Jato is an implementation of the Java virtual machine. It includes a VM and a JIT compiler for the x86 machine architecture and supports the JNI API. Jato uses Boehm GC as its garbage collector and relies on GNU Classpath to provide essential Java APIs.
- JIT-only execution on x86 architecture
- Uses GNU Classpath for essential classes
- Boehm garbage collector
- Runs on Linux
Fedora
$ sudo yum install ecj libffi-devel binutils-devel glib2-devel bison llvm-devel llvm-static
Ubuntu
$ sudo apt-get install ecj libffi-dev binutils-dev libiberty-dev libglib2.0-dev bison llvm-dev
Archlinux
$ pacman -S eclipse-ecj classpath libffi
GNU Classpath needs to be built and installed from sources.
First install dependencies that are required to build GNU Classpath:
Fedora
$ sudo yum install java-1.7.0-openjdk antlr GConf2-devel gtk2-devel gettext-devel texinfo
Ubuntu
$ sudo apt-get install openjdk-6-jdk antlr libgconf2-dev libgtk2.0-dev ecj fastjar pccts
Then clone the sources from the git repository (the release 0.99 appears to be broken)
git clone git://git.savannah.gnu.org/classpath.git
You can then compile GNU Classpath:
$ ./autogen.sh
$ ./configure --disable-Werror --disable-plugin
$ make
and install it to /usr/local:
$ sudo make install
To compile the VM and run all the tests:
$ make check
All tests should pass.
You can now install Jato with:
$ make install
The command installs an executable jato to $HOME/bin.
Jato uses the same command line options as java.
To run a class:
$ jato <class name>
To specify classpath, use:
$ jato -cp <jar files or directories> <class name>
You can also execute a Jar file with:
$ jato -jar <jar file>
Jato also supports variety of command line options for debugging and tracing
purposes. See the file Documentation/options.txt for details.
Copyright © 2005-2013 Pekka Enberg and contributors
Jato is distributed under the 2-clause BSD license.