java-programmer >>Java inherited annotations

Java inherited annotations

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- 1
  - Corba java apllet client communication problemI hava a problem with communication between Java/Corba server based on JDK
    ORB with Java/Corba client (applet)
    based on the same ORB. I`m using IOR to localize server.
    
    client`s ORB i initialize like that:
    Dane proxy = null;
    ORB orb = ORB.init(parent, null);
    org.omg.CORBA.Object obj = orb.string_to_object(sIOR);
    proxy = DaneHelper.narrow(obj);
    server`s ORB i initialize like that:
    ORB orb = ORB.init(args, null);
    POA rootpoa = POAHelper.narrow(orb.resolve_initial_references("RootPOA"));
    rootpoa.the_POAManager().activate();
    DaneImpl oDane = new DaneImpl();
    org.omg.CORBA.Object ref = rootpoa.servant_to_reference(oDane);
    String ior = orb.object_to_string(ref);
    
    It looks like that:
    - if i`m trying to run applet throught web site from the same (192.168.0.1)
    computer where Corba sever works
    everything works fine, i write it in the browser->
    http://192.168.0.1//TestCoraba.html
    - if i`m trying to run applet throught web site from an other (192.168.0.2)
    computer server receive method call
    from client but client can`t receive server`s answer and stops, i write it
    in the browser-> http://192.168.0.1//TestCoraba.html
    
    Maybe you what i`m doing wrong.
    Thanks form any help.
    Best Regards - gRabbi
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  - Forcing System.gc()I have an app that, at one point, really bogs down as so many objects are
    created and released in a lengthy process.
    
    I am wondering if I may not be able to improve performance by System.gc() in
    some "right" places in my code (wherever those might be!). It seems to me
    though, that the gc facilities in Java are so good, that this is something
    best left up to the JVM, and NOT mess with putting System.gc() in anyplace?
    
    I am on WinXP / Vista and JRE 1.6.x. TIA, R. Vince
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  - Jars built with JDK 1.3 and JDK 1.4 interoperatingThe Runtime Environment is JRE 1.4. The latest code I have written has
    been compiled with JDK 1.4. However it depends on some packages written
    and compiled with JDK 1.3. Is there anything to look out for in this
    kind of setup or should I have to recompile the older code with 1.4? I
    have tested the whole thing and it works, but I wanted some more
    information. It is a swing code and I need the JProgressBar's
    indeterminate state which is available only in JDK 1.4.
    
    Any update is welcome. If there is any document explaining the above,
    that would be perfect. I searched but I was not able to find any
    reference.
    
    Thanks
    JS
- 1
  - 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 ?
- 1
  - 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
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  - [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.
    
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- 3
  - Why is creating a simple component with Netbeans IDE fails with an exceptionHi
    
    steps:
    using a mounted sub-directory named TESTING
    
    Template: In the Explorer, select the TESTING node and choose File New "Java
    Gui Form" Bean Form. click next
    Target Location: In Name enter TargetName. click next
    Basic Class definition: Superclass select javx.swing.JComponent. click
    finish
    
    Why do you get an exception :
    Cannot determine form type (javax.swing.JComponent)
    Please make sure the class is a JavaBean
    The form cannot be opened.
    
    I am trying to build a component similar to a JLabel which is a JavaBean
    derived directly from a JComponent.
    
    Which step is missing or am I completly out to lunch.
    
    Thanks in advance
    
    Andre
- 3
  - popupmenu for a cell in a JTableHello
    
    I want to have a popupmenu when I right click on a selected cell in a JTable
    (using with a AbtractTableModel). What are steps I should do, please help.
    
    Thank you
    S.Hoa
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  - Mp3 converter to WavHi,
    
    I just need to convert a mp3 file to the Wav format.
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    In that case, do you know any link that could help me to understand how to
    do this ?
    
    Thanks !
- 10
  - Tomcat, Oracle, connection pooling, BLOBsI have a rather strange problem with Tomcat's connection pooling and
    the Oracle JDBC driver when using BLOBs that seems to be related to
    class loading.
    
    My configuration:
    Tomcat 5.0.27
    Oracle 9i
    ojdbc14.jar is in $CATALINA_HOME/common/lib (and nowhere else)
    The datasource is configured in server.xml
    
    Everything works perfectly as long as I don't configure the datasource
    in the server.xml file (including reading/writing BLOBs).
    
    Once I use the datasource configuration in server.xml everything
    except Oracle's BLOB implementation works (means: I can access the
    tables, insert, select etc., but I can't read/write BLOBs)).
    
    The problem is with class loading:
    
    System.out.println(getConnection() instanceof
    oracle.jdbc.driver.OracleConnection);
    System.out.println(getConnection().getClass().getName());
    
    results in:
    false
    oracle.jdbc.driver.OracleConnection
    
    So the connection is of the expected type, but the type has been
    loaded with the wrong class loader. This leads to a ClassCastException
    in the Oracle JDBC driver (createTemporary()).
    As I told you the JDBC driver is in common/lib and nowhere else, so
    the class should be available in the application code.
    
    Any hints ?
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  - Communicating with a servlet using NIO?Is it possible for a client applet to communicate with a servlet using NIO?
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    servlet that accepts NIO connections from clients and interacts with them.
    Is this possible? I don't want to use a special port because of firewall
    considerations.
    
    --
    And loving it,
    
    -Q
    _________________________________________________
    email***@***.com
    (Replace the "SixFour" with numbers to email me)
- 10
  - Snake Sex 1827email***@***.com wrote:
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    leave it out! this is a java programming news group!
    
    try comp.lang.python
    
    W'ell just hang here having a wonderful erm.... "Classy" time! [groan]
- 13
  - 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;
    
    }
    /*-------*/
- 15
  - CeWolf and JSPHi, I'm Claudio, I'm a student and I want to use ceWolf for my graphs
    in JSP pages. I visited the web site http://cewolf.sourceforge.net/
    and i followed each pass of the tutorial but I don't visualize the
    chart, there is an exeption: NullPointerException in cewolf_jsp.java
    row 202:
    int _jspx_eval_cewolf_img_0 = _jspx_th_cewolf_img_0.doStartTag();
    
    In the JSP, if I delete this row:
    <cewolf:img chartid="line" renderer="cewolf" width="400"
    height="300"/>
    all go ok, but obviously there isn't the chart.
    
    Could you help me, please!
    Thanks, Claudio
- 15
  - 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

Author

Message

Michael.Milonov@gmail.com

Posted: 2007-6-10 0:18:00

Top

java-programmer, Java inherited annotations Hello all!

Some times ago the problem was raised... I and my collegs started to
use Java annotations and noticed that our annotations those was made
for java interfaces and their methods didn't accessible in inherited
classes and interfaces... I tried to use the metatag @Inherited but IMHO
it doesn't work correctly. Anyway we have made our own realization of
inherited Java annotations and shared it. So u can use it if you want.
It is free and open source. Can be downloaded from here:
http://www.fusionsoft-online.com/annotation.php

Best Regards,
Michael Milonov

Michael.Milonov@gmail.com

Posted: 2007-6-10 0:26:00

Top

java-programmer >> Java inherited annotations Hello all!

Some times ago the problem was raised... I and my colleague started
to
use Java annotations and noticed that our annotations those was made
for java interfaces and their methods didn't accessible in inherited
classes and interfaces... I tried to use the metatag @Inherited but
IMHO
it doesn't work correctly. Anyway we have made our own realization of
inherited Java annotations and shared it. So u can use it if you
want.
It is free and open source. Can be downloaded from here:
http://www.fusionsoft-online.com/annotation.php

Best Regards,
Michael Milonov

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    catch (Exception e)
    {
    System.out.println(e.toString());
    }
    }
    
    }
- 9
  - Why jdk-1.5.0 and diablo-jdk-1.5.0 does not containOn Tue, Jan 08, 2008 at 01:04:22PM +0300, Alex Pivovarov wrote:
    > Could you tell me why jdk-1.5.0 and diablo-jdk-1.5.0 does not contain
    > sunpkcs11.jar in jre/lib/ext?
    > Or I was doing something wrong when I install them. I use default options --
    > the only think I uncheck is browser plugin.
    
    Because the source code and build infrastructure aren't included for either
    the JAR or the native library in the source that Sun distributes(*). You
    could copy the included Linux/Solaris JARs over, but then you need to build
    the corresponding native library somehow.
    
    * - Actually, the source is there, but its bundled up and there is no
    build infrastructure.
    
    Thats my recollection at least.
    
    --
    Greg Lewis Email : email***@***.com
    Eyes Beyond Web : http://www.eyesbeyond.com
    Information Technology FreeBSD : email***@***.com
    _______________________________________________
    email***@***.com mailing list
    http://lists.freebsd.org/mailman/listinfo/freebsd-java
    To unsubscribe, send any mail to "email***@***.com"
- 10
  - If I write java program for Windows, will it run on a PDA or Cell Phone?I guess that says it. I want to write a tool to use on my PC, but I
    would like it to run on Linux, and a Palm or some other PDA, or a Cell
    Phone. It would be a pretty simple program.
    
    Thanks a lot...
- 11
  - C++ programmer stumbles over pass by value. Need advice.Here's a model of my problem. I see what's causing it (thinking in C++,
    with pass by reference) but I don't see a Java way to solve it. Probably
    because I'm so new to Java.
    
    Here's the problem.
    
    2 methods inside the same class. Method1 passes a String array to
    method2, relying on method2 to process the string array and return a
    String and a new String array for further processing back to method1.
    
    public boolean method1 (String s1, other args)
    {
    //do some stuff
    String [] sa1 = null; // to be created and returned by method2
    String s2 = null; // to be created and returned by method2
    
    Method2(s1, sa1, s2)l
    
    //do some important stuff with sa1 and s2
    
    return true;
    }
    
    // C++ type method (unfortunately)
    private void method2 (String s1, String [] sa1, String s2)
    {
    //do some stuff
    StringTokenizer st = new StringTokenizer(s1, "/");
    
    String sRemainder;
    
    sRemainder = st.nextToken();
    s2 = st.nextToken(); // just a string to be returned
    
    sa1 = sRemainder.split(","); // a string array to be returned
    }
    
    The eclipse debugger confirms that method 2 is processing the strings
    exactly as I want it to. sa1 and s2 after the processing look great
    inside method 2. But they're null after the return to method1. I assume
    this is because sa1 and s2 are copies inside method 2 and they go out of
    scope on the return. sa2 and s1 are created inside method2 but I need
    them for further work in method 1.
    
    I obviously coded this like a C/C++ programmer. What I'd like to know is
    what's the conventional methodology (or programming idiom) for passing
    back lots of stuff created in one method to it's caller? Feel free to
    hack up the above example to show me how, if it's convenient.
    
    Thanks in advance for your help/
    
    Lenny Wintfeld
- 12
  - Vendor independent data sourceI have an application that I deployed to WebSphere using the default
    Struts datasource from it's action. I've been reading about this now
    and it sounds like this is not the prefered way to make a database
    connection pool. They suggest using the containers, but I want to
    remain vendor independent and be able to deploy my application in any
    container with little or no changes.
    
    I know there must be a standard non-vendor specific way to create a
    connection pool. Can someone tell me what that standard is? Searching
    the web just provided me with about 100 different ways to do it, but I
    want the "Java Standard" way to do this.
    
    Thanks,
    Smitty
- 13
  - Validating parsed XML document against XML-schema*PROBLEM: how to validate parsed XML document against (parsed) XML-schema.
    
    *IN: XML document as org.w3c.dom.Document, XML-schema as stream
    
    *OUT: information if document is valid against schema. If document is not
    valid DETAILED information about ALL errors (especially: node that caused
    problem).
    
    *Additional information:
    
    - validation is performed quite often,
    
    - XML-document object is changed quite often,
    
    - XML-Schema is fixed.
    
    - XML-document doesn't contain information about related XML-schema
    (attr xsi:noNamespaceSchemaLocation)
    
    - XML-Schema is available as file only when the application starts.
    It means that schema can be loaded from a file only once.
    
    - must works in Java1.4+
    
    I've tried to implement it using JAXP:
    
    //app start
    
    SchemaFactory schemaFactory =
    
    SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
    
    Source schemaSource = new StreamSource(new File(schemaFile));
    
    Schema schema = schemaFactory.newSchema(schemaSource);
    
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    
    DocumentBuilder builder = factory.newDocumentBuilder();
    
    Document document = builder.parse(xmlFile);
    
    //document is being changed usign .addChild etc.
    
    //
    
    Validator validator = schema.newValidator();
    
    validator.setErrorHandler(new SimpleErrorHandler());
    
    validator.validate(new DOMSource(document));
    
    Unfortunately org.xml.sax.ErrorHandler gets only SAXParseException which
    doesn't constant information about node that caused the problem.
    
    Is there any other way to validated DOM-document?
- 14
  - OMG SPAM IT AGAIN AGAIN!!!!!!! abuse@telus.comemail***@***.com wrote:
    >
    > http://
    
    email***@***.com
    
    --
    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.
    
    Michael A. Terrell
    Central Florida
- 15
  - Help using TexPadIs there anyone here who knows how to use TextPad for a programming editor?
    I sure could use the help. The instructions in help don't really explain
    what to do. It says I'm supposed to see something but it isn't there, i.e.
    I'm supposed to click on "Configure" then "Tools" then "Add" and I'm
    supposed to click on "Java SDK Commands" and that command is not listed.
    What do I do??
    
    Thanks
    
    Pete