« Return to Thread: What is the current syntax for defining a class in JRuby that implements a Java interface?

Re: What is the current syntax for defining a class in JRuby that implements a Java interface?

by Bill Dortch :: Rate this Message:

You can also subclass and implement one or more interfaces at the same time, e.g.

# you probably wouldn't combine these particular
# interfaces, just an example

class MyFrame < javax.swing.JFrame
include java.awt.event.ActionListener
include java.lang.Runnable

def initialize(*args)
    super
    @button = new javax.swing.JButton 'Click me'
    add @button
    @button.add_action_listener self
   #..etc
end

def actionPerformed(event)
#...
end

def run
#...
end

end

You can also group interfaces that you frequently use together:

module RunCompare
include java.lang.Runnable
include java.lang.Comparable
end

class AClass
include RunCompare

def run
#...
end

def compareTo(other)
#..
end
end

-Bill

On 8/15/07, Peter K Chan <peter@...> wrote:

Ken,
        The new way is to use "include" to include the Java interface, as if
it is a Ruby module.

        For example:

Class RunnableRuby
  include java.lang.Runnable

  def run
    puts :Running
  end
end

Peter

-----Original Message-----
From: Kenneth McDonald [mailto:kenneth.m.mcdonald@...]
Sent: Wednesday, August 15, 2007 11:57 PM
To: user@...
Subject: [jruby-user] What is the current syntax for defining a class in
JRuby that implements a Java interface?

I've seen an 'old' way to do it, but suspect there is something more
modern. Is there a page anywhere that gives quick examples of how to do
Java-specific stuff in JRuby?

Thanks,
Ken

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« Return to Thread: What is the current syntax for defining a class in JRuby that implements a Java interface?