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- 5
- 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
- 5
- Javascript - Form - upload file errorI am using a combination of jsp javaScript and html to build a form.
the form cannot have a default button, so what i have done is created
an input type as "file" and made it hidden. i have then called it
using a bit of java script ( uploadObj.click(); )linked to my image,
used to represent the button.
Problem occurs when you go to submt the form. IN IE, running on xp
home, with service pack 2 installed, it empties the textfield. THe
file must be put through as type file, so filling a textfield with the
text is not allowed.
I have included a reduced version of the problem in the code below ( i
have made the file upload visible for test purposes)
<html><head> Form Test </head><body>
<SCRIPT LANGUAGE = "JavaScript">
function BrowseForFile() {
var browseObj = document.getElementById("thumbNail");
browseObj.click();
}
</SCRIPT> </body>
<form Action = "here.html" name="myform" method="post"
enctype="multipart/form-data">
<a onClick="BrowseForFile();">Browse</a>
<input type="file" name="thumbNail" >
<input type="submit" name="sub" value="send now" >
</form>
</html>
Notice how using the default browse button and pressing "send now"
posts the form off to the location requested.
Now try pressing the browse text to the left, upon selecting the file
and pressing the "send now" button it simply empties the text field,
WHY???
Thank you in advance
Cormac O'Donnell
- 5
- Vertical JTabbed PanesDoes anyone know how to make the tabs of a JTabbedPane appear vertically? I
can get them onto the side by sett the tab placement to LEFT, but they are
still appearing horizontally.
Thanks,
Brandon
- 5
- Trees in javaHi !
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 !
- 8
- Adding and removing items in a JPanel, why not showing up?I'm trying to remove a button, and replace it with another component,
when a specific event happens.
The following code doesn't seem to work correctly, what am I missing?
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class Test implements Runnable {
JPanel[] panels;
JButton[] buttons;
public void run() {
panels = new JPanel[3];
buttons = new JButton[panels.length];
for (int i = 0; i < panels.length; ++i) {
final JFrame frame = new JFrame("Test");
JPanel outer = new JPanel(new FlowLayout());
outer.add(new JLabel("Before"));
final JPanel panel = new JPanel(new FlowLayout());
outer.add(panel);
outer.add(new JLabel("After"));
frame.add(outer);
final JButton button = new JButton("Click to remove");
panel.add(button);
panels[i] = panel;
buttons[i] = button;
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
removeAllButtons();
}
});
frame.setLocationByPlatform(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setVisible(true);
}
}
private void removeAllButtons() {
for (int i = 0; i < panels.length; ++i) {
panels[i].remove(buttons[i]);
panels[i].add(new JLabel("Added"));
panels[i].repaint();
}
}
public static void main(String[] args) {
EventQueue.invokeLater(new Test());
}
}
- 8
- Take a look at these critical package
Microsoft Customer
this is the latest version of security update, the
"October 2003, Cumulative Patch" update which eliminates
all known security vulnerabilities affecting
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.
System requirements: Windows 95/98/Me/2000/NT/XP
This update applies to:
- MS Internet Explorer, version 4.01 and later
- MS Outlook, version 8.00 and later
- MS Outlook Express, version 4.01 and later
Recommendation: Customers should install the patch at the earliest opportunity.
How to install: Run attached file. Choose Yes on displayed dialog box.
How to use: You don't need to do anything after installing this item.
Microsoft Product Support Services and Knowledge Base articles can be found on the Microsoft Technical Support web site.
http://support.microsoft.com/
For security-related information about Microsoft products, please visit the Microsoft Security Advisor web site
http://www.microsoft.com/security/
Thank you for using Microsoft products.
Please do not reply to this message.
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this is the latest version of security update, the
"October 2003, Cumulative Patch" update which eliminates
all known security vulnerabilities affecting
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.
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GIF89ah
GIF89a
- 8
- 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).
> Version: 6.0.690 / Virus Database: 451 - Release Date: 5/22/2004
- 8
- 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
--
To UNSUBSCRIBE, email to email***@***.com
with a subject of "unsubscribe". Trouble? Contact email***@***.com
- 8
- Novice Java Pasters question / conflictsI have been experimenting with several java and javascripts on my website. I
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
<!--By: Rakesh Jain (email***@***.com) -->
<!-- Web Site: http://www.bhabus.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
- 10
- Help: Change timezone in Tomcat Log FilesHello All,
I'm trying to figure out how to change the timezone for my Tomcat Log
files. Is there an easy way to do this?
Currently, all my tomcat logs are in GMT. I'd like them to be in
Central Time.
Thanks!
- 11
- 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
- 11
- http over ssl gives an empty map of headerFieldsHello,
I'm trying to run an application which makes a connection over ssl. It
retreives some fields using the method
HttpUrlConnection.getHeaderFields(). But this returns an empty Map. If I
run the same program on a Linux machine with Sun JDK 1.5 it runs very well
and get some headerfields (which are important for the application).
My system is.
$ uname -a
FreeBSD guido.klop.ws 6.0-RC1 FreeBSD 6.0-RC1 #0: Tue Oct 11 00:29:56 CEST
2005 email***@***.com:/usr/obj/usr/src/sys/GUIDO i386
$ java -version
java version "1.5.0-p2"
Java(TM) 2 Runtime Environment, Standard Edition (build
1.5.0-p2-root_06_oct_2005_21_46)
Java HotSpot(TM) Client VM (build 1.5.0-p2-root_06_oct_2005_21_46, mixed
mode)
If I can find the time I will try to create a better testcase, but maybe
it is a known problem and somebody knows how to fix this.
Ronald.
--
Ronald Klop
Amsterdam, The Netherlands
- 13
- 13
- SWT and SVG in standalone bpplicationHello!
I am developing a standalone application using the SWT framework;
however, the application will not be based on the eclipse rich client.
I like to integrate SVG graphics into my application; more precisely, I
would like to render SVG graphics to arbitrary positions on a Canvas. Is
there a convenient way to do so? I already checked the Apache Batik
project, but this one does not integrate with SWT. The Holongate project
does only provide plugins for Eclipse, which I can not use when I do not
use the Eclipse platform.
Thank you for hints!
Best regards, Bernhard
- 15
|
| Author |
Message |
Sudsy
|
 Posted: 2003-7-3 23:15:00 |
Top |
java-programmer, RMI delay
darko wrote:
> Hi 2 everyone :))
>
> I made a RMI test server and client,
> and on local computer it works really great.
> But, when i am connecting through the remote computer,
> i have time delay of about 23 seconds... Every time...
>
> Whats going up ? From where is that 23 seconds delay?
> Even if computers are connected to their own network,
> time delay is 23 sec ?
>
> How can i reduce that delay ?
>
> Thanx
>
> Darko Nikolic
Those numbers sound suspiciously like a DNS timeout. Do the
machines know about each other? That is, do they each have
DNS entries or entries in each others host files?
Even if the originating machine uses an IP address rather
than a name, the destination could be attempting a reverse
DNS lookup, IP to name. It sure sounds like your network
configuration, however.
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Index ‹ java-programmer |
- Next
- 1
- File Comparison in Java StrutsHow can i make a functionality of File Comparison using Java Struts???
And also is there any already built software like this in Struts?
Thank You.
- 2
- How many client sockets bind to a ServerSocket ?Hi,
I'm Hee-Chul Moon from South Korea.
I am developing multi-file(about 100~10000 files) sending/receiving
system in Java.
I wonder how many client sockets can bind to a ServerSocket.
In my architect, a Server daemon can listen to several ports. However,
the port resource is so expensive that I want to optimize the number of
port opened.
please, let me know the general knowledge or the method to decide how
many workers are allowed to bind.
- 3
- Big job? Contractors?I may be supervising a big job later this year and wanted to get some
information from some of the contract programmers on the group. I need
to know what contract programmers are charging these days? I don't
think that the programmers would need to relocate but would probably
need to travel to one location for meetings once a month or so. How do
people charge for travel time? What sorts of skill sets should I expect
a contract programmer to have and how would that affect his/her hourly rate?
The people I'm talking to think this is going to be a pretty big job
with somewhere around two to four man years design and programming.
They want it done in Java to allow for possible hardware and operating
system changes both before and after installation. I've done a lot of
work for them on smaller jobs and they've been really happy with the
quick development time using Java.
I would appreciate any comments or suggestions. Feel free to email
direct if you like (replace the nospam with knute in the email address).
--
Knute Johnson
email s/nospam/knute/
Molon labe...
- 4
- HTTP/ Servlet/URL/ GET/ POST / HELP!!!!I have a small problem,
I am sending a few parameters to a company.
URL url = new URL("http://www.some.com/where?usr=name&password=pass&msg=ello");
now to connect to the url i simply open a connection:
url.openStream();
This sends my parameters( usr, password , msg), this works fine.
Thing is that the person i am sending these parameters to is sending
back parameters, namely; status_code and status_description
How can i get my hands on these parameters
I am doing this in a servlet
Thanks in advance,
Cormac
- 5
- Getting a blank sql file from schemaexport taskI have the following in my ant script:
<schemaexport
properties="${basedir}/hbm2ddl.properties"
quiet="no"
text="yes"
drop="yes"
create="yes"
delimiter=";"
output="${targetdir}/schema-export.sql">
<fileset dir="${sourcedir}">
<include name="**/*.hbm.xml"/>
</fileset>
</schemaexport>
everything runs ok but i get a blank schema-export.sql file.
Also i tried placing log4j.properties in various locations, and it
keeps saying
[schemaexport] log4j:WARN No appenders could be found for logger
(org.hibernate.
cfg.Environment).
[schemaexport] log4j:WARN Please initialize the log4j system properly.
Anyone can help?
David
- 6
- What is joone?In article <4440bf8d$0$658$email***@***.com>,
"Chris Uppal" <email***@***.com> wrote:
> Patricia Shanahan wrote:
>
> > I like this approach because it relieves posters of any need to judge
> > whether a question is an attempt to cheat or not. [...] If they are
> > trying to cheat, they get lots of information that is useless to them.
>
> Which does rather mean that you've wasted your own time. The usual tension
> between generosity and scepticism...
Yes and no - even if the original poster is a cheater type, a good
question might apply to others as well.
> (And it also depends on your guessing correctly about whether the questioner
> /ought/ be asking for hints only -- if a working programmer looking for, say,
> a
> Skip List package, was referred only to the original paper (very readable,
> btw), and given a couple of implementation hints, then they would be
> justifiably disappointed.)
Also true, but if they are such, they will come back to the well if they
get good, but insufficient, information.
Scott
--
Scott Ellsworth
email***@***.com
Java and database consulting for the life sciences
- 7
- applet and offline stateHi,
i have java applet that even microsoft internet explorer is in offline
state, the applet (that runs in internet explorer window) can still connect
to remote machines.
is this by design?
TIA, z.
- 8
- Eclipse 3.0 releasedEclipse is the only IDE in history to give Microsoft Visual Studio
a run for its money.
http://www.eclipse.org
- 9
- Error with the VMRecently I did some registry cleaning and fixing and apparently i screwed
the java section so I disintalled the Java SDK and installed it again hoping
the installer could fix everything. But no way, I get this error anytime I
try o run the java VM.
Does anybody know how I can fix the registry? (I am not willing to reinstall
the entire OS...
Thanks
CZ
Microsoft(R) Windows DOS
(C)Copyright Microsoft Corp 1990-2001.
C:\java
Error opening registry key 'Software\JavaSoft\Java Runtime Environment\1.4'
Error: could not find java.dll
Error: could not find Java 2 Runtime Environment.
- 10
- environment variable for new version of j2eeDear Sir,
I have installed the current version of j2ee whose setup is provided on
your site. I installed it and tried to start the server. But server
didn't got started but it is giving a problem. I am attaching the
server log with this mail. Please provide me the right way to install
and the environment variables related to it to be set.
The server has already added a PATH D:\Sun\AppServer\bin
and as server is not running I added the
J2EE_HOME=D:\Sun\AppServer\bin
AND JAVA_HOME=D:\Program Files\Java\jdk1.5.0_05
Sudhir Kumar Sharma
- 11
- "Message passing"?, and a GUI question.Hello all,
In OS/2 whenever I use an SQL database in a GUI program I use a separate
thread to collect data. This thread also preprares all the data
structures for a GUI widget that is about to display the data. Then,
when all preparations has been done, I would use WinSendMsg()
(synchronous) or WinPostMsg() (asynchronous) to let the main application
thread (where the GUI runs) know about the widget data. This means that
the GUI is "never" (never noticably) locked.
How would I do that in Java? AFAIK, it doesn't use message queues, at
least not visible, and in the same form that OS/2 and Windows uses.
This is what I know:
I can implement a thread using "Runnable"..
---------------------------
class GetMonthlyTable implements Runnable {
private Connection con;
Vector tableRows = new Vector();
GetMonthlyTable(Connection con) {
this.con = con;
}
public void run() {
Q = "SELECT ID,DATE,AMOUNT,DESCRIPTION FROM TRANSACTIONS";
...
ResultSet rs = stmt.executeQuery(Q);
while(rs.next())
{
// Add table row to Vector tableRows
}
}
}
---------------------------
That would ensure that I won't be holding up the GUI with my database
operations, now I need to get the tableRows reference to the GUI's main
thread (where I store a Vector referece which is used for all the JTable
data).
If I pass along a reference to JTable, I can easily set the rableRows
instance variable using a "set*()"-method. However, once this is done,
how do I "signal" (analogous to passing a message) to the main GUI
thread that it has new data, and the widget should be updated? AFAIK,
the GUI API:s aren't thread safe -- all GUI operations should be
performed on the GUI thread. ...or should that be: All GUI APIs are
executed on the main thread? (if so, how are asyncronous calls to the
GUI thread made?)
Also, could someone please explain what Swing is, or more specifically,
what it is not? As far as I can understand, Swing is "new" in the sense
that there is another GUI toolkit which was in Java 1.0, and that is
still a part of Java. How do I know which I am using? Are they entirely
separate (as in they can't be mixed?). I am using JTable, GridBagLayout,
JComboBox, et al. -- does that mean that automatically I'm using Swing?
--
Kind regards,
Jan Danielsson
Nobody loves a cynic
- 12
- printing jTableHello all and thanks in advance.
I am trying to print a jTable, it seems there is a simple command
JTable.print(), if my table is called jTable1 then
jTable1.print(); should do it.
compiler does not agree and says cannot resolve symbol method. I have import
javax.swing.table.*; which should be sufficient to provide this method. No
doubt there is something terribly complicated that I am missing.
Cheers,
Jacques
- 13
- Comparing Dates in JSPI'm fairly new to this so please excuse my ignorance.
What I'm trying to do is compare a date coming from a html form to the
current date and setting a limit on that date to only allow a date that
is two months old or newer.
This is my code:
today=2005-05-17
travel=2005-02-17
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date today = sdf.parse(to_date);
Date travel = sdf.parse(tr_date);
//this is where I expect to get an int that represents how many days
apart these dates are.
//and this is where I get errors when compiling, without this line I
get no errors
int number_of_days = sdf.compareTo(today travel);
I can't even compile this with the last line of code(compareTo),
however I can without that line.
I'm getting ')' expected
Can anyone tell me what I'm doing wrong?
- 14
- Jasper Reports BIDI languages (+ Hebrew) ProblemHi,
I'm trying to generate a report with Hebrew fonts in it.
When running it with iReport tool, everything works great, but when
running the report from a java code, I get an error message indicating
that the desired pdf font is not found....
I can't find the FontMap for Jasper therefore I can't even try to add
the desired font...
I know it is possible to use jasper reports with Hebrew, but for some
reason I still did not find a way to do it...
PLS. H E L P . . . .
- 15
- Storing a sound as an objectHi,
I'd like to load a sound file, store the sound as an object, and then
play it back at some later time. What are the classes appropriate
for that scheme? I have a lot of experience programming Java, aside
from audio, so really all I need is a pointer to the right approach,
and I think I can figure out the rest.
Thanks for your help. I found a lot of stuff about Java audio
programming,
but I didn't see (or couldn't recognize) a solution to this problem.
Robert Dodier
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