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DAO - best practices

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- 1
  - JTable size adjustment after addrow(), JScrollPaneHi all.
    
    Basically I'm doing the following:
    
    --snip--
    DefaultTableModel myTableModel=
    new DefaultTableModel(new String[] {"header1","header2"},0);
    JTable myTable=new JTable();
    myTable.setModel(myTableModel);
    
    TableScrollPane.setViewportView(myTable);
    --snap--
    
    When I do some myTable.addrow(...)s, the table is not resizing istself
    appropriately, resulting in data being "cut off" at the bottom.
    
    Does anyone know how to correctly adjust a table's preferred size (or
    whatever) after changing its contents to fit the new row count and thus
    making it usable in a ScrollPane?
    
    Many thanks in advance,
    
    Maximilian
- 2
  - mail to programmersinjava@googlegroups.commail to email***@***.com
- 3
  - Plottin a pixel...Hei!
    
    How to write a single pixel with Java applet and OPENGL...
    
    JariTapio/Helsinki/24may2005
    www.EuroJari.com
- 3
  - Anyone have any experience with WebLogic 8?Hello, I have just installed WebLogic 814 for Solaris 8. The machine
    is in a remote location, so I did all the installation remotely. My
    question is, how do I create a data source? I am used to WL 5 with the
    weblogic.properties file, but WL 8 seems different.
    Any help is greatly apprciated, - Dave
- 4
  - launch java(swing) applications from c/c++ on mac os xI want to launch a java application, which has lots of swing stuff in
    it, as also underlying algorithms running. I work on Mac OS X 10.3.8,
    and have Java 1.4.2_05(latest). I tried to launch AWT components like
    Frame,Panel, etc and it worked fine, but swing won't. I discovered that
    the code by default loads Java 1.3.1, and JNI 1.2, and hence no swing
    is supported. Can someone help me out? Thanks in advance. Here is a
    snippet of the native(c) code:
    
    JNIEnv* create_vm() {
    JavaVM* jvm;
    JNIEnv* env;
    JavaVMInitArgs args;
    jint jintVMStartupReturnValue;
    //JavaVMOption options[1];
    JavaVMOption options[15];
    
    args.version = JNI_VERSION_1_4;
    args.nOptions = 15;
    options[0].optionString =
    "-Djava.class.path=/Users/avisere12/Desktop";
    options[1].optionString =
    "-Dsun.boot.library.path=/System/Library/Frameworks/JavaVM.framework/Versions/1.4.2/Libraries";
    options[2].optionString = "-Xms16M";
    options[3].optionString = "-Xmx512M";
    options[4].optionString = "-Duser.dir=/Users/avisere12/Desktop";
    options[5].optionString =
    "-Djava.home=/System/Library/Frameworks/JavaVM.framework/Versions/1.4.2/Home";
    options[6].optionString =
    "-Djava.ext.dirs=/Library/Java/Extensions:/System/Library/Java/Extensions:/System/Library/Frameworks/JavaVM.framework/Versions/1.4.2/Home/lib/ext";
    
    options[7].optionString =
    "-Dsun.boot.class.path=/System/Library/Frameworks/JavaVM.framework/Versions/1.4.2/Classes/classes.jar:/System/Library/Frameworks/JavaVM.framework/Versions/1.4.2/Classes/ui.jar:/System/Library/Frameworks/JavaVM.framework/Versions/1.4.2/Classes/laf.jar:/System/Library/Frameworks/JavaVM.framework/Versions/1.4.2/Classes/sunrsasign.jar:/System/Library/Frameworks/JavaVM.framework/Versions/1.4.2/Classes/jsse.jar:/System/Library/Frameworks/JavaVM.framework/Versions/1.4.2/Classes/jce.jar:/System/Library/Frameworks/JavaVM.framework/Versions/1.4.2/Classes/charsets.jar";
    options[8].optionString = "-Djava.runtime.version=1.4.2_05-141.4";
    options[9].optionString =
    "-Djava.awt.graphicsenv=apple.awt.CGraphicsEnvironment";
    options[10].optionString =
    "-Djava.endorsed.dirs=/System/Library/Frameworks/JavaVM.framework/Versions/1.4.2/Home/lib/endorsed";
    options[11].optionString = "-Djava.vm.info=mixed mode";
    options[12].optionString = "-Djava.version=1.4.2_05";
    options[13].optionString = "-Djava.vm.version=1.4.2-38";
    options[14].optionString = "-Dawt.nativeDoubleBuffering=true";
    args.options = options;
    args.ignoreUnrecognized = JNI_TRUE;
    jintVMStartupReturnValue = JNI_CreateJavaVM(&jvm, &env, &args);
    
    return env;
    }
    
    void invoke_class(JNIEnv* env) {
    jclass helloWorldClass;
    jmethodID mainMethod;
    jobjectArray applicationArgs;
    jstring applicationArg0;
    
    helloWorldClass = env->FindClass("com/mypack/pack/MyJava");
    
    if(helloWorldClass == 0){
    printf("Class not found\n");
    fflush(stdout);
    }
    else{
    printf("Class found and about to be loaded\n");
    fflush(stdout);
    }
    
    mainMethod = env->GetStaticMethodID(helloWorldClass, "main",
    "([Ljava/lang/String;)V");
    
    applicationArgs = env->NewObjectArray(1,
    env->FindClass("java/lang/String"), NULL);
    applicationArg0 = env->NewStringUTF("yahoooooooo");
    
    env->SetObjectArrayElement(applicationArgs, 0, applicationArg0);
    
    env->CallStaticVoidMethod(helloWorldClass, mainMethod,
    applicationArgs);
    }
    
    int main(int argc, char **argv) {
    JNIEnv* env = create_vm();
    invoke_class( env );
    }
    Here is the error which I get, more so when i try to run JNI 1.4:
    
    2005-03-22 11:24:56.399 myapp[628] Apple AWT Java VM was loaded on
    first thread -- can't start AWT.
    Class not found
    Bus error
    
    I tried providing various optons as vm arguments, but got the same
    errors as above.
- 5
  - Thanks again sincerely Senator Barack Obama for your TagFrom: "Craig Oral Somerford" <email***@***.com>
    Date: Jul 20, 1:16 pm
    Subject: Fwd: Thank you Wal-mart... & From 2Barter's Google.Org
    To:"Mr Barack Obama {On YouTube?}" <email***@***.com>,
    Thank you Sincerely For you Tag Mr BarackObama
    http://my.barackobama.com/page/community/post/craigoralsomerford/CXWz
    "{2Barter's Google.Org}" http://my.barackobama.com
    From: 2Barter.net <email***@***.com>
    Date: Jul 7, 2007 10:58 PM http://www.2Barter.net
    Subject: Calling all Contractors
    To: "Mr Barack Obama" <email***@***.com>,
    From:"{2Barter's Google.Org}" <email***@***.com>
    Date: Jul 20, 2007 1:08 PM
    Subject: Thank you Wal-mart... & From 2Barter's Google.Org
    To:"{Steve Capus}" <email***@***.com>,
    Cc:http://www.youtube.com/watch?v=wFGG6AjzZI4
    Cc: Lee Scott Jr <email***@***.com>
    Bcc: DONALD J. TRUMP
    Welcome to Googlies new Jukebox
    http://www.youtube.com/watch?v=7reY8OyYmLI
    From: Craig oral Somerford <[email address]>
    Date: Jul 20, 2007 12:31 PM
    Subject: " Working in Faith is Fun "
    To: Mayor Rey Nagin <[email address]>, Lee Scott Jr <privacy@wal-
    mart.com>
    Cc:http://mail.google.com/mail/?
    disp=imgs&view=att&th=113e47b965b7b3b6
    From: [email address] <[email address]>
    Date: Jul 20, 2007 12:26 PM
    Subject: " Working in Faith is Fun "
    To: "2Barter's Google.Org" <[email address]>
    Cc: "{2Barter's Google.Org}" <[email address]>
    Friday July 19Th 2007
    
    Thank you
    Sincerely:
    For CLICKING in
    2Barter's Google.Org
    "{United States Contractors Offering Service}" <[email address]>,
    
    This Non-profit Is a A Non-profit for the
    " PEOPLE "
    
    ><> ><> ><>
    
    Enjoyhttp://groups.google.com/groups/search?q=2Barter's+Google.Org&qt_s=Se...
    And Join today it's free and fun.
    " Working in Faith is Fun "
    Thank you
    and may GOD Bless you.
    As HE has this Non-profit in-which was given to HIM in Faith ><>
    Sincerely:
    Craig Oral Somerford
    Founder of uscos2Barter
    Welcome
    "2Barter's Google.Org"
    United States Contractors Offering Service email***@***.com A
    Non-profit for the.
    http://www.youtube.com/watch?v=uYtnNk7xCRE
    " PEOPLE "
    In following my hearts calling it leads me to tell you to say
    welcome
    I see some-thing that i guess allot of people do not see.
    And that is a blessing from the storm.
    Let me tell you a little bit about me self if i may.
    You see all i have i gave up to GOD to this vary day.
    For all i had is now in GOD'S hands i have nothing left but HIM.
    No Car , ID , Income , House ,Wife Every-Thing is gone.
    Plus i have never been happier living in faith totally.
    >as i make my bed in SHEOL thou art with me .
    
    For in Not knowing what i will be doing up until the time i do it
    gives GOD all the time HE needs to work through me.
    And in doing so giving HIM all the GLORY found in it as well.
    The truth found in a Ethereal world we all live in
    And my faith in him is growing faster and faster on a daily bases.
    For HE is giving me guidance from my prayers through is SON.
    To show you ; and the world.
    That with out doughy HE is real.
    And have that doughty cast into the Ocean for good.
    Just like you see that HELL washed away.
    Right from the boat you see me on in this site in-which i gave back
    to
    HIM
    HIM who GOD.
    Are Father in Heaven who it be thy name.
    So to get back to what i mean ; in i see something that i feel allot
    of you don't see.
    and that being the blessing found in the wood laying all a muck down
    south in the Gulf Coast of are Country. For Behold it is overlaid
    with
    Gold and silver.
    Look in the Bible to see some answers to just what can happen when
    you
    wait on HIM for the answer
    A CKICK Away
    http://www.biblegateway.com/passage/?search=Habakkuk%202:19,20%20;&ve...
    " Behold, it is overlaid with gold and silver,
    Yet in it there is no breath at all.
    20 " But the LORD is in His holy temple.
    Let all the earth keep silence before Him."
    
    What we do is simple we pick up all the little pieces that are laying
    every were. And stock pile it for Manufacture.
    say at all the Libraries to start. And just a shoe box full.
    For then theo's well off or well to do people who wish to give Money
    to these Paper-weight-pen-holders.
    Ones lets say that are made just for these Donates in the Gluf Coast
    and New Orleans area in-which were they were made our collected
    at.People then who pay for them with this program could go through
    its
    fruition creating something of value big time for its monetary Value.
    Plus everyone who helped from the people how picked it up to the
    driver who drove it plus the plant.
    Who made particle board out of it.
    And with the scraps left over sent it then to have it then in-cased
    in plex-glass and made into that paper weight pen holder thanking the
    Donation given from that person who bought it and in faith allow
    blessing to come from it when being seen to all who see it on there
    desk.
    Plus they then can write there vision like i wrote mine.
    
    >From this blessing found in the storm and are Country's biggest
    
    natural disaster.
    Thank you GOD for this vision
    In " Jesus the Christ "
    Name ipray.
    Craig Oral Somerford
    17 July 2007
    Right Mr Google?
    THANK YOU
    SINCERELY
    Googlies new jukebox
    " Is lots ans lots of fun " the ABCs?
    &
    Enjoy http://i56.photobucket.com/albums/g173/Krazjays4209/SHIPPINGGUY.gif
    #1
    http://www.youtube.com/watch?v=5xfWBM6wS1U
    #2
    http://www.entheosweb.com/photoshop_templates/architecture.asp
    #3
    http://my.barackobama.com/page/community/post/craigoralsomerford/CXWz
    Thanks again sincerely Senator Barack Obama for your Tag
    Reply Reply to author Forward
    2Barter's Google.Org
    View profile
    More options Jul 21, 12:34 am
    From: "Craig Oral Somerford" <email***@***.com>
    Date: Jul 20, 1:16 pm
    Subject: Fwd: Thank you Wal-mart... & From 2Barter's Google.Org
    To:"Mr Barack Obama {On YouTube?}" <email***@***.com>,
    Thank you
    Sincerely
    For you Tag
    Mr BarackObama
    http://my.barackobama.com/page/community/post/craigoralsomerford/CXWz
    "{2Barter's Google.Org}" http://my.barackobama.com
    From: 2Barter.net <email***@***.com>
    Date: Jul 7, 2007 10:58 PM http://www.2Barter.net
    Subject: Calling all Contractors
    To: "Mr Barack Obama" <email***@***.com>,
    From:"{2Barter's Google.Org}" <email***@***.com>
    Date: Jul 20, 2007 1:08 PM
    Subject: Thank you Wal-mart... & From 2Barter's Google.Org
    To:"{Steve Capus}" <email***@***.com>,
    Cc:http://www.youtube.com/watch?v=wFGG6AjzZI4
    Cc: Lee Scott Jr <email***@***.com>
    Bcc: DONALD J. TRUMP
    Welcome to Googlies new Jukebox
    http://www.youtube.com/watch?v=7reY8OyYmLI
    
    From: Craig oral Somerford <[email address]>
    Date: Jul 20, 2007 12:31 PM
    Subject: " Working in Faith is Fun "
    To: Mayor Rey Nagin <[email address]>, Lee Scott Jr <privacy@wal-
    mart.com>
    Cc:http://mail.google.com/mail/?
    disp=imgs&view=att&th=113e47b965b7b3b6
    From: [email address] <[email address]>
    Date: Jul 20, 2007 12:26 PM
    Subject: " Working in Faith is Fun "
    To: "2Barter's Google.Org" <[email address]>
    Cc: "{2Barter's Google.Org}" <[email address]>
    
    Friday July 19Th 2007
    
    Thank you
    Sincerely:
    For CLICKING in
    2Barter's Google.Org
    "{United States Contractors Offering Service}" <[email address]>,
    
    This Non-profit Is a A Non-profit for the
    " PEOPLE "
    
    ><> ><> ><>
    
    Enjoyhttp://groups.google.com/groups/search?q=2Barter's+Google.Org&qt_s=Se...
    And Join today it's free and fun.
    " Working in Faith is Fun "
    Thank you
    and may GOD Bless you.
    As HE has this Non-profit in-which was given to HIM in Faith ><>
    Sincerely:
    Craig Oral Somerford
    Founder of uscos2Barter
    Welcome
    "2Barter's Google.Org"
    United States Contractors Offering Service email***@***.com A
    Non-profit for the.
    http://www.youtube.com/watch?v=uYtnNk7xCRE
    " PEOPLE "
    In following my hearts calling it leads me to tell you to say
    welcome
    I see some-thing that i guess allot of people do not see.
    And that is a blessing from the storm.
    Let me tell you a little bit about me self if i may.
    You see all i have i gave up to GOD to this vary day.
    For all i had is now in GOD'S hands i have nothing left but HIM.
    No Car , ID , Income , House ,Wife Every-Thing is gone.
    Plus i have never been happier living in faith totally.
    >as i make my bed in SHEOL thou art with me .
    
    For in Not knowing what i will be doing up until the time i do it
    gives GOD all the time HE needs to work through me.
    And in doing so giving HIM all the GLORY found in it as well.
    The truth found in a Ethereal world we all live in
    And my faith in him is growing faster and faster on a daily bases.
    For HE is giving me guidance from my prayers through is SON.
    To show you ; and the world.
    That with out doughy HE is real.
    And have that doughty cast into the Ocean for good.
    Just like you see that HELL washed away.
    Right from the boat you see me on in this site in-which i gave back
    to
    HIM
    HIM who GOD.
    Are Father in Heaven who it be thy name.
    So to get back to what i mean ; in i see something that i feel allot
    of you don't see.
    and that being the blessing found in the wood laying all a muck down
    south in the Gulf Coast of are Country. For Behold it is overlaid
    with
    Gold and silver.
    Look in the Bible to see some answers to just what can happen when
    you
    wait on HIM for the answer
    A CKICK Away
    http://www.biblegateway.com/passage/?search=Habakkuk%202:19,20%20;&ve...
    " Behold, it is overlaid with gold and silver,
    Yet in it there is no breath at all.
    20 " But the LORD is in His holy temple.
    Let all the earth keep silence before Him."
    
    What we do is simple we pick up all the little pieces that are laying
    every were. And stock pile it for Manufacture.
    say at all the Libraries to start. And just a shoe box full.
    For then theo's well off or well to do people who wish to give Money
    to these Paper-weight-pen-holders.
    Ones lets say that are made just for these Donates in the Gluf Coast
    and New Orleans area in-which were they were made our collected
    at.People then who pay for them with this program could go through
    its
    fruition creating something of value big time for its monetary Value.
    Plus everyone who helped from the people how picked it up to the
    driver who drove it plus the plant.
    Who made particle board out of it.
    And with the scraps left over sent it then to have it then in-cased
    in plex-glass and made into that paper weight pen holder thanking the
    Donation given from that person who bought it and in faith allow
    blessing to come from it when being seen to all who see it on there
    desk.
    Plus they then can write there vision like i wrote mine.
    
    >From this blessing found in the storm and are Country's biggest
    
    natural disaster.
    Thank you GOD for this vision
    In " Jesus the Christ "
    Name ipray.
    Craig Oral Somerford
    17 July 2007
    Right Mr Google?
    THANK YOU
    SINCERELY
    Googlies new jukebox
    " Is lots ans lots of fun " the ABCs?
    &
    Enjoy http://i56.photobucket.com/albums/g173/Krazjays4209/SHIPPINGGUY.gif
    #1
    http://www.youtube.com/watch?v=5xfWBM6wS1U
    #2
    http://www.entheosweb.com/photoshop_templates/architecture.asp
    #3
    http://my.barackobama.com/page/community/post/craigoralsomerford/CXWz
    Thanks again sincerely Senator Barack Obama for your Tag
- 6
  - Help needed on the Java policyHi,
    
    Michael Koch said:
    > I'm currently working on a proposal for cleaning up the virtual package
    > chaos. Please give me some more days for this.
    
    Fair enough, let's consider as a warm up for the discussion that will come
    once you'll show your proposal ;-)
    
    Thanks, Eric
    
    --
    You don't need to CC me on debian-java, debian-mentors and
    pkg-java-maintainers.
    Please CC me on other Debian lists.
    
    --
    To UNSUBSCRIBE, email to email***@***.com
    with a subject of "unsubscribe". Trouble? Contact email***@***.com
- 6
  - changing Reader midstreami have what seems to be a fairly common problem, but i can't seem to find an
    answer... i have a java program which opens a connection to a webpage and
    seeks to read the webpage in. if the charset is defined in the header, then
    no problem - i simply set up my InputStreamReader using the correct Charset
    and away i go. but if the charset is defined in a META tag, then i want to
    be able to recognize that.
    
    a good example of why this is important: Yahoo! Japan uses EUC-JP encoding,
    and specifies it in the header. Excite Japan uses Shift_JIS encoding, and
    specifies it in the META tag.
    
    here's some pseudocode:
    
    URL url = new URL(webpage);
    URLConnection conn = url.openConnection();
    if (conn.contentType() != null)
    charset = getCharset(conn.contentType()); // yay!
    else
    charset = ISO-8859-1; // default
    
    InputStream = conn.getInputStream();
    BufferedReader reader = new BufferedReader(new
    InputStreamReader(in,charset));
    while (get data from reader) {
    if (data is META tag && content-type specifies a new charset) {
    reader = new BufferedReader(new InputStreamReader(in,newCharset));
    // this is the problem
    }
    }
    
    this, unfortunately, does not seem to work. is there a better (i.e.,
    standard) way to do this?
    
    thanks!
    
    daniel
- 10
  - Shootout: the benchmarks game ... continues.On Wed, 30 Apr 2008 08:00:38 -0700 (PDT), Isaac Gouy
    <email***@***.com> wrote:
    
    >You've spent 10 days making untrue claims:
    
    No, you are wrong. There is no -Xms when you click on show tab from
    the main page. You know that very well. Why waste time on quibbling?
    
    >Why don't you go through all...
    
    Let's continue. The only thing changed is my OS (Vista) and computer
    which is now 3 core phenom. Also, instead of > /dev/null on cygwin, I
    will use > \Null (since that seems to be 200 times faster on windows).
    benchmark: fasta
    java version:
    http://shootout.alioth.debian.org/gp4/benchmark.php?test=fasta&lang=java&id=2
    C++ version
    http://shootout.alioth.debian.org/gp4/benchmark.php?test=fasta&lang=gpp&id=4
    
    As a great example of c++ portability, this doesn't even compile with
    my version of g++ (mingw), so I will use cygwin to compile. gcc
    version 3.4.4 (cygming special)
    
    g++ -pipe -O3 -fomit-frame-pointer -mfpmath=sse -msse2 fasta.cpp -o
    fasta.exe
    
    jc -inline+ fasta (jet)
    
    N 250,000 2,500,000 25,000,000
    g++ 0.166s 0.954s 8.884s
    java 0.297s 1.347s 11.699s (-Xms64m -server)
    jet 0.420s 1.701s 14.602s
    
    (note this guy uses -Xbatch flag everywhere. I have to see how that
    helps anywhere. It's just slightly slower with -Xbatch flag if
    anything).
    
    HotSpot VM is faster than native Jet compiler once again? That's three
    in a row. g++ is only slightly faster, not 50 or 100 times as some
    think.
- 10
  - getting hostname from NT machine via CitrixHi All,
    
    I don't know if any one can help or has any ideas about this.
    
    We are writing a web based application which will run on a Unix box. It will
    be accessible only via a login to Citrix from client machines. We have
    achieved a transparent login to the application (running in Tomcat) using an
    LDAP lookup. What we are stuck on is the following. We would like to be able
    to get the hostname of the NT machine which is logging on. Someone has
    suggested that we may be able to do this using a signed applet. I have no
    experience with Applets at all & wondered if any one knows if this is
    achievable or has accomplished anything similar? Any other ideas on how we
    might do this?
    
    Many thanks
    
    --
    -P
    "Programs that are hard to read are hard to modify.
    Programs that have duplicated logic are hard to modify.
    Programs with complex conditional logic are hard to modify"
    
    ( Kent Beck)
- 10
  - mailing.database.mysql-internals, mailing.database.mysql, mailing.database.mysql-java, comp.lang.java.programmerif you check the store requirements of column types in mysql,
    
    http://mysql.azc.uam.mx/doc/en/Storage_requirements.html
    
    You will see advertised that, for example, for storing a TINYINT they
    use a byte, but when you create a table using the different types of
    data:
    
    CREATE TABLE mysql_data_types (
    iTINYI TINYINT,
    iTINYINTU TINYINT UNSIGNED,
    iSMALLI SMALLINT,
    iSMALLIU SMALLINT UNSIGNED,
    iMEDIUMI MEDIUMINT,
    iMEDIUMIU MEDIUMINT UNSIGNED,
    iI INT,
    iIU INT UNSIGNED,
    lBIGINT BIGINT,
    lBIGINTU BIGINT UNSIGNED,
    fFLOAT FLOAT,
    fFLOATX24 FLOAT(24),
    fFLOATX25 FLOAT(25),
    dDOUBLE DOUBLE,
    dDOUBLEP DOUBLE PRECISION,
    dREAL REAL,
    dDECIMALM1D0 DECIMAL(1,0),
    dDECIMALM1D1 DECIMAL(1,1),
    dDECIMALM1D2 DECIMAL(1,2),
    dNUMERICM1D0 NUMERIC(1,0),
    dNUMERICM1D1 NUMERIC(1,1),
    dNUMERICM1D2 NUMERIC(1,2),
    CHARM16 CHAR(16),
    CHARM16B CHAR(16) BINARY,
    aVARCHARM255 VARCHAR(255),
    aTINYTEXT TINYTEXT,
    aTEXT TEXT,
    aMEDIUMTEXT MEDIUMTEXT,
    aLONGTEXT LONGTEXT,
    bVARCHARM255 VARCHAR(255) BINARY,
    bTINYBLOB TINYBLOB,
    bBLOB BLOB,
    bMEDIUMBLOB MEDIUMBLOB,
    bLONGBLOB LONGBLOB,
    tYEAR YEAR,
    tTIME TIME,
    tDATE DATE,
    tTIMESTAMP TIMESTAMP,
    tDATETIME DATETIME);
    
    However when you use JDBC to query the column definitions, see:
    
    http://java.sun.com/j2se/1.4.2/docs/api/java/sql/DatabaseMetaData.html#getColumns
    
    with code like:
    
    Cx = DriverManager.getConnection(aJDBCP + aTblDB, aUsr, aPW);
    DBMD = Cx.getMetaData();
    // __
    RSFlds = DBMD.getColumns(aTblDB, null, aTblNm, "%");
    // __
    while(RSFlds.next()){
    ++itFldIx;
    aFldNm = RSFlds.getString(4);
    // __
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    __ __
    | \/ |__ _Apache__ ___
    | |\/| / _` \ V / -_) ' \ ~ intelligent projects ~
    |_| |_\__,_|\_/\___|_||_| v. 1.0.1
    
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    at org.apache.maven.cli.App.doMain(App.java:488)
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    at com.werken.forehead.Forehead.run(Forehead.java:551)
    at com.werken.forehead.Forehead.main(Forehead.java:581)
    BUILD SUCCESSFUL
    Total time: 6 seconds
    Finished at: Mon Nov 22 12:20:01 CET 2004
    
    Could someone help ?
    
    Thank you.

Author

Message

Posted: 2006-4-18 16:26:00

Top

java-programmer, DAO - best practices Hi All,

I know this is a little bit OT

Suppose I have 2 tables customers and products, customer can buy many
products, product can be bought by many customers - typical n:m
relationship so 3rd table is a must: i.e. purchases

So I need 3 DAO: ProductDAO, CustomerDAO and PurchaseDAO.

How do you deal with i.e. reports - table joins, left joins or
statistics (group by, max, min etc)?

do you create DAOs for that? (especially table joins - probably not)

raports and statistics from i.e. 7 tables can be only read-only, so
insert, update, delete methods
are inadequate.

thanks in advance for shedding some light on this
best regards
R

PremKumar

Posted: 2006-4-18 17:18:00

Top

java-programmer >> DAO - best practices Hi,
Yep, 3 tables needed; for customer details, product details and
purchase details.
No need for U to have 3 DAO's

In one DAO you can get all the detials U need like;
pick list for products
pick list for customers
for repo's etc.,

Cheers

richardsosborn@gmail.com

Posted: 2006-4-27 21:40:00

Top

java-programmer >> DAO - best practices you need to change your thinking. DAO is an intersection between DB
and the java code you're writing. you should think if it as the person
coming into it after you for the first time will see it.

your method names, as the last poster said, should start to crossover
from describing the business action performs, to which database
interaction needs to take place. ("pickProductList()" as opposed to
"pickListFromProductItemsTable()") this is the point of DAO.

if you want another layer of abstraction, i've seen projects which
start to describe which queries or database actions will be performed
(IE "callPickListForProductItems()"). and even then contain these in a
specialized class for each database vendor, in case your application
would re-platform.

but the pattern serves you, not the other way around. be aware of the
future and utilize as much or as little as you think you will need.

Index ‹ java-programmer

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- 6
  - JDBC and threadsHi,
    I have a question on threads, probably very basic but I'm having a
    hard time figuring it out. I've created a little test app for
    experimentation on this subject.
    The app shows a JTable that is filled with data from a database. The
    user can change the data in the JTable wherupon the JTable passes this
    data to the database. Now this part I would like to do in a different
    thread, so that the UI is not slowed when communication with the
    database is taking place. To do this I've created a class has a
    private class that extends Thread. The run() method of this class is
    then supposed to do the JDBC stuff like creating a statement and
    executing the update.
    However, here I have a problem. The run() method cannot throw an
    SQLException. I would like the exception to be thrown rather than
    caught in the run() method, so that I can deal with the exception in
    my main thread and have the UI respond accordingly (meaning: do not
    update the tableModel with the newly entered value).
    
    Does anyone have any suggestions for me how I could implement this in
    a different fashion? The aim is to get the JDBC stuff to run in a
    different thread than the UI does.
    
    Thanks very much, Jonck
- 7
  - Pls Help!!!Hi All,
    
    I want to write conditional regular expression in Java/J2EE.
    
    Any sample example will be preferrable. In Dot Net , conditional regex
    are working properly but i want to do it in java/J2EE.
    
    Like i have following regex in dot net which i want to write in java/
    J2EE. :-
    
    (([<]title).*(\bcontract(s)?\b|\border(s)?\b|\bsign(s|ed)?\b|
    \bw[io]n(s)?\b).*(title[>]))(?=(?>(.|\n)*?([<]body).{1,1000}?(\b(re)?
    new\b|\bpen(s)?\b).{1,100}?(\bdeal(s)?\b)))
    
    Any help will be truely appriciated.
    
    Thanks in advance.
- 8
  - generate private key from a exist fileHi
    
    i want to generate a private key from a exist file. i tried this but it
    dosen't works!
    
    ---------Code--------------
    
    FileInputStream keyfis = new FileInputStream("keyCarlaSchaffner.pem");
    //"keyCarlaSchaffner.der"
    byte[] encKey = new byte[keyfis.available()];
    keyfis.read(encKey);
    keyfis.close();
    
    X509EncodedKeySpec privKeySpec = new X509EncodedKeySpec(encKey);
    
    KeyFactory kf = KeyFactory.getInstance("RSA");
    PrivateKey pk = kf.generatePrivate(privKeySpec);
    
    ---------Code end ----------
    
    i have the private key file in pem and der encoded version, but both didn't
    work.
    
    PEM :
    
    -----BEGIN RSA PRIVATE KEY-----
    Proc-Type: 4,ENCRYPTED
    DEK-Info: DES-EDE3-CBC,F836EA29BA0C7925
    
    ....
    ...
    ...
    -----END RSA PRIVATE KEY-----
    
    DER: no readable
    
    the exception is:
    --------------------------------
    
    java.security.spec.InvalidKeySpecException: Key spec not RSA.
    at
    com.sun.net.ssl.internal.ssl.JSA_RSAKeyFactory.getPrivateKeyData(DashoA6275)
    at
    com.sun.net.ssl.internal.ssl.JS_KeyFactory.engineGeneratePrivate(DashoA6275)
    at java.security.KeyFactory.generatePrivate(KeyFactory.java:237)
    --------------------------------
    
    has anyone a idea?
    
    thanks carla
- 9
  - jar helphi
    i have been trying to make a jar file for the following files
    
    hello.java
    hello.class
    with the following command
    
    jar cf hello.jar hello.*
    
    it is created and with
    jar tf hello.jar
    
    i am able to see the list of files which is in this case
    META-INF/
    META-INF/MANIFEST.MF
    hello.class
    hello.java
    
    but it doesn't run with
    java -jar hello.jar
    
    following error appears
    Failed to load Main-Class manifest attribute from
    hello.jar
    
    i tried to fix it with
    
    jar cfm hello.jar mymainclass hello.*(after creating mymainclass with the
    entry Main-Class: path.hello)
    
    to no avail!
    and another thing is although the dir META-INF is shown as above it is not
    created in the folder..where is it created??
    
    help please
    
    Greetingz
    Sunil
- 10
  - Irony (not that you'll see this subject anyways)On Aug 4, 11:09 am, Joshua Cranmer <email***@***.com> wrote:
    > In terms of off-topic-ness, the first posts started delving into
    > implementing operator overloading, which then started into a discussion
    > over exponentiation operators -- both of which are mildly on-topic. Then
    > came a response by Twisted saying that COBOL was responsible for a lot of
    > Y2K bugs.
    
    Which was a perfectly "on-topic" reply to the previous post. It's
    called topic drift. Get used to it.
    
    [snip remainder]
    
    Stop blaming me. It is never correct to blame me; leave me in peace.
- 11
  - Major enhancements to Swing Drag and Drop in MustangHi Everyone,
    
    If you happen to be interested, I've just published a blog introducing
    the major enhancements made to Swing Drag and Drop for Mustang. You can
    find it here:
    
    http://weblogs.java.net/blog/shan_man/archive/2006/01/first_class_dra.html
    
    I hope you have a chance to try out one of the recent builds. And of
    course, feel free to post any questions or comments at the blog.
    
    Thank you, and all the best!
    Shannon
- 12
  - Final field & custom serialized formatI have a class which has a single field:
    
    private final File nameFile;
    
    When serializing it, I want to save it as a String, rather than a File.
    This will allow me to better check for platform incompatibilities during
    deserialization.
    
    I can serialize it like so:
    
    private transient final File nameFile;
    
    private void writeObject(ObjectOutputStream out) throws IOException
    {
    out.defaultWriteObject();
    out.writeObject(nameFile.getPath());
    }
    
    A straightforward approach to deserialization won't work, however, for
    the obvious reason that I won't be able to set nameFile to the File I
    construct from my deserialized String.
    
    I can't be the first person to run into this. What have others done in
    this situation?
    
    Thanks!
    
    --
    ========================================================================
    Ian Pilcher email***@***.com
    ========================================================================
- 13
  - Which Compiler?Hi. Is there another good free compiler (besides the JDK) that is
    recommended? I would like to hear from those who have used it if there
    is. Thanks, Steve
- 14
  - NetBeans to abandon Java ? It makes you wonder...Today I was directed to a satisfaction survey on the NetBeans website
    after starting NetBeans 6. I expresses my disdain about the product,
    said that the current setup does not allow me to get my work down (I'm
    still using NB 5.5.1 for my Java development) but that I have to admit
    that the whole documentation as well as the overall speed is satisfying.
    
    Then I got curious to the end results of the survey, couldn't find any,
    but I did stumble upon this page with lots of success stories about
    excited developers who've (re)discovered NetBeans:
    http://www.netbeans.org/servlets/NewsItemView?newsItemID=1179.
    
    After reading that whole page I was basically left with one simple
    question: "And what about Java?".
    
    I quote from the page: "Developers continue to rave about NetBeans 6.0
    IDE features--its support for Ruby and C++, the debugger, the easy
    installation process and more.". There isn't much changed with regards
    to the installation, NB5.5.1 also has a good debugger and then what ?
    
    Reading on there are a few success stories. Funny though how those
    reflect on the IDE as a whole, RoR or C++. Reading on again we see 4
    more stories: "Amazing RoR support", "Cleaner, slimmer, more focused IDE
    than Eclipse" and finally "A lot of features".
    
    Cool. SO like, why am I wondering why I don't read so many success
    stories which are fully related to Java ?
    
    Heck, here I am utilizing NB6 as we speak to debug a PHP powered
    website, and its doing a pretty good job as well, apart from the
    sometimes very annoying delays its causing me. But thats a minor issue,
    and only happening very sporadically.
    
    Still... Is NetBeans shifting their focus ? I have to wonder. It would
    explain something about my horror experiences where (IMO) important Java
    related features like autocomment (javadoc administration) and pattern
    support (javabean administration) were removed. While I don't consider
    NB6 to be a decent Java editor I have to admit its doing well on PHP.
    Errr... I think I'll stop here :P
    
    With kind regards,
    
    Peter
- 15
  - java code compressioni'm writing an applet which is growing a little out of control, and i'm
    trying to cut down on the size of the final applet without reducing
    functionality. is there a way to strip all excess symbols out of the applet
    at compile time, or munge the internal names so that they're shorter?
    coming from a C++ background, i have all of these nice, long explanatory
    names for my constants - which end up taking an absurd amount of space.
    
    any help would be appreciated!
    
    daniel