# File lib/systemu.rb, line 287
    def systemu
      split_argv = JRuby::PathHelper.smart_split_command @argv
      process = java.lang.Runtime.runtime.exec split_argv.to_java(:string)

      stdout, stderr = [process.input_stream, process.error_stream].map do |stream|
        StreamReader.new(stream)
      end

      field = process.get_class.get_declared_field("pid")
      field.set_accessible(true)
      pid = field.get(process)
      thread = new_thread pid, @block if @block
      exit_code = process.wait_for
      [
        RubyProcess::RubyStatus.new_process_status(JRuby.runtime, exit_code, pid),
        stdout.join,
        stderr.join
      ]
    end