{"id":332,"date":"2005-03-30T01:00:00","date_gmt":"2005-03-29T16:00:00","guid":{"rendered":"https:\/\/ecoop.net\/memo\/2005-03-30-1.html"},"modified":"2005-03-30T01:00:00","modified_gmt":"2005-03-29T16:00:00","slug":"2005-03-30-1","status":"publish","type":"post","link":"https:\/\/www.ecoop.net\/memo\/archives\/2005-03-30-1.html","title":{"rendered":"static \u30d5\u30a1\u30af\u30c8\u30ea\u30e1\u30bd\u30c3\u30c9\u306e\u843d\u3068\u3057\u7a74"},"content":{"rendered":"<p>\nEffective Java \u3088\u308a\u3001static \u30d5\u30a1\u30af\u30c8\u30ea\u30e1\u30bd\u30c3\u30c9\u3067 Foo.getInstance() \u307f\u305f\u304f\u3059\u308b\u306e\u304c\u3044\u3044\u3001\u3068\u3042\u3063\u305f\u304c\u3001\u4f55\u3082\u8003\u3048\u305a\u3084\u3063\u3066\u308b\u3068\u7d99\u627f\u5468\u308a\u3067\u6df7\u4e71\u3092\u62db\u304f\u3002\n<\/p>\n<blockquote><p>class Parent {<br \/>\n\tpublic static Parent getInstance(){ return new Parent(); }<br \/>\n}<br \/>\nclass Child extends Parent {}\n<\/p><\/blockquote>\n<p>\u3053\u306e\u3068\u304d\u3001Child.getInstance(); \u306f Child \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067\u306f\u306a\u304f(\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u3067\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b getInstance() \u3092\u4f7f\u3046\u305f\u3081) Parent \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3057\u3066\u3057\u307e\u3046\u3002<br \/>\n&nbsp;<br \/>\nEffective Java \u306e\u4f8b\u306b\u304d\u3063\u3061\u308a\u66f8\u304b\u308c\u3066\u3044\u308b\u3068\u304a\u308a\u3001\n<\/p>\n<blockquote><p>class Parent {<br \/>\n\tprivate Parent(){ }<br \/>\n\tpublic static Parent getInstance(){ return new Parent(); }<br \/>\n}\n<\/p><\/blockquote>\n<p>\u3068\u304b class final Parent \u3068\u304b\u3057\u3066\u7d99\u627f\u3092\u7981\u6b62\u3059\u308b\u306e\u304c\u59a5\u5f53\u306a\u89e3\u6c7a\u65b9\u6cd5(\u62e1\u5f35\u306b\u306f\u30b3\u30f3\u30dd\u30b8\u30b7\u30e7\u30f3\u3092\u4f7f\u3046)\u3002<br \/>\n\u305d\u308c\u304c\u5acc\u306a\u3089 static \u30d5\u30a1\u30af\u30c8\u30ea\u30e1\u30bd\u30c3\u30c9\u306e\u516c\u958b\u3092\u3084\u3081\u3066\u666e\u901a\u306b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u516c\u958b\u3059\u308b\u3002<br \/>\n&nbsp;<br \/>\n\u3042\u308b\u3044\u306f\u3001\u7d99\u627f\u3092\u884c\u3046\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304c\u3001\u78ba\u5b9f\u306b public static Child getInstance() \u3092\u5b9a\u7fa9\u3057\u3066\u304f\u308c\u308b\u3053\u3068\u3092\u4fe1\u3058\u308b\u304b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Effective Java \u3088\u308a\u3001static \u30d5\u30a1\u30af\u30c8\u30ea\u30e1\u30bd\u30c3\u30c9\u3067 Foo.getInstance() \u307f\u305f\u304f\u3059\u308b\u306e\u304c\u3044\u3044\u3001\u3068\u3042\u3063\u305f\u304c\u3001\u4f55\u3082\u8003\u3048\u305a\u3084\u3063\u3066\u308b\u3068\u7d99\u627f\u5468\u308a\u3067\u6df7\u4e71\u3092\u62db\u304f\u3002 class Parent { pub &hellip; <a href=\"https:\/\/www.ecoop.net\/memo\/archives\/2005-03-30-1.html\" class=\"more-link\">\u7d9a\u304d\u3092\u8aad\u3080 <span class=\"screen-reader-text\">static \u30d5\u30a1\u30af\u30c8\u30ea\u30e1\u30bd\u30c3\u30c9\u306e\u843d\u3068\u3057\u7a74<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[42],"class_list":["post-332","post","type-post","status-publish","format-standard","hentry","tag-java"],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/posts\/332","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/comments?post=332"}],"version-history":[{"count":0,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/posts\/332\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/media?parent=332"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/categories?post=332"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ecoop.net\/memo\/wp-json\/wp\/v2\/tags?post=332"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}