{"id":6945,"date":"2013-02-28T23:13:27","date_gmt":"2013-02-28T14:13:27","guid":{"rendered":"http:\/\/arison.jp\/blog\/?p=6945"},"modified":"2016-03-30T12:02:26","modified_gmt":"2016-03-30T03:02:26","slug":"java-stringbuilder","status":"publish","type":"post","link":"https:\/\/arison.jp\/blog\/2013\/02\/28\/java-stringbuilder\/","title":{"rendered":"Java\u306e\u6587\u5b57\u5217\u64cd\u4f5c\uff08StringBuilder\uff09"},"content":{"rendered":"<p>Java StringBuilder<\/p>\n<p>Java\u306e\u6587\u5b57\u5217\u64cd\u4f5c<\/p>\n<p>Java1.4\u4ee5\u524d\u306f\u3001String\u540c\u58eb\u306e\u6587\u5b57\u5217\u7d50\u5408\u306f\u3001PG\u30ec\u30d3\u30e5\u30fc\u6642\u306b\u53e9\u304b\u308c\u308b\u7b46\u982d\u3067\u3057\u305f\u3002<br \/>\n<span class=\"font24px\">\u300cStringBuffer\u3092\u4f7f\u3048\u300d<\/span>\u3068\u3002<\/p>\n<p>Java5\u3067\u306f\u3001StringBuilder\u304c\u8ffd\u52a0\u3055\u308c\u307e\u3057\u305f\u3002<br \/>\n\u305d\u308c\u304b\u3089\u3001PG\u30ec\u30d3\u30e5\u30fc\u6642\u306b\u306f\u3001\u3053\u3046\u3044\u3046\u98a8\u306b\u8a00\u3046\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<br \/>\n<span class=\"font24px\">\u300c\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u306e\u8003\u616e\u304c\u4e0d\u8981\u306a\u3089\u3001StringBuilder\u3092\u4f7f\u3048\u300d<\/span>\u3068\u3002<\/p>\n<p><!--more--><\/p>\n<p>\u81ea\u5206\u3082PG\u30ec\u30d3\u30e5\u30fc\u3055\u308c\u308b\u5074\u304b\u3089\u3059\u308b\u5074\u306b\u306a\u3063\u305f\u3093\u3060\u306a\u3042\u3068\u304b\u601d\u3044\u306a\u304c\u3089\u2026\u3002<br \/>\n\u3082\u3061\u308d\u3093\u3001\u4eca\u3067\u3082PG\u30ec\u30d3\u30e5\u30fc\u3055\u308c\u308b\u5074\u3067\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>StringBuffer vs StringBuilder<br \/>\n\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5 vs \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9<\/p>\n<p>StringBuilder \u30af\u30e9\u30b9\u306f Java5(Tiger)\u3067\u5c0e\u5165\u3055\u308c\u305f\u30af\u30e9\u30b9\u3002<br \/>\n\u6a5f\u80fd\u306f StringBuffer \u30af\u30e9\u30b9\u3068\u307e\u3063\u305f\u304f\u540c\u3058\u3002<\/p>\n<p>StringBuffer \u30af\u30e9\u30b9\u306e\u3059\u3079\u3066\u306e\u30e1\u30bd\u30c3\u30c9\u306f synchronized \u306b\u306a\u3063\u3066\u304a\u308a\u3001\u540c\u671f\u5316\u3055\u308c\u3066\u3044\u308b\u3002<br \/>\n\u3053\u306e\u305f\u3081\u3001\u8907\u6570\u306e\u30b9\u30ec\u30c3\u30c9\u304b\u3089\u4f7f\u7528\u3055\u308c\u308b\u5834\u5408\u3067\u3082\u3001\u5b89\u5168\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n<p>StringBuilder \u30af\u30e9\u30b9\u306fStringBuffer \u30af\u30e9\u30b9\u304b\u3089synchronized \u304c\u306f\u305a\u3055\u308c\u305f\u3060\u3051\u3002<\/p>\n<p>\u8907\u6570\u306e\u30b9\u30ec\u30c3\u30c9\u304b\u3089\u6587\u5b57\u5217\u64cd\u4f5c\u3092\u884c\u3046\u306e\u3067\u3042\u308c\u3070 StringBuffer \u30af\u30e9\u30b9\u3002<br \/>\n\u5358\u4e00\u30b9\u30ec\u30c3\u30c9\u3067\u3042\u308c\u3070 StringBuilder \u30af\u30e9\u30b9\u3068\u3044\u3046\u4f7f\u3044\u5206\u3051\u3092\u304a\u3053\u306a\u3046\u3088\u3046\u306b\u3059\u308c\u3070 OK \u3067\u3059\u3002<\/p>\n<p>append(String str) \u30e1\u30bd\u30c3\u30c9\u306f\u3001J2SE 1.4.2 \u306e StringBuffer#append(String str) \u30e1\u30bd\u30c3\u30c9\u306e<br \/>\nnull \u306e\u6642\u306e\u51e6\u7406\u306a\u3069\u5c11\u3057\u3060\u3051\u9055\u3046\u3002<\/p>\n<p>\u3010\u53c2\u8003\u30b5\u30a4\u30c8\u3011<br \/>\nJ2SE 5.0 Tiger \u864e\u306e\u7a74 StringBuilder<br \/>\nhttp:\/\/www.javainthebox.net\/laboratory\/J2SE1.5\/TinyTips\/StringBuilder\/StringBuilder.html<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java StringBuilder Java\u306e\u6587\u5b57\u5217\u64cd\u4f5c Java1.4\u4ee5\u524d\u306f\u3001String\u540c\u58eb\u306e\u6587\u5b57\u5217\u7d50\u5408\u306f\u3001PG\u30ec\u30d3\u30e5\u30fc\u6642\u306b\u53e9\u304b\u308c\u308b\u7b46\u982d\u3067\u3057\u305f\u3002 \u300cStringBuffer\u3092\u4f7f\u3048\u300d\u3068\u3002 Java5\u3067\u306f\u3001String [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":17178,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,4],"tags":[703],"class_list":["post-6945","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-programming","category-diary","tag-java"],"_links":{"self":[{"href":"https:\/\/arison.jp\/blog\/wp-json\/wp\/v2\/posts\/6945","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/arison.jp\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/arison.jp\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/arison.jp\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/arison.jp\/blog\/wp-json\/wp\/v2\/comments?post=6945"}],"version-history":[{"count":0,"href":"https:\/\/arison.jp\/blog\/wp-json\/wp\/v2\/posts\/6945\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/arison.jp\/blog\/wp-json\/wp\/v2\/media\/17178"}],"wp:attachment":[{"href":"https:\/\/arison.jp\/blog\/wp-json\/wp\/v2\/media?parent=6945"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/arison.jp\/blog\/wp-json\/wp\/v2\/categories?post=6945"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/arison.jp\/blog\/wp-json\/wp\/v2\/tags?post=6945"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}