java-programmer >>JMF, FrameAccess, sound, faster processing

JMF, FrameAccess, sound, faster processing

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- 3
  - Action or Subclass method?I need to know which is the PROPER way of handling this situation:
    
    I would like to be able to cascade all the JInternalFrames in a
    JDesktopPane.
    
    Should I create a
    
    1) cascade() method in a subclass of JDesktopPane? or
    
    2) create a CascadeAction (a subclass of AbstractAction) and pass a
    reference of the JDesktopPane?
    
    Both ways work. HOWEVER, which is the PROPER Object Oriented solution?
- 3
  - How to listen out for a stream of data coming from (web)serverHello
    
    I have an applet that connects to a server (same location as web server) and
    connects to a server on a socket. This all works fine for sending commands
    to this server. But the server can send data to the client at any moment in
    time. So how do I listen out for the activity? do I launch a separate thread
    that sits listening for incoming data?
    
    What is the way to do it?
    
    Angus
- 4
  - for wanids: very enticing tunes - gudri wonhe - (1/1)On Tue, 06 Sep 2005 23:52:20 +0200, bone wrote:
    
    > Hello all?
    Oh, ..you too?
    
    This sh*t is commonly known as SPAM. Stop it, before I
    have to send the boys around.
    
    --
    Andrew Thompson
    physci.org 1point1c.org javasaver.com lensescapes.com athompson.info
    "Who gave you the power? WE DID!!"
    Alice Cooper 'Department of Youth'
- 4
  - How to Fail at Software DevelopmentHello,
    
    The book "How to Fail at Software Develoopment" is about all the
    strange and funny things people do in the name of developing software.
    I worked in software development for over 20 years and found silly
    things that were being done in the name of software development were
    being repeated again and again. As a matter of fact, most things that
    cause software projects to fail are forever being repeated. And you
    can spot the symptoms if you know what to look for.
    
    Most people running software projects don't have much software
    experience, so their inventions are usually not new. They rediscover
    the same mistakes over and over again. It turned out to be a book of
    very funny scenarios--some I lived through, and some were lived
    through by others.
    
    Those who don't know the history of software failure are doomed to
    repeat it. You can find the book on Amazon or wherever.
    
    Arthur Griffith
    "How to Fail at Software Development"
    http://www.anchorpointbooks.com
- 7
  - Printing using CUPS in Linux and Java 1.5According to the blurb one of the upgrades in 1.5 is the ability to
    print using CUPS in Linux. Does anyone have this working? I cannot get
    my Jva application to communicate with CUPS.
    
    Thanks,
    
    Alan
- 7
  - openGL java and X - server: a crashHy folks,
    I didn't know exactly where to post, in the end I decided for this
    forum, since we are talking about java, GL4java on linux environment.
    
    We are developing a java interface for the GIS GRASS
    (http://grass.itc.it) using GL4java calls for raster visualization.
    
    I'm not the developer that works on the GL part. On his computer
    everything compiles and works alright.
    
    When I run the application, when the first GL call comes (i assume
    so), the X server shuts down and restarts. In the /var/log/message the
    only line that defines what happened, is:
    kdm[2232]: Server for display :0 terminated unexpectedly
    Nothing else!
    
    I use Suse 9 (I upgraded from 8.2 hoping to solve that problem, but no
    way) which a Toshiba Satellite 5200-801 which loads an NVIDIA GeForce4
    460 Go.
    I downloaded and installed the drivers supplied by Nvidia and they
    work perfect for everything but this.
    
    I know NVIDIA to be unstable with linux nowadays, but I can't work
    this way!
    Has anyone encountered the same or similar problem?
    
    Regards,
    Andrea
- 7
  - Extract all dates from text documentHi,
    
    1) I have a bunch of documents, some of which may contain dates.
    2) For each document, I would like to identify all existing dates.
    3) The dates exist in multiple formats.
    Example: (May 5, 1932), (5,5,1932), (5/5/1932), (5-5-1942) etc.
    4) I would like to process a single document very quickly. In other
    words, i'm looking for a time efficient solution.
    
    Are there any existing parsers that take in a generic text string and
    return a collection of dates found in the text string?
    
    Are there any existing flex/cup files that perform this task?
    
    Thanks.
- 9
  - Oracle JDBC and AppletHello
    I have an applet which download files to local computer from database
    (files are saved as BLOB fileds).
    Applet is signed bud when I want to get connection to Oracle (method
    getConnection from OracleDataSource) i have following error:
    
    java.security.AccessControlException: access denied
    (java.util.PropertyPermission oracle.jserver.version read)
    
    Applet working only when I running it from JBuilder. Otherwise the
    error comes.
    
    I can't see other posibility than using applets because number of
    files is very big. For example 20 000 to take at once, so the normal
    download method via http is not good here. Also the size of one
    download may be up to 1GB.
    
    Thanks for help
    
    Bartek
- 11
  - applet is not initiallising.what's wrong with this source code.
    
    it is showing the message applet is not initiallising.
    --------------------------------------------------------------------------------------------------------------------------------------
    import java.awt.*;
    import java.awt.event.*;
    import javax.swing.*;
    
    public class LinearSearch extends JApplet implements ActionListener
    {
    JLabel enterLabel;
    JTextField enter;
    JTextArea outputArea1, outputArea2;
    JButton search;
    String output;
    int a[];
    
    public void init()
    {
    a=new int[Integer.parseInt(JOptionPane.showInputDialog("how many
    numbers, you want to input:"))];
    
    for(int i=0; i<a.length; ++i)
    a[i]=Integer.parseInt(JOptionPane.showInputDialog("enter the
    integer number."));
    
    output="numbers are:\n";
    for(int i=0; i<a.length; ++i)
    output += " "+a[i];
    
    for(int i=1; i<a.length; ++i)
    for(int j=0; j<=a.length-1; ++j)
    if(a[j]>a[j+1])
    {
    int t=a[j];
    a[j]=a[j+1];
    a[j+1]=t;
    }
    
    output += "\n\nnow numbers are in ascending order.\n";
    for(int i=0; i<a.length; ++i)
    output += " "+a[i];
    
    Container c=getContentPane();
    c.setLayout(new FlowLayout());
    
    outputArea1=new JTextArea();
    c.add(outputArea1);
    outputArea1.setText(output);
    
    enterLabel=new JLabel("enter the number, you want to search.");
    c.add(enterLabel);
    
    enter=new JTextField(10);
    enter.addActionListener(this);
    c.add(enter);
    
    outputArea2=new JTextArea();
    c.add(outputArea2);
    
    search=new JButton("new search");
    search.addActionListener(this);
    c.add(search);
    }
    
    public void actionPerformed(ActionEvent e)
    {
    if(e.getSource() == enter)
    {
    int subscript=linearSearch(a,
    Integer.parseInt(e.getActionCommand()));
    
    if(subscript != -1)
    outputArea2.setText("number found at position no. "+subscript+"
    in the sorted list.");
    
    else
    outputArea2.setText("Sorry!!! number not found. \n\nhave a look
    on new search");
    }
    
    else
    JOptionPane.showMessageDialog(null, "Please click on the Applet
    menu on the menu Bar.\n"+"click on the clone option.\n"+"Repeat the
    search process again.");
    }
    
    public int linearSearch(int b[], int k)
    {
    for(int i=0; i<b.length; ++i)
    if(b[i] == k)
    return i;
    
    return -1;
    }
    }
    
    ---------------------------------------------------------------------------------------------------------------------------------------
    it is asking for no. of elements. and input the numbers. but after then
    applet is not able to initialise.
- 11
  - tridimensional view in B&WI made a program with java3d and I can print views from it.
    I want to print only the lines like the wireframe but without hide lines
    
    Have you same Ideas??
    
    zeno
- 12
  - Windows styleHI! I'm developing an application that is going tu run on windows XP
    Professinal, and I want that the buttons, combo boxes etc every
    component that I use, looks like a windows component, not like a swing
    button for example. I don`t know if anyone understands me.
    I'm using NetBeans IDE, (using jdk 1-4-2).
    
    When I am designing my form and I drag and drop a button for example,
    it has a rounded shape, like a normal windows button, but when I
    compile and run my project, the button is not rounded anymore, and
    doesn't looks like a Windows Button.
    What can I do??
    Thaks a lot!!
- 13
  - OLAP & OLTP schemas and Java App ServerHi,
    
    (I hope this is the right group to post this. If not I apologize and
    would appreciate pointers.)
    
    We have a Websphere Applicaiton server for our application. We plan to
    have a database that is part relational and part star on DB2 UDB. We
    will need an OLAP tool and may use BRIO.
    
    Some questions on this approach:
    
    1. What is the best way to access the OLAP schema from Java (we plan
    to use hibernate but are concerned about its suitability for star
    schemas).
    Some things that I could think of are:
    - Use hibernate on the star schema (not sure if this is the best)
    - Create as many materialized views as necessary and use hibernate
    - Use java objects running on the DBs JVM (db optimized jvm implying
    better performance?)
    
    2. Is Brio the right tool to use for this scenario?
    I ask because we can't have direct integration with the J2EE
    applicaiton server (We have to give the user a different login page to
    brio to see the reports. But they may take hours to produce.)
    
    3. What are your experiences in combining star and relational tables
    in the same database?
    
    4. Any thoughts on using DB2 OLAP server? Apparently it has reporting
    capabilities and Java support, but unsure if it has any advantages
    over Brio.
    
    Thanks in advance,
    Naga
- 14
  - JNI QuestionOn Mar 2, 2:17 pm, Gordon Beaton <email***@***.com> wrote:
    > On 2 Mar 2007 08:05:22 -0800, Edsoncv wrote:
    >
    > > If I have only the C part, I would cast the "native1" object, pass
    > > to "setup" and cast back the object, but since the setup function is
    > > called from java, I don't know how to access native1 object from
    > > "setup". Is it possible?
    >
    > Of course.
    >
    > Either store it someplace in the native code where it's visible to
    > both methods (i.e. not as a local variable in solve() like your
    > example).
    >
    > Or, remembering that even native methods have return values, return it
    > to the caller (cast to jlong) so that it can be passed back to the
    > next method, where you cast it back to the appropriate pointer type
    > before attempting to use it.
    >
    > /gordon
    >
    > --
    > [ don't email me support questions or followups ]
    > g o r d o n + n e w s @ b a l d e r 1 3 . s e
    
    Thanks Gordon, I think I'll pick the second option.
- 16
  - reading Mouse MOVE events without moving pointerHi,
    
    Does anyone know of way of setting up a java app so that a instead of
    mouse movements being used to update the pointer, the mouse move could
    be used to update, say, the viewport of a document?
    
    An example in more detail;
    what I want to do is use the mouse MOVE event that is caused by the
    movement of the mouse, but not update the pointer position (I would
    like the pointer to remain still or be invisble) but to allow me to
    update the viewport on a document. ie, user presses a 'trigger' key
    to put the code into a receptive mode, then all subsequent mouse
    movements (triggering mouse MOVE events) can be captured and used to
    update the viewport location- ie, mouse moves left, pointer remains
    still, viewport moves left.
    
    I don't know if this is possible due to the OS independance that java
    has. Maybe a solution involves the glass-pane in some (I am not
    familiar with the glass- yet. It is one of my avenues to search...)
    
    Thanks for any ideas... mucho thanks for any code examples....
    
    M.
- 16
  - about static variableViv,
    
    Viv wrote:
    >I mean to say that the objects will get garbage collected but not the
    >static variables. Class will remain in memory till the JVM shutdown.
    >
    >Roedy wrote :
    >The only way you can recover the ram from a static class object is to
    >load it with a custom classloader, then drop even the reference to the
    >class loader.
    >
    >You can try what Roedy said.
    
    What means "recover the ram from a static class object"? What do you mean
    "recover"? I think there is not static class object -- only static class
    members.
    
    Do you know where can I find a sample dealing with how to write a customized
    ClassLoader with the functions as you mentioned?
    
    regards,
    George
    
    --
    Message posted via JavaKB.com
    http://www.javakb.com/Uwe/Forums.aspx/java-setup/200511/1

Author

Message

Boris Gorjan

Posted: 2006-2-21 18:29:00

Top

java-programmer, JMF, FrameAccess, sound, faster processing I used JMF's example class FrameAccess to process audio/video files. The
Processor processes data according to the frame rate specified in the file.

1. Is there a way to do this processing faster? I don't want to view (and listen
to) those vids, just process them. I'm ready to use 100% of the CPU if need be.

2. As the file is processed, a sound is generated and can be listened to through
a sound card's output. Is this entirely necessary? I'm asking because I want to
process files simultaneously and that would result in a cacophony. Besides, say
I want to listen to my own music while the processing takes place.

3. How does one extract sound from a video file? Can it be extracted as a whole?
Can it be broken down into chunks according to extracted image frames? How? In
which formats? I'm stuck in an implementation of Codec interface, much like
JMF's example PreProcessCodec.java, but with AudioFormat (supported ins and
outs), so I can access a sound frame through a Buffer, but I don't know how to
proceed.

Thanks for any insight.

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- 1
  - Sun's OpenJDK in Debian?Hi,
    
    I'm surprised that this wasn't discussed already in the past on this list
    (or in the BTS of some important java packages), but what is the status
    of Sun's Java architecture in Debian?
    
    It is licensed under GPL2 and should be compatible with DFSG.
    
    As far as I know only a few components are not yet freely available,
    especially all which are subject to the Assembly Exception
    (http://openjdk.java.net/legal/exception-modules-2007-05-08.html,
    http://www.sun.com/software/opensource/java/faq.jsp).
    
    Is this the main blocker for accepting OpenJDK in Debian? Would it be
    possible to just omit the binary modules or to replace these with free
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    Please CC: me.
    
    Jens
    
    --
    To UNSUBSCRIBE, email to email***@***.com
    with a subject of "unsubscribe". Trouble? Contact email***@***.com
- 2
  - RSA ciphered streams problemHi. I've got a problem with the RSA ciphered streams. Here is a piece of
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    KeyPair kp = gen.generateKeyPair();
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    oout.flush();
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    CipherInputStream cin = new CipherInputStream(new
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    oin.close();
    
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    My question is : can anybody tell me why it happens? What should I do to
    write "big" objects to ciphered output stream using ObjectOutputStream
    properly?
    Thanks for any requests.
    
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- 3
  - Loop != LoopStephen Riehm schreef:
    >
    > don't those two loops have different semantics, ie: the scope of myvalue?
    > My understanding would be that myvalue in the first loop would be
    > overwritten 9 times and then the last value would be available to code
    > appearing after the loop. The myvalue in the second loop basically has
    > no effect because it falls out of scope (and into the garbage
    > collector's hands) as soon as you leave the loop.
    >
    
    Oh, it was just a quick example, there supposed to be done something
    with myvalue later in the loop. The point was, myvalue is only needed
    inside the loop and not outsite.
    
    int myvalue=0;
    for (int i=0;i<10;i++) {
    myvalue=calculate(i);
    .. do something with myvalue
    }
    .. myvalue no longer needed
    
    for (int i=0;i<10;i++) {
    int myvalue=calculate(i);
    .. do something with myvalue
    }
    ..my value not needed anymore
    
    I believe this example is somewhere on the web too, but I forgot where
    (probably javasoft.com or javaworld.com).
- 4
  - Putting certificates in ldapI have openldap running, and I was able to put java objects there like
    so:
    
    Integer i = new Integer( 28420 );
    ctx.bind( "cn=myRandomInt", i );
    
    Suppose I already have the cert inside java.security.cert.Certificate
    . What would be the correct syntax to add this cert with ctx.bind ? Do
    I need to explicitly add this userCertificate;binary to slapd.conf? My
    schema is:
    
    database ldbm
    #suffix "dc=my-domain,dc=com"
    suffix "o=certStore"
    #rootdn "cn=Manager,dc=my-domain,dc=com"
    rootdn "cn=certManager,o=certStore"
    # Cleartext passwords, especially for the rootdn, should
    # be avoid. See slappasswd(8) and slapd.conf(5) for details.
    # Use of strong authentication encouraged.
    rootpw secret
    # The database directory MUST exist prior to running slapd AND
    # should only be accessible by the slapd/tools. Mode 700 recommended.
    directory /var/lib/ldap_magna
    schemacheck off
    # Indices to maintain
    index objectClass eq
    
    Please help,
    iksrazal
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    FreeQueryBuilder is a GUI SQL client written in 100% Java.
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    Works with any JDBC compliant database, including
    ORACLE, MySQL, HSQLDB, Firebird, SQLServer.
    
    This release includes FreeReportBuilder, a visual report designer.
- 6
  - Passing large C buffers to Java (via JNI) without copying?I'm trying to determine whether this is even possible... I have a
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    over to Java, preferably as a Byte[]. So far, every example of this
    that I have come across involves _copying_ the data from my C buffer
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- 7
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- 8
  - GeronimoIs there anyone who has successfully run this
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- 9
  - Question regarding Java's OOP implementation.According to Wikipedia, one of the core concepts of OOP is
    Encapsulation; being defined as follows: "ensuring that users of an
    object cannot change the internal state of the object in unexpected
    ways; only the object's own internal methods are allowed to access its
    state. Each object exposes an interface that specifies how other
    objects may interact with it. Other objects will rely exclusively on
    the object's external interface to interact with it." Not that I
    regard Wikipedia's definition of OOP as the leading authority, it just
    happens to be handy and provides a definition that fits my own ideas.
    On to the question; If I create a class called AClass and inside
    declare a class level variable with the private modifier and some other
    methods, e.g.
    
    public class AClass {
    
    private int number;
    
    public AClass(int num) {
    number = num;
    }
    
    public void setAnotherAClass(AClass anotherAClass, int num) {
    anotherAClass.number = num;
    }
    
    public int getAnotherAClass(AClass anotherAClass) {
    return anotherAClass.number;
    }
    
    public void display() {
    System.out.println("Number: " + number);
    }
    }
    
    And a class to test AClass:
    
    public class Test {
    
    public static void main(String[] args) {
    
    AClass one = new AClass(1);
    AClass two = new AClass(2);
    
    one.display();
    two.display();
    
    one.setAnotherAClass(two, 3);
    two.display();
    }
    }
    I would expect the compiler first to complain that number has private
    access in AClass... Barring that I'm not sure what I'd expect it to
    complain about, but something doesn't seem right. Child classes
    derived from AClass were not able to make changes to objects of type
    AClass which is what I would expect. But because one and two are
    distinct objects the fact that they belong to the same class shouldn't
    mean they can change each other's private instance variables. I
    wasn't able to find anything directly relating to the question in an
    hour or so of Googling. I also read through Java's tutorials on OOP to
    see if they had anything specific to say, which they did not.
    
    Thank you for your time and ideas.
    
    Carl Summers
- 10
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    Btw. after each block of text I write an end-of-block string to know that
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    Here's the explanation in code:
    
    String notes = ""; // the result
    String lin = ""; // used to read one line from the file
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    while (lin.compareTo(eob) != 0) {
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    lin = filein.readLine();
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    filein = new BufferedReader(
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- 11
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    Doesn't exists a method to upload the defaul file properties of J2SE
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    Exists e method to change the propeties of the logger at runtime? for
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  - Opening Image files with IE as default always ( using Browser Launcher)Hi,
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    I could not see the image in Internet Explorer when I am trying to
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    Some trasfer details..
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    can anybody suggest me that,
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- 14
  - Date problem"Simon" <email***@***.com> wrote in message
    news:email***@***.com...
    > Ingo R. Homann wrote:
    >> You could design a programming language whose array-indices start with
    >> -3, that would make as much sense.
    >
    > So you want array-indices to start with 1? I don't see the analogy.
    
    It's the princple of least surprise. When you design something, you want
    to surprise your users as little as possible. To me, it's quite surprising
    that 5 refers to June and not May, for example. For array-indices, starting
    at 1 or 0 is okay (both makes sense), but -3 or 42 or anything else would be
    quite surprising as well.
    
    - Oliver
- 15
  - What IDE for Java do you use?nospam wrote:
    > Hi...All,
    >
    > I recently downloaded eclipse IDE with myeclipse web editor
    > (myeclipseide.com) . I did not see any views on it in this thread. So,
    > would be interested to what your thought are on
    > eclipse+myeclipse(struts, EJB....)
    
    The views in Eclipse aren't initially as elaborate as those under WSAD,
    but you can change that;
    http://help.eclipse.org/help31/index.jsp?topic=/org.eclipse.platform.doc.user/gettingStarted/qs-02e.htm
    and
    http://help.eclipse.org/help31/index.jsp?topic=/org.eclipse.platform.doc.user/gettingStarted/qs-02e.htm
    are a good start. Look on sourceforge.net for a variety of plug-ins so
    you can enhance your IDE even more. Eclipse Colorer may be of help:
    http://eclipsecolorer.sourceforge.net/index_profiler.html and
    http://sourceforge.net/projects/eclipsecolorer.