Java
From Chumby Wiki
Revision as of 14:15, 13 October 2006 by 24.30.157.165 (Talk)
NOTE: this page is under development
How to build a simple java virtual machine for the chumby (assumes you have the development tools installed):
Contents
- 1 Building JamVM
- 1.1 Create a directory to hold the package
- 1.2 Download the source code
- 1.3 Unpack the source code
- 1.4 Configure and build
- 1.5 Strip the binary
- 1.6 Install
- 1.7 Download and unpack GNU classpath
- 1.8 Build classpath
- 1.9 Building a "java dongle" for chumby
- 1.10 Too lazy to do all this?
- 1.11 Run programs!
Building JamVM
Create a directory to hold the package
mkdir ~jamvm cd jamvm
Download the source code
Go here and download the source code into ~/jamvm
Unpack the source code
tar xzvf java-1.4.3.tar.gz cd javavm-1.4.3
Configure and build
./configure --build=i386-linux --host=arm-linux --prefix=/usr/arm-linux make
Strip the binary
arm-linux-strip src/jamvm
Install
sudo make install
This will copy the virtual machine to /usr/arm-linux/jamvm
, and the custom class libraries to /usr/arm-linux/share/classes.zip
Download and unpack GNU classpath
cd ~/java
Download classpath-0.91
tar -xzf classpath-0.91.tar.gz cd classpath-0.91
Build classpath
You'll need to have jikes installed (for Kubuntu, sudo apt-get install jikes
)
./configure --build=i386-linux --host=arm-linux --prefix=/usr/arm-linux --with-jikes --disable-gtk-peer --disable-alsa --without-x --with-jni make sudo make install
Building a "java dongle" for chumby
- copy
/usr/arm-linux/bin/jamvm
to the dongle - create a directory
lib
on the dongle - copy
/usr/arm-linux/share/classes.zip
to thelib
directory on the dongle - copy the contents of
/usr/arm-linux/lib/classpath/*.so
to thelib
directory on the dongle - copy the contents of
/usr/arm-linux/lib/classpath/*.zip
to thelib
directory on the dongle - copy the contents of
/usr/arm-linux/share/classpath/
to thelib
directory on the dongle - create the file
java
on the dongle with the contents:
#!/bin/sh LD_LIBRARY_PATH=/mnt/usb/lib /mnt/usb/jamvm -mx8M -Xbootclasspath:/mnt/usb/lib/classes.zip:/mnt/usb/lib/glibj.zip $@
Too lazy to do all this?
Just download chumby_jamvm.tgz (7.5MB) and unpack onto your dongle.
Run programs!
For example, if you have a program Hello.java
compiled to Hello.class
, you can run it with:
# java Hello Hello World #