Java Streamサンプル(Hishidama's Java8 Stream Example)Streamを変æ›ã™ã‚‹ä¾‹ Streamã‚’Listã«å¤‰æ›ã™ã‚‹ã«ã¯Collectors.toList()を使ã†ã®ãŒå¸¸å¥—手段ã ãŒã€forEachã§æ›¸ãã¨ä»¥ä¸‹ã®ã‚ˆã†ã«ãªã‚‹ã€‚ import java.util.ArrayList; import java.util.List; import java.util.stream.Stream; Stream<String> stream = Stream.of("abc", "def"); // List<String> list = stream.collect(Collectors.toList()); List<String> list = new ArrayList<>(); stream.forEach(t -> list.add(t)); System.out.println(list); →collectメソッドã®å¼•æ•°ã‚’自作ã—ã¦Listã¸å¤‰
forã‚„ifã§æ›¸ãアレをStream APIã§æ›¸ã - è¡Œãã‚ãŸã‚Šã°ã£ãŸã‚Šã‚¨ãƒ³ã‚¸ãƒ‹ã‚¢ã®æ—¥è¨˜
Java 8ã¯ãƒ©ãƒ ダå¼ã§ã“ã“ã¾ã§å¤‰ã‚ã‚‹
Stream APIã®ä¸»ãªãƒ¡ã‚½ãƒƒãƒ‰ã¨å‡¦ç†çµæžœã®Optionalクラスã®ä½¿ã„æ–¹
Java8ã®ãƒ©ãƒ ãƒ€å¼ - mfumiã®æ—¥è¨˜
Java8関数型インターフェース ãƒãƒ¼ãƒˆã‚·ãƒ¼ãƒˆ - Qiita
{{#tags}}- {{label}}
{{/tags}}