Programming :: Adding An Item To A Java Swing Jlist?
May 4, 2011
I need to make a quick gui to interface with another application. I'm using Java swing to produce it, however have no experience with JAVA. I have used net bean to produce the gui. At one part I have a jList private javax.swing.JList jSymbolList1;
I want on a button press to add or change members of the list from a text field. I thought I could so this simply by using the addelement eg jSymbolList1.addElement("hello world"); However this produces an error. Can anyone tell me how to add a string or how to change a string at a set position?
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Jul 30, 2011
java version "1.6.0_20"
OpenJDK Runtime Environment (IcedTea6 1.9.8) (fedora-53.1.9.8.fc14-i386)
OpenJDK Client VM (build 19.0-b09, mixed mode)
I want to add a vertical slider to a JTextPane component. When I do, I get the slider but I don't get a thumb - i.e. the slider doesnt do anything here is my code
Code:
JPanel dataPane = new JPanel(); // create panel dataPane
ta2 = new JTextPane(); // textpane
if (true)
[Code]...
the (true) lets me do something like ifdef to try out my new ideas as you see, this code comes when I create the object but before I populate it. maybe I need to do something after I populate the textpane?
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Mar 18, 2010
why the message string isn�t output to the Applet window in the code below?
Code:
import javax.swing.*;
class printit extends JApplet {
[code].....
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May 25, 2011
Ok, first is it possible to take a program I wrote and make it to be a entry in the right menu of a file browser program.
Also, can this happen if the program is developed in Java?
OpenSuSE 11.4
Kde 4
Dolphin(file browser)
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Nov 28, 2010
Is it possible to have an array in Bash that can hold more than one value per item?
For example I would like an array like this:
Entry 1: apple, green
Entry 2: banana, yellow
And be able to call the fruit names and their colour in a list. Something like:
for fruit in "${array[@]}"
do
echo a $fruit is $colour
done
If that is possible, is there a limit to values per item? For example some entries in an array could be:
Entry 1: apple, green, round, pips, tree
Entry 2: banana, yellow, long, skin, tree
And I would like to pick out the values such as #3 being "round" and "long".
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Apr 13, 2010
I have my own declared types and I have to operate with lists of items. I wish to write a one macro, instead of using a function for each type. It's intended to be like this: Code: #define ____append_to_list(head,
item, type)
type* ptr;
for ( ptr = head; ptr->next != NULL; ptr = ptr->next )
[code].....
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Jul 14, 2010
I was reading some code the other day and thought that I saw they were using the list.pop method to pop of more than one item at a time. Something like this.
Code:
l = [ 'a', 'b', 'c', 'd', 'e' ]
l.pop(0:3)
['a','b','c']
l
['d','e']
But of course when I looked at invoking the method, it only works for one item at a time. I'm working on a data structure where I'm parcing weather data that is 15 items long that are return in as data in a list that has 3,000 + items. I was wanting to pop off a lists of the 1st 15 items breaking them into chuncks (still trying to figure out how I'm going to store the associations as each day has 2-4 readings an hour for the past 72 hours, so I was wanting to group the days together but have each data point for each time).
I know I can just write a function (with some additional tweaking needed for neg starts to work on the right end):
Code:
def longpop (seq, length=1, start=0):
slice = seq[start:start+length]
del seq[start:start+length]
return slice
But with increasing data sizes, I was wondering if there was a faster built-in way of doing this (perhaps implemented under the hood written originally in C as an extention, for example).
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Mar 7, 2010
Groovy is an object-oriented programming language for the Java platform. I do not have experience in Java, only perl and shell scripts. Recently I have been asked to maintain a software written in groovy (also to make enhancements). So can I learn groovy without knowing java language. or isit I have to learn java before venturing into groovy.
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Mar 1, 2010
I have a problem on a program,the problem take a very long time when i try to add two big arrays element by elementI know that matlab make adding vectors more faster than adding element by element but I don't know how!!!do any body knew how matlab make vectors operations more faster than element by element???I want to make my calculation more faster because the program is very big
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Jun 6, 2010
Im trying to create the following script...I want to create an interactive script that prompts the user for the following:
user name
user home directory
user login shell
user comment
the script then needs to read those variables that are entered by the user and actually create the user account. and of course, would like the script to display what user account was just created so that i know in fact the script worked successful.
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Jun 9, 2011
i am searching for a table that gives info about the result of operations (+ , - , * , /) on data types
i mean if we * int by another int, the result should be assign in long so no overflow happens.
something like that.
like what will be the result of mult unsigned int by signed it , is there tables for such operations.
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Apr 2, 2009
I have made the installation of Qt4 in my Fedora/MacBookPro. It also got a first compiling and running a simple program. The point is that for the compiler to run I need to point out every time where the bin is located, as that:
$ /home/threader/kinetic/bin/qmake -project
I have tried the following, but it still doesn't work:
# script
#-----------------------------------------------------------#
# /etc/bashrc or /home/threader/.bash_profile
# config to Qt compiler
[code]....
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Apr 10, 2010
I use following script:-
Code:
#!/bin/sh
# cd Linbread
TODAY=`date +"%m%d"`
DATA=`grep $TODAY linbread.dat`
[code]....
sound file .wav and background .gif are available. Please advise what shall I add to the script to do the job as expected.
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Jan 30, 2010
So I decided to take my first steps into programming with C + gtk. So far I have doneI loaded eclipse and ensured I had the cdt package Created a new C/C++ project called "play" Added a new source file called "Playfullsrc.c" Added the following to paths and symbols (output of the command: pkg-config --cflags gtk+-2.0)
Code:
/usr/include/gtk-2.0
/usr/lib/gtk-2.0/include
/usr/include/atk-1.0
/usr/include/cairo
/usr/include/pango-1.0
/usr/include/pixman-1
/usr/include/freetype2
[Code]....
added "/usr/lib/libgtk-x11-2.0.so" to GCC C Linker Libaries (I have cheacked and this file exists) When I build the project I get the error message "cannot find -l/usr/lib/libgtk-x11-2.0.soplayline 0C/C++ Problem" I have been following this tutorial: [URL]
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Dec 18, 2010
I have a file for plotting contour graph in gnuplot.The data in the fine as below:Quote:
1 1 3
1 2 7
1 3 6
[code]....
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Sep 16, 2010
I have a debian lenny machine that I am trying to add mod_perl to and use apache asp on. I have had a range of failures on it. Is ther a way I can build apache2 with mod_perl in it? Instead of separate. Apache2 is built with some modules built in by default, how can I make mod_perl one of them?
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Jan 15, 2010
I need to basically add some code to like 50 php files. It's basically a script that I want to add near the end of these 50 php files. I figured I could use sed to replace </body> with the code. However the code, is very long and has a bunch of newlines obviously. How would I be able to do this?
sed -e 's/<//body>/(all the text)/' *.php
Since it has newlines, I don't know how to paste it in cause it would take me to a '>' prompt without allowing me to complete the sed command. I want to insert this code.
Code:
<br><br>
<center>
<form action="test.php" method=post>
<textarea name="comments" cols=40 rows=6>
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Jan 6, 2011
how to implement this.
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Mar 18, 2011
I am a C++ programmer and never used Perl. add a functionality to a script, in Perl language. Originally, the script takes 1 file input and I run it in this way: ./script.pl file1 It is designed to return specific words from that file, example:
user
admin
printer-1
user-2
server
The idea is that I need to be able to provide the script with a second input file that contains only few words, each on a new line. These words might have a "dash". Example:
printer-2
server
user-2
I will be running the script as: ./script.pl file1 file2 In return, the script should check if every word in file1 does exist in file2. If it does exist, then the script displays it. In the example I provided above, the script should only return:
server
user-2
Here is the script I have. What's in black is the original working Perl script and what's in red is what I would like to add in Perl Language:
!/usr/bin/env perl
my ($table);
for (every value in file2)
{
[code]....
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May 2, 2011
I am running on windows, i don't have strlcpy() function as it's not a standard function, so i want to add it to my library, i know how to do that thankfully ^_^This is the function:
Code:
/*$OpenBSD: strlcpy.c,v 1.11 2006/05/05 15:27:38 millert Exp $*/
/*
[code]....
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Mar 10, 2011
I'm building an RPM that requires adding a cron job into a user's(service account) crontab...from what I see in the manpages, this isn't possible, as the only viable option is to replace the crontab entries already there for previous scripts being run. Either way, as an example I've found I can make it work by directly modifying the crontab file using:
Code:
echo "* * * * * /bin/ls -la ~/ >> ~/ls.log" >> /var/spool/cron/userName
I'd just like to know, is there any MAJOR issues with modifying a the crontabs like this? This is running on a Redhat Enterprise Linux server by the way.
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Mar 19, 2010
i have two scripts called:
"type" & "selecttype".
In "type" i have only the name of the products ex.: product1 & product2. Now, i have to ADD product3 which includes sub categories: productA, productB, productC, productD, productE, productF. so my New type script (menu) looks as below:
1) product1
2) product2
3) product3
and my current selectype looks how can I add the new product3 argument with all other multiple selections (productA, productB, productC, productD, productE, productF) into my current selectype (as below which is set only for product1 & product2), so when a user select: 3) product3 from "type" would get a new menu of all the sub categories, and the script would process the new additional arguments.
Here is the copy of my selectype script:
#!/bin/sh
echo SELECTTYPE
export -n selecttypechoice
if [ "${upgrade}" == "yes" ] ; then
[code]....
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Jan 25, 2010
I'm having problems adding up column totals using arrays. I've got it to add up the row totals and display at the end of the row. Here is my code so far
Code:
#include <stdio.h>
#include <string.h>
const int maxrows=10;
[code]...
What i need it to do is, add up the columns and display it at the bottom of each column similar to how the row totals display
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Mar 12, 2010
I would like to run java program on fedora10 but I am facing some problems. When I use which java command it show usr/bin/java directory. I was trying to set the java_home path in bash_profile,but there is no affect.
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May 12, 2011
Situation: this semester I took an class called Introduction to Software Design with Java.It was my first intro to programming. The class had a very odd structure:1. The text was extremely high level. The first few chapters were all about object oriented programming, how objects interact, all about specification, etc (without ever talking about implementation).2. The lecture simply followed (directly) the text. And as a result was rather uninteresting.3. While highly theoretical (in that it was very high level approach), we never talked about how the computer was dealing with the information, etc.as all very "hand waving/magic" approach.
Okay so enough of the complaints:Question: This summer I'd like to dive a bit more into a language mainly out of frustration and lack of a good book. I'm thinking perhaps a lower level language.1. Would C++ be a good second language? Or should I give Java more time?2. If I am going to go with something else, is C++ sufficiently different, or should I go with C
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Apr 8, 2010
i want to compile function c in java and compile library is success.. when i call the library in java and error is :
Exception in thread "main" java.lang.UnsatisfiedLinkError: no libfunc.so in java.library.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1689)
at java.lang.Runtime.loadLibrary0(Runtime.java:823)
at java.lang.System.loadLibrary(System.java:1028)
[Code]....
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Jul 26, 2010
I've just installed java (jre-6u21-linux-i586.bin) on Red Hat 4.4 AS and issued this command to check the java version: java -versionand got :bash :java: command not found
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Apr 27, 2010
There is a module A which is compiled with the kernel. I wrote an external module B which exported a symbol using EXPORT_SYMBOL.The module A now needs to talk with that exported symbol (function call). For that i modified A so that it includes the function call from B. However i now get unidentified symbol errors during 'make' operation as symbols of B are not present during kernel compile and A now kind of depends on B.
One solution is that make B part of the kernel as well. However, it would mean that whenever now i try to compile a kernel with a different source, i have to modify the config files and everything to accommodate B.Hence i am seeking a solution which does not include modifying the kernel.
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Apr 27, 2010
I can't get x to work with a mouse so I have to use a windows computer to do that from for now. The problem is I remember there being something about windows using a newline AND carriage return and linux just using a newline. I was about to cut and paste code but the lines go on and on instead of breaking off where they did in linux. I was going to write a perl script but don't know how to add a carriage return to the end of each line.
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Aug 13, 2010
I want to call c exe from java source code and i want to interact with the c program during it's execution, i am able to send the parameters to c program but i am not able to interact with it.
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