maemo.org - Talk - JAVA on the N900 is possible!

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- - JAVA on the N900 is possible! (https://talk.maemo.org/showthread.php?t=37405)

Re: JAVA on the N900 is possible!

Quote:

Originally Posted by qole (Post 432417)

Is there a specific reason why you choose /usr/local/bin for your symlink, instead of /usr/bin? Wouldn't it be easier to just add it to /usr/bin?

makes it easier to backup & restore changes after a firmware upgrade or similar. you just have to remember /usr/local instead of every single one :)

Re: JAVA on the N900 is possible!

Update: Yes, Opera Mini runs fast enough, but it seems to have some interaction bugs under this system... Can't seem to enter text into a text field properly. The OK button doesn't do anything...

Re: JAVA on the N900 is possible!

Quote:

Originally Posted by qole (Post 432596)

Update: Yes, Opera Mini runs fast enough, but it seems to have some interaction bugs under this system... Can't seem to enter text into a text field properly. The OK button doesn't do anything...

Have you tried any J2ME games with MicroEmulator?

Re: JAVA on the N900 is possible!

Nope. Not going to either ;)
I played OpenArena on my N900 on the bus last night. Mobile phone games just don't do it for me.

Re: JAVA on the N900 is possible!

Quote:

Originally Posted by qole (Post 432605)

I'm sorry, but you're just wrong. The N900 busybox tar very definitely does support gzip compression. It doesn't support bzip2 compression, however.

Type tar at the command line; it lists [czxtv0] as the valid options.

OK. My mistake.
I had typed:

Code:

tar cvfz filename.tar.gz filename.ext

It complained of no file filename.tar.gz and created a tar file named z. It looks like f must be the last option. Every tar with gzip support that I have used before was fine with z being the last option whether creating, listing, or extracting from gzipped tar files.

I will delete my post.

Re: JAVA on the N900 is possible!

This is indeed great stuff...made a quick Swing app that fetches some train timetables from a certain WWW-page. Works like a charm! :)

Dak, have you had any luck registering the jar files so that one could start a Java app more easily?

Re: JAVA on the N900 is possible!

Quote:

Originally Posted by Dak (Post 433577)

@Xizor - I'm still tinkering with that 'auto run' mechanism.

...

PS. Did you originally download the wrong JRE? Is that why you got the "Headless" exception?

Yeah, I had the wrong JRE...I was sure I downloaded the right one, but maybe it's time to start thinking about them glasses. :D

One thing I noticed is that the java application (using Swing) takes a really long time to start (almost 10 seconds). There probably is nothing that can be done to speed this up....

Re: JAVA on the N900 is possible!

Quote:

Originally Posted by Dak (Post 433662)

Yep...that's part of the overhead involved in setting up the JVM, loading all the bytecode, initializing it and then letting it run. I guess it's up to Sun to optimize this process, but I wouldn't expect significant improvement unless they can implement some safe 'lazy optimization' for startup.

But it's a 600MHz ARM chip....whaddayagonnado? Imagine how treacly that same code would run on a 600Mhz pentium ;)

The important thing is that it runs respectably well once it is loaded. I'm pleased with it.

I think this leads to the inevitable conclusion that Java on the N900 should be used sparingly and with due consideration to the bandwidth limits we face.

My strategy, if I use it at all, will be to prefer crafting very thin, lightweight clients that provide a visual surface for a native core...accessed via JNI/sockets.

You are absolutely right...you can't do wonders with the given hardware and once the app is running the performance seems to be quite good.

It would be really interesting to see a java application using the phones native API's via JNI. :)

Re: JAVA on the N900 is possible!

Quote:

Originally Posted by qole (Post 432635)

Nope. Not going to either ;)
I played OpenArena on my N900 on the bus last night. Mobile phone games just don't do it for me.

How is the game play without a mouse? I could never play quake without mouseview. ..

Re: JAVA on the N900 is possible!

with auto-aim ofc =)