thufir@arrakis:~/sun_tutorial$ 
thufir@arrakis:~/sun_tutorial$ cat build.rb 
require 'compile'


compile
thufir@arrakis:~/sun_tutorial$ 
thufir@arrakis:~/sun_tutorial$ cat compile.rb 
def compile
        puts "compiling..."
        puts "..."
        puts "how do I compile HelloWorld.java?"
end
thufir@arrakis:~/sun_tutorial$ 
thufir@arrakis:~/sun_tutorial$