{"id":129727,"date":"2024-03-25T11:48:40","date_gmt":"2024-03-25T02:48:40","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/arraylist%e3%82%bd%e3%83%bc%e3%82%b9%e3%82%b3%e3%83%bc%e3%83%89-remove%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89%e3%81%ae%e6%b5%81%e3%82%8c\/"},"modified":"2024-04-04T15:48:51","modified_gmt":"2024-04-04T06:48:51","slug":"arraylist%e3%82%bd%e3%83%bc%e3%82%b9%e3%82%b3%e3%83%bc%e3%83%89-remove%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89%e3%81%ae%e6%b5%81%e3%82%8c","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/arraylist%e3%82%bd%e3%83%bc%e3%82%b9%e3%82%b3%e3%83%bc%e3%83%89-remove%e3%83%a1%e3%82%bd%e3%83%83%e3%83%89%e3%81%ae%e6%b5%81%e3%82%8c\/","title":{"rendered":"ArrayList\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9 – Remove\u30e1\u30bd\u30c3\u30c9\u306e\u6d41\u308c"},"content":{"rendered":"

ArrayList\u306eremove\u30e1\u30bd\u30c3\u30c9\u306f\u3001ArrayList\u3067\u6307\u5b9a\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u4f4d\u7f6e\u306b\u3042\u308b\u8981\u7d20\u3092\u524a\u9664\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306fArrayList\u306eremove\u30e1\u30bd\u30c3\u30c9\u306e\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u3068\u30d5\u30ed\u30fc\u30c1\u30e3\u30fc\u30c8\u3067\u3059\u3002<\/p>\n

public<\/span> E remove<\/span>(int<\/span> index)<\/span> {\r\nrangeCheck(index); \/\/ \u68c0\u67e5\u7d22\u5f15\u662f\u5426\u8d8a\u754c<\/span>\r\nmodCount++; \/\/ \u4fee\u6539ArrayList\u7ed3\u6784\u7684\u64cd\u4f5c\u6570\u52a01<\/span>\r\nE<\/span> oldValue<\/span> =<\/span> elementData(index); \/\/ \u83b7\u53d6\u8981\u5220\u9664\u7684\u5143\u7d20<\/span>\r\nint<\/span> numMoved<\/span> =<\/span> size - index - 1<\/span>;\r\nif<\/span> (numMoved > 0<\/span>) {\r\nSystem.arraycopy(elementData, index + 1<\/span>, elementData, index, numMoved); \/\/ \u5c06\u540e\u9762\u7684\u5143\u7d20\u5f80\u524d\u79fb\u52a8\u4e00\u4f4d<\/span>\r\n}\r\nelementData[--size] = null<\/span>; \/\/ \u5c06\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u8bbe\u4e3anull\uff0c\u65b9\u4fbf\u5783\u573e\u56de\u6536<\/span>\r\nreturn<\/span> oldValue; \/\/ \u8fd4\u56de\u5220\u9664\u7684\u5143\u7d20<\/span>\r\n}\r\n<\/code><\/pre>\n
\u624b\u9806\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n
    \n
  1. \u9996\u5148\u3001rangeCheck(index)\u30e1\u30bd\u30c3\u30c9\u306b\u3088\u308a\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u7bc4\u56f2\u5916\u30c1\u30a7\u30c3\u30af\u304c\u884c\u308f\u308c\u3001\u7bc4\u56f2\u5916\u306e\u5834\u5408\u3001IndexOutOfBoundsException\u4f8b\u5916\u304c\u30b9\u30ed\u30fc\u3055\u308c\u307e\u3059\u3002<\/li>\n
  2. \u6b21\u306b\u3001modCount++\u3092\u884c\u3063\u3066ArrayList\u306e\u5909\u66f4\u56de\u6570\u3092\u30a4\u30f3\u30af\u30ea\u30e1\u30f3\u30c8\u3057\u3001\u30d5\u30a7\u30a4\u30eb\u30d5\u30a1\u30fc\u30b9\u30c8\u3092\u5b9f\u73fe\u3057\u307e\u3059\u3002<\/li>\n
  3. \u305d\u3057\u3066\u3001elementData(index)\u30e1\u30bd\u30c3\u30c9\u304b\u3089\u524a\u9664\u3055\u308c\u308b\u8981\u7d20\u3092\u53d6\u5f97\u3057\u3001oldValue\u5909\u6570\u306b\u683c\u7d0d\u3059\u308b\u3002<\/li>\n
  4. \u6b21\u306b\u3001\u79fb\u52d5\u3059\u308b\u8981\u7d20\u306e\u6570\u3092 numMoved = size – index – 1 \u3068\u8a08\u7b97\u3057\u307e\u3059\u3002numMoved > 0 \u306e\u5834\u5408\u306f\u3001\u305d\u308c\u4ee5\u964d\u306e\u8981\u7d20\u3092 1 \u3064\u524d\u65b9\u306b\u79fb\u52d5\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n
  5. System.arraycopy\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u5f8c\u308d\u306e\u8981\u7d20\u30921\u3064\u524d\u306b\u79fb\u52d5\u3057\u307e\u3059\u3002<\/li>\n
  6. \u6700\u5f8c\u306e\u8981\u7d20\u3092 null \u306b\u3059\u308b\u3053\u3068\u3067\u3001\u30ac\u30d9\u30fc\u30b8\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3057\u3084\u3059\u304f\u306a\u308b\u3002<\/li>\n
  7. \u6700\u5f8c\u306b\u524a\u9664\u3057\u305f\u8981\u7d20\u3092\u623b\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"
    ArrayList\u306eremove\u30e1\u30bd\u30c3\u30c9\u306f\u3001ArrayList\u3067\u6307\u5b9a\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u4f4d\u7f6e\u306b\u3042\u308b\u8981\u7d20\u3092\u524a\u9664\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306fArrayList\u306eremove\u30e1\u30bd\u30c3\u30c9\u306e\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u3068\u30d5\u30ed\u30fc\u30c1\u30e3\u30fc\u30c8\u3067\u3059\u3002 public E remo […]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-129727","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nArrayList\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9 - Remove\u30e1\u30bd\u30c3\u30c9\u306e\u6d41\u308c - 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\/arraylist\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9-remove\u30e1\u30bd\u30c3\u30c9\u306e\u6d41\u308c\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ArrayList\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9 - 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