Can I import Java class files into JRuby?

require 'java'
require 'target/foo/Bar'

module Foo
  include_package 'foo'
end

puts Foo::Bar.new

foo.Bar@1582a7c

require 'java'
$CLASSPATH << "target"

foo.bar.baz.Class.new() # ...
# or
java_import 'foo.bar.baz.Class'