Serabe

#coding:utf-8
#este programa emula un videojuego de coches en el que el usuario intenta llegar a la meta en menor tiempo posible
#Para observar cómo funciona basta con ver los dos primeros niveles, pues los otros son copiados de los anteriores
from random import random
from time import time
#Esta función se encargará de obtener aleatoriamente una posición para los coches enemigos
def azarf(x):
 a=random()
 if a<=(1/3.0):
   azar=1

Serabe

class Module
  def optional
    [self,:optional]
  end
end

a = [Range, Fixnum.optional, String.optional] #=> [Range, [Fixnum, :optional], [String, :optional]]

Serabe

class Module
  VALID=[:optional, :rest_arg]
  def is(value)
    raise ArgumentError, "value must be one of #{VALID.join(',')}" unless VALID.include? value
    [self,value]
  end
end

a = [Range, Fixnum.is :optional, String.is :rest_arg] #=> [Range, [Fixnum, :optional], [String, :rest_arg]]

Serabe

class Module
  VALID=[:optional, :rest_arg]
  VALID.each do |x|
    define_method x do
      [self, x]
    end
  end
end
 
a = [Range, Fixnum.optional, String.rest_arg] #=> [Range, [Fixnum, :optional], [String, :rest_arg]]

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Output:
Hello from Ruby
JRuby rocks!
Serabe rocks!

Serabe

require 'rbconfig'
require 'java'
require '../../tool/signature'

class MyRubyClass
  def helloWorld
    puts "Hello from Ruby"
  end

  def goodbyeWorld(a,b="JRuby")

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public class MyObjectTest3 {
  public static void main(String[] args) {
    MyObject obj = new MyObject();
    obj.helloWorld();
    obj.goodbyeWorld(" rocks!");
    obj.goodbyeWorld(" rocks!", "Serabe");
  }
}

Serabe

Compiled from "MyObject.java.rb"
public class MyObject extends org.jruby.RubyObject{
    static {};
    public MyObject();
    public void helloWorld();
    public void goodbyeWorld(java.lang.String);
    public void goodbyeWorld(java.lang.String, java.lang.String);
}

Serabe

serabe@Sylar:~/Programming/projects/ruby2java$ jruby src/compiler2.rb CloneableObject RubyClass examples/interface_example.rb 
serabe@Sylar:~/Programming/projects/ruby2java$ javap CloneableObject
Compiled from "examples.interface_example.rb"
public class CloneableObject extends org.jruby.RubyObject implements java.lang.Cloneable{
    static {};
    public CloneableObject();
}

Serabe

serabe@Sylar:~/Programming/projects/ruby2java$ javap -c org.jruby.ruby2java.PackageClass
Compiled from "examples.package_example.rb"
public class org.jruby.ruby2java.PackageClass extends org.jruby.RubyObject{
static {};
  Code:
   0:	invokestatic	#13; //Method org/jruby/Ruby.getGlobalRuntime:()Lorg/jruby/Ruby;
   3:	invokevirtual	#17; //Method org/jruby/Ruby.getLoadService:()Lorg/jruby/runtime/load/LoadService;
   6:	ldc	#18; //String examples/package_example.rb
   8:	invokevirtual	#24; //Method org/jruby/runtime/load/LoadService.require:(Ljava/lang/String;)Z
   11:	return