ant-core : Java-based build tool similar to 'make' that uses XML configuration files ( http://ant.apache.org/ )
eclipse-ecj : Eclipse Compiler for Java ( http://www.eclipse.org/ )
gnu-classpath : Free core class libraries for use with VMs and compilers for the Java language ( https://www.gnu.org/software/classpath )
icedtea : A harness to build OpenJDK using Free Software build tools and dependencies ( http://icedtea.classpath.org )
jamvm : An extremely small and specification-compliant virtual machine ( http://jamvm.sourceforge.net/ )
jikes : IBM's open source, high performance Java compiler ( http://jikes.sourceforge.net/ )
openjdk : Open source implementation of the Java programming language ( https://openjdk.org )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a gentoo-bootstrap
For Paludis use this rsync : rsync://gentoo.zugaina.org/gentoo-bootstrap-portage
If you have a problem : ycarus(-at-)zugaina.org