{"id":3245,"date":"2022-02-04T21:30:56","date_gmt":"2022-02-04T12:30:56","guid":{"rendered":"https:\/\/www.bold.ne.jp\/engineer-club\/?p=3245"},"modified":"2025-11-19T10:05:56","modified_gmt":"2025-11-19T01:05:56","slug":"java-length","status":"publish","type":"post","link":"https:\/\/www.bold.ne.jp\/engineer-club\/java-length","title":{"rendered":"Java\u306elength\u3068\u306f\uff1f\u6587\u5b57\u5217\u3084\u914d\u5217\u306e\u9577\u3055\u3092\u53d6\u5f97\u3059\u308blength\u306e\u4f7f\u3044\u65b9"},"content":{"rendered":"<p>\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u300c\u914d\u5217\u306e\u9577\u3055\u300d\u3084\u300c\u6587\u5b57\u5217\u306e\u9577\u3055\u300d\u3068\u3044\u3063\u305f\u8868\u73fe\u3067\u6570\u3092\u8868\u3059\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u3057\u3066\u3053\u308c\u3089\u300c\u9577\u3055\u300d\u3092\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u4e2d\u3067\u5229\u7528\u3059\u308b\u3053\u3068\u3082\u591a\u3044\u3067\u3059\u3002\u4eca\u56de\u306f<span>Java<\/span>\u306e\u300c\u9577\u3055\u300d\uff1d<span>length<\/span>\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u3066\u3044\u304d\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<div id=\"toc_container\" class=\"no_bullets\"><p class=\"toc_title\">\u76ee\u6b21<\/p><ul class=\"toc_list\"><li><a href=\"#Javalengthlength\">\uff11\uff0eJava\u306elength\u3068length()<\/a><\/li><li><a href=\"#Javalength\">\uff12\uff0e\u3010Java\u3011length\u306f\u914d\u5217\u306e\u8981\u7d20\u6570\u3092\u53d6\u5f97\u3059\u308b<\/a><ul><li><a href=\"#-length\">\uff12-\uff11\uff0elength\u306e\u4f7f\u3044\u65b9<\/a><\/li><li><a href=\"#-length-2\">\uff12-\uff12\uff0e\u4e8c\u6b21\u5143\u914d\u5217\u3067length\u3092\u4f7f\u3046<\/a><\/li><li><a href=\"#-Forlength\">\uff12-\uff13\uff0eFor\u6587\u3067length\u3092\u4f7f\u3046\u3068\u4fbf\u5229<\/a><\/li><\/ul><\/li><li><a href=\"#Javalength-2\">\uff13\uff0e\u3010Java\u3011length()\u306f\u6587\u5b57\u5217\u306e\u6587\u5b57\u6570\u3092\u53d6\u5f97\u3059\u308b<\/a><ul><li><a href=\"#-length-3\">\uff13-\uff11\uff0elength()\u306e\u4f7f\u3044\u65b9<\/a><\/li><li><a href=\"#-length-4\">\uff13-\uff12\uff0e\u914d\u5217\u3067length()\u3092\u4f7f\u3046<\/a><\/li><\/ul><\/li><li><a href=\"#i\">\uff14\uff0e\u307e\u3068\u3081<\/a><\/li><\/ul><\/div>\n<h2><span id=\"Javalengthlength\">\uff11\uff0eJava\u306elength\u3068length()<\/span><\/h2>\n<p>Java\u306b\u306f<span>2<\/span>\u3064\u306e<span>length<\/span>\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3072\u3068\u3064\u306f\u914d\u5217\u306e\u9577\u3055\uff08\u8981\u7d20\u6570\uff09\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306e\u300c<span>length<\/span>\u300d\u3001\u3082\u3046\u3072\u3068\u3064\u306f\u6587\u5b57\u5217\u306e\u9577\u3055\uff08\u6587\u5b57\u6570\uff09\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306e\u300c<span>length()<\/span>\u300d\u3067\u3059\u3002<\/p>\n<p>2\u3064\u306e\u9055\u3044\u306f\u3001\u898b\u305f\u76ee\u3067\u306f<span>()<\/span>\u304c\u3064\u304f\u304b\u5426\u304b\u3067\u3059\u3002\u305d\u308c\u305e\u308c\u306e\u610f\u5473\u5408\u3044\u306e\u9055\u3044\u3068\u3057\u3066\u306f\u3001<strong>\u914d\u5217\u306e\u9577\u3055\u3092\u53d6\u5f97\u3059\u308blength\u306f\u914d\u5217\u304c\u6301\u3064\u30d5\u30a3\u30fc\u30eb\u30c9\u3067<\/strong>\u3001<strong>length()\u306fString\u578b\u3067\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u30e1\u30bd\u30c3\u30c9\u3067\u3042\u308b<\/strong>\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002<\/p>\n<table style=\"border-collapse: collapse; width: 100%;\">\n<tbody>\n<tr>\n<td style=\"width: 18.1533%;\"><strong>\u540d\u524d<\/strong><\/td>\n<td style=\"width: 20.0314%;\"><strong>\u7a2e\u985e<\/strong><\/td>\n<td style=\"width: 61.8152%;\"><strong>\u7528\u9014<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 18.1533%;\">length<\/td>\n<td style=\"width: 20.0314%;\">\u30d5\u30a3\u30fc\u30eb\u30c9<\/td>\n<td style=\"width: 61.8152%;\">\u914d\u5217\u306e\u8981\u7d20\u6570\u3092\u6301\u3064<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 18.1533%;\">length()<\/td>\n<td style=\"width: 20.0314%;\">\u30e1\u30bd\u30c3\u30c9<\/td>\n<td style=\"width: 61.8152%;\">String\u30af\u30e9\u30b9\u3067\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u3002\u6587\u5b57\u5217\u306e\u6587\u5b57\u6570\u3092<span>int<\/span>\u578b\u3067\u8fd4\u3059<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><span id=\"Javalength\">\uff12\uff0e\u3010Java\u3011length\u306f\u914d\u5217\u306e\u8981\u7d20\u6570\u3092\u53d6\u5f97\u3059\u308b<\/span><\/h2>\n<h3><span id=\"-length\">\uff12-\uff11\uff0elength\u306e\u4f7f\u3044\u65b9<\/span><\/h3>\n<p>\u307e\u305a\u306f\u914d\u5217\u306e\u8981\u7d20\u6570\u3092\u53d6\u308a\u51fa\u3059<span>length<\/span>\u306e\u4f7f\u3044\u65b9\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">String strs[] = {\"\u3072\u3068\u3064\", \"\u3075\u305f\u3064\", \"\u307f\u3063\u3064\", \"\u3088\u3063\u3064\"};\r\nSystem.out.println(strs.length);\r\n<\/pre>\n<p>\u3053\u308c\u3092\u5b9f\u884c\u3057\u305f\u7d50\u679c\u306f\u4ee5\u4e0b\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<blockquote>\n<p>&#8212;<br \/>\n4<\/p>\n<p>&#8212;<\/p>\n<\/blockquote>\n<p>\u914d\u5217\u306e\u8981\u7d20\u6570\u306f<span>4<\/span>\u3067\u3059\u3002<span>length<\/span>\u3067\u8981\u7d20\u6570\u304c\u53d6\u5f97\u3067\u304d\u307e\u3057\u305f\u306d\u3002<\/p>\n<p>\u3082\u3046\u3072\u3068\u3064\u3001\u6b21\u306e\u5834\u5408\u306f\u3069\u3046\u306a\u308b\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">String strs[] = new String[2];\r\nSystem.out.println(strs.length);\r\n<\/pre>\n<p>\u914d\u5217\u3092\u521d\u671f\u5316\u3057\u305f\u3060\u3051\u3067\u5404\u8981\u7d20\u306b\u306f\u4f55\u3082\u5165\u3063\u3066\u3044\u306a\u3044\u72b6\u614b\uff08<span>null<\/span>\uff09\u3067\u3059\u304c\u3053\u308c\u3092\u5b9f\u884c\u3059\u308b\u3068\u7d50\u679c\u306f<span>2<\/span>\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>strs[0]\u3084<span>strs[1]<\/span>\u306f<span>null<\/span>\u3067\u3059\u304c\u3001\u8981\u7d20\u6570\u3068\u3057\u3066\u306f\u30ab\u30a6\u30f3\u30c8\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u306d\u3002\u8981\u7d20\u306e\u4e2d\u8eab\u304c<span>null<\/span>\u3067\u3042\u3063\u3066\u3082\u8981\u7d20\u6570\u306b\u306f\u542b\u307e\u308c\u308b\u70b9\u3092\u899a\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u307e\u305f\u6b21\u306e\u3088\u3046\u306a\u5834\u5408\u306f\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u3068\u306a\u308a\u307e\u3059\u306e\u3067\u6ce8\u610f\u3057\u307e\u3057\u3087\u3046<\/p>\n<pre class=\"prettyprint lang:default decode:true\">String strs[] = {\"\u3072\u3068\u3064\", \"\u3075\u305f\u3064\", \"\u307f\u3063\u3064\"};\r\nSystem.out.println(strs[0].length);\r\n<\/pre>\n<p>length\u306f\u914d\u5217\u304c\u6301\u3064\u30d5\u30a3\u30fc\u30eb\u30c9\u3067\u3059\u306e\u3067\u3001<span>strs[0]<\/span>\u306e\u4e2d\u8eab\u3067\u3042\u308b<span>String<\/span>\u578b\u306e\u8981\u7d20\u304b\u3089\u306f\u53d6\u5f97\u3067\u304d\u307e\u305b\u3093\u3002<span>String<\/span>\u578b\u3067\u306f<span>length<\/span>\u3068\u3044\u3046\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u306a\u3044\u304b\u3089\u3067\u3059\u3002<\/p>\n<h3><span id=\"-length-2\">\uff12-\uff12\uff0e\u4e8c\u6b21\u5143\u914d\u5217\u3067<span>length<\/span>\u3092\u4f7f\u3046<\/span><\/h3>\n<p>\u3057\u304b\u3057<span>strs[i].length<\/span>\u3068\u3044\u3046\u66f8\u304d\u65b9\u304c\u7d76\u5bfe\u306b\u3067\u304d\u306a\u3044\u304b\u3068\u3044\u3046\u3068\u305d\u3093\u306a\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u305d\u308c\u304c\u3067\u304d\u308b\u306e\u306f\u4e8c\u6b21\u5143\u914d\u5217\u306e\u8981\u7d20\u6570\u3092\u53d6\u5f97\u3059\u308b\u5834\u5408\u3067\u3059\u3002\u203b\u4e8c\u6b21\u5143\u914d\u5217\u3068\u306f\u3001\u8981\u7d20\u306b\u914d\u5217\u3092\u6301\u3064\u914d\u5217\u306e\u3053\u3068\u3067\u3059\u3002\u3053\u308c\u306b\u5bfe\u3057\u3066\u901a\u5e38\u306e\u914d\u5217\u306f\u4e00\u6b21\u5143\u914d\u5217\u3068\u3044\u3044\u307e\u3059\u3002<\/p>\n<p>\u4e8c\u6b21\u5143\u914d\u5217\u306b\u3064\u3044\u3066\u3088\u304f\u308f\u304b\u3089\u306a\u3044\u4eba\u306f\u672c\u9805\u3092\u8aad\u307f\u98db\u3070\u3057\u3066\u3044\u305f\u3060\u3044\u3066\u69cb\u3044\u307e\u305b\u3093\u3002\u3053\u3053\u3067\u66f8\u3044\u3066\u3044\u308b\u3053\u3068\u3092\u7406\u89e3\u3059\u308b\u306e\u306f\u4e8c\u6b21\u5143\u914d\u5217\u3092\u77e5\u3063\u3066\u304b\u3089\u3067\u554f\u984c\u306a\u3044\u3067\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">String strs[][] = {\r\n\t\t\t{\"1-1\",\"1-2\"},\r\n\t\t\t{\"2-1\",\"2-2\",\"2-3\"},\r\n\t\t\t{\"3-1\",\"3-2\",\"3-3\",\"3-4\"}\r\n\t\t\t};\r\nSystem.out.println(\"strs\u306e\u9577\u3055:\" + strs.length);\r\nSystem.out.println(\"strs[0]\u306e\u9577\u3055:\" + strs[0].length);\r\nSystem.out.println(\"strs[1]\u306e\u9577\u3055:\" + strs[1].length);\r\nSystem.out.println(\"strs[2]\u306e\u9577\u3055:\" + strs[2].length);\r\n<\/pre>\n<p>\u7d50\u679c\u306f\u4ee5\u4e0b\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n<blockquote>\n<p>&#8212;<\/p>\n<p>strs\u306e\u9577\u3055<span>:3<\/span><\/p>\n<p>strs[0]\u306e\u9577\u3055<span>:2<\/span><\/p>\n<p>strs[1]\u306e\u9577\u3055<span>:3<\/span><\/p>\n<p>strs[2]\u306e\u9577\u3055<span>:4<\/span><\/p>\n<p>&#8212;<\/p>\n<\/blockquote>\n<p>\u307e\u305a\u914d\u5217<span>strs<\/span>\u81ea\u8eab\u306e\u9577\u3055\u306f<span>3<\/span>\u3064\u306e\u8981\u7d20\u304c\u683c\u7d0d\u3055\u308c\u3066\u3044\u308b\u306e\u3067<span>3<\/span>\u304c\u51fa\u529b\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u305d\u3057\u3066\u5404\u8981\u7d20\u3082\u914d\u5217\u306a\u306e\u3067\u305d\u308c\u305e\u308c\u304c<span>length<\/span>\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u5404\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3066<span>length<\/span>\u306b\u3088\u308b\u8981\u7d20\u6570\u306e\u53d6\u5f97\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u308b\u306e\u3067\u3059\u3002\u3053\u308c\u304c<span>strs[i].length<\/span>\u3068\u3044\u3046\u66f8\u304d\u65b9\u304c\u3067\u304d\u308b\u4f8b\u3067\u3059\u3002\u3042\u304f\u307e\u3067\u914d\u5217\u306e\u8981\u7d20\u6570\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306b\u4f7f\u3063\u3066\u3044\u308b\u3053\u3068\u304c\u30dd\u30a4\u30f3\u30c8\u3067\u3059\u3002<\/p>\n<h3><span id=\"-Forlength\">\uff12-\uff13\uff0eFor\u6587\u3067<span>length<\/span>\u3092\u4f7f\u3046\u3068\u4fbf\u5229<\/span><\/h3>\n<p>\u3053\u3053\u307e\u3067<span>length<\/span>\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3092\u898b\u3066\u304d\u307e\u3057\u305f\u304c\u3001\u6b21\u306f\u3082\u3046\u5c11\u3057\u5177\u4f53\u7684\u306a\u4f7f\u3044\u65b9\u3068\u3057\u3066<span>For<\/span>\u6587\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u65b9\u6cd5\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<p>\u307e\u305a\u306f\u3053\u3061\u3089\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">String strs[] = {\"\u3072\u3068\u3064\", \"\u3075\u305f\u3064\", \"\u307f\u3063\u3064\"};\r\n\r\nfor(int i = 0; i &lt; 3; i++) {\r\n\tSystem.out.println(strs[i]);\r\n}<\/pre>\n<p>\u914d\u5217\u306e\u8981\u7d20\u3092\u3072\u3068\u3064\u305a\u3064\u53d6\u308a\u51fa\u3057\u3066\u3059\u3079\u3066\u306e\u8981\u7d20\u3092\u51fa\u529b\u3055\u305b\u3066\u3044\u307e\u3059\u306e\u3067\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u7d50\u679c\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<blockquote>\n<p>&#8212;<\/p>\n<p>\u3072\u3068\u3064<\/p>\n<p>\u3075\u305f\u3064<\/p>\n<p>\u307f\u3063\u3064<\/p>\n<p>&#8212;<\/p>\n<\/blockquote>\n<p>\u305f\u3060\u3053\u306e<span>For<\/span>\u6587\u3001\u7e70\u308a\u8fd4\u3057\u6761\u4ef6\u3068\u3057\u3066\u300c<span>i &lt; 3<\/span>\u300d\u3068\u76f4\u63a5\u6570\u5b57\u3092\u6307\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u914d\u5217\u306e\u8981\u7d20\u6570\u304c\u5fc5\u305a<span>3<\/span>\u3067\u3042\u308c\u3070\u3053\u308c\u3067\u3082\u554f\u984c\u306f\u306a\u3044\u3067\u3059\u304c\u3001\u8981\u7d20\u6570\u304c\u5909\u308f\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u5834\u5408\u306f\u30de\u30ba\u3044\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u914d\u5217\u306e\u8981\u7d20\u6570\u304c<span>3<\/span>\u3088\u308a\u591a\u304f\u3066\u5168\u8981\u7d20\u304c\u51fa\u529b\u3055\u308c\u305a\u671f\u5f85\u3057\u305f\u7d50\u679c\u304c\u5f97\u3089\u308c\u306a\u3044\u306e\u306f\u307e\u3060\u30de\u30b7\u3067\u3001\u914d\u5217\u306e\u8981\u7d20\u6570\u304c<span>3<\/span>\u672a\u6e80\u306e\u5834\u5408\u306f\u4f8b\u5916\u304c\u767a\u751f\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n<p>\u305d\u3093\u306a\u5834\u5408\u306f<span>length<\/span>\u306e\u51fa\u756a\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u7e70\u308a\u8fd4\u3057\u6761\u4ef6\u3092\u66f8\u304d\u63db\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">String strs[] = {\"\u3072\u3068\u3064\", \"\u3075\u305f\u3064\", \"\u307f\u3063\u3064\"};\r\n\r\nfor(int i = 0; i &lt; strs.length; i++) {\r\n\tSystem.out.println(strs[i]);\r\n}<\/pre>\n<p>\u7d50\u679c\u306f\u5148\u307b\u3069\u306e\u30b3\u30fc\u30c9\u3068\u540c\u69d8\u3067\u3059\u3002\u3057\u304b\u3057\u3053\u3061\u3089\u306f\u7e70\u308a\u8fd4\u3057\u6761\u4ef6\u3092\u300c<span>i &lt; strs.length<\/span>\u300d\u3068\u3057\u305f\u3053\u3068\u3067\u914d\u5217\u306e\u8981\u7d20\u6570\u304c\u6bd4\u8f03\u5bfe\u8c61\u3068\u306a\u308a\u3069\u3093\u306a\u9577\u3055\u306e\u914d\u5217\u3067\u3082\u5bfe\u5fdc\u3067\u304d\u308b<span>For<\/span>\u6587\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<p>\u4ee5\u4e0a\u304c\u914d\u5217\u306e\u8981\u7d20\u6570\u3092\u53d6\u5f97\u3059\u308b<span>length<\/span>\u306e\u4f7f\u3044\u65b9\u3067\u3057\u305f\uff01<\/p>\n<h2><span id=\"Javalength-2\">\uff13\uff0e\u3010Java\u3011length()\u306f\u6587\u5b57\u5217\u306e\u6587\u5b57\u6570\u3092\u53d6\u5f97\u3059\u308b<\/span><\/h2>\n<h3><span id=\"-length-3\">\uff13-\uff11\uff0elength()\u306e\u4f7f\u3044\u65b9<\/span><\/h3>\n<ul><\/ul>\n<p>length()\u306f<span>String<\/span>\u30af\u30e9\u30b9\u3067\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u30e1\u30bd\u30c3\u30c9\u3067\u623b\u308a\u5024\u306f<span>int<\/span>\u578b\u3067\u6587\u5b57\u5217\u306e\u6587\u5b57\u6570\u3092\u8fd4\u3057\u307e\u3059\u3002\u3068\u3044\u3046\u3053\u3068\u3067\u3001\u3055\u3063\u305d\u304f\u4f7f\u3044\u65b9\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">String str = \"\u6587\u5b57\u5217\u3092\u8fd4\u3059method\";\r\nSystem.out.println(str.length());\r\n<\/pre>\n<p>\u5b9f\u884c\u3057\u305f\u7d50\u679c\u306f<span>12<\/span>\u3067\u3059\u3002\u5168\u89d2\u3082\u534a\u89d2\u3082\u540c\u69d8\u306b<span>1<\/span>\u6587\u5b57\u3068\u3057\u3066\u6271\u308f\u308c\u300c\u6587\u5b57\u6570\u300d\u3092\u8fd4\u3057\u3066\u3044\u307e\u3059\u306d\u3002\u307e\u305f\u3001\u6539\u884c\u30b3\u30fc\u30c9\u306a\u3069\u3082\u540c\u69d8\u306b\u6587\u5b57\u6570\u3068\u3057\u3066\u6271\u308f\u308c\u307e\u3059\u306e\u3067\u899a\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3><span id=\"-length-4\">\uff13-\uff12\uff0e\u914d\u5217\u3067<span>length()<\/span>\u3092\u4f7f\u3046<\/span><\/h3>\n<p>\u6b21\u306b<span>length()<\/span>\u3092\u914d\u5217\u3067\u4f7f\u304a\u3046\u3068\u3059\u308b\u3068\u3069\u3046\u306a\u308b\u304b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">String strs[] = {\"\u3072\u3068\u3064\", \"\u3075\u305f\u3064\", \"\u307f\u3063\u3064\", \"\u3088\u3063\u3064\"};\r\nSystem.out.println(strs[0].length());\r\n<\/pre>\n<p>\u5b9f\u884c\u7d50\u679c\u306f<span>3<\/span>\u304c\u51fa\u529b\u3055\u308c\u307e\u3059\u3002Str[0]\u306b\u306f<span>String<\/span>\u578b\u306e\u8981\u7d20\u3067\u3042\u308b<span>&#8220;<\/span>\u3072\u3068\u3064<span>&#8220;<\/span>\u304c\u5165\u3063\u3066\u3044\u3066\u3001<span>length()<\/span>\u306f<span>String<\/span>\u578b\u306e\u8981\u7d20\u306e\u6587\u5b57\u6570\u3092\u8fd4\u3057\u3066\u3044\u307e\u3059\u3002String\u3060\u304b\u3089\u3068\u3044\u3063\u3066\u6b21\u306e\u3088\u3046\u306b\u3059\u308b\u3068\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"prettyprint lang:default decode:true\">String strs[] = {\"\u3072\u3068\u3064\", \"\u3075\u305f\u3064\", \"\u307f\u3063\u3064\"};\r\nSystem.out.println(strs.length());\r\n<\/pre>\n<p>\u914d\u5217\u3067\u3042\u308b<span>String[]<\/span>\u3067\u306f<span>length()<\/span>\u304c\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u306a\u3044\u305f\u3081\u30a8\u30e9\u30fc\u3068\u306a\u3063\u3066\u3057\u307e\u3046\u306e\u3067\u3059\u3002<\/p>\n<p>\u914d\u5217\u306e<span>length<\/span>\u3068<span>String<\/span>\u306e<span>length()<\/span>\u306e\u9055\u3044\u3092\u7406\u89e3\u3057\u3066\u3044\u306a\u3044\u3068\u3001\u521d\u5fc3\u8005\u306e\u65b9\u306f\u6df7\u4e71\u3059\u308b\u30dd\u30a4\u30f3\u30c8\u306b\u306a\u308a\u3046\u308b\u306e\u3067\u3057\u3063\u304b\u308a\u3068\u7406\u89e3\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<h2><span id=\"i\">\uff14\uff0e\u307e\u3068\u3081<\/span><\/h2>\n<p>length\u3068<span>length()<\/span>\u306e\u9055\u3044\u3068\u305d\u308c\u305e\u308c\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u898b\u3066\u304d\u307e\u3057\u305f\u3002<\/p>\n<p>\u30d5\u30a3\u30fc\u30eb\u30c9\u3068\u30e1\u30bd\u30c3\u30c9\u306e\u9055\u3044\u3001\u540c\u3058\u9577\u3055\u3092\u53d6\u308b\u3067\u3082\u5bfe\u8c61\u304c\u9055\u3046\u3053\u3068\u3092\u7406\u89e3\u3059\u308c\u3070\u6df7\u4e71\u3059\u308b\u3053\u3068\u306f\u306a\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u672c\u8a18\u4e8b\u304c\u7406\u89e3\u3078\u306e\u4e00\u52a9\u306b\u306a\u308c\u3070\u5e78\u3044\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u300c\u914d\u5217\u306e\u9577\u3055\u300d\u3084\u300c\u6587\u5b57\u5217\u306e\u9577\u3055\u300d\u3068\u3044\u3063\u305f\u8868\u73fe\u3067\u6570\u3092\u8868\u3059\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u3057\u3066\u3053\u308c\u3089\u300c\u9577\u3055\u300d\u3092\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u4e2d\u3067\u5229\u7528\u3059\u308b\u3053\u3068\u3082\u591a\u3044\u3067\u3059\u3002\u4eca\u56de\u306fJava\u306e\u300c\u9577\u3055\u300d\uff1dlength\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u3066\u3044\u304d\u305f\u3044 [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":3248,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[14],"acf":[],"_links":{"self":[{"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/posts\/3245"}],"collection":[{"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/comments?post=3245"}],"version-history":[{"count":6,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/posts\/3245\/revisions"}],"predecessor-version":[{"id":6072,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/posts\/3245\/revisions\/6072"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/media\/3248"}],"wp:attachment":[{"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/media?parent=3245"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bold.ne.jp\/engineer-club\/wp-json\/wp\/v2\/categories?post=3245"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}