{"id":154,"date":"2017-01-17T16:00:00","date_gmt":"2017-01-17T07:00:00","guid":{"rendered":"https:\/\/java-code.jp\/?p=154"},"modified":"2020-02-18T14:37:29","modified_gmt":"2020-02-18T05:37:29","slug":"%e3%82%b8%e3%82%a7%e3%83%8d%e3%83%aa%e3%83%83%e3%82%af%e3%82%b9%e3%81%ae%e5%ae%9a%e7%be%a9","status":"publish","type":"post","link":"https:\/\/java-code.jp\/154","title":{"rendered":"\u30b8\u30a7\u30cd\u30ea\u30c3\u30af\u30b9\u306e\u5b9a\u7fa9"},"content":{"rendered":"<p>\u30b8\u30a7\u30cd\u30ea\u30c3\u30af\u30b9\u306b\u5bfe\u5fdc\u3057\u305f\u578b\u3092\u3001\u81ea\u5206\u3067\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001HashMap\u30af\u30e9\u30b9\uff08java.util\u30d1\u30c3\u30b1\u30fc\u30b8\uff09\u306e\u30b3\u30fc\u30c9\u3092\u629c\u7c8b\u3057\u305f\u3082\u306e\u3067\u3059\u3002<\/p>\n<div class=\"pre\">\n<pre class=\"brush:java;highlight:[1,4];\">\r\npublic class HashMap&lt;K,V> \uff5e {\r\n  transient Entry&lt;K,V>[] table;\r\n\r\n  public V put(K key, V value) {\r\n    ...\r\n  }\r\n}\r\n<\/pre>\n<p><!-- \/ .pre --><\/div>\n<p>\u30b8\u30a7\u30cd\u30ea\u30c3\u30af\u5bfe\u5fdc\u306e\u30af\u30e9\u30b9\u3067\u306f\u3001\u30af\u30e9\u30b9\u540d\u306b\u3082\u53d7\u3051\u53d6\u308b\u305f\u3081\u306e\u578b\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u6307\u5b9a\u3057\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002HashMap\u306e\u4f8b\u3067\u3042\u308c\u3070\u300cHashMap&lt;K,V&gt;\u300d\u306e\u90e8\u5206\u3067\u3059\u3002\u3053\u308c\u3067K\u3001V\u3068\u3044\u30462\u3064\u306e\u578b\uff08\u3053\u306e\u5834\u5408\u3067\u3042\u308c\u3070\u3001\u30ad\u30fc\u3068\u5024\u306e\u578b\uff09\u3092\u53d7\u3051\u53d6\u308c\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002<br \/>\n\u578b\u30d1\u30e9\u30e1\u30fc\u30bf\u306f\u3001\u6163\u4f8b\u7684\u306b\u5927\u6587\u5b57\u4e00\u6587\u5b57\u3067\u8868\u3059\u306e\u304c\u666e\u901a\u3067\u3059\u3002E\uff08\u8981\u7d20\uff09\u3001K\uff08\u30ad\u30fc\uff09\u3001V\uff08\u5024\uff09\u306a\u3069\u304c\u826f\u304f\u4f7f\u308f\u308c\u307e\u3059\u3002<br \/>\n\u578b\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u306f\u3001\u4ee5\u4e0b\u306e\u5834\u6240\u304b\u3089\u53c2\u7167\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\n\t\u30fb\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30f3\u30d0\u30fc\uff08static\u4fee\u98fe\u5b50\u306e\u4ed8\u304b\u306a\u3044\u30e1\u30f3\u30d0\u30fc\uff09\u306e\u5f15\u6570<br \/>\n\t\u30fb\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30f3\u30d0\u30fc\u306e\u623b\u308a\u5024\u578b<br \/>\n\t\u30fb\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30f3\u30d0\u30fc\u914d\u4e0b\u306e\u30ed\u30fc\u30ab\u30eb\u5909\u6570\n<\/p>\n<p><em class=\"ccenterContents01 ma50\">\u5883\u754c\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u578b<\/em><\/p>\n<p>\u30b8\u30a7\u30cd\u30ea\u30c3\u30af\u30b9\u3092\u5229\u7528\u3059\u308b\u969b\u306b\u3001<span>\u4e0d\u5909<\/span>\u3068\u3044\u3046\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u62bc\u3055\u3048\u3066\u304a\u304f\u3053\u3068\u306f\u91cd\u8981\u3067\u3059\u3002\u305f\u3068\u3048\u3070\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u306f\u3001\u30b8\u30a7\u30cd\u30ea\u30c3\u30af\u30b9\u306e\u4e16\u754c\u3067\u306f\u4e0d\u53ef\u3067\u3059\u3002<\/p>\n<div class=\"pre\">\n<pre class=\"brush:java;highlight:[1,4];\">\r\nList&lt;Number> list = new ArrayList&lt;Long>();\r\n<\/pre>\n<p><!-- \/ .pre --><\/div>\n<p>Number\u30af\u30e9\u30b9\u306fLong\u30af\u30e9\u30b9\u306e\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u3067\u3059\u304c\u3001\u30b8\u30a7\u30cd\u30ea\u30c3\u30af\u30b9\u3067\u306f\u3053\u306e\u3088\u3046\u306a\u5e83\u3044\u578b\u304b\u3089\u72ed\u3044\u578b\u3078\u306e\u5909\u63db\u3082\u8a31\u53ef\u3057\u307e\u305b\u3093\u3002\u578b\u306e\u4e00\u81f4\u3092\u53b3\u5bc6\u306b\u30c1\u30a7\u30c3\u30af\u3059\u308b\u306e\u3067\u3059\uff08\u4e0d\u5909\u306e\u610f\u5473\u3067\u3059\uff09\u3002<br \/>\n  \u3057\u304b\u3057\u3001\u3053\u308c\u306f\u53b3\u5bc6\u306b\u3059\u304e\u3066\u4f7f\u3044\u306b\u304f\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u3053\u3067\u3082\u3046\u5c11\u3057\u5e45\u3092\u6301\u3063\u305f\u578b\u306e\u6307\u5b9a\u3092\u53ef\u80fd\u306b\u3057\u305f\u306e\u304c\u3001<span>\u5883\u754c\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u578b<\/span>\u3067\u3059\u3002\u5883\u754c\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u578b\u3067\u306f\u3001&lt;? extends E&gt;\u306e\u5f62\u5f0f\u3067\u578b\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u3063\u3066\u3001\u578bE\u3068\u3001\u305d\u306e\u6d3e\u751f\u30af\u30e9\u30b9\u3092\u8a8d\u3081\u308b\u3068\u3044\u3046\u610f\u5473\u306b\u306a\u308a\u307e\u3059\u3002<br \/>\n  \u4f8b\u3048\u3070\u4ee5\u4e0b\u306f\u3001ArrayList\u30af\u30e9\u30b9\u306eaddAll\u30e1\u30bd\u30c3\u30c9\u306e\u4f8b\u3067\u3059\uff08addAll\u306f\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u914d\u5217\u306b\u8ffd\u52a0\u3057\u307e\u3059\uff09\u3002\n<\/p>\n<div class=\"pre\">\n<pre class=\"brush:java;highlight:[1,4];\">\r\npublic boolean addAll(Collection&lt;? extends E> c) {...}\r\n<\/pre>\n<p><!-- \/ .pre --><\/div>\n<p>\u5883\u754c\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u578b\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u305f\u3068\u3048\u3070ArrayList<Number>\u578b\u306eaddAll\u30e1\u30bd\u30c3\u30c9\u306b\u5bfe\u3057\u3066\u3001List<Long>\u578b\u306e\u5024\u3092\u6e21\u3059\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p><em class=\"note\"><img loading=\"lazy\" decoding=\"async\" src=\"wp-content\/themes\/Javacord\/images\/common\/image07.gif\" alt=\"note\" width=\"118\" height=\"32\"><\/em><\/p>\n<p class=\"ccenterNote\"><strong>\u4e0b\u9650\u5883\u754c\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9<\/strong><br \/>\n\u672c\u6587\u3067\u793a\u3057\u305f\u5883\u754c\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u578b\u306f\u3001\u6307\u5b9a\u3055\u308c\u305f\u578b\u3092\u4e0a\u9650\u306b\u3001\u305d\u306e\u6d3e\u751f\u30af\u30e9\u30b9\u3092\u8a31\u5bb9\u3059\u308b\u3053\u3068\u304b\u3089<span>\u4e0a\u9650\u5883\u754c\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u578b<\/span>\u3068\u3082\u547c\u3073\u307e\u3059\u3002\u4e00\u65b9\u3001\uff08\u305d\u308c\u307b\u3069\u5229\u7528\u983b\u5ea6\u306f\u304a\u304a\u304f\u306a\u3044\u3082\u306e\u306e\uff09\u6307\u5b9a\u3055\u308c\u305f\u578b\u3092\u4e0b\u9650\u306b\u3001\u305d\u306e\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u3092\u8a31\u5bb9\u3059\u308b<span>\u4e0b\u9650\u5883\u754c\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u578b<\/span>\u3082\u3042\u308a\u307e\u3059\u3002&lt;? super E&gt;\u306e\u3088\u3046\u306b\u3001super\u30ad\u30fc\u30ef\u30fc\u30c9\u3067\u8868\u3057\u307e\u3059\u3002<\/p>\n<p>\n<span>\u95a2\u9023\u30da\u30fc\u30b8<\/span><br \/>\n<br \/>\n<a href=\"\/236\" target=\"_self\">ArrayList<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30b8\u30a7\u30cd\u30ea\u30c3\u30af\u30b9\u306b\u5bfe\u5fdc\u3057\u305f\u578b\u3092\u3001\u81ea\u5206\u3067\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001HashMap\u30af\u30e9\u30b9\uff08java.util\u30d1\u30c3\u30b1\u30fc\u30b8\uff09\u306e\u30b3\u30fc\u30c9\u3092\u629c\u7c8b\u3057\u305f\u3082\u306e\u3067\u3059\u3002 public class HashMap&lt;K,V> \uff5e { tr [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-154","post","type-post","status-publish","format-standard","hentry","category-generics"],"_links":{"self":[{"href":"https:\/\/java-code.jp\/wp-json\/wp\/v2\/posts\/154"}],"collection":[{"href":"https:\/\/java-code.jp\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/java-code.jp\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/java-code.jp\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/java-code.jp\/wp-json\/wp\/v2\/comments?post=154"}],"version-history":[{"count":7,"href":"https:\/\/java-code.jp\/wp-json\/wp\/v2\/posts\/154\/revisions"}],"predecessor-version":[{"id":1406,"href":"https:\/\/java-code.jp\/wp-json\/wp\/v2\/posts\/154\/revisions\/1406"}],"wp:attachment":[{"href":"https:\/\/java-code.jp\/wp-json\/wp\/v2\/media?parent=154"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/java-code.jp\/wp-json\/wp\/v2\/categories?post=154"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/java-code.jp\/wp-json\/wp\/v2\/tags?post=154"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}