{"id":103173,"date":"2024-03-22T06:28:34","date_gmt":"2024-03-21T21:28:34","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java%e6%96%87%e5%ad%97%e5%88%97%e3%81%aeindex%e3%81%8c%e7%af%84%e5%9b%b2%e5%a4%96%e3%81%ab%e3%81%aa%e3%82%8b%e5%95%8f%e9%a1%8c%e5%af%be%e5%87%a6%e6%b3%95\/"},"modified":"2024-04-04T15:46:08","modified_gmt":"2024-04-04T06:46:08","slug":"java%e6%96%87%e5%ad%97%e5%88%97%e3%81%aeindex%e3%81%8c%e7%af%84%e5%9b%b2%e5%a4%96%e3%81%ab%e3%81%aa%e3%82%8b%e5%95%8f%e9%a1%8c%e5%af%be%e5%87%a6%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e6%96%87%e5%ad%97%e5%88%97%e3%81%aeindex%e3%81%8c%e7%af%84%e5%9b%b2%e5%a4%96%e3%81%ab%e3%81%aa%e3%82%8b%e5%95%8f%e9%a1%8c%e5%af%be%e5%87%a6%e6%b3%95\/","title":{"rendered":"Java\u6587\u5b57\u5217\u306eindex\u304c\u7bc4\u56f2\u5916\u306b\u306a\u308b\u554f\u984c\u5bfe\u51e6\u6cd5"},"content":{"rendered":"

\u6587\u5b57\u5217\u4e2d\u306e\u6587\u5b57\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u6587\u5b57\u5217\u306e\u8a31\u5bb9\u7bc4\u56f2\u3092\u8d85\u3048\u3066\u3044\u308b\u3068\u300c\u6587\u5b57\u5217\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u7bc4\u56f2\u5916\u3067\u3059\u300d\u3068\u3044\u3046\u30a8\u30e9\u30fc\u304c\u51fa\u307e\u3059\u3002 \u3053\u308c\u306f\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c0\u672a\u6e80\u304b\u6587\u5b57\u5217\u306e\u9577\u3055\u4ee5\u4e0a\u3067\u3042\u308b\u5834\u5408\u306b\u8d77\u3053\u308a\u307e\u3059\u3002 \u3053\u306e\u554f\u984c\u3092\u89e3\u6c7a\u3059\u308b\u65b9\u6cd5\u306f\u6b21\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n

    \n
  1. \u30a4\u30f3\u30c7\u30af\u30b9\u304c\u6b63\u3057\u3044\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b: \u4f7f\u7528\u3057\u3066\u3044\u308b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u5024\u304c\u6587\u5b57\u5217\u306e\u6709\u52b9\u7bc4\u56f2\u5185\u3067\u3042\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u6587\u5b57\u5217\u306e\u30a4\u30f3\u30c7\u30af\u30b9\u306f 0 \u304b\u3089\u59cb\u307e\u308a\u3001\u6700\u5f8c\u306e\u6587\u5b57\u306e\u30a4\u30f3\u30c7\u30af\u30b9\u306f\u6587\u5b57\u5217\u306e\u9577\u3055\u304b\u3089 1 \u5f15\u3044\u305f\u3082\u306e\u3067\u3059\u3002<\/li>\n
  2. \u6587\u5b57\u5217\u304c\u7a7a\u304b\u3069\u3046\u304b\u306e\u78ba\u8a8d\uff1a\u6587\u5b57\u5217\u304c\u7a7a\uff08null\uff09\u306e\u5834\u5408\u306f\u3001\u6587\u5b57\u5217\u5185\u306e\u6587\u5b57\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u8a66\u307f\u308b\u3068\u3001\u300c\u6587\u5b57\u5217\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u7bc4\u56f2\u5916\u300d\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\u3002\u6587\u5b57\u5217\u3092\u4f7f\u7528\u3059\u308b\u524d\u306b\u3001\u5fc5\u305a\u6587\u5b57\u5217\u304c\u7a7a\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u3002<\/li>\n
  3. \u6587\u5b57\u5217\u306e\u9577\u3055\u306b\u3088\u308b\u691c\u8a3c\uff1a\u6587\u5b57\u5217\u306e\u9577\u3055\u5c5e\u6027\uff08length()\u30e1\u30bd\u30c3\u30c9\uff09\u3092\u4f7f\u3063\u3066\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u6709\u52b9\u7bc4\u56f2\u5185\u304b\u3092\u691c\u8a3c\u3067\u304d\u307e\u3059\u3002\u4f8b\u3048\u3070\u6587\u5b57\u5217\u306e\u6700\u521d\u306e\u6587\u5b57\u3092\u53d6\u5f97\u3059\u308b\u5834\u5408\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9 0 \u3092\u4f7f\u3044\u3001\u6587\u5b57\u5217\u306e\u9577\u3055\u3068\u6bd4\u8f03\u3057\u307e\u3059\u3002<\/li>\n
  4. String str = “example”;
    \nif (str.length() > 0) {
    \nchar firstChar = str.charAt(0);
    \n\/\/ \u6587\u5b57\u5217\u306e\u5148\u982d\u6587\u5b57\u5217\u306b\u95a2\u3059\u308b\u51e6\u7406\u3092\u7d9a\u3051\u308b
    \n} else {
    \n\/\/ \u6587\u5b57\u5217\u304c\u7a7a\u3060\u3063\u305f\u5834\u5408\u306e\u51e6\u7406
    \n}<\/li>\n
  5. \u30eb\u30fc\u30d7\u306b\u3088\u308b\u53cd\u5fa9\uff1a\u6587\u5b57\u5217\u306e\u5404\u6587\u5b57\u3092\u51e6\u7406\u3059\u308b\u5834\u5408\u3001\u30eb\u30fc\u30d7\u3092\u4f7f\u3046\u3053\u3068\u3067\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u8d8a\u3048\u3092\u56de\u907f\u3067\u304d\u307e\u3059\u3002\u30eb\u30fc\u30d7\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u6587\u5b57\u5217\u5185\u306e\u5404\u6587\u5b57\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u524d\u306b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u6709\u52b9\u7bc4\u56f2\u5185\u306b\u3042\u308b\u304b\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/li>\n
  6. \u6587\u5b57\u5217 str = “example” \u3068\u3059\u308b\u3002
    \nint i = 0 \u3067\u3042\u308a\u3001i < str.length() \u3067\u3042\u308b\u9650\u308a\u3001i++ \u3068\u3059\u308b\u3002
    \nchar ch = str.charAt(i) \u3068\u3059\u308b\u3002
    \n\/\/ \u6587\u5b57 ch \u3092\u51e6\u7406\u3059\u308b<\/li>\n
  7. \u30c7\u30d0\u30c3\u30b0\u3068\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0: \u4e0a\u8a18\u306e\u3044\u305a\u308c\u306e\u65b9\u6cd5\u3082\u89e3\u6c7a\u3057\u306a\u3044\u5834\u5408\u306f\u3001\u30c7\u30d0\u30c3\u30b0\u30c4\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u3066\u30b3\u30fc\u30c9\u3092\u8ffd\u8de1\u3057\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u7bc4\u56f2\u5916\u30a8\u30e9\u30fc\u306e\u539f\u56e0\u7b87\u6240\u3092\u8abf\u3079\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3055\u3089\u306b\u3001try-catch \u30d6\u30ed\u30c3\u30af\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u300cString index out of range\u300d\u4f8b\u5916\u3092\u6355\u6349\u3057\u3066\u51e6\u7406\u3067\u304d\u308b\u305f\u3081\u3001\u3088\u308a\u512a\u308c\u305f\u30a8\u30e9\u30fc\u51e6\u7406\u3068\u30e6\u30fc\u30b6\u30fc\u30d5\u30ec\u30f3\u30c9\u30ea\u30fc\u306a\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u63d0\u4f9b\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ol>\n

    \u3053\u308c\u3089\u306e\u65b9\u6cd5\u304c\u300c\u914d\u5217\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u7bc4\u56f2\u3092\u8d85\u3048\u308b\u300d\u554f\u984c\u306e\u89e3\u6c7a\u306b\u5f79\u7acb\u3066\u3089\u308c\u308b\u3053\u3068\u3092\u9858\u3063\u3066\u3044\u307e\u3059\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"

    \u6587\u5b57\u5217\u4e2d\u306e\u6587\u5b57\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u6587\u5b57\u5217\u306e\u8a31\u5bb9\u7bc4\u56f2\u3092\u8d85\u3048\u3066\u3044\u308b\u3068\u300c\u6587\u5b57\u5217\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u7bc4\u56f2\u5916\u3067\u3059\u300d\u3068\u3044\u3046\u30a8\u30e9\u30fc\u304c\u51fa\u307e\u3059\u3002 \u3053\u308c\u306f\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c0\u672a\u6e80\u304b\u6587\u5b57\u5217\u306e\u9577\u3055\u4ee5\u4e0a\u3067\u3042\u308b\u5834\u5408\u306b\u8d77\u3053\u308a\u307e\u3059\u3002 \u3053\u306e\u554f\u984c\u3092\u89e3\u6c7a\u3059\u308b […]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-103173","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nJava\u6587\u5b57\u5217\u306eindex\u304c\u7bc4\u56f2\u5916\u306b\u306a\u308b\u554f\u984c\u5bfe\u51e6\u6cd5 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/ja\/blog\/java\u6587\u5b57\u5217\u306eindex\u304c\u7bc4\u56f2\u5916\u306b\u306a\u308b\u554f\u984c\u5bfe\u51e6\u6cd5\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Java\u6587\u5b57\u5217\u306eindex\u304c\u7bc4\u56f2\u5916\u306b\u306a\u308b\u554f\u984c\u5bfe\u51e6\u6cd5\" \/>\n<meta property=\"og:description\" content=\"\u6587\u5b57\u5217\u4e2d\u306e\u6587\u5b57\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u6587\u5b57\u5217\u306e\u8a31\u5bb9\u7bc4\u56f2\u3092\u8d85\u3048\u3066\u3044\u308b\u3068\u300c\u6587\u5b57\u5217\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u7bc4\u56f2\u5916\u3067\u3059\u300d\u3068\u3044\u3046\u30a8\u30e9\u30fc\u304c\u51fa\u307e\u3059\u3002 \u3053\u308c\u306f\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c0\u672a\u6e80\u304b\u6587\u5b57\u5217\u306e\u9577\u3055\u4ee5\u4e0a\u3067\u3042\u308b\u5834\u5408\u306b\u8d77\u3053\u308a\u307e\u3059\u3002 \u3053\u306e\u554f\u984c\u3092\u89e3\u6c7a\u3059\u308b […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/java\u6587\u5b57\u5217\u306eindex\u304c\u7bc4\u56f2\u5916\u306b\u306a\u308b\u554f\u984c\u5bfe\u51e6\u6cd5\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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