Tutorial: install Java on the IPhone
This is a tutorial, that shows step by step how to install Java on the IPhone.
What we need is a working unlocked and jailbraked IPhone with Installer. I used latest firmware 1.1.4, unlocked, jailbreaked and customized by winpwn.
First of all I’d like to say we all want to use legal IPhones and operators. So everything written below is for testing purposes only :-). Hopefully this technology will be avaliable on all IPhones sold worldwide. You also might need to recover your IPhone, so make sure you backed up all your data. I personally did everything without any problems and needs to recover. Everything you do is your responsibility, etc…
So let’s start, because it’s worth it! It’s just one evening and you will be able to create your personal Java application, compile and run it on the IPhone, and amaze all your friends :-).
There are two steps:
Step 1: Go to Installer and install Mobile Terminal and Cydia Installer.
- Go to Settings -> General -> Auto-Lock and set it to Never. This will avoid some troubles during installation.
- Run Installer. Repository for Terminal should be already there (BigBoss), because it is in latest Community Sources.
- Add repository http://apptapp.saurik.com for Cydia Installer and refresh
- Go to Install -> System
- Find Term-vt100 - Mibile Terminal App. I used version svn278. Install it.
- Go to System again and find Cydia Installer - The Future of the IPhone. I used version 1.0. Install it.
- Exit. Restart IPhone. Two icons for Terminal and Cydia should appear.
Here are some screenshots for Step1:
Step 2: Go to Cydia Installer and install Java.
- Run Cydia Installer.
- Go to Install - Java section. You will find many programms there.
- Select IPhone/Java. It will install most of the needed packages, which includes vm, libraries, etc.
- Click confirm and wait a little bit.
- Go to Java section again and install Jikes package (itwill be probably the only one left). Jikes is a compiler.
- Go to Installed Packages tab. Check that Classpath, IPhone/Java, JamVM, Jikes are installed. Several other packages will be there too (Java SQLite, JocStap, etc).
- Exit Cydia and restart IPhone. Congratulations!!! You’re done installing Java.
That’s it. The tutorial about using all this stuff is here 
8 Responses to 'Tutorial: install Java on the IPhone'
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got problem with the repository
when i try add it in cydia its say is not a right address.
the adresse in this guides says.
http://apptapp.saurik.com
anyone know what to do?
dach
Thursday January 8th, 2009 at 01:34 PM
Hello
I am new to the iPhone community and just wanted to check if I jailbreak my iPhone and install java will I be able to run .jar mobile applications. I would like to use a text application from fishtext.
Cheers for your help
Riaan
ollie
Wednesday May 27th, 2009 at 12:04 AM
2dach: For firmware 2.x you do not have to add repository, just go to section Java and install.
admin
Wednesday May 27th, 2009 at 01:15 AM
2ollie: no you will not be able to run regular jar monile app. There is support only for command line and user interface through special libs (jocstrap). The application has to be written on Java specially for iPhone
admin
Wednesday May 27th, 2009 at 01:17 AM
does this work on ipod touch?
jampster09
Wednesday June 3rd, 2009 at 04:49 PM
aw it works! but i can only compile simple program
jampster09
Wednesday June 3rd, 2009 at 05:48 PM
it should work on iPod Touch
admin
Wednesday June 3rd, 2009 at 08:50 PM
I found a program in the Package IPhone/Java ,and unpacked it,in the data.tar.gz file ,i found HelloJava.app,so i copied it to my iPod,and ran it .
It did run,but i couldn’t see any windows on the screen. Using the ps command ,it was sure in the processes.
Does anybody know why?
Thanks
WithRat
Thursday June 25th, 2009 at 04:00 AM