{"id":75879,"date":"2024-03-20T16:19:56","date_gmt":"2024-03-20T07:19:56","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java-%e3%81%ae%e3%83%86%e3%82%ad%e3%82%b9%e3%83%88%e3%82%92%e5%b7%a6%e5%8f%b3%e3%81%ab%e6%8f%83%e3%81%88%e3%82%8b%e6%96%b9%e6%b3%95%e3%82%92%e6%95%99%e3%81%88%e3%81%a6%e3%81%8f%e3%81%a0%e3%81%95\/"},"modified":"2025-08-11T14:07:21","modified_gmt":"2025-08-11T05:07:21","slug":"java-%e3%81%ae%e3%83%86%e3%82%ad%e3%82%b9%e3%83%88%e3%82%92%e5%b7%a6%e5%8f%b3%e3%81%ab%e6%8f%83%e3%81%88%e3%82%8b%e6%96%b9%e6%b3%95%e3%82%92%e6%95%99%e3%81%88%e3%81%a6%e3%81%8f%e3%81%a0%e3%81%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java-%e3%81%ae%e3%83%86%e3%82%ad%e3%82%b9%e3%83%88%e3%82%92%e5%b7%a6%e5%8f%b3%e3%81%ab%e6%8f%83%e3%81%88%e3%82%8b%e6%96%b9%e6%b3%95%e3%82%92%e6%95%99%e3%81%88%e3%81%a6%e3%81%8f%e3%81%a0%e3%81%95\/","title":{"rendered":"Java \u306e\u30c6\u30ad\u30b9\u30c8\u3092\u5de6\u53f3\u306b\u63c3\u3048\u308b\u65b9\u6cd5\u3092\u6559\u3048\u3066\u304f\u3060\u3055\u3044\u3002"},"content":{"rendered":"<p>Java\u3067\u306fStringBuilder\u30af\u30e9\u30b9\u3068\u6587\u5b57\u5217\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u6587\u5b57\u5217\u306e\u5de6\u53f3\u63c3\u3048\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u5de6\u5bc4\u305b\u3059\u308b\u306b\u306f\u3001StringBuffer\u306eappend\u30e1\u30bd\u30c3\u30c9\u3067\u6587\u5b57\u5217\u3092\u9010\u6b21\u8ffd\u52a0\u3057\u3001\u5404\u6587\u5b57\u5217\u306e\u5f8c\u308d\u306b\u9069\u6b63\u306a\u6570\u306e\u7a7a\u767d\u3092\u8ffd\u52a0\u3057\u3066\u3001\u5fc5\u8981\u306a\u5e45\u306b\u3057\u307e\u3059\u3002\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> String <span class=\"hljs-title function_\">leftAlign<\/span><span class=\"hljs-params\">(String text, <span class=\"hljs-type\">int<\/span> width)<\/span> {\r\n    <span class=\"hljs-type\">StringBuilder<\/span> <span class=\"hljs-variable\">sb<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">StringBuilder<\/span>(text);\r\n    <span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">padding<\/span> <span class=\"hljs-operator\">=<\/span> width - text.length();\r\n    <span class=\"hljs-keyword\">for<\/span> (<span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">i<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-number\">0<\/span>; i &lt; padding; i++) {\r\n        sb.append(<span class=\"hljs-string\">\" \"<\/span>);\r\n    }\r\n    <span class=\"hljs-keyword\">return<\/span> sb.toString();\r\n}\r\n<\/code><\/pre>\n<p>\u53f3\u63c3\u3048\u306e\u5834\u5408\u3001StringBuilder\u306einsert\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u5fc5\u8981\u306a\u5e45\u306b\u306a\u308b\u307e\u3067\u5404\u6587\u5b57\u5217\u306e\u524d\u306b\u9069\u5207\u306a\u6570\u306e\u7a7a\u767d\u3092\u633f\u5165\u3067\u304d\u307e\u3059\u3002\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> String <span class=\"hljs-title function_\">rightAlign<\/span><span class=\"hljs-params\">(String text, <span class=\"hljs-type\">int<\/span> width)<\/span> {\r\n    <span class=\"hljs-type\">StringBuilder<\/span> <span class=\"hljs-variable\">sb<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">StringBuilder<\/span>();\r\n    <span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">padding<\/span> <span class=\"hljs-operator\">=<\/span> width - text.length();\r\n    <span class=\"hljs-keyword\">for<\/span> (<span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">i<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-number\">0<\/span>; i &lt; padding; i++) {\r\n        sb.append(<span class=\"hljs-string\">\" \"<\/span>);\r\n    }\r\n    sb.append(text);\r\n    <span class=\"hljs-keyword\">return<\/span> sb.toString();\r\n}\r\n<\/code><\/pre>\n<p>\u4f7f\u7528\u4f8b\uff1a<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title function_\">main<\/span><span class=\"hljs-params\">(String[] args)<\/span> {\r\n    <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">text<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-string\">\"Hello\"<\/span>;\r\n    <span class=\"hljs-type\">int<\/span> <span class=\"hljs-variable\">width<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-number\">10<\/span>;\r\n    \r\n    <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">leftAlignedText<\/span> <span class=\"hljs-operator\">=<\/span> leftAlign(text, width);\r\n    System.out.println(leftAlignedText); <span class=\"hljs-comment\">\/\/ Output: \"Hello     \"<\/span>\r\n    \r\n    <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">rightAlignedText<\/span> <span class=\"hljs-operator\">=<\/span> rightAlign(text, width);\r\n    System.out.println(rightAlignedText); <span class=\"hljs-comment\">\/\/ Output: \"     Hello\"<\/span>\r\n}\r\n<\/code><\/pre>\n<p>\u524d\u8a18\u30b5\u30f3\u30d7\u30eb\u306f\u5de6\u53f3\u63c3\u3048\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306b\u6587\u5b57\u5217\u306e\u5f8c\u65b9\u307e\u305f\u306f\u524d\u65b9\u3078\u9069\u5207\u306a\u5206\u91cf\u306e\u7a7a\u767d\u3092\u8ffd\u52a0\u3057\u3001\u8907\u96d1\u306a\u6298\u308a\u8fd4\u3057\u306a\u3069\u306e\u72b6\u6cc1\u306f\u8003\u616e\u3057\u3066\u3044\u307e\u305b\u3093\u3002\u5168\u4f53\u306e\u30c6\u30ad\u30b9\u30c8\u3092\u5de6\u53f3\u63c3\u3048\u306b\u3057\u3001\u6298\u308a\u8fd4\u3057\u72b6\u6cc1\u306a\u3069\u3092\u8003\u616e\u3059\u308b\u5834\u5408\u306f\u3001\u3088\u308a\u8907\u96d1\u306a\u4ed5\u7d44\u307f\u304c\u5fc5\u8981\u306b\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u3067\u306fStringBuilder\u30af\u30e9\u30b9\u3068\u6587\u5b57\u5217\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u6587\u5b57\u5217\u306e\u5de6\u53f3\u63c3\u3048\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002 \u5de6\u5bc4\u305b\u3059\u308b\u306b\u306f\u3001StringBuffer\u306eappend\u30e1\u30bd\u30c3\u30c9\u3067\u6587\u5b57\u5217\u3092\u9010\u6b21\u8ffd\u52a0\u3057\u3001\u5404\u6587\u5b57\u5217\u306e\u5f8c\u308d\u306b\u9069\u6b63\u306a [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-75879","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-26","tag-61"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - 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