaplugin_oji.so.14 and created a new
    libjavaplugin_oji.so link to point back to 131's ns600/libjavaplugin_oji
    but even closing and restarting Firebird, about:plugins still shows 1.4.1.
    Epiphany does the same thing. How to I switch back?
    
    Glad to see the progress though. :)
- 2
  - OT:News readers..so many to choose fromWell I've abandoned google groups for the time being and have switched
    over to PAN on Linux and Gravity on Windows. What I am wondering is,
    how hard would it be to write a news reader client in Java? I know it's
    way beyond me, but there must be people reading this ng who have had
    some degree of sucess at it. What was the process you went through to
    design and build the program? How much practical experience would one
    need to be able to sucessfully code such a program? If you know that
    you need say, a class that will send a request to a news server, how do
    you go about finding it in the API documentation? And if you don't find
    one, do you write your own or simply extend one that is already there,
    and is close to what you need? I have a book on OO Design coming, but
    it would be interesting to know what others think. I know this is
    pseudo-off topic, which is why I put the OT in the subject line. This
    is my first post using Gravity so it may not work, but if it does, I
    hope we can have a good discussion about this topic, if it hasn't
    already been hash(tabled) before.
    
    Cheers
- 3
  - Notification ServiceHi all,
    
    I'm using openORB.
    How can I test if the properties EventReliability and PersistentRealiability
    work? I have made my own channel, admin and proxy with these properties
    but I don't understand how I can try them.
    
    Thanks,
    ReX
- 4
  - Bad performance of HTTPServletResponse at TomcatHi ,
    I have a serious bad performance problem when under the load.
    When I make a load test of 20 users, I see a bottleneck on the writing
    of the response.
    The lenght of the message up to 50K , but writting to outputstream
    takes about 40 seconds.
    
    Thanks in advance, Sasha
- 5
  - Performance Q: java hotspot vs. native codeIn each of these two cases, would optimized C run substantially faster
    than Java (hotspot or other JIT VM)?
    
    * A number-crunching algorithm with a tight loop and a large number of
    iterations (from
    thousands potentially up to millions, or more) using doubles.
    
    * Ditto, but with the C code using arrays of uints and carries to
    effect a high precision
    fixed-point math, and the Java code using BigDecimals.
    
    * Ditto, but with roll-your-own Java BigDecimal-alikes using arrays and
    math.
    
    If there's an even higher performance option (short of compile-to-FPGA
    :)) for the high-precision cases, please let me know about that as
    well. (I know when it gets up into the 500+ digits it can be faster to
    use FFT for the multiplies -- O(n log n) vs O(n^2). I'll cross that one
    when I come to it.)
- 6
  - webpages on TomcatHi,
    I am a JSP newbie. I installed apache tomcat on my PC. I can view all
    the example JSP pages at http://localhost:8080/jsp-examples/. The files
    themselves reside at C:\Program Files\Apache Software Foundation\Tomcat
    5.0\webapps\jsp-examples.
    
    So I created a html and a JSP page in C:\Program Files\Apache Software
    Foundation\Tomcat 5.0\webapps\. but i can't seem to view them via http.
    
    Am I missing something really fundamental here?
    Any help will be greatly appreciated!
    
    Eddy
- 7
  - GUI API for Micro DevicesI was searching around on the Java Micro Edition docs for something about
    designing a GUI for micro devices (four buttons, small LCD screen size,
    compact widgets). Couldn't find anything on SUN's site, mostly due to too many
    links probably.
    
    Could someone point me to some API Docs for Micro Edition GUI stuff? Or if no
    such thing exists for Sun, is there a commonly used widgets API somewhere
    else?
    
    - Brian
- 8
  - Eclipse memory setting and other tricksHi,
    
    1-
    First, don't give eclipse more heap, because it doesn't need it, or at least don't give too much.
    If you give a JVM more heap, IT WILL GRAB IT, but only to pile more garbage
    and the Full GC will just take longer, especially because it must swap in
    from virtual memory before being able to run finalizers if any.
    The reason why you feel it works better, is because it fullgc's less frequently.
    
    The only bug is the JVM that doesn't release unused heap yet. (maybe jdk 1.5...)
    
    Write a small program that invokes the elipse main and give
    yourself a way to invoke System.gc() (ui button, read stdin for "gc", whatever...)
    and report the time it took, and the before/after memory used/free/total (see java.lang.Runtime)
    The reason I suggest that, is to monitor in how much heap eclipse really fits in.
    If you gc and never sees more that 30 megs. you should be fine with the default 64 meg.
    
    See ExtraSimpleConsoleDebugger.java below.
    Feel free to add commands like listing threads, system properties, current time, etc...
    
    2-
    Do not minimize your eclipse window. What?
    Yes that's right. Windoze has this bad habit, although some think it's nice,
    to schedule parts of a foreground app memory for swap out to paging file as soon as minimized.
    If you keep eclipse running over night, you know what I mean...
    If you got the GC trick above, leave the eclipse window minimized overnight and
    without restoring the window, invoke gc when coming in the morning.
    You should get 1-3 minutes GCs! (it is swapping in). (2nd tip: close eclipse everyday...!)
    
    Another trick during day is to keep eclipse de-maximized but not minimized, in a window that I
    resized to barely have the title bar, and I toss it in a corner.
    This way, it is not swapped out, and you can totally see your desktop.
    Kind of like those new window manager, that rolls up windows in a thin bar.
    
    3-
    Hotspot jit compiled code takes place too! If eclipse has been running for hours, it
    is then fairly jit compiled. The default jit threshold is 1500 invocations. So the trick,
    (if you worry about ram but not CPU) is to disable the JIT, or set the threshold very high.
    (-Xint to disable, or -XX:CompileThreshold=####)
    On the opposite, if you want performance and got plenty of ram, set it lower.
    But 1500 is fairly low already. Just remember that JIT compiling take a bit of extra time also,
    So a too-low threshold will slow down even more the startup.
    
    4-
    GC options.... I tried so many, but frankly, on a single CPU, you can't do much tuning.
    You can try. Maybe your hyperthreaded CPU on winXP will kick in and give good results...
    
    5-
    Here is my eclipse launch batch file:
    fyi: I just update my eclipse by copying my workspace folder to the freshly unzipped eclipse sdk.
    At first run, it converts anything it has to, and recreate the .config/ folder, and exits.
    
    Don't worry, you run eclipse a 2nd time. That double start is invisible when you use eclipse.exe.
    
    Hope this helps.
    
    (And I hope your reader doesn't wrap lines...)
    
    ----------------------------------------------------------------
    
    @echo off
    rem set idepath=C:\java\eclipse_3.0_i20030806
    rem set idepath=c:\java\eclipse_3.0_i20040106
    rem set idepath=c:\java\eclipse_3.0_i20040121
    set idepath=c:\java\eclipse_3.0M7
    rem set idepath=C:\java\eclipse_3.0_i20040226
    
    rem ----------------------------------------
    
    rem set jvmpath=C:\java\j2sdk1.4.1\bin
    set jvmpath=C:\java\jdk14\bin
    cd /d %idepath%
    
    set jvm=%jvmpath%\java.exe -showversion
    
    rem set memoryspec=-Xms32m -Xmx128M -XX:NewRatio=8 -XX:SurvivorRatio=4
    rem set memoryspec=-Xms32m -Xmx64M -XX:NewRatio=8 -XX:SurvivorRatio=4
    rem set memoryspec=-Xms32m -Xmx96M
    
    rem set jitspec=-XX:CompileThreshold=10
    rem set jitspec=-XX:CompileThreshold=5
    set jitspec=
    
    rem set gcspec0=-verbosegc -XX:+PrintGCDetails -XX:+PrintTenuringDistribution -XX:+DisableExplicitGC
    set gcspec0=-verbosegc
    
    rem (throughput) UseParallelGC
    rem set gcspec=-XX:+UseParallelGC
    
    rem (low pause concurent) concurent mark-sweep
    rem set gcspec=-XX:+UseConcMarkSweepGC
    
    rem (low pause concurent) concurent mark-sweep with concurrent remark
    rem set gcspec=-XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+CMSParallelRemarkEnabled
    
    rem (low pause concurent) concurent mark-sweep with concurrent remark with defrag oldgen
    rem set gcspec=-XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+CMSParallelRemarkEnabled -XX:+UseCMSCompactAtFullCollection
    
    set gcspec=
    
    rem ------------------------------------------
    
    @echo on
    %jvm% %memoryspec% %jitspec% %gcspec0% %gcspec% -cp %idepath%\startup.jar org.eclipse.core.launcher.Main org.eclipse.ui
    @echo off
    
    rem With commandline/UI tool (to run GC and get memory stats):
    rem %jvm% %memoryspec% %jitspec% %gcspec0% %gcspec% -cp c:\java\prog\tools.jar;%idepath%\startup.jar ExtraSimpleConsoleDebugger -is 2222 org.eclipse.core.launcher.Main org.eclipse.ui
    
    ----------------------------------
    
    import java.io.*;
    import java.lang.reflect.Method;
    import java.net.*;
    
    public class ExtraSimpleConsoleDebugger {
    static String EOL = "\r\n";//System.getProperty("line.separator");
    
    private PrintStream cd_ps_out = null;
    public ExtraSimpleConsoleDebugger(PrintStream output) {
    cd_ps_out = output;
    }
    
    void gc() throws Exception {
    memInfo();
    long t1 = System.currentTimeMillis();
    System.gc();
    long d = System.currentTimeMillis() - t1;
    cd_ps_out.println("System.gc(): "+d+" ms");
    memInfo();
    cd_ps_out.flush();
    }
    
    void memInfo() throws Exception {
    Runtime r = Runtime.getRuntime();
    long f = r.freeMemory();
    long t = r.totalMemory();
    cd_ps_out.println("USED=" + (t - f)/1000 + "k, FREE=" + (f/1000) + "k, (TOTAL=" + (t/1000) + "k)");
    cd_ps_out.flush();
    }
    
    public static void main(String args[]) throws Exception {
    if(args.length<1) {
    System.out.println("Arguments:");
    System.out.println(" [-is <port>] [classname [std arguments]]");
    System.out.println("where:");
    System.out.println(" port tcp port to start input server on");
    System.out.println(" classname classname on which the main(String[]) method will be invoked");
    System.out.println();
    }
    
    String classname = null;
    String[] arguments = null;
    int isport = 0;
    
    int i = 0;
    while(i<args.length) {
    if(args[i].equals("-is") && args.length >= (i+1)) {
    isport = Integer.parseInt(args[i + 1]);
    i += 2;
    } else {
    classname = args[i];
    arguments = new String[args.length - i - 1];
    for(int j = 0; j < arguments.length; j++) {
    arguments[j] = args[i + j + 1];
    }
    break;
    }
    }
    
    if(classname!=null) {
    if(isport>0)
    ExtraSimpleConsoleDebugger.startInputServer(true, isport);
    invokeMain(classname, arguments);
    } else if(isport>0) {
    System.out.println("---TEST MODE---");
    ExtraSimpleConsoleDebugger.startInputServer(false, isport);
    }
    
    }
    
    public static void startInputServer(boolean daemon, int port) {
    CommandInputServer cis = new CommandInputServer(port);
    cis.setDaemon(daemon);
    cis.start();
    }
    
    static void invokeMain(String className, String[] sa) throws Exception {
    if(sa == null)
    throw new IllegalArgumentException("String[] cannot be null");
    
    Class c = Class.forName(className);
    Class saClass = (new String[0]).getClass();
    Class[] ca = new Class[]{saClass};
    Method m = c.getMethod("main", ca);
    m.invoke(null, new Object[]{sa});
    }
    
    //============================================
    // INNER CLASSES
    //============================================
    
    static class CommandInputServer extends Thread {
    private int cnt = 0;
    int port;
    ServerSocket ss;
    
    CommandInputServer(int port) {
    super("CD-InputServer:" + port);
    this.port = port;
    }
    
    public void run() {
    try {
    ss = new ServerSocket(port);
    while(true) {
    Socket s = ss.accept();
    InputSession is = new InputSession(this, cnt++, s);
    is.start();
    }
    } catch(Exception e) {
    e.printStackTrace();
    } finally {
    try {
    ss.close();
    } catch(Exception e) {
    }
    }
    }
    }
    
    static class InputSession extends Thread {
    CommandInputServer cis;
    Socket socket;
    int sessionNumber;
    
    InputSession(CommandInputServer cis, int sn, Socket s) {
    super("CD-InputSession[" + sn + "]:" + cis.port);
    this.cis = cis;
    this.sessionNumber = sn;
    this.socket = s;
    }
    
    void help(PrintStream ps) {
    ps.println();
    ps.println("gc : run System.gc()");
    ps.println("m : show memory info");
    ps.println("endserver : ends the Session creator server (on accept port)");
    ps.println("q : quit this session");
    }
    
    public void run() {
    try {
    BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
    PrintStream ps = new PrintStream(socket.getOutputStream(), true);
    ps.println();
    help(ps);
    ps.print(getName() + ">");
    ps.flush();
    
    ExtraSimpleConsoleDebugger cd = new ExtraSimpleConsoleDebugger(ps);
    
    for(String line = br.readLine(); line != null; line = br.readLine()) {
    String trimmed = line.trim().toLowerCase();
    ps.println(trimmed);
    
    if(trimmed.equals("?")) {
    help(ps);
    } else if(trimmed.equals("gc")) {
    cd.gc();
    } else if(trimmed.equals("m")) {
    cd.memInfo();
    } else if(trimmed.equals("endserver")) {
    cis.interrupt();
    cis.ss.close();
    } else if(trimmed.equals("q")) {
    break;
    } else if(trimmed.length()>0){
    ps.println("Unknown cmd: "+trimmed);
    }
    
    ps.print(getName() + ">");
    ps.flush();
    }
    
    br.close();
    ps.close();
    socket.close();
    } catch(Exception e) {
    e.printStackTrace();
    }
    }
    }
    }
- 9
  - J2ME - loading big JPG files
    "ab" <email***@***.com> wrote in message news:fppem0$u4c$email***@***.com...
    >
    >
    > Hi,
    > can anybody know how can I load and display large JPG files in J2ME?
    >
    > best regards ab
    
    problem is with that is the memory capacity is quite low - so big jpgs with
    throw errors - depends on how advanced the hardware is
- 10
  - @see tag"Adone Borione" <email***@***.com> writes:
    
    > /**
    > * @see java.lang.String
    > */
    
    You need to tell JavaDoc where the standard API docs are: By default,
    JavaDoc doesn't include references to system classes because it
    doesn't know where you may want to reference it.
- 11
  - Question about JInternalFrame and MouseMotionListenerHi,
    
    I've got a JInternalFrame containing several swing components : 2
    JTabbedPane, a JToolBar and a panel with a ButtonGroup.
    
    I've added a MouseMotionListener to the JInternalFrame.
    The mouse moved is not detected when the mouse cursor stay inside one
    of the component (for example in the JTabbedPane).
    How can I make it work ? Is there another solution than to add a
    MouseMotionListener to each component of the JInternalFrame ?
    Thanks
    Annie
- 12
  - Your 2 cents: Java Generics, love it, hate it, or waiting?email***@***.com opalinski from opalpaweb <email***@***.com> wrote:
    > I was of something else: If you have sources that were written before
    > 5.0 you can write new classes which use generics and have data flow
    > between instances of previously written classes and generics using
    > classes.
    
    It would, of course, be possible to do this without type erasure as
    well, in exactly that set of circumstances where it's safe, by giving an
    appropriate definition of raw types. When it's not safe, you could
    provide trivial wrappers (much like the current Collections.checkedList,
    except without its stupid Class<E> parameter; see earlier post) that
    would fit the necessary API and cast at run-time. The result would be
    better than what we have now.
    
    > If you have classes B,C,D which use class A internally, where class A
    > is a container. You then modify A to be a generic, paramterizable on
    > Classes. The change to A does not break B,C,D. B,C,D can stay excalty
    > as they were even though the container they use internally has changed
    > to be a generic.
    
    Assuming the result only has to run on Java 1.5, this doesn't require
    type erasure. And since Java 1.5 produces a new class file version
    number, even the current implementation doesn't save you from that,
    anyway.
    
    So you just define the raw type, as used in the old source and binary
    code, as being equivalent to what we now call the type erasure of the
    type, and voila! Everything works.
    
    --
    www.designacourse.com
    The Easiest Way To Train Anyone... Anywhere.
    
    Chris Smith - Lead Software Developer/Technical Trainer
    MindIQ Corporation
- 13
  - Deploying java web services on TOMCATHi
    
    I have build a web service using the tutorial given on sun's site
    (http://docs.sun.com/source/817-2151-10/wsgjaxrpc.html). Web service is
    deployed on J2EE application server and every thing is working fine.
    Now i want to deploy the same web service on TOMCAT. First of all i
    would like to explore about the possibility of doing the same. Is it
    possible to deploy web service on java without using Soap admin tool
    and AXIS.
    
    Regards
    Rohit
- 14
  - Consuming Web Services inside J2EE/ JbossHi,
    
    I have search the web , and by know I hava an good ideia on how to publish may Stateless EJB has a
    webservice (using JBoss 3.2.x). My problem is now consume web services inside a Stateless EJB (or
    any other , for that matter). I've searched, but with no luck. Having a WSDL file for a web service
    how do I comsume it inside my beans ? (i.e. use the web service as an extension of my server
    funcionality) How to I access that service from inside EJB using JBoss?
    Any ideias ?
- 15
  - hsqldb or/vs mckoiIs there a comparison of the two databases somewhere?
    
    Bob