JamVM - Java Virtual Mashine for IPhone, has been updated. New version 1.5.1b2-17 is avaliable through Cydia Installer.
Here is a screenshot of the icon and application itself:
The application consists of several files:
This is a tutorial, that shows step by step how to use installed Java on the IPhone. Just in case you do not have Java installed on your IPhone there is a
Step 1: Create simple Java application, compile and run.
This is a tutorial, that shows step by step how to install Java on the IPhone.
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:
With this tutorial you will be able to install Java on the IPhone, compile and run simple Java applications using IPhone.
I decided to split this tutorial into two different ones. So here they are:
Have fun and leave comments.
The most interesting Hardware part is a GPS receiver and a camera for video conferencing.
On a software level, Apple describes addition of a text messaging (chat), in-line multimedia content (Quicktime and Flash) in the Safari browser. Further welcome additions described in the publication would include a dedicated blogging client, Java software downloads, MMS picture and video messaging, support for voice-activated commands, audio capture, video conferencing and more.
“Examples of other applications 136 that may be stored in memory 102 include other word processing applications, JAVA-enabled applications, encryption, digital rights management, voice recognition, and voice replication. ”
It sounds like Apple wants Java to be on the IPhone
JamVM is a new Java Virtual Machine which conforms to the JVM specification version 2 (blue book). In comparison to most other VM's (free and commercial) it is extremely small, with a stripped executable on PowerPC of only ~200K, and Intel 180K. However, unlike other small VMs (e.g. KVM) it is designed to support the full specification, and includes support for object finalisation, Soft/Weak/Phantom References, class-unloading, the Java Native Interface (JNI) and the Reflection API.JamVM currently only includes an interpreter (keeps it small). However, the interpreter is highly optimised, and performance is on par with a simple JIT. As most of the code is written in C it is easy to port to new architectures.
Here are some extracts from
"To show Java's prominence in multimedia, rock icon Neil Young made an appearance onstage to promote his video and music catalog offering based on Java and Blu-ray technology. A Sun official also briefly commented on Sun's predicament in trying to put Java on the Apple iPhone, leaving the ball in Apple's court to help make that happen."
"During the post-keynote press conference, Green gave a progress report on Sun's ongoing quest to put Java on the iPhone, something that Apple has not publicly, at least, supported.
Sun, Green said, is well along its way in creating the technology to enable Java to run on the phone, Green said. But he deferred to Apple, which governs which platforms can be distributed with the iPhone. It is Apple's right to decide this, Schwartz added."