JRuby tryout result

README.md

JRuby tryout result

• JRuby jruby-9.0.0.0.pre1
• Java -- Java(TM) SE Runtime Environment (build 1.8.0-b132)

On each change in .java file

• javac Inter.java
• jar cf Inter.jar Inter.class

Output

 $ jruby inter.rb
123
1234

Inter.java

//package cz.codeland.gunlicensetester.util;

import java.util.ArrayList;
import java.util.Arrays;

public class Inter
{
  private ArrayList<Integer> array;

  public Inter(Integer... integers)
  {
    array = new ArrayList<>(Arrays.asList(integers));
  }

  @Override
  public String toString()
  {
    StringBuilder result = new StringBuilder(array.size());

    for(Integer integer : array) {
      result.append(integer);
    }

    return result.toString();
  }

  public Boolean add(Integer number) {
    return array.add(number);
  }
}

inter.rb

# Ruby stuff
require 'pp'

require 'java'
require 'inter.jar'

module OwnJavaClasses
  import 'Inter'
end

inter = OwnJavaClasses::Inter.new 1,2,3

puts inter.to_s

inter.add 4

puts inter.to_s

output

123
1234