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tipsã¨javaã«é–¢ã™ã‚‹yukungã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (167)

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Gradleã§ãƒ—ãƒ©ã‚°ã‚¤ãƒ³ã‚’åˆ©ç”¨ã™ã‚‹æ–¹æ³• - mike-neckã®ãƒ–ãƒã‚°
ä»Šæ›´ãªã‚¿ã‚¤ãƒˆãƒ«ã§ã™ãŒâ€¦ incubatingãªAPIã§ plugins DSLã¨å‘¼ã°ã‚Œã¦ã„ã‚‹æ–¹æ³•ã§ã™ã€‚plugins DSLã¯gradleã®plugin repositoryã«ã‚ã‚‹ãƒ—ãƒ©ã‚°ã‚¤ãƒ³ã‚’id(ã¨ãƒãƒ¼ã‚¸ãƒ§ãƒ³)ã ã‘ã§å¼•ã£å¼µã£ã¦ã“ã‚Œã‚‹ã‚ˆã†ã«ã™ã‚‹æ–¹æ³•ã§ã€gradleã®2.10ãã‚‰ã„ã«ç™»å ´ã—ã¦ã„ã¾ã™ã€‚gradleã«ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆã«æ·»ä»˜ã•ã‚Œã¦ã„ã‚‹ãƒ—ãƒ©ã‚°ã‚¤ãƒ³ã¨gradle ã®plugin repository ã«ã‚ã‚‹ãƒ—ãƒ©ã‚°ã‚¤ãƒ³ä»¥å¤–ã‚’ã“ã®DSLã§æŒ‡å®šã™ã‚‹æ–¹æ³•ã¯ç™»å ´ã—ãŸå½“åˆã¯ãªã‹ã£ãŸã®ã§ã™ãŒã€æœ€è¿‘ã¯settings.gradleã§é ‘å¼µã‚Œã°ã§ãã‚‹ã¨ã„ã†ã“ã¨(ãã—ã¦ã€multipleãªãƒ—ãƒã‚¸ã‚§ã‚¯ãƒˆã«ãªã‚‹ã¨ã™ã”ãä¾¿åˆ©ã«ãªã‚‹ã¨ã„ã†ã“ã¨)ã‚’æ•™ãˆã¦ã‚‚ã‚‰ã£ãŸã®ã§ã€å¿˜ã‚Œã¦ã‚‚ã„ã„ã‚ˆã†ã«ãƒ¡ãƒ¢ã—ã¦ãŠãã¾ã™ã€‚ å®Ÿä¾‹ã¨ã—ã¦JUnit5ã®ãƒ—ãƒ©ã‚°ã‚¤ãƒ³ org.junit.platform.gradle.plugin ã‚’ä½¿ã„ã¾ã™ã€‚ pl
yukung 2017/10/13
development

tips

java

gradle
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Filtering a Stream of Optionals in Java | Baeldung
yukung 2017/09/05
java

java9

java8

tips
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[Jackson]Enumã®å€¤ã‚’èªã¿æ›¸ãã™ã‚‹
yukung 2017/09/01
programming

java

jackson

json

tips
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[Java] OracleJDKã®å–å¾—æ–¹æ³•ãŒå¤§ããå¤‰ã‚ã‚Šã¾ã—ãŸ | DevelopersIO
ã“ã‚“ã«ã¡ã¯ã€‚ã“ã‚€ã‚ï¼ æ±äº¬ã§ã™ã€‚ 2017/05/23ã«æ°—ã¥ã„ãŸã®ã§ã™ãŒã€curlã‚„wgetã§å®Ÿè¡Œã—ã¦ã„ã‚‹OracleJDKã®å–å¾—ã§ã‚¨ãƒ©ãƒ¼ãŒå‡ºã‚‹ã‚ˆã†ã«ãªã£ã¦ã„ã¾ã™ã€‚å…ˆæ—¥(2017/05/22)ã‹ã‚‰Chefã§ã‚‚åŒã˜ã‚ˆã†ãªç¾è±¡ãŒã‚ã‚‹ã“ã¨ã‚’Stackoverflowã§ç¢ºèªã—ã¾ã—ãŸã€‚ ã‚ãŸã—ãŒæ‹…å½“ã—ã¦ã„ã‚‹ãƒ—ãƒã‚¸ã‚§ã‚¯ãƒˆã§ã€GoldenAMIä½œæˆã§ä½¿ç”¨ã—ã¦ã„ã‚‹Ansibleã§OracleJDKã®ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ«ã«å¤±æ•—ã—ãŸãŸã‚ã€åŽŸå› ã‚’èª¿æŸ»ã—ã¦ã„ã¾ã—ãŸã®ã§å…±æœ‰ã—ã¾ã™ã€‚è‡ªå‹•ã‚¹ã‚¯ãƒªãƒ—ãƒˆãªã©ã§OracleJDKã‚’è‡ªå‹•çš„ã«ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ«ã—ã¦ã„ã‚‹æ§‹æˆã‚’å–ã£ã¦ã„ã‚‹æ–¹ã¯é«˜ã„ç¢ºçŽ‡ã§å¤±æ•—ã™ã‚‹ã¨æ€ã‚ã‚Œã‚‹ãŸã‚ã€æ³¨æ„ãŒå¿…è¦ã§ã™ã€‚ Ansibleã®JDKã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ«ã§çªç„¶ã®æ» Ansibleã§OracleJDKã®ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ«ã‚’è¡Œã£ã¦ã„ã¾ã™ã€‚2017/05/23çªç„¶æ»ã—ã¾ã—ãŸã€‚ amazon-ebs: TASK **************
yukung 2017/05/25
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java

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provisioning
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getterã‚„setterä»¥å¤–ã®ãƒ¡ã‚½ãƒƒãƒ‰ã‚’JavaBeansã®ã‚¢ã‚¯ã‚»ãƒƒã‚µã«ã™ã‚‹ - AOEã®æ—¥è¨˜
ãƒãƒƒãƒˆä¸Šã§ã€Java ã¸ã® dis ã¨ã—ã¦ã€Œãªã‚“ã§ Java ã®ãƒ—ãƒãƒ‘ãƒ†ã‚£ã‚¢ã‚¯ã‚»ãƒƒã‚µã¯ã‚ã–ã‚ã– get/set ã§å§‹ã¾ã‚‹åå‰ã®ãƒ¡ã‚½ãƒƒãƒ‰ã«ã—ãªã„ã¨ã„ã‘ãªã„ã‚“ã ï¼ã€ã¨ã„ã†ã®ã‚’ã‚ˆãè¦‹ã‹ã‘ã¾ã™ã€‚ã§ã™ãŒå®Ÿã¯ JavaBeans ã®ä»•æ§˜ã¨ã—ã¦ã¯ã„ã‚ã‚†ã‚‹ getter/setter ã§ãªã„ãƒ¡ã‚½ãƒƒãƒ‰ã‚‚ãƒ—ãƒãƒ‘ãƒ†ã‚£ã®ã‚¢ã‚¯ã‚»ãƒƒã‚µã«ã™ã‚‹ã“ã¨ãŒã§ãã¾ã™ã€‚ä½™ã‚Šã«ã‚‚ JavaBeans ã®ã“ã¨ãŒãƒœãƒã‚¯ã‚½ã«è¨€ã‚ã‚Œã‚‹ã®ã§ã‹ã£ã¨ãªã£ã¦æ›¸ãã¾ã—ãŸw ã¾ãšã¯ä»¥ä¸‹ã® Java ã‚¯ãƒ©ã‚¹ã‚’è¦‹ã¦ãã ã•ã„ã€‚ /** * getter/setterã‚’ä½¿ã‚ãªã„JavaBeansã®ä¾‹. */ public class Test { private String ã‚ãƒ¼ã„; public String ã™ã”ãƒ¼ã„() { return ã‚ãƒ¼ã„; } public void ãŸãƒ¼ã®ã—ãƒ¼(String myProperty) { this.ã‚ãƒ¼ã„ = m
yukung 2017/04/27
programming

java

tips
ãƒªãƒ³ã‚¯
MacOS Sierra ã‚¢ãƒƒãƒ—ã‚°ãƒ¬ãƒ¼ãƒ‰å¾Œã«Javaã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã®èµ·å‹•ãŒãƒŽã‚ãƒŠãƒŸé…ã„ - A Memorandum
ä¾‹ãˆã° H2 database ã‚’ä»¥ä¸‹ã®ã‚ˆã†ã«èµ·å‹•ã™ã‚‹ã¨ã‚ã£ã½ã†é…ã„ java -cp h2.jar org.h2.tools.Server H2 database ã«é™ã‚‰ãšã€Tomcat ã ã£ãŸã‚Š Logback ã ã£ãŸã‚Šã€ã‚ã‚‰ã‚†ã‚‹ã‚‚ã®ãŒé…ã„ ä»¥ä¸‹ã«ã‚ã‚‹ã‚ˆã†ã« InetAddress.getLocalHost() ã‹ã‚‰å‘¼ã°ã‚Œã‚‹ DNS Lookup ã«åŽŸå› ãŒã‚ã‚‹ã‚ˆã†ã plumbr.eu ã“ã“ã¨ã‹ thoeni.io ã“ã“ã¨ã‹ stackoverflow.com ãƒ¯ãƒ¼ã‚¯ã‚¢ãƒ©ã‚¦ãƒ³ãƒ‰ /etc/hosts ã«ãƒ›ã‚¹ãƒˆåã‚’æŒ‡å®š ãƒ›ã‚¹ãƒˆåãŒ MacBook-Pro ã®å ´åˆã¯ä»¥ä¸‹ã®ã‚ˆã†ãªæ„Ÿã˜ 127.0.0.1 localhost MacBook-Pro.local ::1 localhost MacBook-Pro.local ãƒ›ã‚¹ãƒˆåè‡ªä½“ã¯ã€Œã‚·ã‚¹ãƒ†ãƒ ç’°å¢ƒè¨å®šã€ã®ã€Œå…±æœ‰ã€ã«ã‚ã‚‹ã‚³ãƒ³ãƒ”ãƒ¥ãƒ¼ã‚¿åã§è¨å®š
yukung 2017/04/25
java

tips

java8
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Collectors.toMap() ã¯ç¬¬3å¼•æ•°ã‚’æ„è˜ã—ã¦ãã ã•ã„ - A Memorandum
ãƒªã‚¹ãƒˆã‹ã‚‰ãƒžãƒƒãƒ—ã‚’ä½œã‚‹æ™‚ã«ä½¿ã†ä»¥ä¸‹ã®ã‚³ãƒ¼ãƒ‰ Map<String, String> phoneBook = people.stream() .collect(Collectors.toMap(Person::getName, Person::getAddress); ãªã¤ã‹ã—ã„ä»¥ä¸‹ã®ã‚³ãƒ¼ãƒ‰ã¨ã¯æŒ™å‹•ãŒç•°ãªã‚Šã¾ã™ã€‚ Map<String, String> phoneBook = new HashMap<>(); for (Person p : people) { phoneBook.put(p.getName(), p.getAddress()); } Collectors.toMap() ã®å ´åˆã¯ã€ã‚ãƒ¼ ã¤ã¾ã‚Š Person.getName() ã«é‡è¤‡ãŒã‚ã‚‹å ´åˆã¯ IllegalStateException ã«ãªã‚Šã¾ã™ã€‚ æ˜”ãªãŒã‚‰ã® Map ã®æ“ä½œã®å»¶é•·ã§è€ƒãˆã‚‹ã¨ã€æ–°ã—ã„ã‚‚ã®ã§ä¸Šæ›¸ãã•ã‚Œã‚‹ã¨
yukung 2017/04/22
programming

java

java8

tips
ãƒªãƒ³ã‚¯
Arrays.asList() ã¯å˜ãªã‚‹é…åˆ—ã®ãƒ©ãƒƒãƒ‘ã‚’è¿”ã™ã ã‘ãªã®ã§ã€è¦ç´ ã®è¿½åŠ ã‚‚å‰Šé™¤ã‚‚ã§ãã¾ã›ã‚“ - A Memorandum
ã„ã¤ã¾ã§ãŸã£ã¦ã‚‚é–“é•ã„ãŒç„¡ããªã‚Šã¾ã›ã‚“ã€‚ ä»¥ä¸‹ã®ã‚ˆã†ã«Listã®åˆæœŸåŒ–ã§å¤šç”¨ã™ã‚‹Arrays.asList()ã€‚ List<String> stooges = Arrays.asList("Larry", "Moe", "Curly"); Arrays.asList() ãŒè¿”ã™ã‚¤ãƒ³ã‚¹ã‚¿ãƒ³ã‚¹ã¯ã€java.util.Arrays$ArrayList ã§ã‚ã£ã¦ã€java.util.ArrayList ã§ã¯ã‚ã‚Šã¾ã›ã‚“ã€‚ Arrays.asList() ã®å®Ÿè£…ã¯ä»¥ä¸‹ã®ã‚ˆã†ã«ãªã£ã¦ã„ã¾ã™ã€‚ public class Arrays { public static <T> List<T> asList(T... a) { return new ArrayList<>(a); } } åˆ†ã‹ã‚Šã«ãã„ã§ã™ãŒã€ã“ã“ã§ã‚¤ãƒ³ã‚¹ã‚¿ãƒ³ã‚¹åŒ–ã•ã‚Œã‚‹ ArrayList ã¯ Arrays ã®å†…éƒ¨ã‚¯ãƒ©ã‚¹ã§ä»¥ä¸‹ã®ã‚¯ãƒ©ã‚¹ã§ã™ã€‚ pu
yukung 2017/04/18
programming

java

tips
ãƒªãƒ³ã‚¯
Class.newInstance()ã¯Java9ã‹ã‚‰éžæŽ¨å¥¨ã«ãªã‚‹ã®ã§ä»Šã‹ã‚‰æ›¸ãæ–¹ã‚’å¤‰ãˆã¦ãŠã“ã† - Qiita
å‰ç½®ã ã¡ã‚‡ã£ã¨å‰ã«ã“ã‚“ãªãƒ„ã‚£ãƒ¼ãƒˆã‚’è¦‹ã‹ã‘ã¾ã—ãŸã€‚ Java 9 ã‹ã‚‰ java.lang.Class newInstance ãŒ deprecated ã«ãªã‚‹ã®ã‹ã€ã¸ãƒ¼https://t.co/AI28VSqKS8 â€” Kenji Yoshida (@xuwei_k) 2017å¹´3æœˆ14æ—¥ æœ¬å½“ã‹ãªï¼Ÿã¨ç¢ºèªã—ã¦ã¿ã¾ã—ãŸã€‚ ç¢ºèªç’°å¢ƒ Java9 JDK 9 Early Access Releases â€” Project Kenai ã‹ã‚‰æœ€æ–°ç‰ˆã‚’ãƒ€ã‚¦ãƒ³ãƒãƒ¼ãƒ‰ã—ã¾ã—ãŸã€‚ ï¼ˆBuild 161 ã§ç¢ºèªã—ã¾ã—ãŸï¼‰ IDEA eclipseã ã¨Java9ã‚’èªè˜ã—ã¦ãã‚Œãªã‹ã£ãŸã®ã§ã€èªè˜ã—ã¦ãã‚Œã‚‹intellijã‚’ä½¿ç”¨ã—ã¾ã—ãŸã€‚ ãŸã ã—ã€æ³¨æ„ç‚¹ãŒåˆã£ã¦ã€Version: 2016.3.4ã ã¨ãƒ—ãƒã‚°ãƒ©ãƒ ãŒå‹•ãã¾ã›ã‚“ã§ã—ãŸã€‚ ãã®ãŸã‚ã€IntelliJ IDEA: Early Access Program
yukung 2017/03/23
java9

java

tips
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Java8 ã§è¿½åŠ ã•ã‚ŒãŸ Exact ç³»ãƒ¡ã‚½ãƒƒãƒ‰ - A Memorandum
Java8 ã®ç›®ç«‹ãŸãªã„å¤‰æ›´ã¨ã—ã¦ã€Math ã‚¯ãƒ©ã‚¹ã«ã‚ªãƒ¼ãƒãƒ¼ãƒ•ãƒãƒ¼æ™‚ã«ã¯ä¾‹å¤–ã‚’æŠ•ã’ã‚‹Exact (æ£ç¢ºãª) ç³»ãƒ¡ã‚½ãƒƒãƒ‰ãŒè¿½åŠ ã•ã‚ŒãŸã€‚ ã„ãšã‚Œã‚‚ int ã¾ãŸã¯ long ã‚’å¼•æ•°ã«å–ã‚‹ã‚ˆã†ã«ã‚ªãƒ¼ãƒãƒ¼ãƒãƒ¼ãƒ‰ã•ã‚Œã¦ã„ã‚‹ã€‚ ç®—è¡“æ¼”ç®—ã®çµæžœãŒã‚ªãƒ¼ãƒãƒ•ãƒãƒ¼ã™ã‚‹å ´åˆã«ã¯ ArithmeticException ãŒã‚¹ãƒãƒ¼ã•ã‚Œã‚‹ã€‚ åŠ ç®—ã€æ¸›ç®—ã€ä¹—ç®— addExact Integer r = 2_147_483_647 + 1; // -2147483648 Math.addExact(2_147_483_647, 1); // ArithmeticException subtractExact Integer r = -2_147_483_648 - 1; // 2147483647 Math.subtractExact(-2_147_483_647, 1); // ArithmeticException
yukung 2017/02/02
programming

java

tips
ãƒªãƒ³ã‚¯
Maven ã®ãƒ“ãƒ«ãƒ‰ã§ãƒ†ã‚¹ãƒˆã‚’ã‚¹ã‚ãƒƒãƒ—ã™ã‚‹ - tm_senda ã®æŠ€è¡“ãƒŽãƒ¼ãƒˆ
Maven ã‚’åˆ©ç”¨ã™ã‚‹å ´åˆã€ãƒ†ã‚¹ãƒˆã‚’ã‚¹ã‚ãƒƒãƒ—ã™ã‚‹ã®ã¯æœ¬æ¥ã§ã‚ã‚Œã°æŽ¨å¥¨ã•ã‚Œãªã„ã‚ã‘ã§ã™ãŒã€ ãƒ†ã‚¹ãƒˆã«æ™‚é–“ãŒã‹ã‹ã‚Šã™ãŽã‚‹ã®ã§æ™®æ®µã¯ãƒ†ã‚¹ãƒˆã‚’ã‚¹ã‚ãƒƒãƒ—ã—ãŸã„ ã‚¹ã‚±ã‚¸ãƒ¥ãƒ¼ãƒ«ã«è¿½ã‚ã‚Œã¦ãƒ†ã‚¹ãƒˆã‚³ãƒ¼ãƒ‰ã®ãƒ¡ãƒ³ãƒ†ãƒŠãƒ³ã‚¹ãŒè¿½ã„ã¤ã‹ãªã„ï¼ã‘ã©ãƒ“ãƒ«ãƒ‰ã¯é€šã—ãŸã„â€¦*1 ãªã©ã®äº‹æƒ…ã«ã‚ˆã‚Šãƒ†ã‚¹ãƒˆã‚’ã‚¹ã‚ãƒƒãƒ—ã—ãŸã„å ´é¢ã«å‡ºãã‚ã™ã“ã¨ãŒã‚ã‚Šã¾ã™ã€‚ ã¾ã‚Œã«ã€"rm -rf src/test/java" ã¨ã„ã†ãƒ¯ã‚¤ãƒ«ãƒ‰ãªæ‰‹æ³•ã‚‚è¦‹ã‹ã‘ã‚‹ã®ã§ã™ãŒâ€¦ ãƒ†ã‚¹ãƒˆã‚’ã‚¹ã‚ãƒƒãƒ—ã™ã‚‹ã«ã¯â€¦ ãƒ†ã‚¹ãƒˆã®å®Ÿè¡Œã®ã¿ã‚’ã‚¹ã‚ãƒƒãƒ—ã™ã‚‹ mvn install -DskipTests=true ãƒ†ã‚¹ãƒˆã‚³ãƒ¼ãƒ‰ã®ã‚³ãƒ³ãƒ‘ã‚¤ãƒ«ã€ãŠã‚ˆã³ãƒ†ã‚¹ãƒˆã®å®Ÿè¡Œã‚’ã‚¹ã‚ãƒƒãƒ—ã™ã‚‹ mvn install -Dmaven.test.skip=true ãƒ†ã‚¹ãƒˆã‚’ã‚¹ã‚ãƒƒãƒ—ã™ã‚‹ã«ã¯ä¸Šè¨˜ã‚’ä½¿ã„åˆ†ã‘ã¾ã™ã€‚ å¾Œè€…ã®å ´åˆã€jar:test-jar(org.apache.maven.plugins:maven
yukung 2017/01/21
development

java

maven

tips

testing
ãƒªãƒ³ã‚¯
Javaã‚¨ãƒ³ã‚¸ãƒ‹ã‚¢ãŒã‚„ã£ã¦ã—ã¾ã„ãŒã¡ãªScalaãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚° - Qiita
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yukung 2016/09/22
programming

scala

tips

java

tutorial
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How to Migrate Netty 3 to 4 (Netty ç•ªå¤–ç·¨) - Taste of Tech Topics
ã“ã‚“ã«ã¡ã¯ï¼æ–°ã—ã„ç‰©å¥½ããªã‚¨ãƒ³ã‚¸ãƒ‹ã‚¢ã®ãƒ„ã‚«ãƒŽ(@snuffkin)ã§ã™ã€‚ å¼·ã„é¢¨ã‚’å¹ã‹ã›ã¦å°é¢¨ãŒé€šã‚ŠéŽãŽã¾ã—ãŸãŒã€çš†ã•ã‚“ã¯ã„ã‹ãŒãŠéŽã”ã—ã§ã—ã‚‡ã†ã‹ã€‚ ã“ã®ãƒ–ãƒã‚°ã§ç´¹ä»‹ã—ã¦ã„ã‚‹Vert.xã‚‚ãã†ã§ã™ãŒã€Nettyã¯æ§˜ã€…ãªãƒ—ãƒãƒ€ã‚¯ãƒˆã§æŽ¡ç”¨ã•ã‚Œã€è¿½ã„é¢¨ã‚’æ„Ÿã˜ã‚‹çŠ¶æ³ã§ã™ã€‚ã¯ã„ã€ä»Šå›žã¯ä¹…ã—ã¶ã‚Šã®Nettyã§ã™ã€‚ ã“ã‚Œã¾ã§ã®ãŠã•ã‚‰ã„ ã•ã¦ã€ã“ã‚Œã¾ã§ä½•å›žã‹ã«åˆ†ã‘ã¦Nettyã®è©±ã‚’ã—ã¦ãã¾ã—ãŸã€‚ã¾ãšã¯ã€ç°¡å˜ã«æŒ¯ã‚Šè¿”ã£ã¦ã¿ã¾ã—ã‚‡ã†ã€‚ ã‚¤ãƒ™ãƒ³ãƒˆãƒ‰ãƒªãƒ–ãƒ³ã§é€šä¿¡å‡¦ç†ã‚’è¡Œãˆã‚‹Netty å°Žå…¥ç·¨ - Taste of Tech Topics ã‚¤ãƒ™ãƒ³ãƒˆãƒ‰ãƒªãƒ–ãƒ³ã§é€šä¿¡å‡¦ç†ã‚’è¡Œãˆã‚‹Netty å°Žå…¥ç·¨2 - Taste of Tech Topics ã‚¤ãƒ™ãƒ³ãƒˆãƒ‰ãƒªãƒ–ãƒ³ã§é€šä¿¡å‡¦ç†ã‚’è¡Œãˆã‚‹Netty å°Žå…¥ç·¨3 - Taste of Tech Topics ã‚ªãƒªã‚¸ãƒŠãƒ«ã®é€šä¿¡ãƒ—ãƒãƒˆã‚³ãƒ«ã‚’å®Ÿè£…ã—ã¦ã¿ã‚ˆã†(Netty å®Ÿè·µç·¨1) - Ta
yukung 2016/06/10
programming

development

java

framework

netty

tips
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OkHttpã‚’ä½¿ã£ã¦HTTP/2ã§é€šä¿¡ã™ã‚‹ + ãŠã¾ã‘
ã“ã®è¨˜äº‹ã¯ã€Java Advent Calendar 2015 ã® 18 æ—¥ç›®ã®è¨˜äº‹ã§ã™ã€‚ æ˜¨æ—¥ã¯ @mdstoy ã•ã‚“ã® ã§ã€çµå±€ Optional ã®ã‚¤ãƒ³ã‚¹ã‚¿ãƒ³ã‚¹ã«å¯¾ã—ã¦ ifNotPresent çš„ãªã“ã¨ã‚’ã‚„ã‚ŠãŸã„ã¨ãã¯ã©ã†ã—ãŸã‚‰ã„ã„ã‚“ã§ã™ã‹ï¼Ÿ ã§ã—ãŸã€‚ æ˜Žæ—¥ã¯ @maaya8585 ã•ã‚“ã§ã™ã€‚ ã¿ãªã•ã‚“ã¯Web APIã®å‘¼ã³å‡ºã—ã¯ã©ã®ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã‚’ä½¿ã£ã¦ã¾ã™ã‹ï¼Ÿ Apache HttpComponents JAX-RS Client Jersey Client jetty-client OkHttp Retrofit Feign è‡ªä½œãƒ©ã‚¤ãƒ–ãƒ©ãƒª ãªã©ãªã©ã€è‰²ã‚“ãªé¸æŠžè‚¢ãŒã‚ã‚Šã¾ã™ã‚ˆãã€‚ (Retrofitã¯å†…éƒ¨ã§OkHttpãŒä½¿ã‚ã‚Œã¦ã„ã‚‹ã¿ãŸã„ã ã—ã€Feignã‚‚Clientã¨ã—ã¦OkHttpã‚’ä½¿ã†äº‹ãŒå‡ºæ¥ã‚‹ã¿ãŸã„ã§ã™) åƒ•ã¯ã“ã“æ•°å¹´Jersey Clientã‚’ä½¿ã£ã¦ã¦ç‰¹ã«ä¸æº€ã¯ãªã‹ã£ãŸ
yukung 2016/06/04
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OkHttpã‚’è©¦ã™ - CLOVERðŸ€
Javaã§ã®HTTPã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆã‚’ä½¿ã†æ™‚ã€æœ€è¿‘ã¯JAX-RS Cientã«æµã‚Œã¦ã„ãŸã®ã§ã™ãŒæ¨™æº–ã§ã¯ã¾ã ã‚„ã‚Œãªã„ã“ã¨ãŒã‚ã£ãŸã‚Šã™ã‚‹ã“ã¨ãŒã‚ã‹ã‚Šã€ã¡ã‚‡ã£ã¨æ°—ã«ãªã£ã¦ã„ãŸOkHttpã‚‚è§¦ã£ã¦ã¿ã‚‹ã“ã¨ã«ã—ã¾ã—ãŸã€‚ OkHttp å€‹äººçš„ã«æ›¸ã„ã¦ã„ãŸã€ä»¥ä¸‹ã®ã‚·ãƒªãƒ¼ã‚ºã®ç¶šãçš„ãªæ„Ÿã˜ã§ã‚„ã£ã¦ã¿ã¾ã™ã€‚ Javaã§ã®HttpClientã‚µãƒ³ãƒ—ãƒ« - CLOVER Javaã§ã®HttpClientã‚µãƒ³ãƒ—ãƒ« ãã®2 - CLOVER OkHttpã‚’ä½¿ã„ã¤ã¤ã€ä¸Šè¨˜ã®ã‚¨ãƒ³ãƒˆãƒªã¨ã»ã¼åŒã˜ã‚ˆã†ã« ç°¡å˜ãªGETï¼POSTã‚’è¡Œã† HTTPã‚¹ãƒ†ãƒ¼ã‚¿ã‚¹ã‚³ãƒ¼ãƒ‰ãŒ200ã‹ã©ã†ã‹åˆ¤å®šã™ã‚‹ ãƒ¬ã‚¹ãƒãƒ³ã‚¹ã¯JUnitï¼AssertJã§æ¤œè¨¼ã™ã‚‹ ã¨ã„ã£ãŸæµã‚Œã§ã‚„ã£ã¦ã„ããŸã„ã¨æ€ã„ã¾ã™ã€‚ æº–å‚™ Mavenä¾å˜é–¢ä¿‚ã€‚ <dependency> <groupId>com.squareup.okhttp3</groupId> <artifactId
yukung 2016/06/04
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Java8 é€†å¼•ã Stream API - Qiita
##ã¯ã˜ã‚ã« Java8ã®æ–°æ©Ÿèƒ½ã€Stream APIã‚’ä½¿ã„å§‹ã‚ã¦ã‚³ãƒ¼ãƒ‡ã‚£ãƒ³ã‚°ãŒæ ¼æ®µã«æ¥½ã«ãªã‚Šã¾ã—ãŸã€‚ å‚™å¿˜éŒ²çš„ã«ã‚µãƒ³ãƒ—ãƒ«ã‚³ãƒ¼ãƒ‰ã‚’æ›¸ãå‡ºã—ã¦ã¿ã¾ã—ãŸã€‚å°‘ã—ãšã¤è¿½åŠ ã—ã¦ã„ãäºˆå®šã§ã™ã€‚ Javaã¯ä½¿ã£ãŸã“ã¨ã‚ã‚‹ã‘ã©ãƒ©ãƒ ãƒ€å¼ã‚„Stream APIã¯ã‚ˆãçŸ¥ã‚‰ãªã„ã¨ã„ã†æ–¹ã¯ã€å‚è€ƒã«ã—ã¦ã¿ã¦ãã ã•ã„ã€‚ ãƒãƒªãƒãƒªä½¿ã£ã¦ã„ã‚‹æ–¹ã¯ã€ã“ã‚“ãªä½¿ã„æ–¹ã‚‚ã‚ã‚‹ã‚ˆï¼ã¨æ•™ãˆã¦ã„ãŸã ã‘ã‚‹ã¨å¬‰ã—ã„ã§ã™ã€‚ ã¡ãªã¿ã«ã‚ªãƒ©ã‚¤ãƒªãƒ¼ç¤¾ã®Javaã«ã‚ˆã‚‹é–¢æ•°åž‹ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚° â€•Java 8ãƒ©ãƒ ãƒ€å¼ã¨StreamãŒã¨ã¦ã‚‚å‚è€ƒã«ãªã‚Šã¾ã—ãŸã€‚ ã€å‰ææ¡ä»¶ã€‘Stream APIã®èª¬æ˜Žã«ä½¿ç”¨ã™ã‚‹ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆ public class Person { private String name; private int age; private List<Person> children; public Person(String name){/*..
yukung 2016/06/02
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Java8 ã® Stream å–å¾—æ–¹æ³•ã‚ã‚Œã“ã‚Œ - A Memorandum
Iterator ã‹ã‚‰ Stream ã‚’å¾—ã‚‹ é…åˆ—ã‹ã‚‰ Stream ã‚’å¾—ã‚‹ Enumeration ã‹ã‚‰ Stream ã‚’å¾—ã‚‹ æ–‡å—åˆ—ã‚’ split ã—ãŸçµæžœã‹ã‚‰ Stream ã‚’å¾—ã‚‹ ä¹±æ•° Stream ã‚’å¾—ã‚‹ æ•°åˆ—ã®ç„¡é™ Stream ã‚’å¾—ã‚‹ org.w3c.dom.NodeList ã‹ã‚‰Streamã‚’å¾—ã‚‹ ã‚½ãƒ¼ãƒˆæ¸ˆã¿ã® Stream ã‚’å¾—ã‚‹ Iterator ã‹ã‚‰ Stream ã‚’å¾—ã‚‹ Iterable ã«å¤‰æ›ã—ã¦ã‹ã‚‰ Stream ã‚’å¾—ã‚‹ã“ã¨ãŒã§ãã¾ã™ã€‚ Iterator<String> sourceIterator = Arrays.asList("A", "B", "C").iterator(); Iterable<String> iterable = () -> sourceIterator; Stream<String> targetStream = StreamSupp
yukung 2016/06/02
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AssertJ ä½¿ã„æ–¹ãƒ¡ãƒ¢ - Qiita
org.junit.ComparisonFailure: expected:<"[H]oge"> but was:<"[h]oge"> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at sample.assertj.MainTest.test(MainTest.java:10) ï¼ˆä»¥ä¸‹ç•¥ï¼‰ èª¬æ˜Ž
yukung 2016/06/02
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Javaã§ã®HttpClientã‚µãƒ³ãƒ—ãƒ« ãã®2 - CLOVERðŸ€
ã“ã¡ã‚‰ã®ã‚¨ãƒ³ãƒˆãƒªã®ã€ç¶šç·¨çš„ãªã‚„ã¤ã§ã™ã€‚ Javaã§ã®HttpClientã‚µãƒ³ãƒ—ãƒ« http://d.hatena.ne.jp/Kazuhira/20131026/1382796711 ã“ã‚Œã‚’æ›¸ã„ãŸå¾Œã«ã€ã„ãã¤ã‹æ°—ã«ãªã‚‹HTTPã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆãƒ©ã‚¤ãƒ–ãƒ©ãƒªã‚’è¦‹ã¦ã¯ã„ãŸã®ã§ã™ãŒã€ãšã£ã¨è§¦ã‚‰ãªã„ã¾ã¾ã ã£ãŸã®ã§ã“ã‚Œã‚’æ©Ÿã«ã¨æ€ã„ã¾ã—ã¦ã€‚ ã“ã¡ã‚‰ã®ã‚¨ãƒ³ãƒˆãƒªã«ã€è§¦ç™ºã•ã‚ŒãŸã¨ã„ã†ã®ã‚‚ã‚ã‚Šã¾ã™ã€‚ google-http-java-client å…¥é–€ http://vividcode.hatena blog.com/entry/java/google-http-java-client ã›ã£ã‹ããªã®ã§ã€google-http-java-clientå«ã‚ã¦è©¦ã—ã¦ã„ã£ã¦ã¿ã¾ã™ã€‚ ãªãŠã€ã‚µãƒ³ãƒ—ãƒ«ã¨ã—ã¦ã¯å‰å›žåŒæ§˜ ã‚µãƒ³ãƒ—ãƒ«ã¨ã—ã¦ã¯ã€ ç°¡å˜ãªGETï¼POSTã‚’è¡Œã† HTTPã‚¹ãƒ†ãƒ¼ã‚¿ã‚¹ã‚³ãƒ¼ãƒ‰ãŒ200ã‹ã©ã†ã‹åˆ¤å®šã™ã‚‹ ãƒ¬ã‚¹ãƒãƒ³ã‚¹ã‚’ã‚³
yukung 2016/06/01
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try-with-resourcesã§ãƒªã‚½ãƒ¼ã‚¹è§£æ”¾ã•ã‚Œãªã„ãƒ‘ã‚¿ãƒ¼ãƒ³ - Qiita
public class Test { public static void main(String[] args) { File file = new File("out.txt"); try (PrintWriter pw = new PrintWriterWrapper( new BufferedWriterWrapper( new FileWriterWrapper(file)));) { System.out.println("func"); } catch (Exception e) { System.out.println("catch:" + e); } finally { System.out.println("finally"); } } // ä»¥ä¸‹ã€ãƒã‚°ã‚’è¿½åŠ ã—ãŸãƒ©ãƒƒãƒ‘ãƒ¼ã‚¯ãƒ©ã‚¹ public static class PrintWriterWrapper extend
yukung 2016/05/29
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