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JRubyの多次元配列をjavaの多次元配列に変換する方法 ref: http://qiita.com/akm/items/40d3f69960d99746d450
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| irb(main):034:0> [[1,2,3]].to_java(Java::byte[]) | |
| => [B[[B@436a4e4b]@f2f2cc1 | |
| irb(main):035:0> [[[1,2,3]]].to_java(Java::byte[][]) | |
| => [[B[[[B@3b2cf7ab]@2aa5fe93 |
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