A report for 2009 Java Certification Day

The event mainly introduce the updates of the Java technology. There are some interesting stuffs I would like to share with you ^_^

JavaFX:
The JavaFX technologies is great & it is a real cross platform environment. Developers can focus on the applications and no need to concern on the porting issues. JavaFX applications developed on PC could be moved to Mobile phone, MID or even TV very easily. More information could be found in http://www.javafx.com/

http://kenai.com/
It is a service where you can host your open source projects and code, as well as find and collaborate with developers of like mind. The presenter just demostrat a few steps to clone & creatre a facebook application & it is real interesting. As you don't need to understand PHP or some other coding language — such as Ruby on Rails, JavaScript, or Python — especially one that has a client library for our API.

http://www.java.com/en/store/index.jsp
In future, Java developers can sell the applications just similar to the iPhone developer. ^_^ It is another platform to support freelance developer.

http://zembly.com/
It is a super great service. It inspire the developer to collaborate with other developers of like mind. It is an excellent collaboration of the software development flow. NetBean 6.7 IDE will support this service. ^_^

LeJOS:
LeJOS (Lego Java OS) is an open source project. It allow you to program LEGO MINDSTORMS NXT in Java. For information could be found in http://lejos.sourceforge.net/index.php

What next?
SUN & Oracle is going to be merge & some new big things are coming. Let see what happen ^_^

First trial to compile Android (Part 2)

1) To install the cross compiler for your target device.
e.g. arm-2008q1-126-arm-none-linux-gnueabi-i686-pc-linux-gnu.tar.bz2

It can be downloaded from codesourcery.com

2) Download the Linux kernel linux-2.6.25-android-1.0_r1.tar
$ tar -xf linux-2.6.25-android-1.0_r1.tar

3) Downlaod the Linux version Android SDK android-sdk-linux_x86-1.5_r2

4) To assemble the root file system.
i) To download the busybox under linux environment. http://benno.id.au/blog/2007/11/14/android-busybox
ii) To run the emulator from the SDK & acquire the root file system.
$./tools/emulator &
iii) The Android should be launched & user should go to the Settings & enable the folloing options.
Wait for debugger.
Show running processes.
Show screen updates
iv) Under the console, user should install the busybox as following.
$./adb push ./busybox /data
$./adb shell
$/data/busybox tar -czf system.tar.gz /system
$/data/busybox tar -czf data.tar.gz /data
$/data/busybox tar -czf etc.tar.gz /etc
$/data/busybox tar -czf sbin.tar.gz /sbin
$exit
$./adb pull /system.tar.gz ./
$./adb pull /data.tar.gz ./
$./adb pull /etc.tar.gz ./
$./adb pull /sbin.tar.gz ./
$./adb pull /init ./

5) To create the rootdisk
$ mkdir ram_disk
$ cd ram_disk
$ mkdir cache dev proc root sys tmp var
$tar -xf ./system.tar.gz
$tar -xf ./data.tar.gz
$tar -xf ./etc.tar.gz
$tar -xf ./sbin.tar.gz
$cp ./init ./

The root disk is ready now ^_^

7) The android kenel may not support the target board, user has to change the build configuration & add the platform depend codes accordingly.
e.g. /arch/arm/mach-s3c6410

8) Debug & cross compile the kernel & the rootdisk accordingly.

9) Good luck & have fun ^_^

First trial to compile Android (Part 1)

1) To install the ubuntu-9.04-desktop-i386 system.

2) To install some building packages & utilities.

$ sudo apt-get install flex bison gperf libsdl-dev libesd0-dev libwxgtk2.6-dev build-essential zip curl
$ sudo apt-get install valgrind
$ sudo apt-get install sun-java6-jdk

4) To add some system variables.

export LANG=c
export PATH=~/bin:$PATH:.
export JAVA_HOME=/usr/lib/jvm/java-6-sun-1.6.0.07
export ANDROID_JAVA_HOME=$JAVA_HOME


3) It must install the Git & Repo, please read the link in detail. http://source.android.com/download/using-repo

$ sudo apt-get install git-core gnupg
$ curl http://android.git.kernel.org/repo >~/bin/repo
$ chmod a+x ~/bin/repo
$ mkdir myAndroid
$ cd myAndroid
$ repo init -u git://android.git.kernel.org/platform/manifest.git

4) User can download the Android codes now.
$ repo sync



5) To compile the Android.

$make

6) Checking the result in myAndroid/out.

Have fun ^_^