# File metrics_utils.rb, line 124
    def metrics
      @distribution.clear
      File.foreach(@ckjm_file_name) do |line|
        line.chomp!
        if line =~ /^\S+(\s+\d+){8}\s*$/
          class_name, *metrics_vals = line.split(/\s+/)
          METRICS.each_index do |i|
            value = metrics_vals[i].to_i
            (@distribution[METRICS[i][0]] ||= Hash.new(0))[value] += 1
          end
        end
      end
      @distribution
    end