Convert String array to byte[][] in JRuby

gistfile1.rb

tsbegin = Time.gm(2012, 8, 10)
tsend = Time.gm(2012, 10, 30)
tsadd = 3600 * 6

splits = Array.new

while tsbegin < tsend do
  splits << tsbegin.strftime("%Y%m%d%H%M").to_java_bytes
  tsbegin += tsadd
end

splitkeys = Java::byte[][splits.size].new
for i in 0 .. splits.size - 1 do
  splitkeys[i] = splits[i]
end