| create a bean on webapp startup |
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Index ‹ java-programmer
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- 5
- I can not get data from Table cellHi every one
I try to get String from cell in jTable
every time I try to get data from cell I only get null
and this is my code
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
Class.forName("com.mysql.jdbc.Driver");
Connection con;
con = DriverManager.getConnection("jdbc:mysql://localhost/
uni","root","java");
Statement stat = con.createStatement();
ResultSet result;
result = stat.executeQuery("select max(no) from student_info_table");
result.next();
int mx, c;
mx = result.getInt(1);
mx = mx +1;
String inserting_Data = "insert into fee_part_table (feeNO, feeParts,
fee_1st_part) values(?, ?, ?)";
PreparedStatement ps = null;
ps = con.prepareStatement(inserting_Data);
ps.setInt(1, mx);
ps.setInt(2, c);
String st;
st = String.valueOf(jTable2.getValueAt(0, 0));
JOptionPane.showMessageDialog(this, st);
ps.setString(3, String.valueOf(jTable2.getValueAt(0, 0)));
ps.executeUpdate();
///////////////////////////////////////////////
- 5
- 360degree rotation in Java2DI have a bit of a problem rotating Shapes using the Graphics2D function
rotate(theta).
My high-school trig lessons indeed tell me that sine and cosine functions go
between -90 degrees and +90 degrees (or 0 and 180, if you like), and I can
see why this means that when I call the rotate(...) function, it will not
rotate the object all the way round the whole 360 degrees.
Currently, I have a duplicate Shape object which is flipped so that for one
half of the rotation the original shape is drawn, and for the second half,
the other...
There must be a better way!
Any ideas?
Cheers :o)
Will
- 5
- actionPerformed programmaticallyHi
Is it good way to programmatically call actionPerformed?
NewAction action = new NewAction();
action.actionPerformed(null); //maybe instead null should be something
else, but what?
Best Regards
Greg
- 5
- jdk1.6 - has no applet pluginHello
I cannot find the plugin that, I thought, should
come with jdk1.6.
Have I lost my mind or have they hidden it somewhere?
Thanks for your time.
dkr
- 5
- Announcement: Super 5.10 - a suite of J2EE toolsAnnouncement: Super 5.10 - a suite of J2EE tools.
Super 5.10 comes with:
SuperEnvironment
SuperLogging
SuperPeekPoke
SuperReport
SuperScheduler
SuperStress
SuperWatchdog
and SuperPatrol, as a schedule job.
The evaluation edition can be anonymously downloaded from:
http://www.ACElet.com.
Super is a component based monitor and administration tool
for EJB/J2ee. It provides built-in functionality as well as
extensions, as SuperComponents. Users can install
SuperComponents onto it, or uninstall them from it.
Super has the following functions:
* A J2EE monitor.
* A gateway to J2EE/EJB servers from different vendors.
* A framework holding user defined SuperComponents.
* A full-featured J2EE logging and J2EE tracing tool for centralized,
chronological logging.
* An EJB tool for Peeking and Poking attributes from EJBs.
* An EJB Stress test tool.
* A J2EE global environment tool.
* A J2EE report tool.
* A J2EE Scheduler tool.
* A J2EE Business patrol tool.
It is written entirely in the Java(TM) programming language.
The current version support:
* JOnAS 2.4 and 2.6
* SunONE 7.0
* Universal servers.
* Weblogic 6.1, 7.0 and 8.1
* Websphere 4.0, 5.0.2 and 5.1
* jBoss 3.0 and 3.2
********** What is new:
Version 5.10 January, 2004
Enhancement:
1. SuperScheduler 4.1: Multiple holiday set is an advanced feature
now.
This arrangement is convenient for most of users.
2. Support WebSphere 5.1.
Change:
1. SuperScheduler 4.1: Repeating "At specified times" changes from
"all
things considered" algorithm to POSIX cron compatible
implementation.
Bug fix:
1. SuperScheduler 4.1: Repeating Daily did not consider "Day time
saving",
so there were one hour shift in April and October.
Version 5.00 January, 2004
Enhancement:
1. SuperScheduler 4.00: Rewritten SuperScheduler with bug fixes and
enhancements,
including: 1. Add task duration. 2. Add Email, JMS Queue and Topic
jobs.
3. Add Retry tasks. 4. Add GUI version of Unix cron repeating.
5. Rewritten holiday facilities.
2. SuperWatchdog 1.00 with File, JMS Queue, JMS Topic and User
triggers and
the same group of actions as SuperScheduler.
3. SuperLogigng 4.01: Improved Alarm/Alert GUI.
Version 4.00 November, 2003
Enhancement:
1. Support for both native protocol (RMI-IIOP) mode and HTTP/HTTPS
(with/without proxy) protocol mode for SuperEnvironment,
SuperLogging, SuperReport and SuperScheduler.
2. SuperLogging 4.00: tracing can work on both live database and
retired database.
3. SuperReport 3.00: works for both live database and retired
database.
4. SuperScheduler 3.00: add URL job type (for Servlet/JSP). Add
DoerTalker Table Panel.
Bug fix:
1. SuperScheduler 3.00: Interval change did not take effect until
restart Super.
Version 3.00 July, 2003
Enhancement:
1. SuperLoggingLibrary 3.00: New implementation for change scope
adding "Smart" scope,
with enhancements and bug fixes.
2. SuperLoggingLibrary 3.00: Support mail server which requires user
name and password.
Add MenuTreePanel.
3. Improved GUI and document.
4. Add support to WebLogic 8.1.
Bug fix:
1. SuperScheduler 2.0: Fix a bug in FutureView for Hourly and
Minutely.
2. SuperScheduler 2.0: Startup should never be reported as missed.
3. SuperScheduler 2.0: Could not reset job for existing task in some
situation.
Version 2.20 Jan. 2003
Enhancement:
1. Add desktop and start menu shortcuts for MS-Windows.
2. Add support for SunONE 7, JOnAS 2.6 and jBoss 3.0.
3. SuperLogging 2.40: Add new sendAlarmEmail() method.
4. SuperScheduler 1.40: Add SuperSchedulerEJB for managing when
direct database is not practical; Allow user to choose
favorite logging software; Add Last day as Monthly
repeating attribute.
Change:
1. Change Unusual to PatrolAlarm. The name "Unusual" was misleading.
Bug fix:
1. SuperEnvironment 1.31: Bug fix: if database is broken, could not
open Environment Manager.
2. SuperLogging client 1.52: Annoying exception thrown when you use
JDK 1.4 (the program runs okay).
3. SuperPeekPoke 1.61: Fix bug where input object contains
java.lang.Double and alike.
4. SuperScheduler 1.40: Bug fixes in: Memory leak; Reporting
PatrolAlarm for SuperPatrol; Composite task with members;
Non-scheduled run on other host; Around edges of last
days in Monthly with holiday policy.
Version 2.10 July 2002
Enhancement:
1. SuperScheduler 1.3: Add Future View to check future schedule in
both text and Gantt-chart mode.
2. SuperScheduler 1.3: Add graphic Gantt view for monitoring task's
activities.
3. SuperEnvironment 1.3: uses new graphic package adding print and
preference facilities.
4. SuperPeekPoke 1.6: uses new graphic package adding print and
preference facilities.
5. SuperStress 1.21: uses new graphic package.
Bug fix:
1. SuperStress 1.21: fixed graphic related bugs.
Version 2.01 June 2002
Enhancement:
1. Add options for Look & Feel.
2. Preference is persistent now.
Bug fix:
1. Installation for WebLogic 7.0: extEnv may not be installed on the
right place, so SuperLibrar on the server side was not loaded and
causes other problems.
Version 2.00 June 2002
Enhancement:
1. SuperScheduler 1.2: All copies of SuperScheduler refresh themselves
when any Doer causes things to change.
2. SuperScheduler 1.2: Support default HTML browser for reading HTML
document.
3. SuperReport 1.2: Support default HTML browser for reading HTML
document.
4. Support WebLogic 7.0.
5. SuperEnvironment 1.21: Database Panel appears when it is necessary.
6. SuperEnvironment 1.21: New SuperEnvironment tour.
Bug fix:
1. WebSphere Envoy did not always list all JNDI names.
Version 1.90 May 2002
Enhancement:
1. Rewritten SuperLogging engine. Add Alarm Email on SuperLogging.
2.Rewritten SuperScheduler allowing multiple Doers. Add support to
holiday policy, effective period. Add Patrol job type as SuperPatrol.
3. Add support for both JOnAS and jBoss.
4. Add more elements on Report criteria.
Change:
1. Now, both left and right mouse clicks are the same on Table Panel:
toggle ascend and descend.
2. New log database.
Bug fix:
1. Alert email should be sent once in the interval, regarding number
of servers in the clustering.
2. Minor bug fixes to make errors handled better on SuperLogging.
3. If withFileInfo or withTimestamp are changed alone, Style Panel did
not save them.
4. Rewritten SuperLogging and SuperScheduler with many bug fixes.
Version 1.80 March 2002
Enhancement:
1. Add new component: SuperScheduler
Bug fix:
1. SuperLogging: Verbose should ignore class registration.
2. SuperLogging-tracing: an exception was thrown if the java class
without package name.
Version 1.70 January 2002
Enhancement:
1. SuperLogging: Scope can dynamically change both for upgrade to
downgrade (for weblogic 6.1, need download an application).
2. Add alias names for log threshold as new Java suggests.
3. New component: SuperReport.
Change:
1. SuperLogging: Log database parameters are specified in a properties
file, instead of EJB's deployment descriptor. It is more convenient
and it avoids some potential problems. No change for development,
easier for administration.
Bug fix:
1. Add Source Path Panel now accepts both directory and jar file.
2. Bug in SuperEnvironment example (for version 1.60 only).
Version 1.60 December 2001
Enhancement:
1. SuperPeekPoke and SuperStress can use user defined dynamic argument
list.
2. Add timeout parameter to logging access.
3. New installation program with A). Easy install. B). Remote command
line install.
4. Support EJB 2.0 for Weblogic 6.1.
5. Support SuperPeekPoke, SuperEnvironment and SuperStress for
Websphere 4.0 (SuperLogging was supported since version 1.5).
Change:
1. Poke: argument list is set at define time, not invoke time.
2. Default log database change to server mode from web server mode,
booting performance to 10-20 times.
Bug fix:
1. If the returned object is null, Peek did not handle it correctly.
2. If the value was too big, TimeSeries chart did not handle it
correctly. Now it can handle up to 1.0E300.
3. Help message was difficult to access in installation program.
4. Source code panel now both highlights and marks the line in
question (before it was only highlight using JDK 1.2, not JDK 1.3).
5. Delete an item on PeekPoke and add a new one generated an error.
Version 1.50 August, 2001
Enhancement:
1. Source code level tracing supports EJB, JSP, java helper and other
programs which are written in native languages (as long as you
write correct log messages in your application).
2. Redress supports JSP now.
3. New installation with full help document: hope it will be easier.
4. Support WebSphere 4.0
Version 1.40 June, 2001
Enhancement:
1. Add SuperEnvironment which is a Kaleidoscope with TableView,
TimeSeriesView and PieView for GlobalProperties.
GlobalProperties is an open source program from Acelet.
2. SuperPeekPoke adds Kaleidoscope with TableView, TimeSeriesView and
PieView.
Changes:
1. The structure of log database changed. You need delete old
installation and install everything new.
2. The format of time stamp of SuperLogging changed. It is not locale
dependent: better for report utilities.
3. Time stamp of SuperLogging added machine name: better for
clustering environment.
Bug fix:
1. Under JDK 1.3, when you close Trace Panel, the timer may not be
stopped and Style Panel may not show up.
Version 1.30 May, 2001
Enhancement:
1. Add ConnectionPlugin support.
2. Add support for Borland AppServer.
Version 1.20 April, 2001
Enhancement:
1. Redress with option to save a backup file
2. More data validation on Dump Panel.
3. Add uninstall for Super itself.
4. Add Log Database Panel for changing the log database parameters.
5. Register Class: you can type in name or browse on file system.
6. New tour with new examples.
Bug fix:
1. Redress: save file may fail.
2. Install Bean: some may fail due to missing manifest file. Now, it
is treated as foreign beans.
3. Installation: Both installServerSideLibrary and installLogDatabase
can be worked on the original file, do not need copy to a temporary
directory anymore.
4. PeekPoke: if there is no stub available, JNDI list would be empty
for Weblogic5-6. Now it pick up all availble ones and give warning
messages.
5. Stress: Launch>Save>Cancel generated a null pointer exception.
Changes:
1. installLogDatabase has been changed from .zip file to .jar file.
2. SuperLogging: If the log database is broken, the log methods will
not try to access the log database. It is consistent with the document
now.
3. SuperLogging will not read system properties now. You can put log
database parameters in SuperLoggingEJB's deployment descriptor.
Version 1.10 Feb., 2001
Enhancement:
1. Re-written PeekPoke with Save/Restore functions.
2. New SuperComponent: SuperStress for stress test.
3. Set a mark at the highlighted line on<font size=+0> the Source Code
Panel (as a work-a-round for JDK 1.3).</font>
4. Add support for WebLogic 6.0
Bug fix:
1. Uninstall bean does physically delete the jar file now.
2. WebLogic51 Envoy may not always list all JNDI names. This is fixed.
Version 1.00 Oct., 2000
Enhancement:
1. Support Universal server (virtual all EJB servers).
2. Add Lost and Found for JNDI names, in case you need it.
3. JNDI ComboBox is editable now, so you can PeekPoke not listed JNDI
name (mainly for Envoys which do not support JNDI list).
Version 0.90: Sept, 2000
Enhancement:
1. PeekPoke supports arbitrary objects (except for Vector, Hashtable
and alike) as input values.
2. Reworked help documents.
Bug fix:
1. Clicking Cancel button on Pace Panel set 0 to pace. It causes
further time-out.
2. MDI related bugs under JDK 1.3.
Version 0.80: Aug, 2000
Enhancement:
1. With full-featured SuperLogging.
Version 0.72: July, 2000
Bug fix:
1. Ignore unknown objects, so Weblogic5.1 can show JNDI list.
Version 0.71: July, 2000
Enhancement:
1. Re-worked peek algorithm, doing better for concurent use.
2. Add cacellable Wait dialog, showing Super is busy.
3. Add Stop button on Peek Panel.
4. Add undeploy example button.
Bug fix:
1. Deletion on Peek Panel may cause error under JDK 1.3. Now it works
for both 1.2 and 1.3
Version 0.70: July, 2000
Enhancement:
1. PeekPoke EJBs without programming.
Bug fix:
1. Did not show many windows under JDK 1.3. Now it works for both 1.2
and 1.3
Changes:
1. All changes are backward compatible, but you may need to recompile
monitor windows defined by you.
Version 0.61: June, 2000
Bug fix:
1. First time if you choose BUFFER as logging device, message will not
show.
2. Fixed LoggingPanel related bugs.
Version 0.60: May, 2000
Enhancement:
1. Add DATABASE as a logging device for persistent logging message.
2. Made alertInterval configurable.
3. Made pace for tracing configurable.
Bug fix:
1. Fixed many bugs.
Version 0.51, 0.52 and 0.53: April, 2000
Enhancement:
1. Add support to Weblogic 5.1 (support for Logging/Tracing and
user defined GUI window, not support for regular monitoring).
Bug fix:
1. Context sensitive help is available for most of windows: press
F1.
2. Fix installation related problems.
Version 0.50: April, 2000
Enhancement:
1. Use JavaHelp for help system.
2. Add shutdown functionality for J2EE.
3. Add support to Weblogic 4.5 (support for Logging/Tracing and
user defined GUI window, not support for regular monitoring).
Bug fix:
1. Better exception handling for null Application.
Version 0.40: March, 2000
Enhancement:
1.New installation program, solves installation related problems.
2. Installation deploys AceletSuperApp application.
3. Add deploy/undeploy facilities.
4. Add EJB and application lists.
Change:
1.SimpleMonitorInterface: now more simple.
Version 0.30: January, 2000
Enhancement:
1. Add realm support to J2EE
2. Come with installation program: you just install what you want
the first time you run Super.
Version 0.20: January, 2000
Enhancement:
Add support to J2EE Sun-RI.
Change:
1. Replace logging device "file" with "buffer" to be
compliant to EJB 1.1. Your code do not need to change.
Version 0.10: December, 1999
Enhancement:
1. provide SimpleMonitorInterface, so GUI experience is
not necessary for developing most monitoring applications.
2. Sortable table for table based windows by mouse
click (left or right).
Version 0.01 November., 1999:
1. Bug fix: An exception thrown when log file is large.
2. Enhancement: Add tour section in Help information.
Version 0.00: October, 1999
Thanks.
- 5
- Future of 3Djava
Why comp.lang.java.3d doesn't exist ? If is not dead, for what purpose is
using: games or some engineering tools ? Does java have a future in a
gaming industry?
- 5
- Site about CoffeeIf you're interested in the world of coffee, please check out
www.thecoffeeresource.com
The site will be updated somewhere this week with new content.
Thanks for your time,
TheCoffeeresource.com
- 6
- reading values from JTableI am looking for a working example of a JTable that is constructed
with initial values in the cells, allows the user to change those values,
and reads the values out.
I've got three books on Swing, none of them show a write/read table.
I have no problem creating tables with nothing in some cells, and
reading the values out that the user entered.
Here is how I construct the tables:
DefaultTableModel model01= new DefaultTableModel(rowData,colNames);
JTable table01= new JTable(model01);
Any help greatly appreciated.
--
Robert Metzger
Hewlett-Packard Company
High Performance Computing Division
- 6
- Together J 5.5Hi,
once there was a "community version" of TogetherJ. I have a 5.5 on CD
from a Together Presentation long ago but I am missing the community
"licence.tg". It was free (long time ago) but no longer available now.
Anybody out there with one of theses files?
Thx,
Christian
- 10
- Get the Verb of request in jspHi Guys,
Would anyone mind telling me how to get the verb of a request in jsp?
I would like to know whether the user is using a POST or GET request.
Thanks,
James
- 10
- evaluating the computers TCP and UDP socket statesI am looking to be able to read the TCP and UDP socket states of the
computer using Java2.
I want to be able to determine when a certain TCP socket is listening
vs. connected, etc.
Does the java2 API cover this sort of ability?
thanks,
Dave Haga
p.s. just to be clear, I want to understand the state of ALL sockets,
not just the ones opened by Java. for instance, "netstat -a" on a
windows platform provides the status of all TCP and UDP sockets.
- 10
- CLASSPATH?WinXP Pro, JRE 1.4.2_03
I've just discovered that according to my Environment Variables section of
the System icon (Control Panel), I don't have a CLASSPATH variable. I used
SET from a command prompt to confirm that this is the case. No such
variable. So how come I can run basic (UI) Java programs OK? Shouldn't
CLASSPATH be pointing to the jar file containing these basic classes I'm
using? The problem is, JMF installation instructions seem to say I should
add the path to the jar file to CLASSPATH, but how can I if I have no such
variable? {:v)
Am I missing something?
--
- 10
- [Static Classes]Hi All,
Can someone explain when and why we use 'static classes' in Java ?
Also why 'method local classes' are used and what is their significance
?
Plz reply
- 12
- code conventions - validationAnyone know of a code validator that follows this:
http://java.sun.com/docs/codeconv/html/CodeConvTOC.doc.html
TIA
--
Mike W
- 13
- Tomcat4: Default Page Encoding UTF8Hi,
I am using Tomcat 4.1.27 running servlets which worked
perfectly under Tomcat 3. The problem is: (unfortunately)
the special characters (like german umlaute) are not
html encoded. Under tomcat 3 this was no problem, but with
the new tomcat the page-encoding is wrong. When I manually
change the page encoding in the browser to utf-8 everything
is OK. I could now go through all servlets and change the
content-type to charset utf-8, but I try to avoid this.
(as there where not written by me).
Is there any possiblilty the change the default page encoding
to utf-8? (like in the server.xml or so)
Thank you for any help!!!
Christian
|
| Author |
Message |
Mounir AITTAHAR
|
 Posted: 2006-8-14 17:45:00 |
Top |
java-programmer, create a bean on webapp startup
Hi,
Unsuccessfully web browsing makes me come here.
I wonder if it's possible to create a bean (used by <jsp:use-bean>) on
startup, also through web.xml. I've seen it is possible to launch a
servlet with <load-on-startup> xml element, but, as I believe I've
understood, it is NOT a persistent object.
So, i'm asking if :
- is this possible to create a persistent object through a servlet
lauched at startup ?
- is there a different way ?
Regards,
--
Mounir
|
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Index ‹ java-programmer |
- Next
- 1
- String comparision efficencyHI!
I have an appliation that will need to parse a text of unkown length.
I get the data as an array of strings (and thus I know then how much
data it is)
I want to do several things on each "row" (that is each element in the
array) I want to
1. look for a specific word (start) and count how many of them there
are in total.
2. Highlight the word alarm and append a short description to the end
of the line
my first thought was to use
for(int i=0;i<data.length++){
if(data[i].endsWith("start"){
// do the work..
}else if(data[i].startsWith("Alarm")){
//do different work
}
}
this seems to be rather inefficent as I get two (and possibly more, my
employer did not seem think these few features were enough..)
Is there a better way to do this.
As the alarm line also contains an alarm code, I do not know what it
looks like. Any suggestions?
regards
/daniel
- 2
- java/berkeley-db self-test hangHello!
The newly updated port of java/berkeley-db hangs during self-tests on one of
my machines:
dual FreeBSD/i386 6.1-stable - no hang
single FreeBSD/amd64 6.1-stable - no hang
dual FreeBSD/amd64 6.2-prerelease - hangs
There is little CPU use and all the process is doing, according to ktrace is
the repeated:
[...]
13089 java CALL clock_gettime(0,0x7ffffeff3d00)
13089 java RET clock_gettime 0
13089 java CALL kse_release(0x654f20)
13089 java RET kse_release 0
13089 java CALL kse_release(0x511f20)
13089 java RET kse_release 0
13089 java CALL clock_gettime(0,0x7ffffeff3d00)
13089 java RET clock_gettime 0
13089 java CALL kse_release(0x654f20)
13089 java RET kse_release 0
13089 java CALL kse_release(0x511f20)
[...]
Rebuilding Java did not help... Would any Java and/or thread expert, please,
try to build the port with self-testing enabled and analyze any hang? Thanks
a lot!
-mi
- 3
- wats the cluefrnds wen we connect with Oracle server from java,we use
getConnection(oracledriver,IPadress of
server,servername,username ,password);
forgive me if they r not in the same order.now my question is wat is
the server name if we use same system for server as well as
client.Ofcourse the IP address is loop back address.
Thanks in Advance.
Srinivas Reddy Thatiparthy.
- 4
- JTable emulate a HTML Table?Hi,
I want to display a table of user inputted information as a table but I am
having problems formatting the layout as I want it. I have a fixed cell
width and want the cell height to adjust to fit the text entered by the
user.
I can set the widths but can only set a fixed height for a cell and am
unable to get text to wrap within it,
for example. Also with the fixed height, the single line cells would float
to the vertical center of the cell, not stay at the top. Can alignments be
set?
[date textfield][item textfield][description textarea][idenifier
textfield][cost textfield]
[submit button]
Date Item Description
Identifier Cost
12/12/03 Big Pan This is a description field that BPI420
$60
15:30 spans multiple lines an needs
to wrap. The cell height
should dynamically alter to
accomodate the text.
1/1/04 Aspirin This is a much shorter
AS123 $20
description
Am I able to do this and if so how?
Is there a better way to do this than with using a JTable? I tried doing it
with a gridbag layout but the consecutive items wouldn't stay aligned.
Please help!
Cheers
Xav
- 5
- JPEG manipulationHi all,
I was just wondering if there is a way of changing a JPEG image in
Java, what i mean is, can i edit a JPEG (manipulate pixels in the
image) ?
Thanks in advance
- 6
- Curb Your Spam RageRoedy Green wrote:
Leave it to good ol' Roeds to feel the spammers' pain.
[snippysnipsnip]
- 7
- Software Development Kit 1.5Im starting with learning Java, and a book i got about it says i need
Software Development Kit 1.4. If i download and install it, i build a
java program and i try running it with command prompt.
But, commandprompt says i need version 1.5... :( Does some1 know where
i can download this or does some1 know another program to build Java
programs with and where can i download it...
- 8
- Load default web browserHello,
I want to load a default web browser from my swing application [using
JApplet].
Using Runtime.getRuntime.exec("RunDLL 32.exe
shell32.dll,shellExec.RunDLL"+url);[for windows]
default browser can be called.But it is working in normal class & with
frames only.
with Applet or in swing-JApplet
it is showing error as :- java.security.AccessControlException:access
denied(java.io.FilePermission<<All FILES>>)execute>.
I want a plateform independent solution which will work in swing-JApplet.
--
Message posted via JavaKB.com
http://www.javakb.com/Uwe/Forums.aspx/java-jvm/200505/1
- 9
- HashMap with primitive int keyDear All,
I have a class like this:
class CustomerOrder {
int globalID;
...
}
I have an array of these.
I'd like to store an index of globalIDs, so I can do:
CustomerOrder o = index.get(123)
I could modify my class to be:
class CustomerOrder {
Integer globalID;
...
}
Perhaps it is my C++ background, but the idea of allocating an object for every
ID when I can just use an int bothers me.
I figure a HashMap is the right tool of choice, e.g.:
HashMap<Integer, CustomerOrder> index = new ...
Has anyone out there already written a modified hashmap class that uses int as
the key?
Thanks for any tips :)
Andrew
- 10
- GUI locking up, but code running fine.I'm using Netbeans 5.0 beta for an IDE, with swing components. The
situation is something like this:
The program is a board game - the user chooses a building from a panel,
and then is supposed to get a message to choose what resource to pay
for it with. Here's a trace of the code:
Game (main object):
....
board[i].activate():
Game.game.setPlayer(worker);
Game.game.playerMessage("Choose a wooden building
from the building panel.");
Game.game.waitForBuild(type) :
built = false;
state = type + Game.BuildWood -
1;
mainPanel.buildings.getBP().setSelectedIndex(type-1);
while(!built)
{ Thread.yield(); }
No problems yet. This works fine, unless a building that needs to call
chooseResource is selected.
So, the user clicks one of these buildings, which activates the
following code, which is where the freeze occurs:
String r = Game.game.chooseResource():
state = Game.chooseResource;
resource = "";
while(resource.length()==0)
Thread.yield();
return resource;
Now chooseResource does work in any other context - resource gets set
by a mouseClicked event handler in a panel out there. But at this
point, the GUI stops responding. The playerMessage never gets printed,
and the click event never gets triggered. I did some investigating,
printing out numbers inside the two inmost loops, and the
chooseResource loop is continually running. I know the code's ugly,
but even so, the cause of this behavior is beyond me. Any suggestions
would be greatly appreciated!
- 11
- 12
- JTextArea SizeHello, I'm writing a java app for a pda and as the screen size is tiny I
want to write a MiniDialog class. I only want a JTextArea and an OK button
on it and I want the JTextArea to fit the size of the modal dialog.
If I pass in a long line of text then the JTextArea appears to get wider and
I have to scroll across the screen to see the text. I want it to wrap onto
the second line etc.
I must be doing something stupid!
Thanks, Kevin.
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class MiniDialog {
JDialog dialog=new JDialog(new JFrame(),"Info",true);
public MiniDialog() { }
public void show(String label) {
Container c=dialog.getContentPane();
JButton ok=new JButton("OK");
dialog.getRootPane().setDefaultButton(ok);
ok.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
dialog.dispose();
}
});
JTextArea txt=new JTextArea(5,20);
txt.setEditable(false);
txt.append(label);
JScrollPane scroll=new JScrollPane(txt);
scroll.setSize(1,1);
dialog.setSize(200,200);
dialog.setLocation(20,40);
c.add(scroll,BorderLayout.CENTER);
c.add(ok,BorderLayout.SOUTH);
dialog.show();
}
}
- 13
- tomcat's classpathsHi all.
I have downloaded Tomcat 4.1.27 and I would like to create some JSPs. I took
an earlier JSP app and put it on Tomcat, and I got a class not found
exception. How do I set the classpaths for Tomcat?
One more question, how do I change the web document root? For example, I
want to change it to c:\testing.
Thanks in advance.
- 14
- help:hibernateit drive me crazy!
where is the error?
when i use hibernate to connect to the mySQL,some error happens,just
like:
net.sf.hibernate.PropertyNotFoundException: no appropriate constructor
in class:
but i have defined a constructor without parameters!
it really block me,help!
- 15
- Where have all the wintrolls gone...
"Phil Earnhardt" <email***@***.com> wrote in message
news:email***@***.com...
> >> >> No, Luke. Why don't *you* tell *us*: What would be the point of
> >having
> >> >> the language in 1441 and then doing *nothing* when Iraq was not
in
> >> >> compliance?
> >> >
> >> >There wouldn't be any point. You just beat the UN in doing
something.
> >>
> >> The question is actually the opposite, Luke: given the French never
> >> ever had any intent of enforcing the consequences spelled out in UN
> >> 1441, why did they ever bother approving it in the first place? Why
> >> not just be straight with the UN: "We will veto any measure to
approve
> >> UN military action against Iraq."
> >
> >Actually the sentence doesn't end here. If we put it into context (at
> >the time) it should read:
> >
> >We will veto any measure to approve UN military action against Iraq
if
> >the potential approval is to be based on US intelligence (read:
lies).
>
> But UN 1441 wasn't based on US intelligence.
We're not talking about 1441. France didn't vote against 1441. We're
talking about the invasion "warrant" US wanted to squeeze out of UNSC.
France felt somewhat reluctant to sign that warrant because the
evidence US intelligence (sic!) produced was not so very convincing. At
the time. Later it turned out it was total bullshit. Dubya's setting up
an investigation right now. In 50 years we might get to know the...
conclusions.
> The question remains: Iraq failed to comply with the terms of UN 1441.
> What should have been the consequences of that?
Again? Well, let's hope this time you get it: the terms should have been
enforced. But not under US flag. Maybe (more than likely) under US boot.
But the flag should have been the blue UN.
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