java-programmer >>Meaning of Java Open Source??

Meaning of Java Open Source??

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- 6
 - How come DefaultTreeCellRenderer's behaviour changes when called from different directories ?!?Hi,
 I use the following lines in a TreePanel class I've written:
 > DefaultTreeCellRenderer rend = new DefaultTreeCellRenderer();
 > rend.setLeafIcon(null); rend.setClosedIcon(null); rend.setOpenIcon(null);
 > tree.setCellRenderer(rend);
 to see to it that when displayed, my tree will be as plain as can
 be (no icon at all, no default small picture on the line where you
 click to expand the node etc.).
 
 When I use this class with a certain app., it works, I get what I
 want, the tree appears in a thin black dotted line, with a little
 squares containing a '+' sign when the nodes are closed, and a '-'
 when they're expanded; but in another app. (I use THE VERY SAME
 CLASS, the same .class file) instead of the small square with '+'/'-'
 I have the Sun default small picture of a node you see ?, a tiny
 circle with a dot in its middle and a little hyphen, and the line
 is blue pale.
 
 Anyone can explain me this behaviour ??
 
 Thanks...
 Regards,
 Spendius
- 8
 - jstl does not work with foreachI am testing jstl, here is my jsp:
 
 <%@ page language="java" contentType="text/html" %>
 <%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %>
 <html>
 <body>
 <table border=1>
 <tr>
 <th>Value</th>
 <th>Square</th>
 </tr>
 <c:forEach var="x" begin="0" end="4" step="2">
 <tr>
 <td><c:out value="${x}"/></td>
 <td><c:out value="${x * x}"/></td>
 </tr>
 </c:forEach>
 </table>
 
 </body>
 </html>
 
 But the output in web broswer is :
 
 Value Square
 ${x} ${x * x}
 ${x} ${x * x}
 ${x} ${x * x}
 
 Why?
 
 Thanks,
 
 qq
- 10
 - JACOB: ComFailExceptionHi!
 
 I am using JACOB to automate Ms-Word. but when i am adding/opening a
 document it shows an exception.
 MS-Word get opened and visualized but no document has been opened
 there.
 Plz help me to sort out this problem.
 
 Code:
 ActiveXComponent dc = new ActiveXComponent ("Word.Application");
 try
 {
 dc.setProperty("Visible", new Variant(true));
 
 //I've tried this way also, but in vain
 //Dispatch documents = Dispatch.get(dc,
 "Documents").toDispatch();
 
 //This line generates exception.
 Dispatch documents =
 dc.getProperty("Documents").toDispatch();
 Dispatch document = Dispatch.call(documents,
 "Add" ).toDispatch();
 
 }
 catch (Exception e) {
 e.printStackTrace();
 }
 
 Exception:
 com.jacob.com.ComFailException: Invoke Failed: Documents
 at com.jacob.com.Dispatch.invokev(Native Method)
 at
 com.jacob.activeX.ActiveXComponent.getProperty(ActiveXComponent.java)
 at Word.getDocuments(Word.java:17)
 at WordDoc.main(WordDoc.java:20)
- 11
 - Tomcat - Invalid Direct Reference To Login Page ( Workaround help )Hi,
 
 I'm really happy that the "Invalid Direct Reference To Login Page" has
 finally been fixed. However I am stuck using Tomcat 4.0.x ( and I
 cannot recompile the app-server as it is a managed resource ) , and
 the requirement to have a login box included in each page via a panel
 is still there.
 
 I've been looking for a workaround. According to the FormAuthenicator
 Tomcat code, if the requestURI in the request is NULL, then the
 "Invalid Direct Reference To Login Page" error is thrown.
 
 I've written a proxy servlet called LoginProxy. Its job was to alter
 the requestURI in the request object before posting to the
 j_security_check target.
 
 My login form would post to something like:
 
 LoginProxy?j_username=my&j_password=test&j_forward_uri=/index.jsp
 
 Great, apart from one small problem - HttpServletRequest is READ ONLY.
 Damn. I had a look at the actual class heirarchy, and found that
 HttpServletRequestFacade was the class that implemented
 HttpServletRequest for Tomcat ( I am prepared write Tomcat specific
 code, as long as it doesn't involve changing Tomcat itself. ).
 HttpServletRequestFacade extends HttpServletRequestImpl, which
 implements HttpRequest. HttpRequest does have write access, however
 the code:
 ( ( HttpRequest ) a_Request ).setRequestURI( sForward )
 gives a ClassCastException.
 
 My other thought, was - if I just do a sendRedirect ( I was using
 forward before ), won't the requestURI be the url of the LoginConfig
 servlet.... I could cope with tomcat forwarding me back to the
 servlet, I'd just have to add some extra logic. Alas, the request
 still retains the null indicating to requestURI.
 
 Can someone tell me how I can modify the request object, or even
 create a new one?
 
 Thanks
 
 Ben
- 11
 - JSP and response object sizeIs there any way to know the size of a JSP (amount of bytes sent in the
 response object)?
 
 We need to know the size of the generated JSP when they are sent to the
 client. I can only ask for the buffer size... but no the real amount of
 bytes sent in the response object.
 
 Any idea???
 
 Thanks in advance
- 11
 - the iPhone Widget List!wow, already many apps / widgets for the iPhone and the thing doesn't
 ship for 55ish hours! expect 1000's of these in a few months... they
 really make apps on any other mobile phone obsolete!
 
 http://www.iphonewidgetlist.com/
 
 Those guys are sooooo screwed!
 
 Learn how to make them fast, here:
 
 http://webkit.org/blog/?p=87
 
 Check the left side for the tools...
 
 -
- 11
 - How to build a class w/ return value?I apologize for a newbie question, but I'm just starting with Java.
 
 I'm trying to write a program which includes a class for checking if a
 given text field has a value.
 
 My basic logic would run something like:
 
 A button is pressed
 On that event, check if a text field has a value
 if it does, return true, else return false.
 
 So, I want to say in the action listener event for that button something
 like:
 
 if ( checkValue( txtFieldName ) == true)
 do something
 else
 do something else
 
 I'd then have a public funciton for checking the value
 
 public checkValue( String txtFieldName )
 {
 if ( txtFieldName == "" )
 return false;
 else
 return true;
 }
 
 This keeps giving me an error that a return code is needed for a public
 class. If i put void in the class, I can run it but then nothing gets
 returned.
 
 Now, a bit of background - I've been doing VB for 12 years, so maybe my
 thinking is flawed. If so, is there another way of going about this? I've
 googled for the past hour and am very frustrated.
 
 --
 kai - email***@***.com - www.perfectreign.com
 
 kai:/> format a:
 Error: The DOS concept of formatting disk media is screwed.
 To format a floppy, use "fdformat /dev/fd0"
 and then "mkfs.minix /dev/fd0".
- 11
 - OpenMapHello to all, I have a GREAT problem: I am using OpenMap in order to
 realize one application GIS. I must implement the analysis function
 spaces them "buffering" similar to that one of Arcview GIS. Who
 knows to say me as I make to trace a polygon around to the cities as an
 example? how I can find the coordinates just in order to make this?
 Thanks.
- 13
 - Thread.sleep(10000)Is that true Thread.sleep(10000) will make current thread to sleep for
 10 seconds?
 
 I cannot use Thread.currentThread().sleep(10000) since sleep is a
 static method of Thread. Right? Thread.currentThread() will return a
 reference to the currently executing thread object.
- 13
 - Jar: protocol questionI've been using the Jar: protocol a bit in the last few days and I'd like to
 know if this is a valid use of that protocol:
 
 jar:file:!/Images/foo.gif
 
 Basically, I'm trying to describe the location of a GIF that a program
 should be able to find in one of the various jars that are on the classpath
 used by the program.
 
 Since 'this.getClass().getResource()' will search EVERY jar in the classpath
 for the desired file, it shouldn't be necessary to specify the jar name.
 Therefore, it seems to me that this should be valid notation for indicating
 that the jar name isn't necessary in this case: the bang ('!') in the name
 following the 'file:' suggests to me that the default jar(s), namely all of
 the jars found in the classpath, will be searched for an Images directory
 and a file named foo.gif within that directory.
 
 Does that seem reasonable? If not, can anyone suggest a better notation to
 use for my situation?
 
 I can't find any discussion of this "special case" in the articles I've seen
 about the Jar: protocol.
 
 --
 Rhino
 ---
 rhino1 AT sympatico DOT ca
 "There are two ways of constructing a software design. One way is to make it
 so simple that there are obviously no deficiencies. And the other way is to
 make it so complicated that there are no obvious deficiencies." - C.A.R.
 Hoare
- 15
 - delete all jvm'sI think I have a corrupt JVM on my machine. I would like to delete all
 JVM's and just install the sun JVM. Could anyone tell me how to delete
 all JVM's.
 
 Aidy
- 15
 - Write byte[] to filehi guys,
 what is the best way to write a byte array to a file?
 thanks a lot,bye
- 15
 - Proper use of CharsetDecoder?I have some text originating from XML which does not
 contain tags anymore but character references like "@" .
 
 I thought about writing my own java.nio.charset.CharsetDecoder only
 to find that this more or less forces me to also supply a my
 own java.nio.charset.Charset class ... and probably a CharsetProvider ...
 
 Since all I want is the conversion of "&64;" and the like
 to a Java char I don't see the point of defining a Charset. The
 CharsetDecoder alone would suit me well passed right into
 a new InputStreamReader(InputStream, CharsetDecoder).
 
 Certainly I misunderstand the importance of the connection between
 CharsetDecoder and Charset and should choose a different route.
 
 Should I implement my own Reader having the converions built in? This seems
 equally odd.
 
 Any other ideas?
 
 Harald.
- 16
 - Sound/Midi questionHi,
 
 I need to extract the outgoing pcm audio data while playing midi.
 
 With the getData() method of a SoundbankResource object,
 I can only catch sampled audio data stored in a soundbank.
 
 Is there any way I could catch (well, in real time more or less)
 the actual sampled data produced by the synth (channels mixed
 or unmixed) ?
 
 Any indications or links welcome. Tx !
 
 Ben
- 16
 - Spring MVC Data Binding and user-friendly error messagesDear Spring MVC experts!
 
 I am using a controller of type AbstractWizardFormController to
 implement a multi-page form entry workflow. This controller operates
 on a session-scoped command object which has a property of type
 java.util.Date. On page 3 of the wizard, the user enters a date into a
 textbox which will be bound to a java.util.Date property of the command
 object.
 
 In my controller, I am registering a custom editor as follows:
 
 protected void initBinder(HttpServletRequest request,
 ServletRequestDataBinder binder) throws Exception {
 DateFormat df = new SimpleDateFormat("MM/dd/yyyy");
 CustomDateEditor editor = new CustomDateEditor(df, false);
 binder.registerCustomEditor(Date.class, editor);
 }
 
 The data binding process is behaving as I would expect. If the user
 types an invalid date into the textbox, then the field cannot be bound
 and the framework adds a FieldError to the Errors object with code
 "typeMismatch". Unfortunately, this FieldError results in a very
 un-user-friendly error message being put on the screen. The text of
 the message is:
 
 "Failed to convert property value of type [java.lang.String] to
 required type [java.util.Date] for property billDate; nested exception
 is java.lang.IllegalArgumentException: Could not parse date:
 Unparseable date: "xyz" "
 
 It is not at all clear to me how to transform this ugly error message
 to a user-friendly message. I can think of a number of possible ways
 of doing this, but all seem overly-complex. Is there a standard way to
 map data-binding errors to user-friendly messages? Thanks in advance
 for your help.
 
 Regards,
 Craig

Author

Message

jrefactors

Posted: 2004-7-19 12:21:00

Top

java-programmer, Meaning of Java Open Source?? I have heard that Sun may open source Java. I don't quite understand
what does it mean
because when we install Java SDK, we get the source code of library
too. I tried
to search more info. on Sun's site, but unsuccessful.

Please advise, and share some related pointers. thanks!!

Gregory Toomey

Posted: 2004-7-19 13:48:00

Top

java-programmer >> Meaning of Java Open Source?? Matt wrote:

> I have heard that Sun may open source Java. I don't quite understand
> what does it mean
> because when we install Java SDK, we get the source code of library
> too. I tried
> to search more info. on Sun's site, but unsuccessful.
>
> Please advise, and share some related pointers. thanks!!

It means to place it under the GPL (General Public Licence) or similar.

For example, Sun now controls the syntax. If its under the GPL anybody could
extend or change the syntax, create new libraries, etc.

gtoomey

Michael Borgwardt

Posted: 2004-7-20 8:25:00

Top

java-programmer >> Meaning of Java Open Source?? Matt wrote:

> I have heard that Sun may open source Java. I don't quite understand
> what does it mean
> because when we install Java SDK, we get the source code of library
> too.

Read the license:
http://java.sun.com/j2se/1.4.2/j2sdk-1_4_2_05-license.txt

"Open Source" doesn't just mean you get a peek at the source code,
it also means you're allowed to change it and distribute such changed
versions. Sun's license explicitly forbids that.

Index ‹ java-programmer

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 "Hal Rosser" <email***@***.com> wrote in message news:<VFSyc.1054$email***@***.com>...
 > might want to break the gui up into more than one frame
 >
 > "Manish Agarwal" <email***@***.com> wrote in message
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 Dynamic Day'n'Night Worldmap by Urs Dudli and Peter Gehrig
 http://www.24fun.com
 
 and
 
 The JavaScript Source: Clocks: Universal Clock
 The JavaScript Source!! http://javascript.internet.com
 
 
 
 I believe that day n nite is the main problem because I tried several clock
 and date scripts with it, and none would work except without it, [or on
 pages by themselves]
 
 Could anyone on this group know what causes this, if there is a cure, or
 another group to try? I'd really like to have them both work!
 
 --
 Tommy McClure
 tommyATlee9_2000(removethis)ATyahooATcom
 www.hal-pc.org/~toner27
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 Can somebody help me ?
 
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 http://en.wikipedia.org/wiki/Delegate_(.NET)#Java_Example_using_PerfectJPattern
 
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 import java.awt.*;
 import java.awt.event.ActionEvent;
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 What do I need to overload/write/tweak to make sure "contains" finds the
 vector element if it is equal to the "theClass"?
 
 Is there some method I add to myClass to make the contains work?
 
 Thanks
 Jeff Kish
- 13
 - How to structurre the GUI for this MetronomoHello,
 I have necessity to realize a metronomo in java,
 it is also an occasion in order to understand something of user
 interfaces considering that until now I just be occupied in J2EE.
 I have to use use java.swing.Timer in order to color one of N circles,
 the problem is that N it is defined from the user and unlimited so I
 don't know how to arrange this in a modular project.
 My idea is the following:
 Frame with:
 BorderLayout South a JPanel with the inputs for metronomo
 BorderLayout Center a JScrollPane in which to design all the circles
 but I don't know if it is best to design every circle in a different
 Jpanel, I do not have clear ideas, someone can give me an help on
 structuring this application?
 Thanks
 
 Antonio
 www.etantonio.it/en
- 14
 - Bug#456447: freeguide: missing dependency, needs file libgtkpeer.soOn Sat, Dec 15, 2007 at 02:51:15PM -0700, Shaun Jackman wrote:
 > package freeguide
 > severity 456447 normal
 > tag 456447 confirmed
 > thanks
 >
 > Freeguide does not yet work with the GNU Java interpreter. I suspect
 > the bugs you plan on filing will simply boil down to "does not work
 > with GNU Java interpreter". In which case, I'd suggest you simply file
 > one bug.
 >
 > Freeguide itself does not depend on libgcj7-awt, however the GNU Java
 > interpreter does if you want to use the Swing GUI library. Since
 > Freeguide can be used with any compatible Java interpreter, your
 > problem is not specific to Freeguide. For what it's worth, the package
 > libgcj7-1 does recommend the package libgcj7-awt.
 >
 > The problem you've recognized is real, but the solution isn't straight
 > forward. Perhaps there's a need for a virtual java-swing package that
 > is provided by libgcj7-awt and any other Java VM package that provides
 > Swing. I've cc'ed this email to the Debian Java team for their input.
 
 This is a problem of the GCJ installation on the system. in Etch
 libgcj7-awt is recommended by gij which is not very likely to be
 installed by the local admin as we tell users to install
 java-gcj-compat. In Sid/unstable we solve this by letting
 java-gcj-compat recommend libgcj8-1-awt. As we depend on users
 installing recommendations that is no problem. This is *no* problem of
 freeguide. Its discussable if we should add a recommends on libgcj7-awt
 to java-gcj-compat in stable. But thats a decision to be made by the
 stable release managers.
 
 Cheers,
 Michael
 
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- 15
 - how display japanese character with eclipseI do not know how display japanese character with eclipse (java
 programation).
 I am a beginer on java programation and I whould like use java and
 sql
 database to create a program to drill my self with kanji.
 I have all ready seen some program of drilling but I would like to
 try
 a new approach to the problem.
 
 I'm french native speaker so I'm not using a japanese eclipse version
 but I can display and write japanese with other program
 
 Furemore I would like to know how connect a sql database with eclipse.
 
 http://blogs.yahoo.co.jp/furayaku2001
 
 furayaku