def initialize_system_extensions
require 'java'
require 'readline'
if JRUBY_VERSION =~ /^1.7/
java_import 'jline.console.ConsoleReader'
input = @input && @input.to_inputstream
output = @output && @output.to_outputstream
@java_console = ConsoleReader.new(input, output)
@java_console.set_history_enabled(false)
@java_console.set_bell_enabled(true)
@java_console.set_pagination_enabled(false)
@java_terminal = @java_console.getTerminal
elsif JRUBY_VERSION =~ /^1.6/
java_import 'java.io.OutputStreamWriter'
java_import 'java.nio.channels.Channels'
java_import 'jline.ConsoleReader'
java_import 'jline.Terminal'
@java_input = Channels.newInputStream(@input.to_channel)
@java_output = OutputStreamWriter.new(Channels.newOutputStream(@output.to_channel))
@java_terminal = Terminal.getTerminal
@java_console = ConsoleReader.new(@java_input, @java_output)
@java_console.setUseHistory(false)
@java_console.setBellEnabled(true)
@java_console.setUsePagination(false)
end
end