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- 2
  - ToolTip for Graphical ItemsHello,
    
    I'm trying to make a tool tip pop up whenever the user does a
    mouse-over on a filled rectangle that I've drawn on the screen. I have
    no trouble creating the rectangle
    
    Rectangle test = new Rectangle();
    
    And it seems like there should be something like
    test.setToolTipText("rectangle"), but as far as I can tell, there's
    nothing like that. Is there some way to do this?
    
    Thanks,
    Ben
- 3
  - portal library needed ?Hi all ,
    
    I am trying to build a portal which will consist of functions like log
    in , user management and some cms stuff and will probably develop more in
    the future. So I am trying to search for some portal building library. Has
    anyone try one of these portal library like jetspeed, jPorta, liferay ... ?
    Is it really that useful ? On what basis should I use one ? As i think the
    learning curve maybe quite large that I am sure i can build faster without
    it. But I am not sure if I would need it when I further develop the site.
    
    And can anyone share some pros and cons of the library.
    
    Thanks.
    
    Perseus
- 5
  - A strange linux command execution problem from ProcessHi All,
    
    I am using Process class to run scripts on a Fedora Core Linux
    bash shell
    All of my scripts are running except tho one in which i am using diff
    command.
    
    I am using simple diff command. My script is
    
    -------------------------------------------------------------------------------------
    #/bin/sh
    
    if [ $# -eq 0 ];
    then
    echo "Usage: newFile oldFile outputFile"
    exit
    fi
    
    FILE1=$1
    FILE2=$2
    
    OUTPUT_FILE=$3
    
    echo "diff -c $FILE1 $FILE2 > $OUTPUT_FILE"
    #diff -c $FILE1 $FILE2 > $OUTPUT_FILE
    
    diff -c $FILE1 $FILE2 > $OUTPUT_FILE
    
    ------------------------------------------------------------------------------------------------
    
    And I am also consuming the error and output streams so not blocking
    the process.
    the process returns with exit value > 0.
    
    It would be a great help to me. If you help me solve this problem.
    
    -Thanks,
    Ratnesh.
- 10
  - UTF 16 (byte[]) <--> String?Hi,
    
    is there a convenient way to convert unicode that's stored in byte array to
    java String?
    and vice-versa?
    
    e.g. for a single single unicode,
    the higher byte would be in byte[0],
    lower byte[1]
    and byte[2], byte[3] = 0. null terminated
    
    the byte array of unicode is generated from a C program and transfered over
    the network ..
    
    looking over the String API doesn't reveal much ... or am I overlooking
    something?
    
    Thanks in advance.
- 11
  - Reset button cannot clear fields after displaying error messagesHello
    
    my form extends from ValidatorForm
    and making use of validator.xml and validator-rules.xml,
    
    The reset button can clear fields within form
    if the submit is not pressed.
    
    If I pressed the submit button and
    error messages display on the top of the form.
    And then now I click the reset button again,
    fields cannot be cleared.
    
    Why is it so?
- 12
  - default value of data member.Hi
    
    I have a problem about default value of data member!
    
    +++++++ cut here++++++
    class CComputer
    {
    private double cpu=3.0;
    private double memory=1.0;
    
    public void set(double c)
    {
    if(c<0)
    System.out.println("Input cpu error, cpu is default value");
    else
    this.cpu=c;
    }
    public void set_memory(double m)
    {
    if(m<0)
    System.out.println("Input memory error, memory is default
    value");
    else
    {
    memory=m;
    show_memory();
    }
    }
    
    public void set(double c,double m)
    {
    set(c);
    set_memory(m);
    }
    void show_cpu()
    {
    System.out.println("cpu="+this.cpu);
    }
    void show_memory()
    {
    System.out.println("memory="+this.memory);
    }
    void show_all()
    {
    this.show_cpu();
    this.show_memory();
    }
    }
    public class bbb
    {
    public static void main(String args[])
    {
    CComputer c1=new CComputer();
    
    c1.set(-3.5,1.5);
    c1.show_all();
    c1.set(-3.5,-2.0);
    c1.show_all();
    c1.set(-3.5);
    c1.show_all();
    }
    }
    +++++++
    
    The output of "c1.set(-3.5,-2.0);" shows memory=1.5.
    The output of " c1.set(-3.5);" also shows memory=1.5;
    
    Why? I thought memory should be default value, i.e. 1.0.
    
    Thank you in advance.
    
    Mike
- 12
  - MI5-Persecution: MI5 Waste Taxpayer Millions on Pointless Hate-Campaign (18598)I don't know what the hell this is. But he/she/it asked for a respond. I
    sent a 19 MB picture of my middle toe. I hope they liked it, and I have no
    message saying the message did not go through. Say they must like it. I am
    working on 100 MB pictures
    
    --
    AZ
    <email***@***.com> wrote in message news:email***@***.com...
    >
    > MI5 Persecution Update: Friday 30 April, 1999
    >
    > If You Intend To Reply, Please Read This
    > Please.... keep your response to one page!. Faxes over a page or two will
    > be deleted without being read.
    >
    > Somewhere between 0 and 100%
    >
    > The last few days there have been no clear recordable instances of
    > abuse. However, while travelling on the Underground, while walking around
    > near my home and going to friends homes, I am constantly troubled by
    > thoughts that those people over there might be about to get at me; that
    > the couple sitting in the opposite seats laughing are in fact laughing at
    > me; et cetera, et cetera.
    >
    > A comment by a scientist to the BSE inquiry sticks in my mind. He
    > described the possible scale of the epidemic as "between 0% and 100%". It
    > might not be happening, it might not happen at all, to any discernable
    > degree.... or it might be total. Without clear recording, which seems to
    > have become impossible the last couple of weeks, there is no way of
    > knowing whether the harassment really is continuing, whether we have
    > entered a temporary hiatus, or whether perhaps it has perhaps stopped for
    > now.
    >
    > But for the time being I think there arent any reasons to dicontinue these
    > faxes. I only re-started them six weeks ago in response to a resumption of
    > MI5 harassment; and I think I will need to be more convinced of absence of
    > persecution before I discontinue my complaints.
    >
    > The Newscasters are still watching
    >
    > In the last few weeks there have been at least a couple of fairly overt
    > instances of "interactive watching" by newscasters. I reported this in a
    > previous "MI5 Persecution Update".
    >
    > These instances are really very rare compared to 1990-91, when there were
    > many dozens of such occurrences. Undoubtedly the reduction is due to my
    > practice of videotaping everything I see. Recently I had the opportunity
    > of showing this years "happenings" (Jon Snow/Nicholas Witchell) to my
    > psychiatrist, and he agreed that in both cases the newscasters were
    > expressing merriment without visible cause, and that objectively it might
    > be possible for my claims to be true - although of course other people
    > reported similar thoughts to him, and this thinking is usually a symptom
    > of illness.
    >
    > Read About the MI5 Persecution on the World Wide Web
    >
    > The March 1998 issue (number 42) of .net Magazine reviews the website
    > describing it as an "excellent site". Since August 11, 1996 over 50,000
    > people have browsed this website.
    >
    > You are encouraged to read the web pages which include
    >
    > a FAQ (frequently asked questions) section outlining the nature of the
    > persecutors, their methods of harassment through the media, people at work
    > and among the general public
    >
    > an evidence section, which carries audio and video clips of media and
    > workplace harassment, rated according to how directly I think they refer
    > to me
    >
    > objective descriptions of the state security agencies involved
    >
    > scanned texts of the complaints I have made to media and state security
    > agencies involved
    >
    > posts which have been made to netnews over the last four years on this
    > topic
    >
    > Keith Hill MP (Labour - Streatham), my elected representative, as ever
    > refuses to help.
    >
    > MI5 Waste Taxpayer Millions on Pointless Hate-Campaign
    >
    > Recently I was talking to an independent observer about the nature and
    > purpose of the perceived campaign of persecution against me. The person I
    > spoke to, a highly intelligent man, said he was struck by the utter
    > pointlessness of the perceived campaign against me. He also said that, if
    > my theories were in fact true, many people would have to be involved, in
    > the surveillance itself, and in the technical side of the delivery of
    > information from my home to TV studios for example, if the "interactive
    > watching" were happening as described. He voiced these thoughts without
    > any prompting from me; but both I and other observers had arrived at
    > pretty much the same conclusions, some years ago.
    >
    > I saw a team of four men at Toronto Airport in 1993
    >
    > To carry out the surveillance alone, full-time, would employ four or five
    > men, or their equivalent in terms of man-hours. Each man would "work" an
    > eight-hour shift, so you would need at least three men doing the
    > surveillance, plus a connecting link / manager. An indicator that this
    > estimate is correct arrived in 1993, when I was accosted by one of a group
    > of four men at Toronto Airport; he said, laughing, "if he tries to run
    > away well find him". Plainly these were the men who had been involved in
    > the intrusive surveillance of me for the preceding three years.
    >
    > On other occasions, I have seen the same man on two or three occasions. On
    > one such occasion, at Ottawas Civic Hospital in November 1996; he gave his
    > name to the doctor as "Alan Holdsworth" or some such; my hearing is not
    > very good sometimes and I am not sure of the surname, although I am sure
    > "Alan" was his first name. I saw exactly the same man again in Ottawa, at
    > the airport, in July 1998. Obviously, other people must be "working" with
    > this person; he would not be the sole agent employed in this case.
    >
    > Usenet readers views on the Cost to MI5 of Running the Campaign
    >
    > Here's what a couple of other people on internet newsgroups / Usenet
    > (uk.misc) had to say regarding the cost of running such an operation...
    >
    > PO: >Have some sense, grow up and smell reality. What you are talking
    > about
    > PO: >would take loads of planning, tens of thousands of pounds and lots of
    > PO: >people involved in the planning, execution and maintenance of it. You
    > PO: >must have a very high opinion of yourself to think you are worth it.
    >
    > and......
    >
    > PM: >But why? And why you? Do you realize how much it would cost to keep
    > PM: >one person under continuous surveillance for five years? Think about
    > PM: >all the man/hours. Say they _just_ allocated a two man team and a
    > PM: >supervisor. OK., Supervisor's salary, say, #30,000 a year. Two men,
    > PM: >#20,000 a year each. But they'd need to work in shifts -- so it would
    > PM: >be six men at #20,000 (which with on-costs would work out at more
    > like
    > PM: >#30,000 to the employer.)
    > PM: >
    > PM: >So, we're talking #30,000 x 6. #180,000. plus say, #40,000 for the
    > PM: >supervisor. #220,000. Then you've got the hardware involved. And
    > PM: >any transcription that needs doing. You don't think the 'Big Boss'
    > PM: >would listen to hours and hours of tapes, do you.
    > PM: >
    > PM: >So, all in all, you couldn't actually do the job for much less than
    > PM: >a quarter million a year. Over five years. What are you doing that
    > makes
    > PM: >it worth the while of the state to spend over one and a quarter
    > million
    > PM: >on you?
    >
    > Those are pretty much the sort of calculations that went through my head
    > once I stopped to consider what it must be costing them to run this
    > operation. At the very least, a quarter million a year - and probably much
    > more, given the intrusive and human-resource-intensive methods
    > employed. Times nine years. Equals well over two million pounds - and
    > probably much, much more.
    >
    > Its wasteful for someone with my skills to be unemployed
    >
    > The wastefulness of the MI5 campaign against me is not just that of futile
    > expenditure on their side. It is also extremely wasteful for someone with
    > my talents to be unemployed and on a disability pension. I am highly
    > qualified in numerate disciplines, yet am unable to work, specifically
    > because of the MI5 hate-campaign against me. It is a terrible waste of
    > resources for a supposedly efficient economy like that of the UK to be
    > squandering the talents of a skilled and capable worker.
    >
    > I made every effort to remain in employment for as long as I could, but
    > ultimately I was defeated by MI5s employment of massive resources
    > specifically targeted on my workplaces with the sole aim of seeing me
    > evicted from those workplaces. You might expect this sort of behaviour
    > from the Stasi or some other secret police force in a communist country
    > where labour is cheap, and the governments aim on seeing its citizens
    > confined; but for a supposedly free and efficient economy like Britains,
    > the wastefulness resulting both directly and indirectly from the Security
    > Services activities is simply criminal, and should never be allowed.
    >
    > The international dimension means the costs are multiplied many times
    > overoer had any sense, then they have surely taken leave of them over the
    > last nine years.
    >
    > Four years of persecution in Canada
    >
    > The persecution re-started within less than five minutes of my arrival in
    > Canada, as documented above, and in the "frequently asked
    > questions" article on the website. The words, "if he tries to run away
    > well find him" spoken by one of the harassers at Toronto Airport are now
    > imprinted on my mind.
    >
    > A year later I emigrated to Canada, intending to find a job and settle
    > there, hoping that MI5s interest in me might dim with time. I did manage
    > to find work there, but my hopes of avoiding Security Service interest
    > were ground into dust. As detailed above, I saw the same man in November
    > 1996 and July 1998, both times in Ottawa. Apart from these encounters,
    > there were numerous incidents between 1994 and 1998 of harassment, of an
    > identical nature and in most cases using identical words to what had
    > occurred in the UK. It became quite clear to me that the permanent
    > surveillance and harassment operation which MI5 had subjected me to in
    > England was being continued.
    >
    > For a team of four or five men to be employed overseas must cost a lot
    > more than if they operate in their home country. And for MI5 to continue
    > the operation for a period of over four years, continuously, must cost
    > many hundreds of thousands of pounds. This confirms my belief that the
    > state is funding the campaign against mehat the Security Service receives
    > current annual funding of #160M. Divided by 1850 staff, works out at
    > #86,000. But the unit annual cost of each "watcher" must be much higher
    > than this, especially given the frequently mobile and overseas nature of
    > their actions of the last few years. A very conservative figure might be a
    > little over #100,000 pa for each of a team of five people, or half a
    > million pounds per year. For nine years, so far. So the most conservative
    > estimate of the surveillance element alone is perhaps four or five million
    > pounds since 1990.
    >
    > This guesstimate is of course theoretical - I am not privy to inside
    > details of how MI5 split their funding. But to take some other examples,
    > the cost of a US counter-surveillance specialist per day is USD
    > 5,000. Even if the agents permanently assigned to me are not of this
    > calibre - even if they employ specialists when difficult work planting
    > bugs etc is encountered - their salary and support costs must still be
    > very high. The individual agents are doing well for themselves as they are
    > well-paid to exercise psychopathic instincts which in any sane society
    > would see them in prison; but the taxpayers who must fund this terribly
    > wasteful exercise are being "done" out of hundreds of thousands of pounds
    > each year.
    >
    > It must be emphasised that the above estimates are highly
    > conservative. Besides the surveillance operation, it must carry a high
    > cost in man-hours to propagate covert slanders through the population; to
    > setup and maintain the "interactive watching" links to TV and radio
    > stations, which these organisations continue desparately to "lie and
    > deny"; and to induce antipathy in co-workers which would not otherwise
    > exist.
    >
    > Why they are wasting Millions of Pounds on a "Nobody from South London"
    >
    > As remarked in the prologue to this article, it is really most
    > extraordinary that the Security Service spends a chunk of its budget,
    > every year for nine years so far, on a meaningless campaign against a
    > "nobody from South London". That they are spending such a large amount of
    > money has been confirmed to me on several occasions, usually by oblique
    > references to "its costing this country millions". The supposed
    > "logic" behind the persecution is that MI5 wish to avoid their harassment
    > of me, and the involvement of the UK media, to be made public; yet as the
    > reader will appreciate that is a circular argument, "theyre doing it
    > because they want to keep it secret and avoid humiliation for themselves
    > and their country" begs the question, "why did they start doing it in the
    > first place?", to which in truth I myself do not know the answer.
    >
    > Plainly MI5 with its rich budget can afford half a million pounds a year
    > to waste on a "nobody from South London". Some time ago I was talking to a
    > British surveillance professional on Compuserve who told me "this work
    > costs a lot of money and is usally because the person I am following has
    > done something (usually criminal) to warrant all this money and time being
    > spent." Yet in this particular case it is plainly not the "victims
    > fault" that the harassment is taking place. The hate-campaign against me
    > is completely the creation of the obsessive psychologies of the MI5 agents
    > who have made themselves my persecutors; it is obviously a
    > "personal" campaign for them, and for years they misuse taxpayer funding
    > to feed their insane, unnatural and fixated fantasies.
    >
    > 18598
    >
    >
    > --
    > Posted via NewsDemon.com - Premium Uncensored Newsgroup Service
    > ------->>>>>>http://www.NewsDemon.com<<<<<<------
    > Unlimited Access, Anonymous Accounts, Uncensored Broadband Access
- 12
  - Infinite loops in hashCode() and equals()What do you think the following fragment prints?:
    
    List l = new ArrayList();
    l.add(l);
    System.out.println(l.hashCode());
    
    Trick question. The result is an infinite recursion (i.e. a stack
    overflow), since the hash code for a List is calculated from the hash codes
    of its members.
    
    Likewise, the following causes an infinite recursion, since lists are
    defined to be equal when they have the same members.
    
    List l1 = new ArrayList();
    List l2 = new ArrayList();
    
    l1.add(l2);
    l2.add(l1);
    
    System.out.println(l1.equals(l2));
    
    These cases are simple to spot, but the same situation could occur with any
    cyclic graph of objects that compute hash code and/or equality based on the
    values of their members. Also, equals() and hashCode() are often called
    implicitly, for instance when adding an object to a HashSet or HashMap.
    
    I don't see any way this could be addressed other than by keeping track of
    which objects have already been processed by the current hashCode() or
    equals() call, and there's no way to do that without changing the method
    signatures, to, say, add a Set:
    
    in Object:
    
    public final int hashCode() {
    return hashCode(new HashSet());
    }
    
    public final int hashCode(Set processed)
    {
    if (processed.contains(this)) {
    return System.identityHashCode(this);
    }
    else {
    processed.add(this);
    return this.calculateHashCode(processed);
    }
    }
    
    public int calculateHashCode(processed) {
    return return System.identityHashCode(this);
    }
    
    with calculateHashCode(Set) being the method that classes can override and
    hashCode(Set) the method List et al. call on their members. And that is a
    pipe dream, since it isn't possible to make this sort of incompatible change
    at this late date.
- 12
  - Useless Google Holding (was Re: Jewke Hatekass)"Luke Tulkas" <email***@***.com> wrote in message news:<email***@***.com>...
    > "JTK" <email***@***.com> wrote in message
    > news:p0ned.749845$email***@***.com...
    >
    > >> 2. I don't know if he speaks Yiddish or not. Perhaps you'd provide
    > >> information either way. Moreover, speaking various languages makes people
    > >> multilingual but not necessarily multinational. I speak English (well,
    >
    > [snip]
    
    Way back, Google's purchase of old Usenet bulletin boards was probably
    a good thing (through purchase, I believe, of Deja News). Now with
    the continuing evolution of the Internet - with Blogs and associated
    RSS feeds, etc. - this type of forum is becoming largely irrelevant
    and should be done away with. I would like to thank all of you
    nimrods posting this kind of crap on this board for opening my eyes
    completely to this fact. Do you actually regard yourself so highly
    that you think that people actually CARE to read your constant
    blatherings on this and that nonsense?
    
    Every now and then I return to c.l.j.a. just to see if anything of
    interest has been posted - kind of like how I leaf through JDJ to see
    if they've managed to write a decent article. This will hopefully be
    my last visit unless I end up here by mistake or by habit. Thanks
    again.
- 14
  - NoClassDefFound puzzleNoClassDefFound is my least favourite error message. This one has me
    stumped. I have been very sick the last few days and my brain in not
    yet fully engaged, so I hope it is something simple.
    
    I compile this fine, but when I run it, it says class
    com.mindprod.example.TestProgessFilter is not defined.
    The program seems too simple to have a NoClassDefFound problem.
    
    package com.mindprod.example;
    
    import java.io.BufferedReader;
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.FilterInputStream;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.InputStreamReader;
    
    /**
    * @author Roedy Green, Canadian Mind Products
    * @version 1.0, 2007-08-03 Created with IntelliJ IDEA.
    */
    public class TestProgessFilter extends FilterInputStream {
    
    /**
    * tracks how many bytes we have read so far
    */
    long progress;
    
    // -------------------------- PUBLIC INSTANCE METHODS
    --------------------------
    /**
    * Constructor
    *
    * @param in input stream to progress monitor
    */
    public TestProgessFilter( InputStream in )
    {
    super( in );
    }
    
    /**
    * Reads the next byte of data from this input stream.
    */
    public int read() throws IOException
    {
    int ret = super.read();
    progress++;
    reportProgress();
    return ret;
    }
    
    /**
    * Reads up to byte.length bytes of data from this input stream
    into an
    * array of bytes.
    */
    public int read( byte[] b ) throws IOException
    {
    int ret = super.read( b );
    progress += b.length;
    reportProgress();
    return ret;
    }
    
    /**
    * Reads up to len bytes of data from this input stream into an
    array of
    * bytes.
    */
    public int read( byte[] b, int off, int len ) throws IOException
    {
    int ret = super.read( b, off, len );
    progress += len;
    reportProgress();
    return ret;
    }
    
    /**
    * Skips over and discards n bytes of data from this input stream.
    *
    */
    public long skip( long n ) throws IOException
    {
    long ret = super.skip( n );
    progress += n;
    reportProgress();
    return ret;
    }
    
    // -------------------------- OTHER METHODS
    --------------------------
    
    /**
    * report the progress to the user
    */
    private void reportProgress()
    {
    // this is a dummy routine. A real version would send an event
    // to a progress meter.
    System.out.println( progress );
    }
    
    // --------------------------- main() method
    ---------------------------
    /**
    * test driver
    *
    * @param args arg[0] is UTF-8 filename to read
    */
    public static void main( String args[] )
    {
    try
    {
    // O P E N
    FileInputStream fis = new FileInputStream( new File( args[
    0 ] ) );
    TestProgessFilter tpfis = new TestProgessFilter( fis );
    InputStreamReader eisr = new InputStreamReader( tpfis,
    "UTF-8" );
    BufferedReader br = new BufferedReader( eisr, 400/*
    buffsize */ );
    
    // R E A D
    while ( true )
    {
    if ( br.readLine() == null )
    {
    // line == null means EOF
    break;
    }
    }
    
    // C L O S E
    br.close();
    }
    catch ( Exception e )
    {
    System.err.println( e );
    e.printStackTrace( System.err );
    }
    }
    }
    --
    Roedy Green Canadian Mind Products
    The Java Glossary
    http://mindprod.com
- 15
  - How to Escape a Single Quote in Java 1.5 javax.xml.xpath.* ?Hi everybody,
    
    How to escape a single quote in java 1.5 javax.xml.xpath XPath queries?
    Eg. meta[@name='Tom Jastrzebski's question']
    I have tried numerous approaches that typically work but none of them did.
    Does anybody KNOW how to do it?
    
    Thanks in advance.
    Tom
- 15
  - I write Tic-Tac-Toe in JavaThis is the most sophisticated game known to mankind and I'm not sure
    if Java is good enough for it, but I'm trying anyway.
- 15
  - R: JTable and db connectionThere is a good example in JTable example ad www.sun.com. By the way, it is
    based on the idea of copying all the records in a Vector array, and then
    send all to the JTable...
    IMHO this isn't a good approach, but it is a good example to understand the
    JTable
    
    Bye
    
    Giuseppe
    
    Liguori Ferdinando <email***@***.com> wrote in message
    bhl1va$55u$email***@***.com...
    >
    > Could you help me to definy a trouble.
    > I wish see data retring db connection in a JTable.
    > Could you mailing an example.
    > Thanks.
    >
    >
- 15
  - Just a Great Big Scrollable LineHello,
    I am a bit new to java and the java swing GUI.
    I am writing a JApplet.
    What I am trying to do is draw a line (say from (0, 0) to (1000, 1000)) and
    have the applet supply automatic scrollbars so that the user can see the
    whole line (sounds stupid - I know, but its a step in my direction).
    Anyway, I tried to inherit from a JLabel, change the inherited comopnent's
    paintComponent method to draw a line and put the inherited component in a
    JScrollPane. However, this only resulted in a Line which was only partially
    seen and no scrollbars. Moreover, I discovered that if I just add text to
    my label with the setText method then I get auto scrollbars if I make the
    applet smaller than the text size. This means that the setText method is
    doing something that defines it's boundaries for the JScrollPane to react
    to. So, my question is: How do I tell the JScrollPane that my inherited
    JLabel is 1000x1000 (and not just the size of the text)?
    Thanks,
    Aviv.
- 15
  - Java to C++ converterHi,
    I am looking for Java to C++ converter tool. Any existing tool available?
    Thanks for your help in advance.

Author

Message

loris_p

Posted: 2008-6-11 5:46:00

Top

java-programmer, How to get current jar path Hi! I'm working on an application that should run on an usb pen using
an embedded Derby DB. I need the DB to be on the USB pendrive with the
application.
Pen filesystem should look like this:

/
- application/
- application.jar
- lib/
- embeddedDB

using "user.dir" system property i get the path from where the jar has
been launched, while I need the path where the jar is. How can I do?

loris_p

Posted: 2008-6-11 6:03:00

Top

java-programmer >> How to get current jar path I solved using property java.class.path and checking if the jar
exists.
Bye.

EJP

Posted: 2008-6-11 11:02:00

Top

java-programmer >> How to get current jar path loris_p wrote:
> I need the path where the jar is. How can I do?

Class.getProtectionDomain().getCodeSource().getLocation()

Roedy Green

Posted: 2008-6-11 12:39:00

Top

java-programmer >> How to get current jar path On Tue, 10 Jun 2008 14:46:15 -0700 (PDT), loris_p
<email***@***.com> wrote, quoted or indirectly quoted someone
who said :

>using "user.dir" system property i get the path from where the jar has
>been launched, while I need the path where the jar is. How can I do?

see http://mindprod.com/jgloss/wherejars.html
--

Roedy Green Canadian Mind Products
The Java Glossary
http://mindprod.com

Index ‹ java-programmer

Next
- 1
  - Java GSM encoding from micHi
    
    I'm trying to encode a microphone stream into GSM using
    org.tritonus.lowlevel.gsm.Encoder but I am receiving just static noise -
    I've checked the raw PCM output and it's fine. Is there anything obvious
    that's missing here?
    Thanks
    
    __________________________
    The mic is opened as:
    
    AudioInputStream ais=null;
    
    DataLine.Info info_mic = new DataLine.Info(TargetDataLine.class,
    new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, 8000.0f, 16, 1, 2,
    8000.0f, false)
    );
    
    TargetDataLine mic = (TargetDataLine) AudioSystem.getLine(info_mic);
    mic.open();
    mic.start();
    
    ais = new AudioInputStream(mic);
    
    _____________________
    
    And the GSM frame encoder is:
    
    /*------*/
    byte [] gsmframe(AudioInputStream ais){
    
    byte [] encd = new byte[33];
    
    try{
    
    byte [] b = new byte[320];
    
    ais.read(b,0,b.length);
    
    DataInputStream di = new DataInputStream(new ByteArrayInputStream(b));
    
    short [] buf = new short[160];
    
    short j=0;
    
    for(int k=0; k<buf.length; k++){
    j=di.readShort();
    buf[k]=j;
    }
    
    org.tritonus.lowlevel.gsm.Encoder enc = new
    org.tritonus.lowlevel.gsm.Encoder();
    enc.encode(buf, encd);
    
    }catch(Exception e){
    System.out.println("error with microphone reading "+e);
    return null;
    }
    
    return encd;
    
    }
    /*-------*/
- 2
  - struts form population from an object model...flangelli wrote:
    <snip>
    > I have a business object model with attributes throughout that are
    > mapped to different form beans. Every time that a form bean (jsp) is
    > returned to the user's browser, I need to have a place to access my
    > object model to retrieve the data from and populate the bean before it
    > is displayed. So far it seems that the only time an action class is
    > given "command" is AFTER the form submission, I need control on a page
    > by page basis to retrieve the values from the object model into the
    > bean so the jsp can render the beans values.....anyone had a problem
    > similar to this? Thanks in advance - Flangelli
    
    There's nothing which "requires" you to forward to a JSP; you could
    just as easily forward to an action. The hitch here is that the
    ActionForm will be populated according to the request parameters if
    you just perform a forward. The solution is simply to specify
    redirect="true" in the forwarding action so that the request
    parameters get lost.
    Just be careful in your validate method when using this mechanism:
    you're users will be irked if the first time they see a page it
    contains all manner of error messages. Since you often provide a
    reset button on a form, the smart way to approach the situation is
    to hold off generating errors if all form fields are blank (or
    have the default value).
    If this doesn't make perfect sense then repost and I'll dig up
    some sample code. Or contact me off-line.
- 3
  - extract numbers from picture?is this called pattern matching or AI in java? how can you extract a number
    that is on a jpeg or bmp/gif/tiff ? is there any java package doing this?
    
    thanks
- 4
  - Mp3 converter to WavHi,
    
    I just need to convert a mp3 file to the Wav format.
    Is there any free package existing, or do i have to write my own program ?
    In that case, do you know any link that could help me to understand how to
    do this ?
    
    Thanks !
- 5
  - Re:Correct use of exceptionsWhen we talk about exception, it means that in some situation which we think
    that it should works this way, but it isn't. For example, when we write
    something to connect to remote SMTP server, we assume that the remote server
    should be available but actually it is down... In this case, the exception
    happened... So we need the exception handling to show our error message to
    user and log the error.
    
    Hope this helps!
    
    Guoqi Zheng
    
    http://www.big8reader.com
- 6
  - Simple question for those who understand recursion well. Please help.I have a tree represented as a linked list of simple objects
    (nodeId/parentId pairs) where the root node is the 1st element in the
    list. The other nodes are in somewhat random order. The parentId refers
    to the parent node.
    
    I want to convert it into a list where the values are in pre-order.
    I.e., I want to get this list as follows: ABCDEFGHIJ (see graph below).
    I.e., get the 1st node, put in in the list. If it has children, go
    through them one by one, get their child nodes, then put the parent in
    the list, then the leftmost first, and go from there. I.e., so that
    it's ordered in my linked list like this by (letters represent nodeId):
    
    A
    / \
    B J
    / | \
    C H I
    |
    D
    /|\
    E F G
    
    I created the following recursive method but it does not work
    correctly. For example, it places the nodes A then B and then J into
    the list first, rather than getting to J after adding all the child
    nodes. "isOnTheList" checkes whether the item is already in the list.
    "getImmediateChildren" returns the list of immediate child nodes
    ordered by nodeId
    
    Note: the empty list is passed to the method and is populated with the
    result:
    
    public static void orderTree(List list, List treeList) {
    if(treeList == null || treeList.size() == 0)
    return;
    
    Node child = null; List children = null;
    
    for(int i = 0; i < treeList.size(); i++) {
    node = (Node) treeList.get(i);
    // get list of children for this node
    children = getImmediateChildren(node, treeList);
    
    // if the node is not yet on the list, add it
    if(! isOnTheList(node, list) )
    list.add(cat);
    
    // if it has children, recurse to add all other nodes
    if(children.size() > 0) {
    orderTree(list, children);
    }
    }
    }
    
    Any idea what the problem is?
    
    Thanks.
- 7
  - [Q] Saving imageI am looking for a solution to how to make a background image
    permanent in a Java application.
    
    My application can have a background image, but when it saves its
    file, the background image is not included in the saved file. Is there
    a convenient (or right) way to save a gif (or jpeg or png) image into
    an application file?
    
    Thanks in advance.
    
    Young-Jin
- 8
  - My bean doesn't APPEAR on my JSP page!Hi, All!
    
    I have this simple bean (below), and i make the .class using JBuilder 7.0.
    
    I tryed to insert this bean into my JSP page:
    
    <%@ page contentType="text/html; charset=windows-1251" %>
    <html>
    <head>
    <title>
    Jsp1
    </title>
    </head>
    <jsp:useBean id="bean0" scope="session" class="bean1.KivaHanTester" />
    <jsp:setProperty name="bean0" property="*" />
    <body>
    <h1>
    JBuilder Generated JSP
    </h1>
    </body>
    </html>
    
    BUT I CAN't see this bean, when i open my JSP (IExplorer + Apache).
    May be i need to init this bean, like init() or show() i don't know.
    
    Thanks.
    
    SOURCE CODE:
    
    package bean1;
    
    import java.awt.*;
    
    public class KivaHan extends Canvas {
    
    private String msg;
    private int width, height;
    
    public KivaHan () {
    this ("Coffee: 10 lira");
    }
    public KivaHan (String s) {
    this (s, 200, 200);
    }
    public KivaHan (String s, int width, int height) {
    msg = s;
    this.width = width;
    this.height = height;
    setForeground (Color.cyan);
    setFont (new Font ("Serif", Font.ITALIC, 24));
    setSize (getPreferredSize());
    }
    public void paint (Graphics g) {
    Dimension d = getSize();
    FontMetrics fm = g.getFontMetrics();
    int len = fm.stringWidth (msg);
    int x = Math.max (((d.width - len) / 2), 0);
    int y = d.height / 2;
    g.drawString (msg, x, y);
    }
    
    public Dimension getPreferredSize () {
    return new Dimension (width, height);
    }
    }
    
    package bean1;
    
    public class KivaHanTester extends java.applet.Applet {
    public void init () {
    add (new KivaHan());
    }
    }
- 9
  - Eclipse vs NetBeans vs Jbuilder under LinuxHello everyone,
    I've tried the above 3 IDEs in the last year and thought I might make some
    comments and ask for your thoughts. Just for interest sake and please don't
    start a Holy War ;-)
    
    I originally used netBeans for development, but switched over to Jbuilder
    because we where doing tomcat/struts development and my boss said it had
    better support. I didn't really get to use netBeans struts stuff but it did
    seem a bit weak in comparision.
    
    I would have thought Borland would have a great editor, but I find it very
    buggy in comparison to netBeans. Some of the things I have had problems
    with include the cursor not being moved when you click in the text area
    (this tends to screw up click and drag rearrangement of text or do it when
    you don't mean too), auto-formatting of code rearranging it until it won't
    compile, method parameter popups not always accessable, method parameter
    popups not able to show the names of parameters - only the type, and some
    others I can't remember right now.
    
    However, the struts support in JBuilder does seem to be better than netBeans
    and runs quite well. Over all the IDE also seems a little quicker and I
    quite like the way that you can have multiple projects open and flip
    between then with ease. netBeans doesn't seem to handle multiple projects
    as smoothly as JBuilder.
    
    I also tried Eclipse at home a couple of time in the last 6 months and at
    the moment I can't see why many people are using it. On both occasions I
    found also sorts of nasty bugs which tended to simple drive me nuts. The
    last time time I used it for example, I found that it would not run the
    code I had just edited. I.e. if I could load a project, made some changes
    and hit the run button, it would run the code without the changes included.
    In order to get the changes it, I had to explicitly do a save before each
    run. This sounds trivial but can get very annoying, both netBeans and
    JBuilder run the code you are editing, not the last saved code.
    
    Eclipse also seemed to have a strange concept of projects. It looked rather
    good with being able to see multiple project trees at the same time until
    it came to running them. Then it appeared to separate the concept of
    running a projects from the projects themselves and I had to effectively
    re-setup again. I also found that if I had en error in one project, it
    would fail the compile even if I was in another project. So whilst I could
    have multiple projects open at a single time, it seemed to have trouble
    understanding which projects I was in and what it was to compile. This
    resulted in me having to unload/reload projects on a regular basis. I also
    remember not being that happy with it's editor either, I can't remember
    exactly why right now.
    
    So, I would have to say that at the moment, I would tend to use netBeans for
    general development, JBuilder for struts and Eclipse not at all.
    
    --
    cio
    Derek
- 10
  - batch update as a single transactionHi,
    
    I'm doing a JDBC batch update, writing several thousand rows to a single
    table. As I understand it a batch update can partially succeed, so some of
    my rows might get written and some not. I'd like the batch update to either
    fully succeed or completely fail, commit or rollback in other words. Is that
    easy to do? I'm pretty new at this.
    
    Thanks,
    John
- 11
  - Struts and AA based on a database
    Hello:)
    
    I have a question concerning authentification/authorization and
    elements visibility on a Web page in Struts. How to manage the
    visibility of control elements in a Struts-based application? The
    information about users should be stored in a database and not in XML
    configuration files. How to use role based or/and function based
    authorization system and how to retrieve the rights from a database and
    store them in the Principal object? The application is mantained within
    Tomcat application server. So, how to do this? Or, being more precise,
    is there any open-source library which provides such a functionality or
    should I develop everything from scratch? Do you have some examples for
    such stuff?
    
    best regards,
    Ania
- 12
  - package and jar filesHi,
    
    I am new to Java. I hope someone can give me a hint.
    
    What is the difference between package and jar files and do you use them ?
    
    thanks
    
    John
- 13
  - How do i do if-else condition in Struts ?How do i do if-else condition in Struts ?
    
    logic:equal does not do it . how struts tag could be used in the JSP
    page for an if-else condition ?
    
    how to do it ?
    
    Can anybody provide an example ?
- 14
  - jtreetabledear java professional,
    
    i want to create a grid using jtreetable. i find the sample code in
    the java.sun.com. but it is trickly to understand for me. do you
    have any code
    (simple code) for using the jtreetable ? i want to simple jtreetable
    example program with sample data. do you have the code please send me
    to my mail id
    email***@***.com.
    
    i also search in the net. but i only very less no. sample code related
    to jtreetable. that code also so tricky. do you know any link that
    contains simple
    jtreetable program?
    
    with regards,
    balamurugan se
- 15
  - Ant Javadoc failure when building help.I'm getting this error when trying to compile javadoc in ant from my
    buildxml:
    Any ideas?
    
    C:\umg\java\web\dbtest\WEB-INF\src\build.xml:64: Javadoc failed:
    java.io.IOException: CreateProcess: javadoc.exe -d
    C:\umg\java\web\dbtest\WEB-INF\doc\api -classpath
    C:\umg\java\web\lib\servlet-api.jar;C:\umg\java\web\lib\struts.jar;C:\umg\ja
    va\lib\umg-db.jar -sourcepath
    C:\umg\java\web\dbtest\WEB-INF\src -version -author
    java.com.umusic.ecrm.web.test error=2
    
    what's error=2????
    
    this is in my build.xml:
    
    <target name="javadoc"
    description="Generate JavaDoc API docs">
    <delete dir="./doc"/>
    <mkdir dir="./doc"/>
    <javadoc sourcepath="./src"
    destdir="./doc/api"
    packagenames="*"
    author="true"
    private="true"
    useexternalfile="yes"
    version="true"
    windowtitle="${project.title} API Documentation"
    doctitle="<h1>${project.title} Documentation (Version
    ${project.version})</h1>"
    bottom="Copyright © 2003">
    <classpath refid="compile.classpath"/>
    </javadoc>
    </target>