- \n
- 2\u6b21\u5143\u914d\u5217\u306e\u4f7f\u3044\u65b9<\/b><\/li>\n
- \u591a\u6b21\u5143\u914d\u5217\u306e\u4f7f\u3044\u65b9<\/b><\/li>\n
- \u591a\u6b21\u5143\u914d\u5217\u306e\u9577\u3055<\/b><\/li>\n
- ArrayList\u3067\u4e8c\u6b21\u5143\u914d\u5217\u3092\u5ba3\u8a00\u3059\u308b\u65b9\u6cd5<\/b><\/li>\n<\/ul>\n<\/div>\n
\u306a\u3069\u57fa\u672c\u7684\u306a\u5185\u5bb9\u304b\u3089\u5fdc\u7528\u7684\u306a\u5185\u5bb9\u306b\u3064\u3044\u3066\u3082\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n
\u4eca\u56de\u306f2\u6b21\u5143\u914d\u5217\u3084\u591a\u6b21\u5143\u914d\u5217\u306b\u3064\u3044\u3066\u3001\u4f7f\u3044\u65b9\u3092\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3057\u307e\u3059\uff01<\/p>\n
\u306a\u304a\u3001Java\u306e\u8a18\u4e8b\u306b\u3064\u3044\u3066\u306f\u3001\u3053\u3061\u3089<\/a>\u306b\u307e\u3068\u3081\u3066\u3044\u307e\u3059\u3002<\/p>\n
2\u6b21\u5143\u914d\u5217\u306e\u4f7f\u3044\u65b9<\/h2>\n
2\u6b21\u5143\u914d\u5217\u3092\u5ba3\u8a00\u3059\u308b\u65b9\u6cd5\u3001\u521d\u671f\u5316\u3059\u308b\u65b9\u6cd5\u3001\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n
\u5ba3\u8a00<\/h3>\n
2\u6b21\u5143\u914d\u5217\u3092\u5ba3\u8a00\u3059\u308b\u65b9\u6cd5\u306b\u306f\u3044\u304f\u3064\u304b\u306e\u30d1\u30bf\u30fc\u30f3\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
\u578b\u540d[][] \u914d\u5217\u540d;\r\n\u914d\u5217\u540d = new \u578b\u540d[1\u6b21\u5143\u914d\u5217\u306e\u6570][];\r\n\u914d\u5217\u540d[0] = new \u578b\u540d[1\u6b21\u5143\u914d\u52170\u306e\u8981\u7d20\u6570];\r\n\u914d\u5217\u540d[1] = new \u578b\u540d[1\u6b21\u5143\u914d\u52171\u306e\u8981\u7d20\u6570];\r\n\u30fb\u30fb\u30fb\u30fb = \u30fb\u30fb\u30fb\u30fb<\/pre>\n
2\u6b21\u5143\u914d\u5217\u306e\u5ba3\u8a00\u3067\u3059\u306e\u3067\u3001\u914d\u5217\u3092\u3042\u3089\u308f\u3059\u300c[ ]\u300d\u8a18\u53f7\u30922\u3064\u4e26\u3079\u307e\u3059\u3002<\/p>\n
\u307e\u305f\u30011\u6b21\u5143\u914d\u52170\u306e\u8981\u7d20\u6570\u30681\u6b21\u5143\u914d\u52171\u306e\u8981\u7d20\u6570\u306e\u3088\u3046\u306b\u3001\u305d\u308c\u305e\u308c\u306e1\u6b21\u5143\u914d\u5217\u306e\u8981\u7d20\u6570\u306f\u540c\u3058\u6570\u5024\u3067\u306a\u304f\u3066\u3082\u69cb\u3044\u307e\u305b\u3093\u3002<\/p>\n
\u305d\u308c\u305e\u308c\u306e1\u6b21\u5143\u914d\u5217\u306e\u8981\u7d20\u6570\u3092\u5909\u3048\u305f\u3044\u5834\u5408\u306f\u3053\u306e\u3088\u3046\u306b\u5ba3\u8a00\u3057\u307e\u3059\u3002<\/p>\n
\u30d1\u30bf\u30fc\u30f3\u306e1\u884c\u76ee\u30682\u884c\u76ee\u3092\u307e\u3068\u3081\u3066\u6b21\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u3066\u3082\u304b\u307e\u3044\u307e\u305b\u3093\u3002<\/p>\n
\u578b\u540d[][] \u914d\u5217\u540d = new \u578b\u540d[1\u6b21\u5143\u914d\u5217\u306e\u6570][];\r\n\u914d\u5217\u540d[0] = new \u578b\u540d[1\u6b21\u5143\u914d\u52170\u306e\u8981\u7d20\u6570];\r\n\u914d\u5217\u540d[1] = new \u578b\u540d[1\u6b21\u5143\u914d\u52171\u306e\u8981\u7d20\u6570];\r\n\u30fb\u30fb\u30fb\u30fb = \u30fb\u30fb\u30fb\u30fb<\/pre>\n
1\u6b21\u5143\u914d\u5217\u306e\u8981\u7d20\u6570\u304c\u540c\u3058\u5834\u5408\u306f\u6b21\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u578b\u540d[][] \u914d\u5217\u540d = new \u578b\u540d[1\u6b21\u5143\u914d\u5217\u306e\u6570][1\u6b21\u5143\u914d\u5217\u5185\u306e\u8981\u7d20\u6570];<\/pre>\n
\u5ba3\u8a00\u3068\u540c\u6642\u306b\u521d\u671f\u5316\u3059\u308b\u65b9\u6cd5<\/h3>\n
\u307e\u305f\u3001\u5ba3\u8a00\u6642\u306b\u3042\u308f\u305b\u3066\u521d\u671f\u5316\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u6b21\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n
\u578b\u540d[][] \u914d\u5217\u540d = {{\u502411, \u502412, \u30fb\u30fb\u30fb}, {\u502422, \u502422, \u30fb\u30fb\u30fb}, \u30fb\u30fb\u30fb};<\/pre>\n\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
import java.util.Arrays;\r\n\r\npublic class Main {\r\n \r\n public static void main(String args[]) {\r\n char[][] arr = {{'a', 'b', 'c'}, \r\n {'a', 'b', 'c', 'd'}, \r\n {'a', 'b', 'c', 'd', 'e'}};\r\n \r\n System.out.println(Arrays.deepToString(arr));\r\n }\r\n}<\/pre>\n\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
[[a, b, c], [a, b, c, d], [a, b, c, d, e]]<\/pre>\n
\u3053\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u306f\u30012\u6b21\u5143\u914d\u5217\u306e\u5ba3\u8a00\u3068\u540c\u6642\u306b\u521d\u671f\u5316\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u306a\u304a\u3001Arrays\u30af\u30e9\u30b9\u306edeepToString\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\u3068println\u30e1\u30bd\u30c3\u30c9\u3067\u591a\u6b21\u5143\u914d\u5217\u3092\u51fa\u529b\u8868\u793a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u306e\u3067\u4fbf\u5229\u3067\u3059\u3002<\/p>\n
\u914d\u5217\u306e\u5404\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3066\u521d\u671f\u5316\u3059\u308b\u65b9\u6cd5<\/h3>\n
\u914d\u5217\u306e\u5404\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u305f\u3081\u306b\u306f\u300c[ ]\u300d\u8a18\u53f7\u5185\u306b\u305d\u308c\u305e\u308c\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u756a\u53f7\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n
\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u3066\u5024\u3092\u4ee3\u5165\u3057\u307e\u3059\u3002<\/p>\n
\u914d\u5217\u540d[1\u6b21\u5143\u914d\u5217\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u756a\u53f7][1\u6b21\u5143\u914d\u5217\u5185\u306e\u8981\u7d20\u306e\u756a\u53f7] = \u5024;<\/pre>\n
for\u6587\u3092\u4f7f\u3063\u3066\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9\u3057\u307e\u3059\u3002<\/p>\n
\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
import java.util.Arrays;\r\n\r\npublic class Main {\r\n \r\n public static void main(String args[]) {\r\n \/\/ 1\u6b21\u5143\u914d\u5217\u306e\u6570\r\n int num = 3; \r\n \/\/ \u54041\u6b21\u5143\u914d\u5217\u306e\u8981\u7d20\u6570\u3092\u683c\u7d0d\u3057\u305f\u914d\u5217\r\n int[] nums = {3, 4, 5};\r\n \r\n \/\/ 2\u6b21\u5143\u914d\u5217\u306e\u5ba3\u8a00\r\n char[][] arr = new char[num][];\r\n for(int i = 0; i < num; i++) {\r\n arr[i] = new char[nums[i]];\r\n }\r\n \r\n \/\/ \u8981\u7d20\u306e\u4ee3\u5165\r\n for(int i = 0; i < num; i++) {\r\n for(int j = 0; j < nums[i]; j++) {\r\n arr[i][j] = (char)('a' + j);\r\n }\r\n }\r\n \r\n System.out.println(Arrays.deepToString(arr));\r\n }\r\n}<\/pre>\n\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
[[a, b, c], [a, b, c, d], [a, b, c, d, e]]<\/pre>\n
\u3053\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u306f\u3001char\u578b\u306e2\u6b21\u5143\u914d\u5217\u3092\u5ba3\u8a00\u3057\u3001for\u6587\u3092\u4f7f\u3063\u3066\u5404\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3066\u521d\u671f\u5316\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u591a\u6b21\u5143\u914d\u5217\u306e\u4f7f\u3044\u65b9<\/h2>\n
\u591a\u6b21\u5143\u914d\u5217\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u307f\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n
\u57fa\u672c\u7684\u306b2\u6b21\u5143\u914d\u5217\u306e\u5834\u5408\u3068\u8003\u3048\u65b9\u306f\u540c\u3058\u3067\u3059\u3002\u6b21\u5143\u6570\u306b\u3042\u308f\u305b\u3066\u300c[ ]\u300d\u8a18\u53f7\u306e\u6570\u304c\u5909\u308f\u308b\u3060\u3051\u3067\u3059\u3002<\/p>\n
\u8aac\u660e\u3092\u308f\u304b\u308a\u3084\u3059\u304f\u3059\u308b\u305f\u3081\u306b3\u6b21\u5143\u306e\u914d\u5217\u3067\u30013\u6b21\u5143\u306e\u8981\u7d20\u6570\u304c2\u30012\u6b21\u5143\u306e\u8981\u7d20\u6570\u304c3\u30011\u6b21\u5143\u306e\u8981\u7d20\u6570\u304c4\u306e\u591a\u6b21\u5143\u914d\u5217\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n
\u5ba3\u8a00<\/h3>\n
\u914d\u5217\u306e\u5ba3\u8a00\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
\u578b\u540d[][][] \u914d\u5217\u540d = new \u578b\u540d[2][3][4];<\/pre>\n
\u5ba3\u8a00\u3068\u540c\u6642\u306b\u521d\u671f\u5316\u3059\u308b\u65b9\u6cd5<\/h3>\n
\u5ba3\u8a00\u3068\u540c\u6642\u306b\u521d\u671f\u5316\u3059\u308b\u5834\u5408\u3001\u4ee5\u4e0b\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
import java.util.Arrays;\r\n\r\npublic class Main {\r\n \r\n public static void main(String args[]) {\r\n char[][][] arr = {{{'a', 'b', 'c', 'd'}, {'a', 'b', 'c', 'd'}, {'a', 'b', 'c', 'd'}}, \r\n {{'a', 'b', 'c', 'd'}, {'a', 'b', 'c', 'd'}, {'a', 'b', 'c', 'd'}}};\r\n \r\n System.out.println(Arrays.deepToString(arr));\r\n }\r\n}<\/pre>\n\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
[[[a, b, c, d], [a, b, c, d], [a, b, c, d]], [[a, b, c, d], [a, b, c, d], [a, b, c, d]]]<\/pre>\n
\u914d\u5217\u306e\u5404\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3066\u521d\u671f\u5316\u3059\u308b\u65b9\u6cd5<\/h3>\n
\u914d\u5217\u306e\u5404\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3066\u521d\u671f\u5316\u3059\u308b\u5834\u5408\u3001\u4ee5\u4e0b\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
import java.util.Arrays;\r\n\r\npublic class Main {\r\n \r\n public static void main(String args[]) {\r\n \/\/ 3\u6b21\u5143\u914d\u5217\u306e\u5ba3\u8a00\r\n char[][][] arr = new char[2][3][4];\r\n \r\n \/\/ \u8981\u7d20\u306e\u4ee3\u5165\r\n for(int i = 0; i < 2; i++) {\r\n for(int j = 0; j < 3; j++) {\r\n for(int k = 0; k < 4; k++) {\r\n arr[i][j][k] = (char)('a' + k);\r\n }\r\n }\r\n }\r\n \r\n System.out.println(Arrays.deepToString(arr));\r\n }\r\n}<\/pre>\n\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
[[[a, b, c, d], [a, b, c, d], [a, b, c, d]], [[a, b, c, d], [a, b, c, d], [a, b, c, d]]]<\/pre>\n
\u591a\u6b21\u5143\u914d\u5217\u306e\u9577\u3055<\/h2>\n
\u591a\u6b21\u5143\u914d\u5217\u306e\u9577\u3055(\u8981\u7d20\u6570)\u3092\u53d6\u5f97\u3059\u308b\u306b\u306f\u3001length\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n
\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n
\u914d\u5217\u540d[\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u756a\u53f7].length<\/pre>\n
\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
import java.util.Arrays;\r\n\r\npublic class Main {\r\n \r\n public static void main(String args[]) {\r\n \/\/ 3\u6b21\u5143\u914d\u5217\u306e\u5ba3\u8a00\r\n char[][][] arr = new char[2][3][4];\r\n \r\n \/\/ \u8981\u7d20\u306e\u4ee3\u5165\r\n for(int i = 0; i < 2; i++) {\r\n for(int j = 0; j < 3; j++) {\r\n for(int k = 0; k < 4; k++) {\r\n arr[i][j][k] = (char)('a' + k);\r\n }\r\n }\r\n }\r\n \r\n System.out.println(Arrays.deepToString(arr));\r\n \r\n System.out.println(\"3\u6b21\u5143\u306e\u914d\u5217\u9577\u3055\uff1a\" + arr.length);\r\n System.out.println(\"2\u6b21\u5143\u306e\u914d\u5217\u9577\u3055\uff1a\" + arr[0].length);\r\n System.out.println(\"1\u6b21\u5143\u306e\u914d\u5217\u9577\u3055\uff1a\" + arr[0][0].length);\r\n }\r\n}<\/pre>\n\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
[[[a, b, c, d], [a, b, c, d], [a, b, c, d]], [[a, b, c, d], [a, b, c, d], [a, b, c, d]]]\r\n3\u6b21\u5143\u306e\u914d\u5217\u9577\u3055\uff1a2\r\n2\u6b21\u5143\u306e\u914d\u5217\u9577\u3055\uff1a3\r\n1\u6b21\u5143\u306e\u914d\u5217\u9577\u3055\uff1a4<\/pre>\n
\u3053\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u306f\u3001length\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u5404\u6b21\u5143\u306e\u914d\u5217\u9577\u3055\u3092\u53d6\u5f97\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
3\u6b21\u5143\u914d\u5217arr\u3067\u306f\u3001arr\u3082arr[0]\u3082arr[0][0]\u3082\u914d\u5217\u3067\u3059\u306e\u3067length\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u3066\u914d\u5217\u9577\u3055\u3092\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u305f\u3060\u3057\u3001arr[0][0][0]\u306f\u914d\u5217\u3067\u306f\u306a\u304fchar\u578b\u306e\u5909\u6570\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
ArrayList\u3067\u4e8c\u6b21\u5143\u914d\u5217\u3092\u5ba3\u8a00\u3059\u308b\u65b9\u6cd5<\/h2>\n
Java\u3067\u306fArrayList\u30af\u30e9\u30b9\u3067\u3082\u914d\u5217\u3092\u6271\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
ArrayList\u30af\u30e9\u30b9\u3067\u4e8c\u6b21\u5143\u914d\u5217\u3092\u5ba3\u8a00\u3059\u308b\u306b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n
ArrayList<ArrayList<\u578b\u306e\u30e9\u30c3\u30d1\u30fc\u30af\u30e9\u30b9\u540d>> \u914d\u5217\u540d;<\/pre>\n
ArrayList\u30af\u30e9\u30b9\u3067\u4e8c\u6b21\u5143\u914d\u5217\u3092\u5ba3\u8a00\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u306f\u3001\u3053\u3061\u3089\u3067\u3082\u89e3\u8aac\u3057\u3066\u3044\u307e\u3059\u306e\u3067\u305c\u3072\u53c2\u8003\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n \n
- \u591a\u6b21\u5143\u914d\u5217\u306e\u4f7f\u3044\u65b9<\/b><\/li>\n
![](\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/08\/Java-ArrayToList-150x86.jpg\")
\n <\/div>\n ![](\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/01\/java_list_addall-150x86.jpg\")
\n <\/div>\n