java-programmer >>To really foul things up requires a computer

To really foul things up requires a computer

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- 1
  - getting Error: could not find libjava.so Re: building a jdk1.5
    On Mar 3, 2007, at 5:18 PM, Bill Moran wrote:
    
    >
    >> On Mar 3, 2007, at 4:01 PM, Chad Leigh -- Shire.Net LLC wrote:
    >>
    >>> Hi
    >>>
    >>> I am trying to build jdk15 inside my jail with PREFIX set to /usr/
    >>> public (At one time I successfully got jdk 1.4 to build after much
    >>> hacking)
    >>>
    >>> I have the option for builing inside a jail set. We get to the
    >>> point where the linux java is installed and it is actually building
    >>> the jdk
    >>>
    >>> # Start of jdk build
    >>> /libexec/ld-elf.so.1: /usr/local/lib/libiconv.so.3: Undefined
    >>> symbol "__mb_cur_max"
    >>> *** Error code 1
    >>>
    >>> Stop in /usr/ports/java/jdk15.
    >>> #
    >>>
    >>> I am not exactly sure what it is doing at this point in order to
    >>> hack round it. libiconv a fresh install from ports
    >>>
    >>
    >> Turns out that the issue is that gmake cannot run. I have not
    >> figured out why yet, having removed and reinstalled libiconv and
    >> gmake and getting the same error. But it is not java related.
    >>
    >> I'll redirect this to -questions
    >>
    >> If anyone has an idea on why gmake would fail as above on a fresh
    >> install, 6.2-RELEASE from a day or two ago, I would appreciate it.
    >> Please CC me as I am not currently subscribed to -questions, though I
    >> am on -java
    >
    > Not a direct answer to your question, but when I needed to do this
    > a few months ago, I just did a "make package" on my workstation, then
    > shipped the package up to the jail system and installed it with
    > pkg_add.
    >
    > Doesn't solve the problem, but if you're in a pinch, it's a handy
    > workaround.
    >
    
    OK, I had never done this before -- built a package from a port. So
    I did this on the base machine and then copied it into the jail and
    did a pkg_add like so
    
    # pkg_add -P /usr/public -v jdk-1.5.0p4_1.tbz
    
    as I wanted it installed in my local policy dir /usr/public (which
    gets mounted RO in every jail). My 1.4.2 java on my other jail
    server is installed like this (but was built inside the jail many
    moons ago).
    
    Now, when I try to run java I get
    
    # java -version
    Error: could not find libjava.so
    Error: could not find Java 2 Runtime Environment.
    #
    
    Java is in /usr/public/jdk1.5.0/ (the same as my 1.4.2 on the other
    server which is in /usr/public/jdk1.4.2/). libjava.so is inside the
    lib dir and I thought that java was referential to itself so it could
    find its libraries.
    
    I also tried setting JAVA_HOME and JRE_HOME though I have not had to
    do that in a long time.
    
    The new 1.5 jdk is registered in the javavms file .
    
    When I run the javavm script with /bin/sh -x it does run the correct
    java and running it with an explicit path does not help.
    
    # /bin/sh -x /usr/public/bin/javavm -version
    + _JAVAVM_SAVE_PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/games:/usr/pub/
    sbin:/usr/pub/bin:/usr/local/sbin:/usr/local/bin:/usr/X11R6/bin:/root/
    bin
    + export PATH=/bin:/sbin:/usr/bin:/usr/sbin
    + _JAVAVM_PREFIX=/usr/public
    + _JAVAVM_CONF=/usr/public/etc/javavms
    + _JAVAVM_OPTS_CONF=/usr/public/etc/javavm_opts.conf
    + basename /usr/public/bin/javavm
    + _JAVAVM_PROG=javavm
    + _JAVAVM_MAKE=/usr/bin/make
    + [ javavm = javavm ]
    + echo javavm: warning: The use of 'javavm' as a synonym for 'java'
    is deprecated
    javavm: warning: The use of 'javavm' as a synonym for 'java' is
    deprecated
    + _JAVAVM_PROG=java
    + [ -r /usr/public/etc/javavm_opts.conf ]
    + . /usr/public/etc/javavm_opts.conf
    + _JAVAVM_OPTS=
    + setJavaHome
    + realpath
    + realpath /usr/public
    + [ -n -a /stubs/usr_local/etc/ssmtp != /usr/public ]
    + unset JAVA_HOME
    + _JAVAVM_PORTSDIR=
    + [ -r /usr/share/mk/bsd.port.mk ]
    + /usr/bin/make -f /usr/share/mk/bsd.port.mk -V PORTSDIR
    + _JAVAVM_PORTSDIR=
    + _JAVAVM_BSD_PORT_MK=
    + [ -n -a -r /Mk/bsd.port.mk ]
    + [ -n ]
    + [ ! -e /usr/public/etc/javavms ]
    + sed -E s|[[:space:]]*#.*||
    + uniq
    + _JAVAVM_VMS=/usr/public/jdk1.5.0/bin/java
    /usr/public/linux-sun-jdk1.4.2/bin/java
    + [ -n ]
    + dirname /usr/public/jdk1.5.0/bin/java
    + JAVA_HOME=/usr/public/jdk1.5.0/bin
    + dirname /usr/public/jdk1.5.0/bin
    + JAVA_HOME=/usr/public/jdk1.5.0
    + basename /usr/public/jdk1.5.0
    + _JAVAVM_VM=jdk1.5.0
    + [ -n ]
    + [ -n ]
    + [ -n ]
    + [ -n /usr/public/jdk1.5.0 -a -f /usr/public/jdk1.5.0/bin/java ]
    + _JAVAVM_PROG_PATH=/usr/public/jdk1.5.0/bin
    + return 0
    + [ 0 != 0 ]
    + [ -x /usr/public/jdk1.5.0/bin/java ]
    + basename /usr/public/jdk1.5.0
    + setJavaOptions java jdk1.5.0
    + echo java
    + sed -e s/\./_/g -e s/-/_/g
    + local OPTS_PROG=java
    + echo jdk1.5.0
    + sed -e s/\./_/g -e s/-/_/g
    + local OPTS_JAVA_HOME=jdk1_5_0
    + eval echo ${JAVAVM_OPTS_jdk1_5_0_java}
    + local JAVA_HOME_PROG_OPTS=
    + eval echo ${JAVAVM_OPTS_jdk1_5_0}
    + local JAVA_HOME_OPTS=
    + eval echo ${JAVAVM_OPTS_java}
    + local PROG_OPTS=
    + [ -n ]
    + [ -n ]
    + [ -n ]
    + [ -n ]
    + export JAVA_HOME
    + tryJavaCommand /usr/public/jdk1.5.0/bin/java -version
    + [ -n ]
    + [ -x /usr/public/jdk1.5.0/bin/java ]
    + [ -n /sbin:/bin:/usr/sbin:/usr/bin:/usr/games:/usr/pub/sbin:/usr/
    pub/bin:/usr/local/sbin:/usr/local/bin:/usr/X11R6/bin:/root/bin ]
    + export PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/games:/usr/pub/sbin:/
    usr/pub/bin:/usr/local/sbin:/usr/local/bin:/usr/X11R6/bin:/root/bin
    + exec /usr/public/jdk1.5.0/bin/java -version
    Error: could not find libjava.so
    Error: could not find Java 2 Runtime Environment.
    #
    
    What did I do wrong?
    
    Thanks
    Chad
    
    ---
    Chad Leigh -- Shire.Net LLC
    Your Web App and Email hosting provider
    chad at shire.net
    
    _______________________________________________
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    http://lists.freebsd.org/mailman/listinfo/freebsd-java
    To unsubscribe, send any mail to "email***@***.com"
- 1
  - M.I'5.Persecut ion ` h ow a nd wh y d id it st art?-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
    -= how. and why did it start? -=
    -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
    
    The harassment didn't start by itself, so someone. must have been there at
    the outset to give it a firm push and set the "animals" after me. It. looks
    as if I was. set up in June 1990, and the timing indicates someone from
    university. was responsible.
    
    >One thing which has. been missing from this discussion is this simple
    >prognosis: that maybe he is. right and that, despite his admitted
    >mental condition, there really is a campaign against. him organised by
    >now-influential ex-students of. his university.
    
    In May or June 1990, Alan Freeman on Radio 1 read out a letter from. someone
    who had known me for a few years, who. wrote of the one who "wore out his
    welcome with random precision" (from the Pink Floyd. song). Freeman went on
    to say to the writer "that's a hell of a letter. you wrote there". The
    indication is strongly that. people I had parted from soon before nursed a
    grudge against me and were trying to. cause trouble for me.
    
    The suggestion is that Freeman might have shown the letter. to other people,
    and things could. have snowballed from there. Right from the start the real
    source (security services presumed). didn't announce themselves as the
    origin,. but let the "talkers", the radio DJs, believe that they were the
    originators. Think about it; if you. announce, "we're MI5 and we have a
    campaign against this bloke" then people might not go along. with it; but if
    you say, "everyone else. is getting at this bloke because he 'deserves' it"
    then people. will join in with fewer qualms.
    
    >Why. would "they" wish to assassinate your character?
    
    It's the classic case of hitting a cripple to prove you're. stronger. Why
    would the security services expend hundreds of. thousands of pounds and more
    than six years of manpower to try to kill a British citizen? Because. they
    are motivated by people who knew me at. university and feel personal
    animosity; because they knew me to be emotionally weak, and it is. in the
    nature of bullies to prey on those known. to be weak; and because they can
    rely on the complicity of the establishment, which the. security services
    manipulate and derive funding from. This is. England's biggest humiliation
    today,. and the British security services are intent on preventing their
    humiliation becoming reality by. continuing their campaign of attempted
    murder to suppress the. truth from becoming public.
    
    10751
- 2
  - Running server-side Java on FreeBSD in production environments
    So, I've seen a few mentions here of folks using Java server apps on
    FreeBSD in production. I've been very happy to watch the progress by the
    Java team on the native JDKs from the sidelines, as well as the
    improvements to libc_r and such that have been MFC'd, but I'm curious as
    to whether the consensus on this list is that it's ready to be used for
    production. Anyone want to share good success or horror stories? We're
    trying to determine whether the apache.org box can start to run our own
    software. :) Speed is definitely less important than proper functioning.
    
    Brian
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- 3
  - where to find graphics for buttonsI'm searching for free graphics to grade up my app by using icons on the
    buttons for edit, new, delete, save, cancel and so on.
    Java class ImageIcons supports gif, jpeg and png format.
    
    Anybody knows a free available source for this basic app icons?
- 3
  - Roedy 's convertor, Where is Short ? Where is Byte?Hi Roedy,
    
    This is what you advertise for in
    http://www.mindprod.com/zips/java/converter.txt:
    
    signed byte Byte
    unsigned byte Byte
    short Short
    char Character
    int Integer
    long Long
    float Float
    double Double
    char[] String
    
    This is what you have in your code:
    
    public static final String [] flavours = {
    "boolean",
    "/*signed*/ byte",
    "/*unsigned*/ byte",
    "short",
    "char",
    "int",
    "long",
    "float",
    "double",
    "String",
    "Boolean",
    "Character",
    "Integer",
    "Long",
    "Float",
    "Double"};
    
    Noticed anything? Is it voluntary or did you forget java.lang.Byte
    and java.lang.Short?
    
    Either the advertisement or the code need to be updated.
    
    My apologies if you have already explained why.
    
    BTW, neat little tool I always come back from time to time.
    
    Cheers, Mike
- 5
  - Help to understand 'array of classes' exampleHi,
    
    I'm trying to create/use an array of classes, and I found the following
    code snippet using Google Groups:
    
    ...
    rectangle[ ] array_name = new rectangle[ 100 ]; // or whatever
    size
    for ( int n = 0; n < 100; ++n )
    {
    array_name[ n ] = new rectangle( );
    }
    ...
    int i = 99;
    int wide = array_name[i].getwidth( );
    ...
    
    The above snippet was from:
    
    http://groups.google.com/group/comp.lang.java.programmer/msg/1ea4bbde51104914
    
    What I'm trying to understand in the above snippet is the line where the
    array is initialized:
    
    rectangle[ ] array_name = new rectangle[ 100 ]; // or whatever size
    
    Before I found that post, I was trying something like:
    
    rectangle [] arrayName; // declear an array of 'rectangle classes'
    .
    .
    rectangle[0] = new rectangle(); // instantiate rectangle/populate array
    rectangle[1] = new rectangle(); // instantiate rectangle/populate array
    
    I did it that way because I don't know the number of classes that I'll
    want to have in the array of classes ahead of time.
    
    The code per the snippet from the cited posts works, but my original
    code would get a NullPointerException, and I don't understand why.
    
    Can someone explain this?
    
    Also, is it possible to do this in a way that I don't have to allocate a
    fixed size array?
    
    Thanks,
    Jim
- 6
  - J2ME internationalizationI want to provide the binary with *only one* language, because I want to
    be as small as I can.
    
    But I want to provide many binaries (one per language).
    
    So, I write the code with hardcoded strings like "$_nearest_dist_$".
    I write a file like:
    -----english.ini----
    $_nearest_dist_$=Nearest distance is 90m
    --------------------
    and I write a php script which in *.java files, replaces all strings in
    form "$_*_$" with language correct string.
    php phpWriteStringsToSource.php <project_folder> <language.ini>
    
    THE BIG PROBLEM: I realize that *.java files must have ansi* encoding!
    Any of utf-8, uc16le or be is not compiled correct!
    
    So, what I can do?
- 8
  - JTable and Custom Default Cell Editors
    From: "Erica Wheatcroft" <email***@***.com>
    Subject: JTable
    Date: Thursday, January 20, 2005 4:17 PM
    
    HI -
    
    I have a jtable that uses two custom default cell editors to create combo
    boxes for two of the the 4 columns. If the user selects another value from
    either of the combo boxes i want to know that so i can indicate a save must
    occur. I'm not sure what event i should listen to? Does any one have any
    suggestions?
    
    Thanks in advance.
    
    Erica
- 10
  - TableCellRender puzzleBelow is a fairly simple TableCellRenderer for displaying an enum as
    an Icon. That works fine. But I added a wrinkle, changing the
    background colour depending on whether the row is selected.
    
    No background colour changes happen, even though isSelected is true
    when it should be. I wonder if I am missing something obvious.
    
    package com.mindprod.vercheck;
    
    import javax.swing.*;
    import javax.swing.table.TableCellRenderer;
    import java.awt.*;
    
    /**
    * render a the AppSate enum cell, use icon without text.
    */
    final class AppStateRenderer implements TableCellRenderer
    {
    // ------------------------------ FIELDS
    ------------------------------
    
    private static final JLabel template = new JLabel( "",
    JLabel.CENTER );
    
    private Color background;
    
    private Color selectedBackground;
    
    // -------------------------- PUBLIC INSTANCE METHODS
    --------------------------
    /**
    * constructor
    *
    * @param background background colour
    * @param selectedBackground background colour when seleced
    */
    public AppStateRenderer( Color background, Color
    selectedBackground )
    {
    this.background = background;
    this.selectedBackground = selectedBackground;
    }
    
    public Component getTableCellRendererComponent( JTable table,
    Object value,
    boolean
    isSelected,
    boolean hasFocus,
    int row,
    int column )
    {
    System.err.println( "selected:" + isSelected + " " + row + " "
    + table.getSelectedRow() );
    
    template.setIcon( ( (AppState) value ).getIcon() );
    template.setBackground( isSelected? selectedBackground :
    background );
    
    return template;
    }
    }
    --
    Roedy Green, Canadian Mind Products
    The Java Glossary, http://mindprod.com
- 10
  - passing RequestPath to error page from web.xmlHi,
    
    I have pointed any errors to Error.jsp in my web.xml file (as shown).
    
    <error-page>
    
    <error-code>500</error-code>
    
    <location>/Error.jsp?id=500</location>
    
    </error-page>
    
    As you can see I also pass the type of error, is there any way I can
    pass the RequestPath that resulted in the error in the first place?
    
    Cheers,
    Paul
- 10
  - generate certificate from PEMHi,
    
    I am developing a middleware solution for our companyy. I have got 2
    certifcates clkey.pem and clcert.pem for the final application. How I
    can combine these 2 keys in 1 certificate? Do I need to first create
    self signed certificate?
    
    Thx in advance.
- 10
  - Great SWT ProgramIn article <email***@***.com>,
    Twisted <email***@***.com> wrote:
    > On Aug 21, 1:30 pm, Joe Attacki <email***@***.com> wrote:
    > [Attacki misattributed the quoted text once again]
    > [insulting nonsense deleted]
    > > Honestly, I don't care if he advertises his open-source project in here,
    > > but the fact that he was underhanded about it is what I took issue with.
    >
    > I've provided a reasonably plausible and much more charitable
    > interpretation of his actions. You are quick to see malice where there
    > may well be none;
    
    Oh, the irony.
    
    > probably because your own normal behavior is
    > malicious, so you expect it of everyone else as your default model for
    > a random person's mind is (as is normal) your self-model.
    
    --
    B. L. Massingill
    ObDisclaimer: I don't speak for my employers; they return the favor.
- 11
  - javax and macim running mac os 9.2 with MRJ SDK 2.2. im tring to compile a class
    importing javax.swing.*; it says it cant find it. i unziped all the
    jars and i cant find javax anywhere. is this not supported on this os.
- 13
  - LookAndFeelHi,
    
    I have a couple of issues I'm trying to resolve. Hopefully someone will have
    some ideas.
    
    First, I've been unsucessful trying to get the MotifLookAndFeel working.
    I've following every example I have (on paper) and nothing seems to work.
    I've run the app on both the PC and Linux box; the window looks and feel
    shows up on the PC and metal on the linux machine. Anyone know what's going
    on or what could be missing?
    
    Second, the app I've been working has a bunch of ToggleButtons and the color
    of the button changes based on selection. All I do is set the background
    color in the button press callback. Okay, fine. But when I run the code in
    linux, I'm unable to change the color of the "select" mode of the Toggle
    button. It always gray. Again. Does anyone know what's going on? From all my
    years, this should be extremely simple. Why would it work correctly on the
    PC and not in unix?
    
    Thanks in advance.
    
    Bryan
- 13
  - How do i implement this interfacepublic interface AQuestion
    {
    public abstract void someMethod() throws Exception;
    }
    
    http://www.angelfire.com/or/abhilash/Main.html
    
    see Question no 5.
    
    How do i implement this interface ?
    
    (1) problem is, it has an abstract method and hecne its complicated
    to implement this class.
    
    (2) another problem is, it is the public interface and hence we can not
    make one more public class in the same file....because 1 file can have
    only 1 public access specifier.
    
    is it really possible to implement this interface ?

Author

Message

Roedy Green

Posted: 2005-8-18 10:34:00

Top

java-programmer, To really foul things up requires a computer Partner just got back from a new government job with an amusing tale.

BC is a large province (about 1000 miles top to bottom) so the BC
government decided to set up a computer system so that any printout
could be directed to any printer in the province, thus saving on
courier costs.

However, the default is the system selects a non-busy printer, not
worrying particularly if it is 1000 miles from the intended recipient.

The printouts don't have proper headers to direct them to the person
eagerly awaiting them so most of the printouts ended up in the
shredder.

Roland

Posted: 2005-8-18 16:37:00

Top

java-programmer >> To really foul things up requires a computer On 18-8-2005 4:34, Roedy Green wrote:
> Partner just got back from a new government job with an amusing tale.
>
> BC is a large province (about 1000 miles top to bottom) so the BC
> government decided to set up a computer system so that any printout
> could be directed to any printer in the province, thus saving on
> courier costs.
>
> However, the default is the system selects a non-busy printer, not
> worrying particularly if it is 1000 miles from the intended recipient.
>
> The printouts don't have proper headers to direct them to the person
> eagerly awaiting them so most of the printouts ended up in the
> shredder.
>
As long as there are trees in their province, the BC'n government
shouldn't worry about it.
--
Regards,

Roland de Ruiter
` ___ ___
`/__/ w_/ /__/
/ \ /_/ / \

Index ‹ java-programmer

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- 1
  - Tiles Problem with definitions Error - Tag InsertHi to all,
    
    I have a newbie problem and I would appreciate any help.
    Thanks in advance.
    I have the following constellation:
    
    struts-config.xml:
    <snip >
    <plug-in className= "org.apache.struts.tiles.TilesPlugin " >
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- 2
  - Any goodhearted person willing to explain me a program in Java I gotHello
    
    What I'll will ask may take some of your time.
    
    I have no experience at all with Java. But I could get my hand on a
    programme written in Java, which does exactly what I want.
    
    But I'm eager to learn, and want to know how it does everything.
    
    I'm not interested in the visual aspect but in the communication
    
    What the program does is communicate with a little box, that catches
    data from a machine.
    In essence it replaces a printer.
    The machines prints to a usb port, via a adaptor, the printing data
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    I want to understand that.
    
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- 3
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- 4
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- 5
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    The DocumentBuilderFactory and DocumentBuilder parser for building a
    DOM object tree fails because of a missing end tag.
    
    Is there a way to force partial document parsing? I have turned
    validating off but it continues to throw a fatal error.
    
    Thanks,
    Gary V
- 6
  - jEdit JavaDebuggerDoes anyone know how to set this plug-in up? I have loaded it in jEdit
    but everytime I try and use it it gives a huge long error list and says
    I need JDK 1.3 or above, even though I am using JDK 1.5!
    
    Steve
- 7
  - Set jtable cell coloursHi,
    How do i change the colour of a cell in a Jtable, looked at api but couldnt
    find anything.
    
    Thanks
    Rudy
- 8
  - [ANN] RMI Plug-in for Eclipse v2.0A new version of the RMI Plug-in for Eclipse (v2.0) has been just released.
    
    In the new version there are two new major features:
    
    (*) RMI Spy - Live monitor of the RMI activity in an RMI application
    (*) Ready to use examples - the best way of getting started with RMI in
    Eclipse
    
    The RMI Registry inspector has greatly improved and it can now invoke
    almost any remote method (in previous version it was only possible to
    invoke methods that receive no arguments).
    
    Also new in v2.0 - enhanced Java 5 and Java 6 support.
    
    The standard set of features includes
    (*) Automatic stubs genaration
    (*) Local RMI registry control (start/stop/clean)
    (*) RMI Application Launcher - easy codebase and security policy
    configuration.
    
    More info at: http://www.genady.net/rmi/v20/
    
    Genady Beryozkin,
    Author of the RMI Plug-in for Eclipse
- 9
  - How to set size for JComboBoxHi all,
    
    I am developing an application, which will have two JComboBoxes and
    two JTables, and i am using gridbag layout.
    
    when the initial string for JComboBox is small enough then these
    sets(JComboBox and JTable) are divided equally, when the initially
    string is big then the two sets(JComboBox and JTable) are not divided
    equally, how can i divide them equally irrespective of the string
    length.
    
    I used the setSize(),setPreferredSize(),and setMaximumSize() for
    JComboBox but there is no result ,
    Plz help me,
    
    Thanks in advance
    dwurity
- 10
  - Row "headers" in JTableJ2SE 5.0_05 on Windows Server 2003 SP1.
    
    What I want to do is something like a column header only it's a row header
    that is effectively a JTable column that is fixed in position on the left of
    the view and can't be reordered or gain focus.
    
    Is this possible? I've looked through the documentation and done a Google
    search but can't find anything which probably tells me that it can't be
    done. What are your thoughts? It probably needs scroll behaviour similar
    to a header too.
    
    Thanks,
    
    Wes
- 11
  - Java rendering problems when antialiasing is enabledI've written a Java app which uses Swing to display images and text.
    
    The app consists of a JFrame which contains a JPanel-derived class. In
    the paint() method of the JPanel-derived class, I call
    Graphics.drawImage() to render an image file previously loaded with
    ImageIO.read().
    
    This was working fine until I enabled antialiasing in my video card
    settings (GeForce FX 5200 w/128MB RAM, Windows XP SP2). With
    antialiasing, none of the content gets rendered in the window. The
    problem exhibits itself when I'm tring to render the image myself and
    when I just have a JProgressBar control displayed in the window (i.e.
    the Swing components themselves aren't correctly rendering with
    antialiasing turned on either).
    
    I've received feedback from multiple users seeing this issue as well,
    so its not just my machine.
    
    Any ideas? Disabling antialiasing fixes the problem, but I'd like to
    be able to get my app to work regardless of whether antialiasing is
    enabled/disabled.
- 12
  - RegEx !compileHi,
    
    I am using Eclipse, Java SDK 1.4 and the java.uitl.regex
    
    I am trying to using regular expressions in my code
    
    I could write something simple like:
    
    String re = "\d";
    
    And I am receiving an invalid escape sequence error.
    
    And I am not so sure why
    
    Aidy
- 13
  - Is JAR signing _ever_ harmful?I'm having a series of ructions with our on-site installation people,
    re: JAR signing. It's a big app, big budget, and we have lots of
    be-suited consultants running around on customer sites for long
    periods. I live back in the coder's garret, making the product.
    Sometimes they throw me the odd doughnut.
    
    Basically they're reporting every bug and misconfiguration they can
    find as being caused by our recent switch to JARs rather than loose
    .class files, and in particular by these JARs being signed. It's a
    self-generated key, without an X509 cert (at present).
    
    Before I go postal with the +3 Lart-o-doom, can I please ask if there
    are _ANY_ circumstances, no matter how perverse, where signing a JAR
    could cause something to break? I know of nothing. Nada. Zilch.
    
    One problem we have had was due to signing across two JARs having been
    done by different keys. As the real problem here was trying to mix code
    from product versions V1 and V2 (a big non-no anyway) then I see this
    more as a feature than a bug. But try telling them that...
- 14
  - Array optimizing problem in C++?
    From an old post by James Kanze
    
    On Apr 9 2003, 5:42 pm, email***@***.com (James Kanze) wrote:
    
    >When I pass an "array" to a function in C/C++, I actually pass
    >a pointer to the first element. And the compiler, when it compiles the
    >function, only sees pointers -- it has no way of determining any
    >relationship between them. Consider, for example, a smoothing function
    >(in C or earlier C++):
    >
    > void
    > smooth( double* dest,
    > double const* src,
    > size_t len )
    > {
    > for ( size_t i = 1 ; i < len - 1 ; ++ i ) {
    > dest[ i - 1 ] = (src[ i - 1 ] + src[ i ] + src[ i + 1 ]) / 3 ;
    > }
    > }
    >
    >
    >The compiler cannot arrange to use the src[ i + 1 ] value from the
    >preceding pass through the loop as the src[ i ] value in the current
    >pass, since the write to dest[ i - 1 ] might have changed it. In Java,
    >it can, since two arrays are either identical or disjoint.
    >
    >
    >This sort of code shows up frequently. In benchmarks from Java
    >suppliers comparing Java to C++, of course:-). But also in any number
    >of applications dealing with physical measures: meteorology, geophysical
    >research (oil prospection), etc.
    
    Out of curiosity, I tried to test if the above is true. It didn't make
    any difference. In fact, C++ was a bit faster (not by much, just 6%).
    Probably due to array bound check in Java, if there is in indeed an
    issue with C++ arrays, overall there is no difference.
    
    ==c++==
    #include <iostream>
    #include <cstdlib>
    #include <ctime>
    
    void fill (double* src, int len);
    void smooth (double* dest,
    double const* src,
    int len );
    
    int main()
    {
    const int len = 50000;
    
    double src_array [len] = {0};
    double dest_array [len] = {0};
    
    fill(src_array, len);
    
    clock_t start=clock();
    
    for (int i = 0; i < 10000; i++)
    smooth (dest_array, src_array, len);
    
    clock_t endt=clock();
    
    std::cout <<"Time smooth(): " <<
    double(endt-start)/CLOCKS_PER_SEC * 1000 << " ms\n";
    
    // doesn't work without the following cout on vc++
    std::cout << dest_array [0] ;
    
    return 0;
    }
    
    void smooth (double* dest, double const* src, int len )
    {
    for (int i = 1 ; i < len - 1 ; i++ ) {
    dest[ i - 1 ] = (src[ i - 1 ] + src[ i ] + src[ i + 1 ]) / 3 ;
    
    }
    }
    
    void fill (double* src, int len)
    {
    srand((unsigned)std::time(0));
    
    for (int i = 0 ; i < len ; ++ i ) {
    src[i] = rand();
    }
    }
    
    ==== java ========
    
    import java.util.*;
    
    public class Arrays{
    public static void main (String[] arg)
    {
    final int LEN = 50000;
    double[] src_array = new double [LEN];
    fill(src_array, LEN);
    double[] dest_array = new double [LEN];
    
    long start = System.currentTimeMillis();
    
    for (int i = 0; i < 10000; i++)
    smooth(dest_array, src_array, LEN);
    
    long end = System.currentTimeMillis();
    
    System.out.println("Time smooth(): " + (end - start) + " ms");
    
    }
    
    static void smooth (double[] dest, double[] src, int len )
    {
    for (int i = 1 ; i < len - 1 ; i++ ) {
    dest[ i - 1 ] = (src[ i - 1 ] + src[ i ] + src[ i + 1 ]) / 3 ;
    }
    }
    
    static void fill (double[] src, int len)
    {
    for (int i = 0 ; i < len; i++)
    src[i] = Math.random();
    }
    
    }
- 15
  - [Eclipse]typing "{"??Eclipse is so kind it places "{" and "}" automatically when I tell it I want
    to write down a method but...alt+123 doesn't work if I sipmly want to put a
    "{" in the code.
    Why?
    How can I write down a "{"?
    Does it sepends on using cp1252 instead of ascii?
    
    thanks
    Fabio