IndianGuru

JS = Java::java.lang.System

os   = JS.get_property 'os.name'
home = JS.get_property 'java.home'
mem  = Java::java.lang.Runtime.get_runtime.free_memory

puts "Running on #{os}"
puts "Java home is #{home}"
puts "#{mem} bytes available in JVM"

IndianGuru

require 'java'
#java_import 'java.util.Date'
java_import('java.util.Date') { |pkg,name| 'JDate' }
java_import 'java.text.DateFormat'
date = JDate.new
date_format = DateFormat.get_date_instance
date_us = date_format .format date
puts date_us

IndianGuru

import java.util.*;
public class InternationalizationEx
{
  public static void main(String[] args)
  {
    String lang, country;
    Locale cLocale;
    ResourceBundle msg;

    lang = new String("de");

IndianGuru

D:\elasticsearch-0.17.6\bin>elasticsearch.bat
"C:\Program Files\Java\jdk1.6.0_26\bin\java"  -Xms256m -Xmx1g -Xss128k -XX:+UseP
arNewGC -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -XX:SurvivorRatio=
8 -XX:MaxTenuringThreshold=1 -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSIn
itiatingOccupancyOnly -XX:+HeapDumpOnOutOfMemoryError  -Delasticsearch -Des-fore
ground=yes -Des.path.home="D:\elasticsearch-0.17.6" -cp ";.;D:\apache-solr-3.3.0
\dist\apache-solr-solrj-3.3.0.jar;D:\apache-solr-3.3.0\example\work\Jetty_0_0_0_
0_8983_solr.war__solr__k1kf17\webapp\WEB-INF\lib\slf4j-jdk14-1.6.1.jar;D:\apache
-solr-3.3.0\dist\solrj-lib\commons-codec-1.4.jar;D:\apache-solr-3.3.0\dist\solrj
-lib\commons-httpclient-3.1.jar;D:\apache-solr-3.3.0\dist\solrj-lib\commons-io-1

IndianGuru

# 1
class Rubyist
  def self.who
    "Geek"
  end
end
puts Rubyist.who

# 2
class Rubyist

IndianGuru

require "rubygems"
require "bundler/setup"

require "sinatra"

get '/hi' do
    "Hello JRuby World!"
end

IndianGuru

require 'open-uri'
require 'csv'

unless ARGV.length == 1
  puts "Usage: jruby09.rb INTC"  
  exit  
end

url = "http://download.finance.yahoo.com/d/quotes.csv?s=#{ARGV[0]}&f=snl1d1t1c1ohgv&e=.csv"
csv = CSV.parse(open(url).read)

IndianGuru

require "rubygems"
require "bundler/setup"
require 'zip/zip'

# Hard-coding the file names
file = "jruby-complete.jar"
zip  = "zip.zip"
if File.exists?(file)
  #Create a Zip object to put compressed data in
  Zip::ZipFile.open(zip, true) do |zipfile|   

IndianGuru

directory 'vendor'

desc 'Install Ruby gems into vendor/'
task :install_gems => 'vendor' do
  sh 'jruby -S gem install -i vendor rubyzip'
end

IndianGuru

import org.jruby.embed.ScriptingContainer;

public class JavaLauncher {
  public static void main(String[] args) {
    ScriptingContainer container = new ScriptingContainer();
    container.runScriptlet("require 'compress'");
  }
}