java-programmer >>JDK1.5 with Jboss

JDK1.5 with Jboss

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- 2
  - Java In A Nutshell, 5th Edition moreWith more than 700,000 copies sold to date, Java in a Nutshell from
    O'Reilly is clearly the favorite resource amongst the legion of
    developers and programmers using Java technology. And now, with the
    release of the 5.0 version of Java, O'Reilly has given the book that
    defined the "in a Nutshell" category another impressive tune-up.
    
    In this latest revision, readers will find Java in a Nutshell, 5th
    Edition does more than just cover the extensive changes implicit in
    5.0, the newest version of Java. It's undergone a complete makeover--in
    scope, size, and type of coverage--in order to more closely meet the
    needs of the modern Java programmer.
    
    more http://www.cdbook.cn/book.asp?id=676
- 4
  - How to start compiling a big package directory tree ?I downloaded a java source of a tool which is spread over multiple (40-50) *.java files
    which are located in different sub directories according to their package name.
    
    Unfortunately no further instructions (e.g. Ant script) are available.
    However the source should be compileable without errors.
    
    How do I start ?
    
    Which class should I compile first ?
    
    For example I found a "main()" method in java file SomeGUI.java
    
    When I switch now to the base directory of package:
    
    D:\java\base\
    
    and type at the command prompt:
    
    javac org\somepack1\subpack2\SomeGUI.java
    
    then the compiler tell me that he cannot find a file/package "org.somepack.addclass"
    But the java file org\soempack\addclass.java EXISTS !
    
    Why does the compiler not find this class/source ?
    
    Can I somehow tell the compiler (from the command line !):
    
    "here is the source directory tree. Search for all you need and compile all
    necessary classes in the sequence you need".
    
    Tom
- 5
  - Package Naming Best PracticesSteven Garcia wrote:
    
    > Is this inadvisable? On one hand it provides clarity for the classes
    > in a package, on the other hand that clarity might confuse those who
    > are really familiar with the Java API.
    
    As it doesn't follow the package naming specification, I'd say you need
    to modify your approch somewhat.
    
    As you don't own the rights to the Java API (or the Java name), it
    might be better to instead use the following, which would comply with
    the spec:
    
    net.domainname.mp.lang
    net.domainname.mp.text
    net.domainname.mp.util
    net.domainname.mp.io
    ...etc.
    
    That's my advice -- you're welcome to use it or ignore it as it suits
    you :).
    
    HTH!
    
    Brad BARCLAY
    
    --
    =-=-=-=-=-=-=-=-=
    From the OS/2 WARP v4.5 Desktop of Brad BARCLAY.
    The jSyncManager Project: http://www.jsyncmanager.org
- 7
  - Many to Many CMR with an attributeHi,
    
    I have a db scheme where i have a Many to Many relation but i have to
    store an attribute in the mapping table. Then, i thought i could
    transform my N-N relation in two 1-N relation, explicitely creating the
    mapping table with my own attribute but this table has no primary key
    (actually it should be the composition of the two foreign keys). Is it
    possible to create an Entity where primary keys is the composition of 2
    CMR fields or is there another way to do something like that ?
    
    The db :
    
    Supplier(id, name, ...) <-*--(quantity)--*-> Item(id, name, ..)
    
    which is actually
    
    Supplier(id, name, ...) <-1--*-> Supplier_Item(sup_id, item_id,
    quantity) <-*--1-> Item(id, name, ...)
    
    Thanks.
- 7
  - random names, yeap im bored/*i think someone should you this to name their baby*/
    import java.util.Random;
    public class name
    {
    public static void main(String[] args)
    {
    String string1;
    char char1 = 7;
    string1 = " ";
    int temp, length;
    Random generator = new Random();
    length = generator.nextInt(10);
    for(int blah = 0;blah <= length;blah++)
    {
    temp = generator.nextInt(26);
    if(temp == 1)
    char1 = 65;
    if(temp == 2)
    char1 = 66;
    if(temp == 3)
    char1 = 67;
    if(temp == 4)
    char1 = 68;
    if(temp == 5)
    char1 = 69;
    if(temp == 6)
    char1 = 70;
    if(temp == 7)
    char1 = 71;
    if(temp == 8)
    char1 = 72;
    if(temp == 9)
    char1 = 73;
    if(temp == 10)
    char1 = 74;
    if(temp == 11)
    char1 = 75;
    if(temp == 12)
    char1 = 76;
    if(temp == 13)
    char1 = 77;
    if(temp == 14)
    char1 = 78;
    if(temp == 15)
    char1 = 79;
    if(temp == 16)
    char1 = 80;
    if(temp == 17)
    char1 = 81;
    if(temp == 18)
    char1 = 82;
    if(temp == 19)
    char1 = 83;
    if(temp == 20)
    char1 = 84;
    if(temp == 21)
    char1 = 85;
    if(temp == 22)
    char1 = 86;
    if(temp == 23)
    char1 = 87;
    if(temp == 24)
    char1 = 88;
    if(temp == 25)
    char1 = 89;
    if(temp == 26)
    char1 = 90;
    string1 = string1 + char1;
    }
    System.out.println(string1);
    }
    
    }
- 7
  - short circuit operatorsOn Feb 25, 5:19 pm, Patricia Shanahan <email***@***.com> wrote:
    > k-e-n wrote:
    >
    > ...
    >
    > > Also as I mention in the list below it is simply not good practice to
    > > mix Bitwise and Boolean operators in the same expression, just because
    > > you can, does not mean you should.
    > ...
    > > 3. And I think most important of all: Do Not Mix Boolean Operators and
    > > Bitwise Operators in the Same Expression.
    >
    > Note that "|" and "&" with boolean operands, such as true and false, are
    > not bitwise operations. They are boolean operations without
    > short-circuiting, so that the right hand side is evaluated regardless of
    > the left hand side value. They are only bitwise operators if applied to
    > integer operands.
    >
    > What is wrong with mixing bitwise and boolean operators in the same
    > expression? Suppose I want to do something if a particular bit is on in
    > either of two ints:
    >
    > if( (intA & mask) || (intB & mask) )
    >
    > seems reasonable to me, but it definitely mixes bitwise and boolean
    > operations. How would you do it?
    >
    > Patricia
    
    I would do it as you have done and as Joshua Cranmer suggests, use
    parenthesis to make the precedence and more specifically your intent
    clear.
    To a programmer the parenthesis are sufficient advice, to someone who
    seems not to understand precedence or perhaps more specifically wants
    to know why the rule(s)
    exists and what is the meta-rule behind that, I felt something
    stronger was required.
    
    Did you have any problem with any other parts of my comment? I have no
    wish to cause offense or create any controversy.
- 7
  - new error building jdk14I've been having quit a bit of difficulty getting jdk14 built on my new
    machine. I think this is a heretofore unreported error.
    
    uname -a output:
    
    FreeBSD new.cognitiongroup.biz 5.4-RELEASE FreeBSD 5.4-RELEASE #0: Sun
    May 8 07:00:26 UTC 2005
    email***@***.com:/usr/obj/usr/src/sys/GENERIC amd64
    
    The build crashes when it tries to compile interpreterRT_i486.cpp
    because it has some ABSTRACT methods defined. I'm shocked that the
    build would break because it generates code that can't be compiled.
    But, I suspect it's a setting, configuration file, or something simple
    because others seem to be getting their jdk14 compiled fine.
    
    Here's the abridged build output:
    
    ==============================================================
    
    ===> Vulnerability check disabled, database not found
    LIBC_R TEST PASSED: All Ok
    
    IMPORTANT: To build JDK 1.4.2 port, you should have at least
    1.7Gb of free disk space in build area!
    
    IMPORTANT: To build JDK 1.4.2 port, you should have linux emulation
    enabled in the kernel and linux procfs (linprocfs) filesystem
    mounted.
    
    Following port compile time options are available:
    
    WITH_DEBUG - install JDK binaries and libraries
    with debuging support
    
    MINIMAL - don't build/install mozilla java
    plugin, javaws and JDK demos
    
    WITH_IPV6 - enable JDK IPv6 support
    
    ===> Extracting for jdk-1.4.2p7
    => Checksum OK for j2sdk-1_4_2-src-scsl.zip.
    => Checksum OK for j2sdk-1_4_2-bin-scsl.zip.
    => Checksum OK for bsd-jdk14-patches-7.tar.gz.
    ===> jdk-1.4.2p7 depends on executable: zip - found
    ===> jdk-1.4.2p7 depends on executable: unzip - found
    ===> Patching for jdk-1.4.2p7
    Hmm... Looks like a unified diff to me...
    The text leading up to this was:
    
    <snip: patching output>
    
    WARNING: Your build environment has the variable DEV_ONLY
    defined. This will result in a development-only
    build of the J2SE workspace, lacking the documentation
    build and installation bundles.
    
    Sanity check passed.
    /bin/mkdir -p ../build/bsd-amd64/hotspot-amd64/tmp
    (cd ./../build/bsd-amd64/hotspot-amd64/tmp; \
    gmake -f /usr/ports/java/jdk14/work/hotspot/build/bsd/Makefile product \
    HOTSPOT_BUILD_VERSION=1.4.2-p7-rschilling_04_nov_2005_11_18
    LP64=1 GAMMADIR=/usr/ports/java/jdk14/work/hotspot ; )
    gmake[1]: Entering directory
    `/usr/ports/java/jdk14/work/control/build/bsd-amd64/hotspot-amd64/tmp'
    sh /usr/ports/java/jdk14/work/hotspot/build/bsd/makefiles/buildATree.sh
    compiler2 /usr/ports/java/jdk14/work/hotspot bsd i486
    (cd bsd_i486_compiler2/product; gmake)
    gmake[2]: Entering directory
    `/usr/ports/java/jdk14/work/control/build/bsd-amd64/hotspot-amd64/tmp/bsd_i486_compiler2/product'
    Removing ../generated/includeDB.current to force regeneration.
    cd ../generated; cat
    /usr/ports/java/jdk14/work/hotspot/src/share/vm/includeDB_core
    /usr/ports/java/jdk14/work/hotspot/src/share/vm/includeDB_gc
    /usr/ports/java/jdk14/work/hotspot/src/share/vm/gc_implementation/includeDB_gc_parallelScavenge
    /usr/ports/java/jdk14/work/hotspot/src/share/vm/gc_implementation/includeDB_gc_shared
    /usr/ports/java/jdk14/work/hotspot/src/share/vm/includeDB_ci
    /usr/ports/java/jdk14/work/hotspot/src/share/vm/includeDB_compiler2 >
    includeDB
    cd ../generated; if [ ! -r incls ] ; then \
    mkdir incls ; \
    fi
    cd ../generated; /usr/local/linux-sun-jdk1.4.2/bin/java -classpath .
    MakeDeps diffs UnixPlatform platform.current includeDB.current
    /usr/ports/java/jdk14/work/hotspot/build/bsd/platform_i486 includeDB
    -firstFile functionAtStart.cpp -lastFile functionAtEnd.cpp
    Old database:
    computing closures
    
    New database:
    reading database: includeDB
    computing closures
    
    Deltas:
    updating output files
    
    The order of .c or .s has changed, or the grand include file has changed.
    writing individual include files
    
    creating functionAtStart.cpp
    creating accessFlags.cpp
    creating allocation.cpp
    creating aprofiler.cpp
    creating arguments.cpp
    
    <snip: some output deleted due to length>
    
    creating functionAtEnd.cpp
    writing grand include file
    
    writing dependencies file
    
    cd ../generated; cp includeDB includeDB.current
    cd ../generated; cp
    /usr/ports/java/jdk14/work/hotspot/build/bsd/platform_i486 platform.current
    gmake[3]: Entering directory
    `/usr/ports/java/jdk14/work/control/build/bsd-amd64/hotspot-amd64/tmp/bsd_i486_compiler2/product'
    
    <snip: more build output omitted, the error is next>
    
    Compiling
    /usr/ports/java/jdk14/work/hotspot/src/cpu/i486/vm/interp_masm_i486.cpp
    Compiling
    /usr/ports/java/jdk14/work/hotspot/src/cpu/i486/vm/interpreterRT_i486.cpp
    /usr/ports/java/jdk14/work/hotspot/src/cpu/i486/vm/interpreterRT_i486.cpp:
    In static member function `static void
    SignatureHandlerLibrary::add(methodHandle)':
    /usr/ports/java/jdk14/work/hotspot/src/cpu/i486/vm/interpreterRT_i486.cpp:83:
    error: cannot allocate an object of type
    `InterpreterRuntime::SignatureHandlerGenerator'
    /usr/ports/java/jdk14/work/hotspot/src/cpu/i486/vm/interpreterRT_i486.cpp:83:
    error: because the following virtual functions are abstract:
    /usr/ports/java/jdk14/work/hotspot/src/share/vm/runtime/signature.hpp:283:
    error: virtual void NativeSignatureIterator::pass_float()
    /usr/ports/java/jdk14/work/hotspot/src/share/vm/runtime/signature.hpp:284:
    error: virtual void NativeSignatureIterator::pass_double()
    /usr/ports/java/jdk14/work/hotspot/src/cpu/i486/vm/interpreterRT_i486.cpp:
    In static member function `static u_char*
    InterpreterRuntime::slow_signature_handler(JavaThread*, methodOopDesc*,
    jint*, jint*)':
    /usr/ports/java/jdk14/work/hotspot/src/cpu/i486/vm/interpreterRT_i486.cpp:156:
    error: cannot allocate an object of type `SlowSignatureHandler'
    /usr/ports/java/jdk14/work/hotspot/src/cpu/i486/vm/interpreterRT_i486.cpp:156:
    error: because the
    following virtual functions are abstract:
    /usr/ports/java/jdk14/work/hotspot/src/share/vm/runtime/signature.hpp:283:
    error: virtual void NativeSignatureIterator::pass_float()
    /usr/ports/java/jdk14/work/hotspot/src/share/vm/runtime/signature.hpp:284:
    error: virtual void NativeSignatureIterator::pass_double()
    gmake[3]: *** [interpreterRT_i486.o] Error 1
    gmake[3]: Leaving directory
    `/usr/ports/java/jdk14/work/control/build/bsd-amd64/hotspot-amd64/tmp/bsd_i486_compiler2/product'
    gmake[2]: *** [the_vm] Error 2
    gmake[2]: Leaving directory
    `/usr/ports/java/jdk14/work/control/build/bsd-amd64/hotspot-amd64/tmp/bsd_i486_compiler2/product'
    gmake[1]: *** [product] Error 2
    gmake[1]: Leaving directory
    `/usr/ports/java/jdk14/work/control/build/bsd-amd64/hotspot-amd64/tmp'
    gmake: *** [product] Error 2
    *** Error code 2
    
    Stop in /usr/ports/java/jdk14.
    
    ==============================================================
    _______________________________________________
    email***@***.com mailing list
    http://lists.freebsd.org/mailman/listinfo/freebsd-java
    To unsubscribe, send any mail to "email***@***.com"
- 7
  - JavaBean default property editorsI am looking for information on default property editors for JavaBean
    properties. There are three cases in which I am hoping that a default
    property editor exists for a given property:
    
    1) The property is a collection class of references to other beans of a
    particular base type which has already been been added to a bean
    context. I am hoping that there is a default property editor which
    allows the end-user programmer to add items to the collection, and then
    connect each item to an appropriate bean already existing in the bean
    context.
    
    2) The property is a reference to another bean of a particular base type
    which has already been added to a bean context. I am hoping that there
    is a default property editor which allows the end-user programmer to
    connect the property to an appropriate bean already existing in the bean
    context.
    
    3) A property editor which takes a reference to another bean as an
    embedded bean ( one that is already initialized as a reference in the
    parent bean ), and allows the embedded bean to expand its own properties.
    
    Do such property editors exist, or do I actually need some sort of
    custom property editor in any or all of these common cases ?
- 8
  - JWS Program problem with MACIn article <47e58b1b$0$1630$email***@***.com>,
    Knute Johnson <email***@***.com> wrote:
    
    > http://rabbitbrush.frazmtn.com/aviation/
    
    Here's the diagnostic info from a failed run on Mac OS 10.4.11 (ppc),
    java version 1.5.0_13:
    
    [General]
    
    An error occurred while launching/running the application.
    
    Category: Launch File Error
    
    No JRE version found in launch file for this system
    
    [Launch File]
    
    <?xml version='1.0' encoding='UTF-8' ?>
    
    <jnlp spec='1.0+'
    
    codebase='http://rabbitbrush.frazmtn.com/aviation'
    
    href="flightlog.jnlp">
    
    <information>
    
    <title>VFR Flight Log</title>
    
    <vendor>Knute Johnson Software</vendor>
    
    <homepage href="index.html"/>
    
    <icon kind="splash" href="catalina.jpg" />
    
    </information>
    
    <resources>
    
    <java version='1.5+' />
    
    <jar href='sVFRFlightLog.jar' />
    
    </resources>
    
    <application-desc
    
    main-class='com.knutejohnson.tools.aviation.vfrlog.VFRFlightLog'>
    
    </application-desc>
    
    <security>
    
    <all-permissions/>
    
    </security>
    
    </jnlp>
    
    [Exception]
    
    NLPException[category: Launch File Error : Exception: null : LaunchDesc:
    <jnlp spec="1.0+" codebase="http://rabbitbrush.frazmtn.com/aviation/"
    href="http://rabbitbrush.frazmtn.com/aviation/flightlog.jnlp">
    <information>
    <title>VFR Flight Log</title>
    <vendor>Knute Johnson Software</vendor>
    <homepage href="http://rabbitbrush.frazmtn.com/aviation/index.html"/>
    <icon href="http://rabbitbrush.frazmtn.com/aviation/catalina.jpg"
    kind="splash"/>
    </information>
    <security>
    <all-permissions/>
    </security>
    <resources>
    <jar
    href="http://rabbitbrush.frazmtn.com/aviation/sVFRFlightLog.jar"
    download="eager" main="false"/>
    </resources>
    <application-desc
    main-class="com.knutejohnson.tools.aviation.vfrlog.VFRFlightLog"/>
    </jnlp> ]
    at com.sun.javaws.Launcher.handleLaunchFile(Launcher.java:210)
    at com.sun.javaws.Launcher.run(Launcher.java:165)
    at java.lang.Thread.run(Thread.java:613)
    
    --
    John B. Matthews
    trashgod at gmail dot com
    home dot woh dot rr dot com slash jbmatthews
- 11
  - Mechanism to identify calling object/method?Is there a mechanism within Java (J2SE 5) that would allow me to
    identify which object and/or method is calling a target method?
    
    For example, if I have method Class1.foo() that is being called from
    Class2.bar(), is there a way for Class1.foo() to identify one or both
    of the calling object and method?
    
    -Nedron
- 11
  - modularity / granularity of security for a Java application (not applet)Can an administrator control the security restrictions for Java
    applications, separately from restrictions for native, non-Java apps?
    
    If so, what are (some of) the resources that can be restricted?
    
    Specifically, can a Java application be temporarily prevented from using
    network services?
    
    Again, this is for an application, not an applet.
    
    Thanks for any information,
    George
- 12
  - copying Image to system clipboardHi
    
    As far as I can tell this is not possible to copy an Image to the
    system clipboard with java at the moment. However I need it for a
    project I'm working on. Has anyone found any hacks to make this
    possible? Also, are there any chances that this feature will be
    incorporated into the JDK at some point in the future? Are plans in the
    offing?
    
    Thanks for any advice.
    
    Michael
- 12
  - jsp:multiple file/directory uploadHello i want to upload mutliple files at a time in jsp
    i.e want to upload whole directory or folder at one go
    is there any way to do this if any one knows plz let me know
    thanks in advance
- 12
  - Authenticating Against Users Defined In a Database - TomcatCould someone point me in the right direction - I'm trying to
    authenticate users against a SQL Server database and found plenty of
    articles on how to create tables such as user-roles but I want to use
    the actual users defined in SQL Server, because the users are also
    directly logging into the db. I also tried using NTLM but our
    production environment will not allow this.
    
    TIA
- 14
  - Basic jstl problem - Setting a bean propertyHi,
    
    I have a simple class :
    
    public class MyClass {
    
    private String attrib = null;
    
    public MyClass() {}
    
    public void setAttrib(String attrib) {
    this.attrib = attrib;
    }
    
    public String getAttrib() {
    return this.attrib;
    }
    }
    
    I also have a simple JSP:
    
    <%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %>
    <jsp:useBean id="myclass" class="MyClass"/>
    
    If I try to set the "attrib" property using
    
    <c:set target="${myclass}" property="attrib" value="somevalue"/>
    
    I got an error:
    
    javax.servlet.jsp.JspTagException: Invalid property in <set>:
    "attrib"
    org.apache.taglibs.standard.tag.common.core.SetSupport.doEndTag(SetSupport.java:160)
    
    I tryed target="${myclass.attrib}", but I receive another error:
    
    javax.servlet.jsp.JspException: An error occurred while evaluating
    custom action attribute "target" with value "${myclass.attrib}":
    Unable to find a value for "attrib" in object of class "MyClass" using
    operator "." (null)
    
    Any help?
    
    TIA,
    
    Bob

Author

Message

John Rushford

Posted: 2005-11-11 13:07:00

Top

java-programmer, JDK1.5 with Jboss Greetings,

I want to try and work with some EJB3 stuff for a small website hosted on a
FreeBSD 5.4 server and was wondering at the state of JDK1.5 port and if it
is ok to use it with Jboss under FreeBSD.

Thanks
John

jjr

Posted: 2005-11-11 13:11:00

Top

java-programmer >> JDK1.5 with Jboss Greetings,

I want to try and work with some EJB3 stuff for a small website hosted on a
FreeBSD 5.4 server and was wondering at the state of JDK1.5 port and if it
is ok to use it with Jboss under FreeBSD.

Thanks
John

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Panagiotis Astithas

Posted: 2005-11-11 16:37:00

Top

past

Posted: 2005-11-11 16:39:00

Top

java-programmer >> JDK1.5 with Jboss John Rushford wrote:
> Greetings,
>
> I want to try and work with some EJB3 stuff for a small website hosted on a
> FreeBSD 5.4 server and was wondering at the state of JDK1.5 port and if it
> is ok to use it with Jboss under FreeBSD.

It sure runs fine here.

Cheers,
Panagiotis
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Index ‹ java-programmer

Next
- 1
  - Exec() Help!Hi,
    
    I'm trying to start an external applet from an applet I'm writing. I know
    Exec() Is the key, but I don't know how to use it. I know how to execute
    external native programs (I.e. programs I have written in BASIC and
    compiled). But starting an applet from an applet totally throws me. I have
    tried searching the net, and that has a lot to say about executing shell
    scripts, and natives - which I know how to do.
    
    What classes do I need to import? what line of code invokes an external
    applet? I don't need to grab output from the applet I want to execute, or
    send input. I just want it to run.
    
    Pleeeeeeez can anyone help, my project has to be handed in soon :-(
    
    Thanks,
    
    Dafydd.
- 2
  - Toward a generic Disk Sort for JavaI was thinking how you might go about writing a sort that could handle
    more data than could fit in RAM. It handled the problem is Abundance
    by checkpointing the app to disk to free up maximum RAM, then spawning
    a copy of Opt-Tech sort. My records were roughly like DataOutputStream
    would produce, so I could automatically generate the command script
    sort the fields in any way I wanted.
    
    I thought you might pull it off in Java this way.
    
    1. You write a comparator as if you were going to sort Objects in an
    ArrayList.
    
    2. the external sort has an add method that also takes collections.
    
    It accepts a "chunk" of records, and sorts them using Sun's sort.
    
    Then it writes them out as SERIALISED objects in heavily buffered
    stream. There may be some way to do a partial reset after each object
    to speed it up.
    
    Then you repeat collecting, sorting and writing another batch to
    another file.
    
    When you have created N files, you recycle, appending. (Optimal N to
    be determined by experiment). Ideally each file would be on a
    different physical drive.
    
    Then when all the records have been added, you start merging chunks
    into longer chunks, and writing out the longer chunks. Each N-way
    merge cuts the number of chunks by 1/N and increases the length of the
    chunks N times.
    
    on the final merge pass does not happen until the user invokes the
    Iterator to hand over the resulting records.
    
    Another way it might be done is the records to be sorted must by byte
    arrays, chunks effectively produced by DataOutputStream. You specify
    offset, length and key type e.g.
    int, byte, short, float, double, String.
    
    This would require a detailed knowledge of the bit structure of the
    records, the way you did in the olden days of assembler and C.
    
    This would be clumsier to use, but would avoid the overhead of
    pickling and reconstituting records on every pass.
    
    Then of course, there is the possibility someone has already solved
    this and done it well.
    
    The universe has a sneaky habit. Problems start out small, and it
    looks like a purely in RAM solution is perfectly adequate. Then they
    bit by bit grow and grow and start pushing the limits of the RAM
    solution. Suddenly you are faced with a major redesign.
    --
    
    Roedy Green Canadian Mind Products
    The Java Glossary
    http://mindprod.com
- 3
  - Convert from text string "Hello" to floating-point number issueHi there,
    My java lecturer has given us an assignment related to casting and
    type conversion etc.
    One of the conversions he wan't is convert "Hello" to a float.
    
    I suspect this is a trick question on his part as "Hello" is not a
    parsible value.
    This is the code I have:
    //Convert String object "s" to a Float object
    //then convert Float object to float value
    try { System.out.println("String is "+s+" float is
    "+Float.valueOf(s).floatValue());
    }
    
    catch (NumberFormatException NFE)
    { System.out.println("NumberFormatException: "+ NFE.getMessage()+
    " The input string does not contain a parsable number"); }
    I emailed the guy but he says just to use your own judgement.
    I looked at the API for the wrapper classes etc and I think a
    conversion of this type is almost impossible.
    Any ideas welcome.
- 4
  - Problems in printing an IntegerHamvil ha scritto:
    
    > 1) why I get the blank page instead of the usual exception in the jsp
    > page?
    
    Ok, I've fixed this (it was a problem with the configuration of the
    logger
    
    > 2) why the variable cannot be printed?
    
    In the logger i get the following message:
    
    javax.servlet.jsp.JspException: Cannot find message resources under key
    org.apache.struts.action.MESSAGE
    
    What I do not understand is why struts looks for a key in the resources
    file. It should just print the integer. Am I missing somethink?
    
    BTW if I add the following in the struts-config the problem look fixed.
    Is this the right approach?
    
    <message-resources
    parameter="MyWebAppResources"
    null="false" />
    
    Thanks
- 5
  - Clipboard doesn't see changes to the system-clipboard...I have an signed Applet with a JTable, where I have implemented
    "cut & paste" to/from the system clipboard.
    
    (The applet is signed to get access to the system clipboard).
    
    Everything works as expected; Copying a row from ie. Excel,
    and pasting it into a JTable row, or the other way around.
    
    But... After I do a "local" copy/paste, that is, copy a row from
    my JTable, and pasting it into another row, the Applet doesn't see
    changes to the system-clipboard anymore. If I after this copy a new
    row out of Excel, and try to paste it into my Applet table, what I get
    is the old data from my last "local" copy-paste operation.
    
    Anyone seen this behaviour before?
    
    Any hints?
    
    TIA...
- 6
  - do XML/XSD validation with Ant 1.5.4 and JDK 1.4.2. How?Buried somewhere in the documentation for the 1.4 JDK is a statement that
    the included XML parser class cannot do schema validation (DTD validation:
    yes, Schema validation: no). However, I believe that Ant uses the XML
    parser in its ANT_HOME/lib directory. You probably have an older xerxes.jar
    and the your best bet is to delete that and download the latest xerces.jar
    and drop it into the ANT_HOME/lib directory.
    
    <email***@***.com> wrote in message
    news:email***@***.com...
    > I really need to be able to validate XML against an XSD, using Ant
    > 1.5.4 and JDK 1.4.2. It appears this is straightforward to do with the
    > latest Ant release and/or the latest JDK, but not with the releases
    > that I'm limited to.
    >
    > I noticed the "iso-relax" sourceforge project, which includes the JARV
    > library (which contains the Ant task). This was promising, but it
    > causes an NPE to be thrown in Xerces' XMLSchemaValidator class, and I
    > have no idea why.
    >
    > I'm querying the ant-user mlist about this, but I figured this would be
    > another good place to try.
    >
- 7
  - I really need help with this so if anyone can help me out that would be really great of you.On Feb 6, 9:12 pm, Lew <email***@***.com> wrote:
    > email***@***.com wrote:
    > >> Part II
    >
    > >> To make a profit a local store marks up the prices of its items by
    > >> 25%. Write a Java program that declares the following variables:
    > >> 1. a double variable named percent_markedup
    > >> 2. a double variable named original_price
    > >> 3. a double variable named sales_tax_rate
    >
    > >> In your program be sure to assign a value to each of the variables 1-3
    > >> above. Use initialization for 1 and 2 and for 3.
    >
    > >> Using the information from above, the program should then output:
    > >> 1. the original price of the item
    > >> 2. the marked-up percentage of the item (original price times percent
    > >> of markup)
    > >> 3. the store's selling price of the item
    > >> 4. the sales tax rate
    > >> 5. the sales tax
    > >> 6. the final price of the item (the final price of the item is the
    > >> selling price plus the sales tax)
    >
    > >> can u send me an email or using this to communicate.
    >
    > Please do not use textspeak in Usenet posts.
    >
    > A couple of points about your assignment that you will need to know if you
    > ever use Java outside of school:
    >
    > - by long-standing and nearly rigid convention, Java variables are spelled
    > without underscores and with mixed case, capitalizing each word part except
    > the first, hence "percentMarkedUp".
    >
    > - doubles work fine as currency values for academic work, but not so much in
    > the real world. The issues are somewhat complex, so we stick with doubles
    > until we've learned some more of the basics.
    >
    > Let's review your assignment piece by piece:
    >
    > >> Write a Java program
    >
    > I'll give you this part. A "Java program" is a class with a properly-defined
    > main() method.
    >
    > package programming.oneohone;
    > public class RetailModel
    > {
    > public void main( String [] args )
    > {
    > }
    >
    > }
    > >> that declares the following variables
    >
    > There are two places you could declare variables so far, within the class
    > itself as instance or class variables, or within the main() method. The
    > main() method is simpler, so start there.
    >
    > >> 1. a double variable named percent_markedup
    > >> 2. a double variable named original_price
    > >> 3. a double variable named sales_tax_rate
    >
    > Do you know how to declare variables? I'll give you one, focusing in on just
    > the main() method and not the rest of the class.
    >
    > public void main( String [] args )
    > {
    > double percent_markedup;
    > }
    >
    > It's the same for the others.
    >
    > >> In your program be sure to assign a value to each of the variables 1-3
    > >> above. Use initialization for 1 and 2 and for 3.
    >
    > Well, the declaration of 1. that I showed you doesn't assign a value, because
    > it doesn't have an initialization clause.
    >
    > Yet.
    >
    > The tutorial gives a hint near the top of the page about initialization, in
    > case you forget the course information:
    > <http://java.sun.com/docs/books/tutorial/java/nutsandbolts/variables.html>
    >
    > So go ahead and modify the declarations you just wrote and add the
    > initializations.
    >
    > Solve one itty-bitty problem at a time, and make sure your program is correct
    > at each stage. Only then add in the next piece of the puzzle, one itty-bitty
    > problem at a time.
    >
    > This is beginning to sound a lot like Patricia Shanahan's advice, isn't it?
    > You should go back to her link and read it again, very carefully.
    >
    > Quiz: Where (in what file) do you store the source code for your RetailModel
    > program?
    >
    > General advice: Read the rest of the tutorial, not just the one page I linked
    > you to.
    >
    > --
    > Lew
    
    hey Lew thank you soo soo much that instruction by instruction really
    helped me a lot and thank you so much again.
- 8
  - Formatting a string in JavaHi
    
    I am a newby in Java and am trying to format a string into a fixed
    number of positions( in this case 5).
    So if I have a "5" in should be "00005", and "23" should be "00023".
    
    I hav tried looking at the classes 'import java.text.NumberFormat' and
    'import java.text.Format', but I didn't get far.
    
    Can anyone help me how I can do this in java?
    
    Any help will be appreciated.
    
    Regards
- 9
  - create a new windows (xp) service that runs a jar fileHello guys,
    
    Does anyone has experience/know how to create a new windows (xp)
    service that runs a jar file? This issue rises as i need to hide the
    most of the java implementation in this project before it goes live.
    
    So the idea is, to have control on the exceution of the jar from
    windows windows service console (which the users can define the startup
    type i.e. manual, automatic, disabled and the running life cycle i.e.
    start, stop, pause, resume, restart...).
    
    so any leads to solving this will be appreciated.
    
    Thanks in advance. Have a nice day!
- 10
  - JTabel and JScrollPane doens't scrollHello,
    
    I have a problem with a larger table.
    
    I have a JTable whiches model contains 38 columns.
    
    I put this Table in a JScrollPane. But on the screen there is no
    scrollbar but a table with 38 very small columns.
    
    I thought there must be a scroll bar for horizontal scrolling instead.
    
    Are there any traps in this?
    
    kind regards
    
    Falko
- 11
  - What Collection to use?Dear all,
    
    My app can load files using a FileChooser. I would like to store the
    last 4 loaded file pathes so I can use them later (ie fast access to
    last used files). I'm looking for the perfect Collection to store these
    4 File objects.
    I think it should have the following properties
    1. no duplicate objects
    2. knowing the insert order (so you know which was last entered)
    3. limited size (4 objects) and throwing out the oldest entry when
    inserting a new one (like a ring buffer maybe)
    
    Is there such a Collection already or do I have to homecook one?
    
    Thanks for your answers
    Phil
    
    PS: Is there a summary table on the web with all properties of the
    standard subclasses of Collection and Map?
- 12
  - Job for the Position of Project Lead in a MNC at BangaloreCompany Profile :
    
    The company is an ISO 9001:2000 Quality certified company, is in the
    business of providing world-class software solutions and support
    services to its clients. Located in Bangalore. They provide IT
    services across various domains such as Insurance, Financial Services,
    Travel, Retail, and Logistics etc. They have been building customized
    applications that have robust layers of application architecture.
    
    Job Profile :
    
    Incumbent should have hands on in Core Java, MVC Architecture, Design
    Patterns,J2EE, Struts,EJB, MySQL
    Must have knowledge of APEX.
    Should have min 6 yrs of exp
    Should have good oral and written communication and good analytical
    skills
    
    Job location: Bangalore
    
    Salary wont be a constraint for the right candidate.
    
    If you are interested..send me your updated resume as soon as
    possible email***@***.com
- 13
  - StreamCorruptedExceptionHi
    sorry my english is not very good [:())
    
    i have something like that:
    
    Socket------------------------------------------------class1------ObjectOutp
    utStream
    |
    |
    |
    inner class in class1-thread-ObjectInputSt.
    |
    -----------------class2
    | |
    | inner class in class2 thread ObjectInputStream,
    ObjectOutputStream
    |
    |
    |
    --------class3- and here when i create ObjectOutputStream in inner class in
    class1 in thread
    jumps out exception StreamCorruptedException
    why?
    please help
    i don't know what i have should do?
    Czeski
- 14
  - JSP codeHi,
    I have the following code
    
    <html>
    <head>
    <title>
    Authentication
    </title>
    </head>
    
    <body>
    <%!
    private String username = null;
    private String password = null;
    private boolean completeLoginInformation=true;
    %>
    
    <%
    username = request.getParameter("username");
    password = request.getParameter("password");
    %>
    
    <H2><p>Checking authentication...</p></H2>
    <%
    if (username == null)
    { completeLoginInformation = false;
    %><p><H3>Username has been left empty...</H3></p>
    <% } %>
    
    <%
    if (password == null)
    { completeLoginInformation = false;
    %><p><H3>Password has been left empty...</H3></p>
    <% } %>
    
    <% if (completeLoginInformation == false) { %>
    <p><a href="http://localhost:8080/jsp-examples/cal/Front.jsp">Return
    back to Front Page</a></p>
    <p><a href="http://localhost:8080/jsp-examples/cal/AdminLog.jsp">Return
    back to Administration Authentication</a></p>
    <% } else { %>
    <p>Need to search in database</p>
    <p>All data has been entered</p>
    <% } %>
    
    </body>
    </html>
    
    Now when username and password arguments are given as empty, the flag
    is supposed to be set free and in the web browser shows me the 2 links
    given. Instead, the else part is being given.
    
    Can someone help me out
    
    Thanks in Advance
- 15
  - instanceOf operator new bie questionI am using Java 1.4.2.x
    
    I wrote following code:
    
    NumberFormat df;
    df = NumberFormat.getInstance();
    if (df instanceof DecimalFormat) {
    ((DecimalFormat) df).setMinimumIntegerDigits(1);
    ((DecimalFormat) df).setDecimalSeparatorAlwaysShown(true);
    }
    
    What does "df instanceof DecimalFormat" really mean? Does it mean that
    NumberFormat can be converted to DecimalFormat? Because my
    NumberFormat.getInstance() is returning me a NumberFormat and not
    DecimalFormat what else could it mean.
    
    I did read about instanceOf opeartor on google, but it is still
    confusing to me.
    
    Thanks a lot.
    Prem