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Then I read that "Oracle has withdrawn their support for JavaFX Embedded [...]"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 )

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

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)

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 ^^:

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

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



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



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

Proof:
I downloaded which is headless.
I downloaded 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 file from the headful HardFP archive and copying it to the complete created JRE folder And you were done...




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EDIT:

Perhaps someone would be so kind as to help me getting JavaFX working on Maemo 5
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 ^^

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


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Cya Pilo11