maemo.org - Talk - Java for Maemo 5

I tried to install Java 8 on Maemo 5 (N900) and it worked (headless). But I wanted to run my own Java applications (with GUI) to make my N900 useable in 2016 (Telegram for Java, own java, applications, ...)

Then I read that "Oracle has withdrawn their support for JavaFX Embedded [...]"
(h t t p s : / /jaxenter.com/jdk-arm-without-javafx-end-javafx-embedded-114212.html) :(

I decided to work on Java Swing at least. But I only found headless embedded Java environments...

Nevertheless I build my own JAVA JRE 8 to launch Java Swing application on my N900:

I downloaded Java SE Embedded (SoftFP, LE):
h t t p : / /download.oracle.com/otn-pub/java/ejdk/8u111-b14/ejdk-8u111-linux-arm-sflt.tar.gz
or
h t t p : / /www.oracle.com/technetwork/java/embedded/embedded-se/downloads/index.html

(the HardFloatingPoint version did not work for me :D)

and copied it on the device,
extracted the archive (to /opt/ejdk-8u111/)

Code:

tar xvzf ejdk-8u...

and ran the /opt/ejdk-8u111/bin/jrecreate.sh:
(more information: h t t p s : / /docs.oracle.com/javase/8/embedded/develop-apps-platforms/jrecreate.htm)

Code:

./opt/ejdk-8u111/bin/jrecreate.sh --dest /opt/jre_builded

This will create the JRE in the jre_builded folder without Java Swing support (headless) and trust me it is going to take very long (at least 4-5 hours).

After 100 teas (or more ^^) I linked the java executable file to my /usr/bin

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EDIT:

I forgot to mention that you need to do this ^^:

Code:

chmod +x /opt/jre_builded/bin/java

Without doing this you are not able to use the link to /usr/bin :D

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Code:

ln -s /opt/jre_builded/bin/java /usr/bin

Now, it was time to test a simple JAVA application (hello world) and it worked :cool:

https://s14.postimg.org/mtnnwy5td/Sc...120_102340.png

But I also wanted to run my Java Swing helloWorld test application.
Something strange happened:

https://s17.postimg.org/lwhvtpzkf/Sc...120_103336.png

The created JRE is headless :(

I googled for a while and found this StackOverflow topic (I love StackOverflow!)

h t t p : / /stackoverflow.com/questions/34643571/how-do-i-make-jrecreate-compile-a-headful-jre/34644174#34644174

This guy shared a very funny idea with the community. He said:

Quote:

Apparently including the lib/arm/libawt_xawt.so file from another distribution (like the already headful HardFP one) is enough to tell Java to not be in headless mode anymore, and to properly load the awt library.

Unfortunately Oracle does not mention anything about their JAVA 8 Embedded archives if they are headful or not.

Proof:
I downloaded

Code:

ARMv5/ARMv6/ARMv7 Linux - SoftFP ABI, Little Endian 2

which is headless.
I downloaded

Code:

ARM v6/v7 Linux - VFP, HardFP ABI, Little Endian 1

which is headful.

But it is not written down on the website...

So what I did and what you can do is grabbing this little

Code:

lib/arm/libawt_xawt.so

file from the headful HardFP archive and copying it to the complete created JRE folder

Code:

/opt/jre_compiled/lib/arm/libawt_xawt.so

And you were done...

https://s14.postimg.org/6jxhu1v5d/Sc...120_102518.png
https://s14.postimg.org/g5r2acmb5/Sc...120_102529.png

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EDIT:

Perhaps someone would be so kind as to help me getting JavaFX working on Maemo 5 :D
I'll try it the next weeks but it will be almost impossible to do this without thinking about it hard ^^
and without wasting weekends for this shhhhhh... shaving cream
Excuse my language ^^ :cool:

If you want to help me or if you have any ideas, please write me: pilo.eleven@mail.ru
:D

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Cya Pilo11