Pops up a little window programmatically.

alert

#!/usr/bin/env jruby
#
# Pops up a little alert window.
#

require 'java'

JFrame = javax.swing.JFrame
JPanel = javax.swing.JPanel
JLabel = javax.swing.JLabel

def main(argv)
  msg = argv.join ' '
  f = JFrame.new
  p = JPanel.new
  p.add JLabel.new msg
  f.getContentPane.add p
  f.setDefaultCloseOperation JFrame::EXIT_ON_CLOSE
  f.setLocationRelativeTo nil
  f.pack
  f.setVisible true
  f.toFront
end

main ARGV