[B! Java8] justoneplanetã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

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Java8ã«é–¢ã™ã‚‹justoneplanetã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (5)

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Android: ç¾åœ¨æ™‚åˆ»ã‚’å›ºå®šã™ã‚‹ãƒ†ã‚¹ãƒˆã¨TestRule
Fixed current time. æ™‚é–“ã«ä¾å˜ã—ãŸAPIã®æŒ¯ã‚‹èˆžã„ã‚’ãƒ†ã‚¹ãƒˆã™ã‚‹å ´åˆ, ç¾åœ¨æ™‚åˆ»ã‚’å›ºå®šã™ã‚Œã°ãƒ†ã‚¹ãƒˆã‚’Repeatableã«ä¿ã¦ã¾ã™. ç¾åœ¨æ™‚åˆ»ã‚’å›ºå®šã™ã‚‹æ¬¡ã®2é€šã‚Šã®æ–¹æ³•ã‚’å®Ÿè£…ã—ã¾ã—ãŸ. java.timeã‚’ä½¿ã£ãŸæ–¹æ³•ï¼ˆJava8ä»¥é™ï¼‰ java.utilã‚’ä½¿ã£ãŸæ–¹æ³•ï¼ˆJava7ä»¥å‰ï¼‰ ãƒ†ã‚¹ãƒˆã®éš›ã«ç¾åœ¨æ™‚åˆ»ã‚’å›ºå®šåŒ–ã™ã‚‹ä¸‹æº–å‚™ã¨ã—ã¦, ç¾åœ¨æ™‚åˆ»ã‚’è¿”ã™APIã‚’ãƒ©ãƒƒãƒ—ã—ãŸãƒ¡ã‚½ãƒƒãƒ‰ã‚’ç”¨æ„ã—ã¾ã™. public static long now() { return <ç¾åœ¨æ™‚åˆ»ã‚’è¿”ã™API> } ãƒ†ã‚¹ãƒˆã®éš›ã«ã¯å›ºå®šæ™‚åˆ»ã‚’è¿”ã™ã‚ˆã†ã«æŒ¯ã‚‹èˆžã„ã‚’å¤‰æ›´ã—ã¦ã‚„ã‚Œã°, ã“ã®APIã«ä¾å˜ã—ã¦ã„ã‚‹ãƒ¢ã‚¸ãƒ¥ãƒ¼ãƒ«ã‹ã‚‰ã™ã‚‹ã¨ã‚ãŸã‹ã‚‚ç¾åœ¨æ™‚åˆ»ãŒå›ºå®šåŒ–ã•ã‚Œã¦ã„ã‚‹ã‚ˆã†ã«è¦‹ãˆã¾ã™. ç›®çš„é”æˆã®ãŸã‚ã«ã¯, now()ãƒ¡ã‚½ãƒƒãƒ‰ãŒå¸¸ã«ãƒ€ãƒŸãƒ¼ã®epoch timeã‚’è¿”ã™ã‚ˆã†ã«æŒ¯ã‚‹èˆžã„ã‚’å·®ã—æ›¿ãˆã‚‹ä»•çµ„ã¿ã‚’ç”¨æ„ã™ã‚‹å¿…è¦ãŒã‚ã‚Šã¾ã™
justoneplanet 2016/04/08
android

TIME

Java8
ãƒªãƒ³ã‚¯
LL ã‹ã‚‰ Java ã«ç§»è¡Œã—ãŸäººãŒã¯ã¾ã‚ŠãŒã¡ãªã“ã¨ - tokuhirom's blog
ã“ã‚“ã«ã¡ã¯ï½¡Java åˆå¿ƒè€…ã§ã™ï½¡ Java åˆå¿ƒè€…ï½¤å¾—ã« LL ã‹ã‚‰ Java ã«æ¥ãŸäººã«ã‚ã‚ŠãŒã¡ãªå•é¡Œã«ã¤ã„ã¦ç¤¾å†…å‘ã‘ã«æ›¸ã„ãŸã‚‚ã®ã‚’ã‚ªãƒ¼ãƒ—ãƒ³ã‚¢ãƒ³ãƒ‰ã‚·ã‚§ã‚¢ã•ã›ã¦ã„ãŸã ãã¾ã™ï½¡ å‰æã¨ã—ã¦ï½¤æˆ‘ã€…ã¯ Java 8 ã§ã‚¬ãƒ³ã‚¬ãƒ³æ”»ã‚ã¦ã„ã‚‹ã¨ã„ã†ã“ã¨ã‚’ã”æ‰¿çŸ¥ãŠããã ã•ã„ï½¡ ã¾ãŸï½¤è‡ªåˆ†ãŒã“ã®æ•°ãƒ¶æœˆã§ï½¢ã†ã‚ãƒ¼ï½¡ã“ã†ã—ã¨ãã¹ãã ã£ãŸã®ã‹ãƒ¼ï½£ã¨æ°—ã¥ã„ãŸã‚„ã¤ã‚’ãƒ‰ãƒ¤é¡”ã§èªžã£ã¦ã„ã‚‹ã¨ã„ã†ã“ã¨ã«ã‚‚ã”æ³¨æ„ãã ã•ã„ï½¡ ã€è¿½è¨˜ã€‘ å¯¾è±¡ã¯ä¸è¦æ¨¡ B2C ã®å ´åˆã§ã™(ä¸è¦æ¨¡ã¨ã„ã†ã®ã¯ facebook ã‚ˆã‚Šå°ã•ã„ã¨ã„ã†ç¨‹åº¦ã®æ„å‘³ã§ã™) ä¾‹å¤–ã‚’æ¡ã‚Šã¤ã¶ã•ãªã„ã‚ˆã†ã«ã—ã‚ˆã† Eclipse ãŒç”Ÿæˆã™ã‚‹ä»¥ä¸‹ã®ã‚ˆã†ãªã‚³ãƒ¼ãƒ‰ã‚’ãã®ã¾ã¾æ®‹ã—ã¦ã„ã‚‹ã‚±ãƒ¼ã‚¹ï½¡ ã“ã‚Œã¯è¨€ã†ã¾ã§ã‚‚ãªãè‰¯ããªã„ã§ã™ãï½¡ãƒ‡ãƒãƒƒã‚°ãŒå›°é›£ã«ãªã‚Šã¾ã™ï½¡ try { } catch (IOException e) { e.printStackTrace(); } Perl
justoneplanet 2014/10/15
java

ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°

programming

java8

Eclipse
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Java8ã®lambdaæ§‹æ–‡ãŒã©ã®ã‚ˆã†ã«ã‚¯ãƒãƒ¼ã‚¸ãƒ£ãƒ¼ã§ã¯ãªã„ã‹ - ãã—ã ã®Hatena
Java8ã«lambdaæ§‹æ–‡ãŒå…¥ã‚Šã¾ã—ãŸãŒã€ã“ã‚Œã¯ã‚¯ãƒãƒ¼ã‚¸ãƒ£ãƒ¼ã§ã¯ãªã„ã€ã¨ã•ã‚Œã¦ã„ã¾ã™ã€‚ ã§ã¯ã€ã©ã®ã‚ˆã†ã«ã€Œã‚¯ãƒãƒ¼ã‚¸ãƒ£ãƒ¼ã§ã¯ãªã„ã€ã®ã‹ã€ã¡ã‚‡ã£ã¨è¦‹ã¦ã¿ã¾ã™ã€‚ ã¾ãšã€lambdaã‚’è¿”ã™ãƒ¡ã‚½ãƒƒãƒ‰ã‚’å®šç¾©ã—ã¾ã™ã€‚ public static Supplier<String> createMessenger(String name, String address){ return () -> { return String.format("ç§ã¯%sã€%sã«ä½ã‚“ã§ã‚‹", name, address); }; } å‘¼ã³å‡ºã™ã¨ã€ã“ã‚“ãªæ„Ÿã˜ã§Supplierã‚’å—ã‘å–ã‚Šã¾ã™ã€‚ Supplier<String> messenger = createMessenger("ãã—ã ", "ãµããŠã‹"); ã“ã®Supplierã‚’å®Ÿè¡Œã™ã‚‹ã¨ã€æ¬¡ã®ã‚ˆã†ã«ãªã‚Šã¾ã™ã€‚ System.out.println(messenger.
justoneplanet 2014/03/19
java8

closure

lambda
ãƒªãƒ³ã‚¯
ãƒ©ãƒ ãƒ€å¼ã€JARè„±ç„ã€JavaScript/Node.jsã«æŽ¥è¿‘ã™ã‚‹JDK 8ã€ãã—ã¦9ã¸
ãƒ©ãƒ ãƒ€å¼ã€JARè„±ç„ã€JavaScript/Node.jsã«æŽ¥è¿‘ã™ã‚‹JDK 8ã€ãã—ã¦9ã¸ï¼šJavaOne Tokyo 2012ã¾ã¨ã‚ãƒ¬ãƒãƒ¼ãƒˆï¼ˆå¾Œç·¨ï¼‰ï¼ˆ1/3 ãƒšãƒ¼ã‚¸ï¼‰ Lambdaã€Jigsawã€Nashornã¨ã¯ 4æœˆ4æ—¥ã¨5æ—¥ã®2æ—¥é–“ã«æ¸¡ã£ã¦é–‹å‚¬ã•ã‚ŒãŸæ—¥æœ¬ã‚ªãƒ©ã‚¯ãƒ«ä¸»å‚¬ã®Java æŠ€è¡“è€…å‘ã‘ã‚¤ãƒ™ãƒ³ãƒˆã€ŒJavaOne Tokyo 2012ã€ã§ã¯ã€å…¨å›½ã‹ã‚‰Javaé–‹ç™ºè€…ãŒé›†ã¾ã‚Šã€Javaå‘¨è¾ºã®æœ€æ–°å‹•å‘ã‚„æŠ€è¡“çš„ãªTipsã€æ´»ç”¨äº‹ä¾‹ãªã©ã®è©±é¡Œã«ç››ã‚Šä¸ŠãŒã£ãŸã€‚ ãƒ¬ãƒãƒ¼ãƒˆã®å‰ç·¨ã§ã¯ã€Java SE/EE/MEãã‚Œãžã‚Œã®ç¾çŠ¶ã¨ä»Šå¾Œã®å‹•å‘ã«ç„¦ç‚¹ã‚’å½“ã¦ã¦ç´¹ä»‹ã—ãŸã€‚å¾Œç·¨ã¯ã€Java SE/JDKã«ã¤ã„ã¦ã€ã€ŒProject Lambdaã€ã€ŒProject Jigsawã€ã€ãã—ã¦æ–°ã—ã„JavaScriptã‚¨ãƒ³ã‚¸ãƒ³ã§ã‚ã‚‹ã€ŒNashornã€ã«é–¢ã™ã‚‹ã‚»ãƒƒã‚·ãƒ§ãƒ³ã®æ§˜åã‚’ãƒ¬ãƒãƒ¼ãƒˆã™ã‚‹ã€‚ ã€ŒProject Lambdaã€ã®
justoneplanet 2012/04/20
java

java8

è¨€èªž
ãƒªãƒ³ã‚¯
Java 8ã€Java 9ã¯ã©ã†ãªã‚‹ã®ã‹ã€‚JavaOneã®åŸºèª¿è¬›æ¼”ã§ç¤ºã•ã‚ŒãŸæ–¹å‘æ€§ã€‚JavaOne 2011
Java 8ã€Java 9ã¯ã©ã†ãªã‚‹ã®ã‹ã€‚JavaOneã®åŸºèª¿è¬›æ¼”ã§ç¤ºã•ã‚ŒãŸæ–¹å‘æ€§ã€‚JavaOne 2011 7æœˆã«ç™»å ´ã—ãŸã€ŒJava 7ã€ã«ç¶šããƒãƒ¼ã‚¸ãƒ§ãƒ³ã¨ã—ã¦é–‹ç™ºä¸ã®ã€ŒJava 8ã€ã€ŒJava 9ã€ã€‚ ã‚ªãƒ©ã‚¯ãƒ« Java Platformãƒãƒ¼ãƒ•ã‚¢ãƒ¼ã‚ãƒ†ã‚¯ãƒˆ Mark Reinholdæ°ã¯ã€ã‚µãƒ³ãƒ•ãƒ©ãƒ³ã‚·ã‚¹ã‚³ã§å…ˆé€±ã€10æœˆ4æ—¥ã‹ã‚‰é–‹å‚¬ã•ã‚ŒãŸã€ŒJaveOne 2011ã€ã®åŸºèª¿è¬›æ¼”ã§ã€ã€ŒJava 8ã€ã®æ©Ÿèƒ½ã¨ã—ã¦äºˆå®šã•ã‚Œã¦ã„ã‚‹ã€ãƒžãƒ«ãƒã‚³ã‚¢ãƒ—ãƒã‚»ãƒƒã‚µã¸ã®å¯¾å¿œã‚’ç›®çš„ã¨ã—ãŸã€ŒProject Lambdaã€ã€å¤§è¦æ¨¡ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã¸ã®å¯¾å¿œã‚’ç›®æŒ‡ã™ã€ŒProject Jigsawã€ã®ç´¹ä»‹ã‚’è¡Œã„ã¾ã—ãŸã€‚ ã•ã‚‰ã«ã€ŒJava 9ã€ã®æ§‹æƒ³ã¨ã—ã¦ãƒ“ãƒƒã‚°ãƒ‡ãƒ¼ã‚¿ã€ãƒžãƒ«ãƒãƒ†ãƒŠãƒ³ãƒˆå¯¾å¿œãªã©ãŒã‚ã‚‹ã“ã¨ã‚’æ˜Žã‚‰ã‹ã«ã—ã¾ã—ãŸã€‚ æœ¬è¨˜äº‹ã¯ã€Œã€ŒJava 7ã€ã¨ã¯ã©ã‚“ãªãƒªãƒªãƒ¼ã‚¹ã ã£ãŸã®ã‹ã€ãƒãƒ¼ãƒ•ã‚¢ãƒ¼ã‚ãƒ†ã‚¯ãƒˆãŒè§£èª¬ã€‚JavaOne 2011
justoneplanet 2011/10/12
Java8

Java9
ãƒªãƒ³ã‚¯
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