java-programmer >>URL.openConnection bug in 1.6??

URL.openConnection bug in 1.6??

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- 1
  - Hibernate, connection pool and firewall questionAn odd combination of topics, to be sure.
    
    My current web application (Tomcat hosted) has a custom-rolled
    connection pool. The Informix DB I connect to is across a firewall
    that terminates existing connections after 120 minutes, regardless of
    their current activity. My pool handles this by detecting the
    creation date of a connection it wants to reuse. If that connection
    was created > 60 minutes ago it closes the connection and fetches a
    replacement to use in the pool.
    
    Simply using a connection until the 120 minute barrier is reached
    isn't acceptable because the DB isn't smart enough to realize that the
    firewall has stopped the connection's use. The explicit release after
    60+ minutes releases the connection and keeps the simultaneous
    connection use down (we are licensed by the number of simultaneous
    connections).
    
    When I look at Hibernate and its connection pools (DBCP and C3P0,
    there might be others) I'd like to use their stuff instead of my
    home-grown pool. But I don't really see a parameter like "only use
    this connection for 60 minutes" or such. Can I find such a parameter
    in one of the pool possibilities?
    
    TIA,
    Jerome.
- 2
  - Applet as DSO in Browser example? MSIE only?Hi,
    
    Recently on the web I came across documentation discussing Data Source
    Objects (DSO) in relation to browser and html functionality (in particular
    the ability to declare a Java applet as a data source that can be used with
    any or the HTML tags that take the src="" attribute). I find it interesting
    and potentially *very* useful and would like to know more, so if anyone can
    answer any of the following questions that would be great: -
    
    1) Do you have an example of an Applet functioning as an applet to something
    like a <Table> that I can see?
    
    2) Is this a MicrosoftIE-only feature? I can't find it in other html tag
    reference sites. (I'm using w3schools as a sort of yardstick; is that less
    than optimal?) What do other browsers do? Is Microsoft deprecating this
    along with other Java stuff?
    
    3) I've searched in c.l.j.p/c.l.javascript and the only references to DSOs
    appear to be server based (or data sources other than Applet) I'm guessing
    they're entirely different beasts; is that correct?
    
    4) Anyone ever passed a BufferedImage over to Javascript for display on a
    web page? (I know it'd be single threaded and all those little .GIFs and
    .JPEGs are designed for parallel http webservers, but think of a blob in a
    database that has an employee photo of geological survey or something. . .)
    
    Thanks for any help!
    
    Regards Richard Maher
    
    PS. I am already passing result set <options>s back to a <select> list quite
    happily; it's the tighter integration between the html tags and my socket
    that I'm striving for here.
    
    One of the places I've been looking: -
    http://msdn.microsoft.com/library/default.asp?url=/workshop/author/databind/datasources.asp
- 5
  - Ethernet ID and system Info in JavaHi,
    
    I want to know if there is a way to get system level information using Java.
    I am mostly interested in things like Ethernet ID and serial number of Hard
    disk. Some of the values when you type "ipconfig /all" on windows.
    
    I know we can do all this using JNI with the main routines written in C. But
    is there a way to do it using Java alone?. I have not seen any API to help
    me get such deep system level information.
    
    Thanking you,
- 7
  - Axis e Web ServiceSalve,
    sto realizzando un applicazione Java che utilizza un Web Service con
    Eclipse 3.2.
    Questo Web Service ha il compito di salvare un oggetto su database
    MySQL facendo uso delle librerie di Hibernate 3.1.3.
    L'applicazione gira su un server Tomcat 5.5 che fa uso delle librerie
    j2sdk1.4.2_10 e utilizza librerie di Axis 1.4 per i Web Service.
    L'applicazione ?in realt?costituita da un applicazione client che
    richiama il Web Service ed un applicazione server che si preoccupa di
    salvare gli oggetti sul database. Eseguendo il client ottengo il
    seguente errore:
    
    AxisFault
    faultCode:
    {http://schemas.xmlsoap.org/soap/envelope/}Server.userException
    faultSubcode:
    faultString: java.lang.reflect.InvocationTargetException
    faultActor:
    faultNode:
    faultDetail:
    {http://xml.apache.org/axis/}hostname:notebook-pc
    
    java.lang.reflect.InvocationTargetException
    at
    org.apache.axis.message.SOAPFaultBuilder.createFault(SOAPFaultBuilder.java:222)
    at
    org.apache.axis.message.SOAPFaultBuilder.endElement(SOAPFaultBuilder.java:129)
    at
    org.apache.axis.encoding.DeserializationContext.endElement(DeserializationContext.java:1087)
    at org.apache.crimson.parser.Parser2.maybeElement(Parser2.java:1712)
    at org.apache.crimson.parser.Parser2.content(Parser2.java:1963)
    at org.apache.crimson.parser.Parser2.maybeElement(Parser2.java:1691)
    at org.apache.crimson.parser.Parser2.content(Parser2.java:1963)
    at org.apache.crimson.parser.Parser2.maybeElement(Parser2.java:1691)
    at org.apache.crimson.parser.Parser2.parseInternal(Parser2.java:667)
    at org.apache.crimson.parser.Parser2.parse(Parser2.java:337)
    at
    org.apache.crimson.parser.XMLReaderImpl.parse(XMLReaderImpl.java:448)
    at javax.xml.parsers.SAXParser.parse(SAXParser.java:345)
    at
    org.apache.axis.encoding.DeserializationContext.parse(DeserializationContext.java:227)
    at org.apache.axis.SOAPPart.getAsSOAPEnvelope(SOAPPart.java:696)
    at org.apache.axis.Message.getSOAPEnvelope(Message.java:435)
    at
    org.apache.axis.handlers.soap.MustUnderstandChecker.invoke(MustUnderstandChecker.java:62)
    at org.apache.axis.client.AxisClient.invoke(AxisClient.java:206)
    at org.apache.axis.client.Call.invokeEngine(Call.java:2784)
    at org.apache.axis.client.Call.invoke(Call.java:2767)
    at org.apache.axis.client.Call.invoke(Call.java:2443)
    at org.apache.axis.client.Call.invoke(Call.java:2366)
    at org.apache.axis.client.Call.invoke(Call.java:1812)
    at source.Start.main(Start.java:42)
    
    In particolare ho notato che questo si verifica nel momento in cui si
    invoca un metodo chiamato "save" messo a disposizione da Hibernate. Se
    commetto la riga corrispondente a tale istruzione, richiedendo al web
    service di restituire semplicemente una stringa, l'applicazione
    funziona correttamente. Suppongo che il problema derivi dal database
    MySQL, ma non capisco di cosa si tratta. Avete qualche idea?
- 8
  - Getting ready for 1.5I'd like to prepare for JDK 1.5. I know that generics/templates
    will be in there. Will standard Java classes be retofitted to
    use this new feature as appropriate? I'm thinking of course
    about the collections, but also wondering about stuff such as
    the clone interface.
    
    I also know that enums will be in there. (Because the bug status
    changed to closed/fixed.) But in what form? There were at least
    two JSRs for that last time I checked.
    
    Thanks!
    
    -Wayne
- 12
  - Licence code storing for java appHello,
    
    I want to create a app which will have something similar to licence
    (i.e. user have to enter licence code to run the app). The problem
    arises when I want to make it that user have to specify it only once.
    So I need to store somewhere the information, that the app has already
    been activated. I am thinking about main jar file (as something which
    can work ,although it is nothing sophisticated), but when I add extra
    characters at the end then my jar was corrupted :(. Do you know any
    nice way to do this:)? Thank you!
    
    Regards, mark
- 12
  - Python and cellular automata (It works this time!)I thought people would be interested in this little script I wrote to
    reproduce the 256 simple automata that is shown in the first chapters
    of "A New Kind of Science". You can see a few results without running
    the script, at http://cooper-j.blogspot.com . And here is the code (You
    will need PIL (Python Imaging Library)):
    <code>
    import Image
    
    # Contract:
    # To simulate simple cellular automata.
    
    class calculations:
    def __init__(self,which):
    self.against = self.array_maker_2()[which]
    self.check = self.array_maker_1()
    self.array = self.array_maker_3(311)
    self.calculator()
    
    def binary(self, n, size): ## This is the Int -> str(BINARY)
    converter
    assert n >= 0
    bits = []
    while n:
    bits.append('01'[n&1])
    n >>= 1
    bits.reverse()
    result = ''.join(bits) or '0'
    for iteration in range(len(result),size):
    result = "0" + result
    return result
    
    def array_maker_1(self): # This makes the array that represents the
    8 different permutations of 3 cells. Itself, its left and its right.
    return [self.binary(n, 3) for n in range(8)]
    
    def array_maker_2(self): # This makes the array that represents
    every single different rule. If for instance the second element in one
    # of these rules is 1, then the corresponding permutation that may
    be found in the result array (array_maker_3), will be 1 (black).
    return [self.binary(n, 8) for n in range(256)]
    
    def array_maker_3(self, y): # This is the array for all the
    results. The automaton starts from the middle of the first row
    x = [["0" for x in range((2*y)+1)] for n in range(y)]
    x[0][(2*y+1)/2] = "1"
    return x
    
    def calculator(self): # This cycles over all of the cells, and
    scans one row at a time, and changes the next row according to the
    current cell.
    self.buff_result = ["0","0","0"] # This is the current permutation
    buffer to be checked against the corresponding arrays.
    for i in range(len(self.array)-1):
    for j in range(1, len(self.array[0])-1):
    self.step1(j,i)
    self.step2(j,i)
    self.step3(j,i)
    y = self.check.index(''.join(self.buff_result))
    self.array[i+1][j] = self.against[y]
    
    # The steps update the result buffer.
    def step1(self, step, y):
    self.buff_result[0] = self.array[y][step-1]
    
    def step2(self, step, y):
    self.buff_result[1] = self.array[y][step]
    
    def step3(self, step, y):
    self.buff_result[2] = self.array[y][step+1]
    
    for number in range(256):
    objo = calculations(number)
    x = objo.array
    y = []
    for num,zo in enumerate(x):
    for com,wo in enumerate(zo):
    x[num][com] = int(wo)
    
    nim = Image.new("1", (623,311))
    
    for n in x: #converting the array of arrays into a single array so
    putdata can take it.
    for p in n:
    y.append(p)
    nim.putdata(y)
    nim.resize((6230/2,3110/2)).save("output" + str(number) + ".png")
    print number
    </code>
- 12
  - RSA encrypt session keyDoes anyone know how to encrypt a secret key with a public key algorithm
    to transmit it to another computer securely. Have tried using RSA and
    have had no look in the following code:
    
    public byte[] encryptSessionKey(SecretKey sKey, PrivateKey pKey, String
    algorithm)
    {
    System.out.println("linex");
    Cipher cipher = Cipher.getInstance(algorithm+"/ECB/PKCS#1");
    System.out.println("liney");
    cipher.init(Cipher.WRAP_MODE, pKey);
    System.out.println("linez");
    return cipher.wrap(sKey);
    }
    
    It prints out liney but not linez which suggests the Cipher object can
    not encrypt a session key in wrap mode.
    
    Thanks.
- 12
  - Java application help?????????????How do you create a pause in a Java application that requires you to
    press a key to continue until the conditional statement is complete?
    The folowing is what I have so far..
    
    class Count{
    public static void main(String[] arguments) throws Exception {
    
    int a = 100;
    int b = 20;
    int x;
    
    for (x = 0;x < a;x++) {
    
    System.out.println((x+1) + "." + "Message goes here to be displayed
    100 times.");
    
    }
    
    I would like the application to display 1 - 20 then pause and display
    20 more and 20 more and so on. I tried to use System.in.read();, but
    it only displayed two at a time. Please Help.
- 12
  - TRYING TO CREATE A SIMPLE FORM. HELP HELP HELP!!!!trying to make a simple form, just an empty window with no button.
    
    ive tried this
    
    import javax.swing.*;
    import java.awt.*;
    import java.util.List;
    import java.util.*;
    
    public class Canvas
    {
    
    private static Canvas canvasSingleton;
    
    public static Canvas getCanvas()
    {
    if(canvasSingleton == null) {
    canvasSingleton = new Canvas("BlueJ Shapes Demo", 300, 300,
    Color.white);
    }
    canvasSingleton.setVisible(true);
    return canvasSingleton;
    }
    
    }
    
    but it doesnt work :( any ideas guys?
- 12
  - jigsaw's jdbmI like that I can use the jigsaw outside if jdbm. For
    writing j2me (personal java) that don't have any sort
    of record manager on the device I want to also use
    jdbm there. However jdbm requires some of the file
    classes that are not universally available within
    j2me. I don't have the error posting just now (stupid
    me) from javac to show what's missing. Has anyone
    worked through this or have another idea for an
    embedded data (flatfile) manager for j2me?
    
    Mike
- 13
  - Read the index of item with X value.On Mar 26, 10:42 pm, "Mariano" <email***@***.com> wrote:
    > I've a ComboBox ..
    
    >From where? There is no ComboBox in the JSE.
    Are you perhaps referring to java.awt.Choice,
    or javax.swing.JComboBox?
    ..
    > How could I resolve?
    
    1) Be specific about the classes used, rather
    than simply 'making the names up, as you go along'
    2) ..
    
    Andrew T.
- 14
  - generate doc/lit web services from java interfaceHi there,
    
    I have a java interface and would like to generate a "doc/lit"
    web service out of it.
    Can someone point out to good tutorial on how to do this.
    Thanks
- 15
  - JVM sourcesHi,
    
    Where can I find C sources for JVM 1.4 for Windows ?
    
    Thanks
    
    Xavier
- 15
  - Faster JPEG Decoder?On 19 Aug 2005 16:14:17 -0700, email***@***.com wrote or quoted :
    
    >Currently we use JPEGImageDecoder which is the fastest of the three but
    >still it takes up a lot of CPU time.
    >
    >Any suggestion? Thanks in advanced.
    
    The obvious thing to consider is to predigest your images into some
    other format that does not require so much processing to fluff it up.
    They will probably be bigger.
    
    When you create the jpg images you can control the
    compression/quality. Presumably lower quality images will display
    faster.
    
    If you are displaying them or scrolling over them, then you might look
    into what speedups are possible with VolatileImage.
    --
    Canadian Mind Products, Roedy Green.
    http://mindprod.com Again taking new Java programming contracts.

Author

Message

Roedy Green

Posted: 2006-1-26 12:15:00

Top

java-programmer, URL.openConnection bug in 1.6?? If a bug report I got is correct, under some conditions JDK 1.6
URL.openConnection returns null without throwing an IOException.
--
Canadian Mind Products, Roedy Green.
http://mindprod.com Java custom programming, consulting and coaching.

Sanjay

Posted: 2006-1-27 14:27:00

Top

java-programmer >> URL.openConnection bug in 1.6?? Is it only in 1.6 or is it present in 1.5 or earlier.

Roedy Green

Posted: 2006-1-27 14:40:00

Top

java-programmer >> URL.openConnection bug in 1.6?? On 26 Jan 2006 22:27:08 -0800, "Sanjay" <email***@***.com>
wrote, quoted or indirectly quoted someone who said :

>Is it only in 1.6 or is it present in 1.5 or earlier.

Mickey Segal is having it. I have not yet figured out how to get
browsers to use 1.6 to see if I can reproduce it.
He says it is fine in 1.5 and fails in two different browsers in 1.6.

I have not yet got to watch a failure personally.
--
Canadian Mind Products, Roedy Green.
http://mindprod.com Java custom programming, consulting and coaching.

Mickey Segal

Posted: 2006-1-27 22:08:00

Top

java-programmer >> URL.openConnection bug in 1.6?? "Roedy Green" <email***@***.com> wrote in
message news:email***@***.com...
> I have not yet figured out how to get
> browsers to use 1.6 to see if I can reproduce it.

From http://download.java.net/jdk6/binaries/ you can download the latest JDK
6.0 Binary Snapshot Release. They are dated Thursdays but seem to appear
sometime during the day on Fridays. I haven't fiddled to see how to use the
Windows self-extracting JRE Jar file so I just install the Windows Offline
Installation, Multi-language JDK file.

If you are filing bugs on the Sun JRE it makes most sense to file them on
the latest 1.6 version. It makes sense to file bugs on new problems in 1.6
so as to stop them before they reach your customers.

Index ‹ java-programmer

Next
- 1
  - JDK 1.1.8 V1999-11-9 on recent FBSD 4Hi all,
    
    I tried to run JDK 1.1.8 V1999-11-9 (ELF version) on my FreeBSD
    4.8-STABLE box. It could not run and I had the following message:
    
    % java Linpack
    /usr/libexec/ld-elf.so.1: /usr/lib/libm.so.2: Undefined symbol "__stderrp"
    % java -version
    /usr/libexec/ld-elf.so.1: /usr/lib/libm.so.2: Undefined symbol "__stderrp"
    % java
    /usr/libexec/ld-elf.so.1: /usr/lib/libm.so.2: Undefined symbol "__stderrp"
    % jar
    /usr/libexec/ld-elf.so.1: /usr/lib/libm.so.2: Undefined symbol "__stderrp"
    % java_g
    /usr/libexec/ld-elf.so.1: /usr/lib/libm.so.2: Undefined symbol "__stderrp"
    
    Can the JDK 1.1.8 work on recent FBSD 4 and 5?
    How can I avoid this problem?
    
    Kazuyuki Shudo email***@***.com http://www.shudo.net/
    _______________________________________________
    email***@***.com mailing list
    http://lists.freebsd.org/mailman/listinfo/freebsd-java
    To unsubscribe, send any mail to "email***@***.com"
- 2
  - i18n currencyhi all,
    i need to internationalize the currency symbol in my application.
    please advice on how that can be done
    
    thanks
    
    Chanchal
- 3
  - bsd implementation ofOn Thu, Jan 17, 2008 at 08:13:00PM -0800, Michael Allman wrote:
    > There's a bug in the bsd patch to FileChannelImpl.c, as described in the
    > subject of this message. FYI, I have verified this using the "current"
    > jdk16 freebsd patchset found here:
    >
    > http://www.eyesbeyond.com/freebsddom/java/JDK16JRLConfirm.html
    
    D'oh...there certainly is.
    
    > I haven't fully analyzed the impact of this defect. I can say that in my
    > case, if I call FileChannel.transferTo(0, 100, socketChannel), where 100
    > is less than the length of the file in question, it transfers the entire
    > file to the destination. According to the docs for this method, it should
    > only transfer a maximum of 100 bytes. This is key to my particular usage
    > of this method.
    
    The problem is that it ignores the count entirely and just transfers the
    whole thing.
    
    > I can attempt to provide a patch, but C is not my thing, and I could not
    > make a reliable claim as to the correctness of my patch. Also, there's
    > the whole license issue. Fixing this seems simple enough, though. I
    > would like to help insofar as I can.
    
    Something like this maybe? (Untested)
    
    --- ../../j2se/src/solaris/native/sun/nio/ch/FileChannelImpl.c 6 Mar 2007 17:45:05 -0000 1.11
    +++ ../../j2se/src/solaris/native/sun/nio/ch/FileChannelImpl.c 18 Jan 2008 08:11:36 -0000
    @@ -264,11 +264,12 @@
    return IOS_THROWN;
    }
    
    - while ((r = pread(srcFD, buf, 4096, offset)) > 0) {
    + while (count > 0 && (r = pread(srcFD, buf, (count < 4096) ? count : 4096, offset)) > 0) {
    w = write(dstFD, buf, r);
    if (w == -1)
    break;
    offset += w;
    + count -= w;
    }
    free(buf);
    
    > Also, I know this is getting pushy, but it seems like fixing this issue
    > would be a great time to replace the current implementation of this method
    > with a true bsd sendfile() call. I could give that a try, too.
    
    As noted in the comments, you can't since the BSD implementation of
    sendfile(2) expects to be sending the file to a socket, not just any old
    file descriptor. Solaris and Linux are both ok with any old fd.
    
    --
    Greg Lewis Email : email***@***.com
    Eyes Beyond Web : http://www.eyesbeyond.com
    Information Technology FreeBSD : email***@***.com
    _______________________________________________
    email***@***.com mailing list
    http://lists.freebsd.org/mailman/listinfo/freebsd-java
    To unsubscribe, send any mail to "email***@***.com"
- 4
  - Thread for ProgressBarHi all,
    
    I have a question on threading for the progressbar.
    
    My program will call a few methods and those methods are really time
    consuming, the time it takes all depends on how much information are
    being pump in, sometimes it can be less than half a minute, sometimes
    it can go up to few minutes. So determining the percentage of the
    progressbar is impossible.
    
    So how do I find out the total length of the process so that I can
    update the progressbar's percentage accordingly?
- 5
  - How to solve with aid of Multithreading.. Hi,
    
    Please, could you any one give me the solution for following
    problem..
    
    A Dialog box (JDialog) getting input parameters from user..
    itself a button attached.. if i click the run
    button those parameters are passing to 'C' core which connected by
    JNI.. core executing few minutes..
    and returning to java.. mean while the dialog box (after
    setVisible(false) instuction)
    appearing as plain brown box till control return from 'C'..
    
    how can i apply multithreading feature of java's here inorder to
    get..
    
    Dialog box should get disappear as soon as button has clicked.
    and Percentage of completion should display as in progress bar..
    while 'C' running on background..
    
    (or)
    
    Dialog box should get Disappear as soon as button has clicked.
    and some processing animation should display till 'C' running on
    background...
- 6
  - Custom eventHello All,
    
    How can I write a custom event?
    I want to create a custom event object and fire it at a particular point in
    program.
    
    Thanks in advance!
    
    Regards
    Suma
- 7
  - Servlet LDAP Web Server AuthenticationThis may not be the correct place to post this; however, please bear
    with me.
    
    Platform: Solaris 9
    iPlanet Web Server
    Java Servlets/JSP website
    
    I have a servlet that displays the contents of a directory as links
    available for downloading/viewing. I have also locked this directory
    down using LDAP through the web administration page of iPlanet. What
    I would like to happen is to authenticate to the web server first,
    before the links are displayed, so that when the user clicks on the
    links, they are not prompted with the typical gray box asking for a
    username and password. I've researched and implemented JNDI,
    authenticated to LDAP, tailed the logs, and I authenticate fine. My
    servlet loads, and the first thing it does is query ldap and
    authenticate. Next it prints out the page containing the links.
    (I've even tried not closing the context) But as soon as I click on
    the links, I am prompted again. I am assuming (and very fuzzy on how
    this works) that yes, I authenticated to LDAP. But the webserver
    doesn't know that. So how do I get the webserver to realize that I've
    already authenticated? Any help would be appreciated.
    
    Thanks,
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- 8
  - JDBCAdapter & close() method ?Do you know JDBCAdapter from j2sdk TableExample:
    JDBCAdapter extends AbstractTableModel {
    
    ....
    
    public void close() throws SQLException {
    System.out.println("Closing db connection");
    
    resultSet.close();
    statement.close();
    connection.close();
    }
    ...
    
    }
    
    Who start the close() method on exit of my application???
    
    ---
    Outgoing mail is certified Virus Free.
    Checked by AVG anti-virus system (http://www.grisoft.com).
    Version: 6.0.725 / Virus Database: 480 - Release Date: 19.7.2004
- 9
  - [JavaIDL] Releasing CORBA object references in Java ?<previously posted on comp.object.corba, with no response yet>
    
    Hi all,
    
    I really wonder what's the use of org.omg.CORBA.Object._release() and
    _duplicate().
    
    I was thinking that reference counting was the job of GC.
    
    In C++ the reference counting, via the usage or _var and _ptr and methods
    release() and duplicate(), is without ambiguity (even if complex and error
    prone). But here in Java, the introduction of _release() and _duplicate() is
    very strange.
    
    Another point for the discussion: as I am using the JDK ORB implementation,
    the Java Doc says:
    
    "
    - Object _duplicate()
    
    Returns a duplicate of this CORBA object reference. The server object
    implementation is not involved in creating the duplicate, and the
    implementation cannot distinguish whether the original object reference or a
    duplicate was used to make a request.
    
    Note that this method is not very useful in the Java platform, since
    memory management is handled by the VM. It is included for compliance with
    the CORBA APIs.
    
    The method _duplicate may return this object reference itself.
    
    - void _release()
    
    Signals that the caller is done using this object reference, so internal
    ORB resources associated with this object reference can be released. Note
    that the object implementation is not involved in this operation, and other
    references to the same object are not affected.
    "
    
    My opinion here is that releasing references or not won't make any
    difference, and duplicating them is pointless.
    
    But what does the standard says ?
    
    Thanks in advance,
    
    JC.
- 10
  - Analytical or IntuitiveI have a test online that measures cognitive style. It determines
    whether the participant has an intuitive or analytical learning style.
    It takes about 5 minutes.
    
    It's here: http://www.elena.com
    
    I'm a long-time software engineer who's thinking about changing
    careers, hence the psychology course. I ended up wanting to study
    people like me (not surprising I guess).
    
    I know the sample will be non-probabilistic. So this will be a
    quasi-experiment.
    
    Elena
- 11
  - Detecting KeyBoard events on a JDialogHello,
    
    i have a JDialog subclass, with a lot of components in it, and i would
    like to detect Ctrl+C on it. I've tried to use this:
    
    protected void register(JComponent jcomp) {
    Action action = new AbstractAction("Action") {
    public void actionPerformed(ActionEvent evt) {
    System.err.println("Action!!!");
    }
    };
    
    KeyStroke key = KeyStroke.getKeyStroke(KeyEvent.VK_C,
    KeyEvent.CTRL_DOWN_MASK);
    
    jcomp.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(key, "myaction");
    jcomp.getInputMap(JComponent.WHEN_FOCUSED).put(key, "myaction");
    jcomp.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT).put(key,
    "myaction");
    
    jcomp.getActionMap().put("myaction", action);
    }
    
    wich is call like that:
    
    register((JComponent)getContentPane());
    register((JComponent)getGlassPane());
    register(getRootPane());
    
    but my action is never performed.
    
    So i've registered a KeyListener recursively on my dialog, and the
    keylistener is called with getSource() returning the dialog ref. But the
    dialog has no inputMap so how can i do?
    
    I can't use the recursive trick because there are 2 JTables in the
    Dialog which must keep its default copy behavior, and a lot of text
    fields too.
    
    Thanks for any help.
- 12
  - jbutton/jlabel disspearing textHi,
    
    I have created a few JButtons/JLabels but the text on them seems to
    disappear depending on the platform the gui is run on (The disappearing text
    appears as "..."). How is it possible to set the size of the label/button
    according to the length of the text?
    
    Thanks,
    
    Adrien
- 13
  - help with saving a JPanel to jpgI have a JPanel that I paint with a graph. The upper 40% is a graph
    with a grid background, and the rest is a legend for the graph. When I
    try to save the JPanel as a jpg, I get an image with the same
    dimensions but there is no graph or legend and the grid, which uses the
    dimensions to set the upper grid limit, covers the entire panel.
    Everything on screen is fine. The current code is below. I've tried
    the available varieties of paint and tried using the Robot class
    (though this could be explored more). Any tips on where I'm messing up
    or what could be changed to get this working would be appreciated.
    
    java.awt.image.BufferedImage image = new java.awt.image.BufferedImage(
    panel.getPreferredSize().width,
    panel.getPreferredSize().height,
    java.awt.image.BufferedImage.TYPE_INT_RGB);
    java.awt.Graphics2D g = image.createGraphics();
    g.setRenderingHint(java.awt.RenderingHints.KEY_FRACTIONALMETRICS,
    java.awt.RenderingHints.VALUE_FRACTIONALMETRICS_ON);
    g.setRenderingHint(java.awt.RenderingHints.KEY_TEXT_ANTIALIASING,
    java.awt.RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
    panel.paintAll(g);
    g.dispose();
    javax.imageio.ImageIO.write(image, "jpeg",
    new java.io.File("./" + jtf.getText() + ".jpg"));
    image.flush();
- 14
  - java.netHello
    
    How can I get the ip and mac address of the networking device
    (eth0)?? is it possible with the InetAddress??
    
    I want to get the ip address given by the ISP.
    
    Sincerly
    DigitaluX
- 15
  - how to read multiple (binary) lines from text file / stdin?
    hi group!
    
    i am writing a small tool to dump data from oracle databases and i want
    to implement the possibility to execute sql statements read from stdin
    or from a file. i have so far managed to do so, but every sql statement
    must be on a single line with no ";" at the end of each line.
    
    i would like to use an input file like this:
    
    -- file statement.sql --
    select * from table
    where thing = "something";
    ------------------------
    
    or
    
    -- file statement.sql --
    update table
    set image = '<binary data>'
    where thing = otherthing;
    ------------------------
    
    this is how the code looks so far:
    
    // code start
    
    BufferedReader in = new BufferedReader(new FileReader(filename));
    
    while (((statement=in.readLine())!= null) &&(!statement.equals(""))){
    try {
    ResultSet rset = stmt.executeQuery(statement);
    [...]
    }
    }
    
    // code end
    
    i would like 'statement' to contain the multiline sql statement
    including all newlines so that also binary data may be inserted into the
    db so i tried to use
    
    System.setProperty("line.separator", ";");
    
    but that didn't help and also doesn't seem the right way for what i want
    to achieve. could someone please point me into the right direction on
    how to do that? the variety of different stream classes is somewhat
    confusing in terms of finding the right class for the right job.
    
    big TIA, armin
    
    --
    armin walland
    
    focusmr.com
    maculangasse 8
    1220 wien