CoffeeScript --> JS --> Rhino

importPackage java.awt

f = new Frame "Не пиши на Java"
b = new Button "Во имя добра"
b.addActionListener java.awt.event.ActionListener new
  class
    actionPerformed: (e) ->
      java.lang.System.exit 0
f.setLayout new FlowLayout()
f.add b
f.pack()
f.setVisible true