Diff of Java8

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• Go to Java8.

[[Java]]

- Stream API ([[Java/Stream]])

- Java8時代の文字列連結まとめ 
--  http://d.hatena.ne.jp/nowokay/touch/20140409#1397010846


- Immutable
--  http://www.asahi-net.or.jp/~DP8T-ASM/java/tips/Immutable.html ([http://www.awm.jp/~yoya/cache/www.asahi-net.or.jp/~dp8t-asm/java/tips/Immutable.html cache])