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Java
Posted: Fri 28 Dec 2012, 07:12
by jpeps
I've been experimenting with java as a cross-platform language, and wrote a library database that works nicely on linux and windows with the latest Java JRE binaries (an easy download from Oracle does it). Run the files with "java -jar file.jar" I had to switch to OpenBox WM, since there's a conflict with JWM and java files.
Here's a library app to test. <Add> or <Remove> handles books on a clickable alphabetized list. Clicking an item writes the title and author into the entry boxes, and posts the original entry date. There's a button for getting the total number of books.
Data from the book class is written in XML format into the mlData folder, along with the book-list.
http://jpeters.net/apps/MyLibrary3.jar
Updated: Cut File size by a third; added publish info.
Updated: Streamlined code.
Updated: 4/4/13
All data now in one MyLibrary.xml file
Add author and title search buttons (repeated click gets next selection)
Posted: Sun 30 Dec 2012, 19:44
by jpeps
Working jre: (updated)
http://www.jpeters.net/apps/jre1-7.0.13-001.sfs.tar.gz
ffde09235525e75dd8468741cc361123
Posted: Thu 03 Jan 2013, 04:11
by jpeps
I was able to knock 63% off use of RAM with -Xmxn option (n=size). 2m is minimum.
example: in ROX, set run action to:
java -Xmx2m -jar "$@"
Posted: Sat 05 Jan 2013, 07:46
by jpeps
Here's a text editor I built that sorts alphanumerically or by line size to a "sort.txt" file. This one's only 8K. Create and save a new list from within the editor, or just copy over the file.
Updated: includes open, save as dialogs. Closing with exit button records last file, which opens on next session.
Updated: includes a line number sort.
Posted: Sun 06 Jan 2013, 19:05
by jpeps
Updated the sort editor with open file and save as dialogues. It's still about 12K, and runs fast even on my old dell. Also, it runs on everything I tested it on. I'm definitely rethinking the whole java thing.
Posted: Sun 06 Jan 2013, 22:35
by sunburnt
Yep, that`s what drew me to it many years ago.
And it ( like C ) does very well in the portability department.
I was dismayed by the long learning curve, but it`s much like C.
It needs a really good class browser that has many search methods.
The other thing is... Does it compile to binary ( can`t remember ).
### The thought that I had...
Android is nearly a tablet + desktop O.S. ( amigo called it an interface ).
I`m thinking that making it desktop capable would kill Linux and Weeners.
Posted: Mon 07 Jan 2013, 00:29
by jpeps
sunburnt wrote:
I was dismayed by the long learning curve, but it`s much like C.
It needs a really good class browser that has many search methods.
There are great tools like Eclipse that make it quite easy. Eclipse will offer suggestions and insert code for you as you program. There's also a ton of help on the internet.
The other thing is... Does it compile to binary ( can`t remember ).
Yes...it writes "bytecode" to the Java Virtual Machine
### The thought that I had...
Android is nearly a tablet + desktop O.S. ( amigo called it an interface ).
I`m thinking that making it desktop capable would kill Linux and Weeners.
Interface, as in extension vs replacement sounds correct. The JVM still doesn't exploit the individual computer's hardware (graphic card, etc) very efficiently. There's currently lots of development going on, so things should only improve. For programmers, it's a tool you can really sink your teeth into.
Posted: Mon 14 Jan 2013, 00:02
by 01micko
jpeps,
What's the conflict with jwm? Joe is currently working on jwm and has written some java stuff too, so he should be able to fix it.
Posted: Mon 14 Jan 2013, 01:01
by jpeps
01micko wrote:jpeps,
What's the conflict with jwm? Joe is currently working on jwm and has written some java stuff too, so he should be able to fix it.
Text entry loses focus, and you can't get it back.
Posted: Mon 14 Jan 2013, 01:52
by 01micko
jpeps,
Do you mind trying the latest version and see if it continues? You'll have to compile it.
http://joewing.net/projects/jwm/snapsho ... 52.tar.bz2 , direct link to source
Posted: Mon 14 Jan 2013, 03:36
by jpeps
Posted: Mon 14 Jan 2013, 03:49
by 01micko
Ok, I see it too, Even Joe's program (ShareBrowse.jar) doesn't work. I'm sure his geek pride will want that fixed.
Posted: Mon 14 Jan 2013, 04:07
by jpeps
01micko wrote:Ok, I see it too, Even Joe's program (ShareBrowse.jar) doesn't work. I'm sure his geek pride will want that fixed.
Posted: Mon 14 Jan 2013, 04:48
by 01micko
jpeps wrote:01micko wrote:Ok, I see it too, Even Joe's program (ShareBrowse.jar) doesn't work. I'm sure his geek pride will want that fixed.
Reported.
Posted: Tue 15 Jan 2013, 22:43
by 01micko
Fixed in JWM-653
.. now I can try your programs
Posted: Tue 15 Jan 2013, 23:48
by jpeps
01micko wrote:Fixed in JWM-653
.. now I can try your programs
damn....you're my hero
works!
Posted: Fri 18 Jan 2013, 06:32
by jpeps
Updated the sort editor with a line number sort; parses out and sorts numbers at the beginning of a line, eliminates blank lines, sorts non-numeric lines after the number lines, etc. The alphanumeric sort orders numbers 1-9 and then places 10 after 1.
Interesting thing about java, is that you build the function in a separate, reusable class which can then be used by other projects.
Posted: Sat 02 Feb 2013, 18:35
by jpeps
Updated working jre to latest security patch (on first page)
Posted: Sat 02 Feb 2013, 20:33
by 01micko
jpeps wrote:Updated working jre to latest security patch (on first page)
Thanks for that. By chance do you have a build script for java? Kind of a tarball to sfs thing?
Posted: Sun 03 Feb 2013, 01:17
by jpeps
01micko wrote:jpeps wrote:Updated working jre to latest security patch (on first page)
Thanks for that. By chance do you have a build script for java? Kind of a tarball to sfs thing?
It was a little tricky getting the link to work.
Code: Select all
#!/bin/sh
jre="jre1.7.0_17"
temp="jre1.7.0_17_001"
mkdir -p "/tmp/${temp}/usr/local/bin"
mkdir -p "/usr/local/${jre}/bin"
## GET PACKAGE
wget -O "/tmp/${jre}.tar.gz" http://javadl.sun.com/webapps/download/AutoDL?BundleId=75250
## UNPACK AND MOVE TO NEW FOLDER
cd /tmp
tar -xvzf "/tmp/${jre}.tar.gz"
mv "${jre}" "${temp}/usr/local"
## COPY JAVA FILES FOR LINKING
cd "${temp}/usr/local"
cp "${jre}/bin/java" "/usr/local/${jre}/bin"
cd "/tmp/${temp}/usr/local/bin"
ln -s "/usr/local/${jre}/bin/java" .
## CHANGE NAME FOR SFS BUILD
cd /tmp
mv "${temp}" "${jre}"
dir2sfs "$jre"
## Change name and CLEAN UP
name="$(ls | grep jre1*sfs | grep -v "txt")"
mv "$name" jre1-7.0-17.sfs
rm -r "/usr/local/${jre}"
rm -r "/tmp/${jre}"
rm "/tmp/${jre}.tar.gz"
rm /tmp/jre1*txt
echo "jre1-7.0-17.sfs is in /tmp"