From: "Mauricio Fernández" <batsman.geo@...>
Date: 2003-08-14T02:50:38+09:00
Subject: Re: Java/Ruby communication

On Thu, Aug 14, 2003 at 02:23:50AM +0900, Hal E. Fulton wrote:
> ----- Original Message ----- 
> From: "Brian McCallister" <mccallister@forthillcompany.com>
> To: "ruby-talk ML" <ruby-talk@ruby-lang.org>
> Sent: Wednesday, August 13, 2003 12:07 PM
> Subject: Re: Java/Ruby communication
> 
> 
> > ruby opens TCPServer
> > Java opens TCPSocket
> > 
> > Java says "hello\r\n"
> > ruby says "hiya\r\n"
> > 
> > Voila, communication. Anything else is just protocol ;-) 
> 
> Fine... now let's see you write a Ruby program
> that instantiates a Java object and invokes a 
> method on it...

batsman@tux-chan:~/src/rjni$ irb --simple-prompt
/home/batsman/usr/lib/ruby/1.8/irb/context.rb:180: warning: method redefined; discarding old use_readline=
>> require 'rjni/reflect'
=> true
>> include RJNI
=> Object
>> jvm = JVM.new # init jvm
=> #<RJNI::JVM:0x407f6e58>
>> JString = Reflect["java.lang.String"]
=> #<RJNI::Reflect::Class:0x407f46f8 @getMethodsID=getMethods, @field_container=java.lang.String, @vm=#<RJNI::JVM:0x407f6e58>, @getConstructorsID=getConstructors, @handle=java.lang.String>
>> o = JString.new "String Passed From Ruby"; nil
=> nil
>> o.startsWith("String").to_b
=> true
>> o.startsWith("Sds").to_b
=> false

startsWith is public boolean java.lang.String.startsWith(java.lang.String).

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