{"id":698,"date":"2013-04-14T04:58:23","date_gmt":"2013-04-13T19:58:23","guid":{"rendered":"http:\/\/yucchi.jp\/blog\/?p=698"},"modified":"2013-04-25T05:10:46","modified_gmt":"2013-04-24T20:10:46","slug":"%e3%82%82%e3%81%a3%e3%81%a8-lambda","status":"publish","type":"post","link":"http:\/\/yucchi.jp\/blog\/?p=698","title":{"rendered":"\u3082\u3063\u3068 Lambda"},"content":{"rendered":"<p>Java8 \u306e\u6ce8\u76ee\u306e\u65b0\u6a5f\u80fd\u306e Lambda \u306b\u3064\u3044\u3066\u306a\u3093\u3067\u3082\u3044\u3044\u304b\u3089\u60c5\u5831\u3092\u62fe\u3044\u96c6\u3081\u3066\u52d5\u304b\u3057\u3066\u307f\u308b\u3053\u3068\u3092\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u4eca\u56de\u306f Predicate \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3068 Consumer \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3067\u3059\u3002<\/p>\n<p>\u3053\u306e\u60c5\u5831\u6e90\u3082\u82f1\u8a9e\u306a\u306e\u3067\u8a73\u3057\u304f\u8aad\u3080\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u3002<\/p>\n<p>\u30b3\u30fc\u30c9\u3088\u308a\u3060\u3044\u305f\u3044\u306e\u3053\u3068\u3092\u7406\u89e3\u3067\u304d\u308c\u3070\u3068\u601d\u3044\u3001\u53c2\u8003\u306b\u3055\u305b\u3066\u3082\u3089\u3063\u3066\u307b\u307c\u4e38\u5199\u3057\u306e\u30b5\u30f3\u30d7\u30eb\u3092\u4f5c\u308a\u307e\u3057\u305f\u3002(^_^;<\/p>\n<p>\u975e\u5e38\u306b\u30b7\u30f3\u30d7\u30eb\u306a\u306e\u3067\u7279\u306b\u8aac\u660e\u306e\u5fc5\u8981\u306f\u306a\u3044\u3068\u601d\u3044\u307e\u3059\u304c JavaDoc \u306e\u5185\u5bb9\u3092\u4e00\u90e8\u30b3\u30e1\u30f3\u30c8\u3068\u3057\u3066\u8a18\u8f09\u3057\u3066\u304a\u304d\u307e\u3057\u305f\u3002<\/p>\n<style type=\"text\/css\"><!--\ntable {color: #000000; background-color: #e9e8e2; font-family: \u3086\u305f\u307d\u3093\uff08\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\uff09}\n--><\/style>\n<table width=\"100%\">\n<tbody>\n<tr>\n<td align=\"left\">jp\\yucchi\\preidcate_consumer\\Person.java<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<pre>package jp.yucchi.preidcate_consumer;\r\n\r\nimport java.time.LocalDate;\r\nimport java.time.Period;\r\n\r\npublic class Person {\r\n    public enum Sex {\r\n\r\n        MALE, FEMALE\r\n    }\r\n\r\n    String SAN_OR_CHAN = \"\u305f\u3093\";\r\n\r\n    String firstName;\r\n    String lastName;\r\n    LocalDate birthday;\r\n    Sex gender;\r\n\r\n    public Person(String firstName, String lastName, LocalDate birthday, Sex gender) {\r\n        this.firstName = firstName;\r\n        this.lastName = lastName;\r\n        this.birthday = birthday;\r\n        this.gender = gender;\r\n    }\r\n\r\n    public String getFirstName() {\r\n        return firstName;\r\n    }\r\n\r\n    public String getLastName() {\r\n        return lastName + SAN_OR_CHAN ;\r\n    }\r\n\r\n    public Sex getGender() {\r\n        return gender;\r\n    }\r\n\r\n    public int getAge() {\r\n        return Period.between(birthday, LocalDate.now()).getYears();\r\n    }\r\n\r\n    void printPerson() {\r\n        System.out.println(firstName + \" \" + lastName +  SAN_OR_CHAN + \", \" + this.getAge() + \"\u6b73\" + \", Gender: \"\r\n                + this.getGender());\r\n    }\r\n}<\/pre>\n<table width=\"100%\">\n<tbody>\n<tr>\n<td align=\"left\">jp\\yucchi\\preidcate_consumer\\Preidcate_Consumer.java<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<pre>package jp.yucchi.preidcate_consumer;\r\n\r\nimport java.time.LocalDate;\r\nimport java.util.function.Consumer;\r\nimport java.util.function.Predicate;\r\n\r\npublic class Preidcate_Consumer {\r\n\r\n    public static void main(String[] args) {\r\n\r\n        Person kyouko = new Person(\"\u6df1\u7530\", \"\u606d\u5b50\", LocalDate.of(1982, 11, 2), Person.Sex.FEMALE);\r\n        Person saki = new Person(\"\u6b66\u4e95\", \"\u54b2\", LocalDate.of(1993, 12, 25), Person.Sex.FEMALE);\r\n\r\n        System.out.println(\"\\n&lt;-- Person \u8868\u793a --&gt;\");\r\n        kyouko.printPerson();\r\n        saki.printPerson();\r\n\r\n        System.out.println(\"\\n&lt;-- \u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u5f8c\u306ePerson \u8868\u793a --&gt;\");\r\n        kyouko = updateInfo(kyouko,\r\n                \/\/ Lambda expression for Predicate interface\r\n                person -&gt; person.getAge() &gt; 20,\r\n                \/\/ Lambda expression for Consumer inerface\r\n                person -&gt; person.SAN_OR_CHAN = \"\u3055\u3093\");\r\n\r\n        kyouko.printPerson();\r\n\r\n        saki = updateInfo(saki,\r\n                \/\/ Lambda expression for Predicate interface\r\n                person -&gt; person.getAge() &lt; 20,\r\n                \/\/ Lambda expression for Consumer inerface\r\n                person -&gt; person.SAN_OR_CHAN = \"\u3061\u3083\u3093\");\r\n        saki.printPerson();\r\n    }\r\n\r\n    public static Person updateInfo(Person person,\r\n            Predicate predicate,\r\n            Consumer consumer) {\r\n\r\n        \/\/ java.util.function.Predicate\r\n        if (predicate.test(person)) { \/\/ Returns true if the input object matches some criteria.\r\n            \/\/ java.util.function.Consumer\r\n            consumer.accept(person); \/\/ Accept an input value.\r\n\r\n        }\r\n        return person;\r\n    }\r\n}<\/pre>\n<p>\u307e\u305a\u3001Person \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4e8c\u3064\u4f5c\u3063\u3066\u305d\u306e\u5185\u5bb9\u3092\u8868\u793a\u3055\u305b\u307e\u3059\u3002<\/p>\n<p>\u6b21\u306b Predicate \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306e test() \u30e1\u30bd\u30c3\u30c9\u3067\u5e74\u9f62\u6761\u4ef6\u306e\u5224\u5b9a\u3092\u3057\u3001<\/p>\n<p>Consumer \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306e accept() \u30e1\u30bd\u30c3\u30c9\u3067 Person \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u30c7\u30fc\u30bf\u3092\u64cd\u4f5c\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u305d\u308c\u305e\u308c\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3055\u308c\u305f\u5185\u5bb9\u3067\u8868\u793a\u3055\u305b\u3066\u307e\u3059\u3002<\/p>\n<p>\u5b9f\u884c\u7d50\u679c\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>&lt;&#8211; Person \u8868\u793a &#8211;&gt;<br \/>\n\u6df1\u7530 \u606d\u5b50\u305f\u3093, 30\u6b73, Gender: FEMALE<br \/>\n\u6b66\u4e95 \u54b2\u305f\u3093, 19\u6b73, Gender: FEMALE<\/p>\n<p>&lt;&#8211; \u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u5f8c\u306ePerson \u8868\u793a &#8211;&gt;<br \/>\n\u6df1\u7530 \u606d\u5b50\u3055\u3093, 30\u6b73, Gender: FEMALE<br \/>\n\u6b66\u4e95 \u54b2\u3061\u3083\u3093, 19\u6b73, Gender: FEMALE<\/p>\n<p>\u201d\u305f\u3093\u201d\u304b\u3089\u201d\u3055\u3093\u201d\u3082\u3057\u304f\u306f\u201d\u3061\u3083\u3093\u201d\u306b\u5909\u66f4\u3055\u308c\u3066\u307e\u3059\u306d\u3002(^_^)<\/p>\n<p>\u305f\u3068\u3048\u3070 Preidcate_Consumer.java \u306e 29 \u884c\u76ee\u304c 16 \u6b73\u3088\u308a\u82e5\u3044\u6761\u4ef6\u3060\u3063\u305f\u3089\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>&lt;&#8211; Person \u8868\u793a &#8211;&gt;<br \/>\n\u6df1\u7530 \u606d\u5b50\u305f\u3093, 30\u6b73, Gender: FEMALE<br \/>\n\u6b66\u4e95 \u54b2\u305f\u3093, 19\u6b73, Gender: FEMALE<\/p>\n<p>&lt;&#8211; \u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u5f8c\u306ePerson \u8868\u793a &#8211;&gt;<br \/>\n\u6df1\u7530 \u606d\u5b50\u3055\u3093, 30\u6b73, Gender: FEMALE<br \/>\n\u6b66\u4e95 \u54b2\u305f\u3093, 19\u6b73, Gender: FEMALE<\/p>\n<p>Predicate \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306e test() \u30e1\u30bd\u30c3\u30c9\u3067\u5e74\u9f62\u6761\u4ef6\u306e\u5224\u5b9a\u7d50\u679c\u304c false \u306b\u306a\u308b\u306e\u3067<\/p>\n<p>Consumer \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306e accept() \u30e1\u30bd\u30c3\u30c9\u304c\u5b9f\u884c\u3055\u308c\u306a\u3044\u306e\u3067\u5143\u306e\u307e\u307e\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u305d\u308c\u3067\u306f\u304a\u7d04\u3067\u3059\u3002<\/p>\n<p>\u3053\u306e\u300c\u3082\u3063\u3068 Lambda \u300d\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u3067\u5f97\u305f\u60c5\u5831\u3092\u5143\u306b\u305d\u308c\u3092\u5c11\u3057\u5909\u66f4\u3057\u3066\u3044\u308b\u3060\u3051\u3067\u3059\u3002<\/p>\n<p>\u60b2\u3057\u3044\u3053\u3068\u306b\u305d\u306e\u60c5\u5831\u6e90\u306f\u82f1\u8a9e\u306a\u306e\u3067\u8a73\u3057\u3044\u5185\u5bb9\u306f\u308f\u304b\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u3088\u3063\u3066\u79c1\u306e\u63a8\u6e2c\u3067\u89e3\u91c8\u3055\u308c\u305f\u5185\u5bb9\u3068\u306a\u3063\u3066\u307e\u3059\u306e\u3067\u9593\u9055\u3044\u304c\u3042\u308b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<p>Java8 \u3082\u307e\u3060 build85 \u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u306e\u3067 API \u306e\u5909\u66f4\u306b\u3088\u308a\u8a18\u8ff0\u65b9\u6cd5\u304c\u5909\u308f\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n<p>\u65e9\u304f\u6b63\u5f0f\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u3066\u65e5\u672c\u8a9e\u3067\u3053\u306e\u8d85\u4fbf\u5229\u3067\u7d20\u6575\u306a\u65b0\u6a5f\u80fd\u3092\u52c9\u5f37\u3057\u305f\u3044\u4eca\u65e5\u3053\u306e\u9803\u3067\u3059\u3002<\/p>\n<div class=\"wlWriterEditableSmartContent\" id=\"scid:0767317B-992E-4b12-91E0-4F059A8CECA8:a2fcd878-7907-412a-a687-eceeb5044a2f\" style=\"margin: 0px; padding: 0px; float: none; display: inline;\">Hatena \u30bf\u30b0: <a href=\"http:\/\/b.hatena.ne.jp\/t\/Java\" rel=\"tag\">Java<\/a><\/div>\n<div class='wp_social_bookmarking_light'>\n            <div class=\"wsbl_hatena\"><a href='\/\/b.hatena.ne.jp\/add?mode=confirm&url=http%3A%2F%2Fyucchi.jp%2Fblog%2F%3Fp%3D698&title=%E3%82%82%E3%81%A3%E3%81%A8%20Lambda' title='\u3053\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u3092\u306f\u3066\u306a\u30d6\u30c3\u30af\u30de\u30fc\u30af\u306b\u8ffd\u52a0' rel=nofollow class='wp_social_bookmarking_light_a' target=_blank><img src='http:\/\/yucchi.jp\/blog\/wp-content\/plugins\/wp-social-bookmarking-light\/public\/images\/hatena.gif' alt='\u3053\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u3092\u306f\u3066\u306a\u30d6\u30c3\u30af\u30de\u30fc\u30af\u306b\u8ffd\u52a0' title='\u3053\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u3092\u306f\u3066\u306a\u30d6\u30c3\u30af\u30de\u30fc\u30af\u306b\u8ffd\u52a0' width='16' height='12' class='wp_social_bookmarking_light_img' \/><\/a><\/div>\n            <div class=\"wsbl_facebook\"><a href='http:\/\/www.facebook.com\/share.php?u=http%3A%2F%2Fyucchi.jp%2Fblog%2F%3Fp%3D698&t=%E3%82%82%E3%81%A3%E3%81%A8%20Lambda' title='Facebook \u306b\u30b7\u30a7\u30a2' rel=nofollow class='wp_social_bookmarking_light_a' target=_blank><img src='http:\/\/yucchi.jp\/blog\/wp-content\/plugins\/wp-social-bookmarking-light\/public\/images\/facebook.png' alt='Facebook \u306b\u30b7\u30a7\u30a2' title='Facebook \u306b\u30b7\u30a7\u30a2' width='16' height='16' class='wp_social_bookmarking_light_img' \/><\/a><\/div>\n            <div class=\"wsbl_google_plus_one\"><g:plusone size=\"medium\" annotation=\"none\" href=\"http:\/\/yucchi.jp\/blog\/?p=698\" ><\/g:plusone><\/div>\n            <div class=\"wsbl_twitter\"><a href=\"https:\/\/twitter.com\/share\" class=\"twitter-share-button\" data-url=\"http:\/\/yucchi.jp\/blog\/?p=698\" data-text=\"\u3082\u3063\u3068 Lambda\" data-lang=\"ja\">Tweet<\/a><\/div>\n    <\/div>\n<br class='wp_social_bookmarking_light_clear' \/>\n","protected":false},"excerpt":{"rendered":"<p>Java8 \u306e\u6ce8\u76ee\u306e\u65b0\u6a5f\u80fd\u306e Lambda \u306b\u3064\u3044\u3066\u306a\u3093\u3067\u3082\u3044\u3044\u304b\u3089\u60c5\u5831\u3092\u62fe\u3044\u96c6\u3081\u3066\u52d5\u304b\u3057\u3066\u307f\u308b\u3053\u3068\u3092\u3057\u3066\u3044\u307e\u3059\u3002 \u4eca\u56de\u306f Predicate \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3068 Consumer \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3067\u3059\u3002 \u3053\u306e\u60c5\u5831\u6e90\u3082\u82f1\u8a9e\u306a\u306e\u3067\u8a73\u3057\u304f\u8aad\u3080\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u3002 \u30b3\u30fc\u30c9\u3088\u308a\u3060\u3044\u305f\u3044\u306e\u3053\u3068\u3092\u7406\u89e3\u3067\u304d\u308c\u3070\u3068\u601d\u3044\u3001\u53c2\u8003\u306b\u3055\u305b\u3066\u3082\u3089\u3063\u3066\u307b\u307c\u4e38\u5199\u3057\u306e\u30b5\u30f3\u30d7\u30eb\u3092\u4f5c\u308a\u307e\u3057\u305f\u3002(^_^; \u975e\u5e38\u306b\u30b7\u30f3\u30d7\u30eb\u306a\u306e\u3067\u7279\u306b\u8aac\u660e\u306e\u5fc5\u8981\u306f\u306a\u3044\u3068\u601d\u3044\u307e\u3059\u304c JavaDoc \u306e\u5185\u5bb9\u3092\u4e00\u90e8\u30b3\u30e1\u30f3\u30c8\u3068\u3057\u3066\u8a18\u8f09\u3057\u3066\u304a\u304d\u307e\u3057\u305f\u3002 jp\\yucchi\\preidcate_consumer\\Person.java package jp.y\u2026<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[17],"class_list":["post-698","post","type-post","status-publish","format-standard","hentry","category-java","tag-java"],"_links":{"self":[{"href":"http:\/\/yucchi.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/698","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/yucchi.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/yucchi.jp\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/yucchi.jp\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/yucchi.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=698"}],"version-history":[{"count":3,"href":"http:\/\/yucchi.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/698\/revisions"}],"predecessor-version":[{"id":778,"href":"http:\/\/yucchi.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/698\/revisions\/778"}],"wp:attachment":[{"href":"http:\/\/yucchi.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=698"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/yucchi.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=698"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/yucchi.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=698"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}