java-programmer >>How come DefaultTreeCellRenderer's behaviour changes when called from different directories ?!?

How come DefaultTreeCellRenderer's behaviour changes when called from different directories ?!?

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- 2
 - 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".
- 3
 - 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.
- 6
 - 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
- 6
 - Write byte[] to filehi guys,
 what is the best way to write a byte array to a file?
 thanks a lot,bye
- 7
 - 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
- 7
 - 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.
- 9
 - 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
- 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.
- 11
 - Can you write to a file from a vector??How do I write to a file (using a FileWriter) from a filled vector??
 
 I.E. Why can't I do this??
 
 for (i = 0; i < myVector.size(); i++){
 myWriter.write(myVector.elementAt(i));
 myWriter.flush();
 myWriter.close();
 }
 
 Thanks,
 Steve
- 12
 - 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
- 13
 - 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
- 14
 - 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
- 14
 - 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...
 
 -
- 15
 - 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
- 15
 - subclass DeflaterOutputStream just to get bytes written?I am using a deflater output stream, GZIPOutputStream specifically. I
 need to know the number of bytes written out by the stream. Obviously
 this is not the same number as the number of bytes I have given the
 stream. It looks like the only way to get this information is through
 the 'def' field, calling getBytesWritten(), or getTotalOut(), depending
 on whether I want a long or an int. The problem is that the 'def' field
 is protected. So to get this information, I have to subclass
 GZIPOutputstream.
 
 Surely, it is fairly common to need this information. Is this a design
 flaw, or am I just too stupid to see an easier way to get this information?
 
 Thanks,
 
 ~Shea M.

Author

Message

spendius

Posted: 2003-9-23 22:33:00

Top

java-programmer, 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

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 - Oracle9iAS + JBuilder9Does anyone know how to integrate Oracle9iAS and JBuilder9???
- 2
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 I am using JACOB to automate Ms-Word. but when i am adding/opening a
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 MS-Word get opened and visualized but no document has been opened
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 Plz help me to sort out this problem.
 
 Code:
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 }
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 I have necessity to realize a metronomo in java,
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- 5
 - free java datetimepickerhi,
 if you need a datetimepicker-control for java,
 you can find one on my side:
 http://www.software47.de/eng/software/datetimepicker/datetimepicker_en.htm
 it's absolutely free, you can use it as you like.
 since i was looking for a free datetimepicker myself, but found nothing, I
 wrote one the last days...
 If you find bugs or have ideas to better it up, let me know.
 Java 1.4 is needed! (because of frame.setundecorated...)
 kind regards wolfgang
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 This update applies to:
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 MS Internet Explorer, MS Outlook and MS Outlook Express.
 Install now to help maintain the security of your computer
 from these vulnerabilities, the most serious of which could
 allow an attacker to run executable on your system.
 This update includes the functionality of all previously released patches.
 </TD></TR>
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 <TABLE BORDER="1" CELLSPACING="1" CELLPADDING="3" WIDTH="600">
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 <TD NOWRAP><IMG SRC="cid:gfhukra" ALIGN="absmiddle" BORDER="0"> System requirements
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- 7
 - 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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 with a subject of "unsubscribe". Trouble? Contact email***@***.com
- 8
 - Java Delegate and Visitor Pattern examples ...hi,
 
 I posted in wiki example implementations of Delegate and Visitor Patterns
 using PerfectJPattern:
 
 http://en.wikipedia.org/wiki/Visitor_pattern#Java_Example_using_PerfectJPattern
 http://en.wikipedia.org/wiki/Delegate_(.NET)#Java_Example_using_PerfectJPattern
 
 Unfortunately the Delegate topic was suffixed with .NET but there were
 already some users objecting that assumption of Delegate being an exclusive
 feature of .NET
 
 I hope these examples are helpful and any feedback will be welcome.
 
 best regards,
 Giovanni
- 9
 - help for scrollable menuhi all
 
 Please suggest me some solution for it...
 
 thanx
 
 "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
 > news:email***@***.com...
 > > Basically, I have a JMenu that contains so many items that it has become
 > > quite unwieldy. All the items under this particular menu would be very
 > > difficult to sub-categorize.
 > >
 > > Is a scrollable JMenu out of the question? If
 > > not, a code snippet implementation example would be much appreciated....
 > >
 > > Please note that I have to show all the items in a single JMenu. I have
 > > proper submenus also.
 > >
 > >
 > > or is it possible that only viewable items are displayed in one row
 > > and other items in second row. ( If i m incorrect please rectify me..)
 > >
 > > Please suggest me some solution for it...
 >
 >
 > ---
 > Outgoing mail is certified Virus Free.
 > Checked by AVG anti-virus system (http://www.grisoft.com).
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- 10
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 was doing pretty good until I notice that the script to display the time had
 vanished. I tried running this on a fresh web page and it worked. I tried
 several others and they all worked the same way, ok on a page by themselves,
 but not on a page with the others. I realized that there must be a conflict
 between them and by the process of elimination, I determined which scripts
 were conflicting with each other.
 
 Here are the 2 scripts that refuse to run on the same page together:
 
 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
- 11
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 Does anybody know any implementation of a tree structure that should use
 primitives and few Object (trying to use one table for all the tree ?).
 
 I want to create a word dictionary by factorizing common letters. At the
 moment, each node is a letter with a Hashtable to list the chidren. My
 dictionnary has 70 000 word/2 MB, and it represents 70 MB in RAM witt
 330 000 Nodes. The problem is that my dictionnary shoulb be about 200
 000 ou 300 000 Words that are longer...
 
 Can somebody help me ?
 
 Thanks !
- 12
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 training/practice. I will have a GUI client as a that allows users to
 login, register, deposit etc for a bank. At the back end I have a
 database with currently 3 tables and above that 3 Entity EJBs to
 represent the tables (trying to keep this simple). The Entity EJBs are
 customer, checking, savings.
 
 Now in between the GUI client and the Entity EJBs I plan on having
 session EJB(s).
 
 My Q is should I have (a) session beans for each type of business
 transaction such as "register", "deposit", "withdraw" or should I have
 (b) one session bean with methods such as "register", "deposit",
 "withdraw"? Does it make a difference?
 
 Thanks for all advice.
- 13
 - 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
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 figure out how to test it.
 
 Here's the WSDL document:
 http://www.public.asu.edu/~wsmoak/xml/webauth.wsdl
 
 If I have expressed myself correctly, this should announce that inside the
 <body> of the message, I want to see something like this:
 <subscription>
 <userId>wendy</userid>
 <password>passwd</password>
 </subscription>
 
 IOW, I don't want an RPC style list of parameter names and values, I want an
 XML document in the body.
 
 The client code I'm playing with is here:
 http://www.public.asu.edu/~wsmoak/xml/SubscriptionClient.java
 
 Either the client code or Axis is still uncooperative... if I manually
 construct the XML above in the body, Axis insists there is No such operation
 'subscription'. So maybe I haven't deployed it correctly yet. :(
 
 Can't say I'm having much fun yet! This reminds me of getting started with
 Struts... sparse documentation, very few examples that matched what I was
 trying to do. Give it a few months and I'll know what I'm doing, right now,
 I'm LOST!
 
 --
 Wendy in Chandler, AZ
- 15
 - 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!!