{"id":152,"date":"2023-08-30T10:04:09","date_gmt":"2023-08-30T01:04:09","guid":{"rendered":"https:\/\/mumooinfo.com\/?p=152"},"modified":"2023-10-10T22:22:49","modified_gmt":"2023-10-10T13:22:49","slug":"java%ec%9d%98-map","status":"publish","type":"post","link":"https:\/\/mumooinfo.com\/programming\/java%ec%9d%98-map\/","title":{"rendered":"JAVA\uc758 Map"},"content":{"rendered":"\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n<div class=\"wp-block-image\">\r\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"533\" height=\"533\" class=\"wp-image-153 aligncenter\" src=\"https:\/\/mumooinfo.com\/wp-content\/uploads\/2023\/08\/\uc81c\ubaa9\uc744-\uc785\ub825\ud574\uc8fc\uc138\uc694_-001-2-2.jpg\" alt=\"\" srcset=\"https:\/\/mumooinfo.com\/wp-content\/uploads\/2023\/08\/\uc81c\ubaa9\uc744-\uc785\ub825\ud574\uc8fc\uc138\uc694_-001-2-2.jpg 533w, https:\/\/mumooinfo.com\/wp-content\/uploads\/2023\/08\/\uc81c\ubaa9\uc744-\uc785\ub825\ud574\uc8fc\uc138\uc694_-001-2-2-300x300.jpg 300w, https:\/\/mumooinfo.com\/wp-content\/uploads\/2023\/08\/\uc81c\ubaa9\uc744-\uc785\ub825\ud574\uc8fc\uc138\uc694_-001-2-2-150x150.jpg 150w\" sizes=\"(max-width: 533px) 100vw, 533px\" \/><\/figure><\/div>\r\n\r\n\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n<h2 class=\"wp-block-heading\">JAVA\uc758 Map<\/h2>\r\n\r\n\r\n\r\n<p>\uc790\ubc14\uc5d0\uc11c Map\uc740 \ud0a4\uc640 \uac12\uc758 \uc30d\uc744 \uc800\uc7a5\ud558\ub294 \uceec\ub809\uc158\uc785\ub2c8\ub2e4. \uac01 \ud0a4\ub294 \uace0\uc720\ud55c \uac12\uc744 \uac00\uc9c0\uba70, \ud574\ub2f9 \uac12\uc744 \uac80\uc0c9\ud558\uae30 \uc704\ud574 \ud0a4\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. Map\uc740 \uc790\ubc14 \uceec\ub809\uc158 \ud504\ub808\uc784\uc6cc\ud06c\uc758 \uc77c\ubd80\uc774\uba70, \uc0ac\uc804, \uc5f0\uad00 \ubc30\uc5f4 \ub4f1 \ub2e4\uc591\ud55c \uc0ac\uc6a9 \uc0ac\ub840\uc5d0 \ub300\ud55c \uad6c\ud604\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4. Map\uc740 \ud2b9\uc815 \uc2dd\ubcc4\uc790\ub85c \ub370\uc774\ud130\ub97c \uc800\uc7a5\ud558\uace0 \ud6a8\uc728\uc801\uc73c\ub85c \uac80\uc0c9\ud574\uc57c\ud558\ub294 \uc791\uc5c5\uc5d0 \ud544\uc218\uc801\uc785\ub2c8\ub2e4.<\/p>\r\n\r\n\r\n\r\n<p>&nbsp;<\/p>\r\n<center><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-4435445268668222\" crossorigin=\"anonymous\"><\/script> <!-- [\ub514\uc2a4\ud50c\ub808\uc774 \uad11\uace0] \ubc18\uc751\ud615 \uc6cc\ub4dc\ud504\ub808\uc2a4 \ubcf8\ubb38 --> <ins class=\"adsbygoogle\" style=\"display: block;\" data-ad-client=\"ca-pub-4435445268668222\" data-ad-slot=\"9091536397\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"><\/ins> <script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/center>\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Map \uc720\ud615<\/h3>\r\n\r\n\r\n\r\n<p>\uc790\ubc14\uc5d0\uc11c\ub294 \uc5ec\ub7ec Map \uc778\ud130\ud398\uc774\uc2a4 \uad6c\ud604\uc774 \uc788\uc73c\uba70, \uac01\uac01 \uace0\uc720\ud55c \ud2b9\uc131\uc744 \uac00\uc9c0\uace0 \uc788\uc2b5\ub2c8\ub2e4. \uc77c\ubc18\uc801\uc73c\ub85c \uc0ac\uc6a9\ub418\ub294 \uba87 \uac00\uc9c0\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\r\n\r\n\r\n\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n<h4 class=\"wp-block-heading\">HashMap<\/h4>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>\ubc84\ud0b7 \ubc30\uc5f4\uc744 \uc0ac\uc6a9\ud558\uc5ec \ud574\uc2dc \ud14c\uc774\ube14\uc744 \uad6c\ud604\ud569\ub2c8\ub2e4.<\/li>\r\n\r\n\r\n\r\n<li>\uc0bd\uc785, \uac80\uc0c9 \ubc0f \uc0ad\uc81c \uc791\uc5c5\uc758 \ud3c9\uade0 \uc2dc\uac04 \ubcf5\uc7a1\ub3c4\uac00 \ube60\ub978 O(1)\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/li>\r\n\r\n\r\n\r\n<li>\uc694\uc18c\uc758 \ud2b9\uc815 \uc21c\uc11c\ub97c \ubcf4\uc7a5\ud558\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" style=\"font-size: .875rem; font-family: Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace; line-height: 1.25rem;\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\">\r\n<pre class=\"shiki nord\" style=\"background-color: #2e3440ff;\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #8fbcbb;\">Map<\/span><span style=\"color: #eceff4;\">&lt;<\/span><span style=\"color: #8fbcbb;\">String<\/span><span style=\"color: #eceff4;\">,<\/span> <span style=\"color: #8fbcbb;\">Integer<\/span><span style=\"color: #eceff4;\">&gt;<\/span> <span style=\"color: #d8dee9;\">hashMap<\/span> <span style=\"color: #81a1c1;\">=<\/span> <span style=\"color: #81a1c1;\">new<\/span> <span style=\"color: #8fbcbb;\">HashMap<\/span><span style=\"color: #eceff4;\">&lt;&gt;()<\/span><span style=\"color: #81a1c1;\">;<\/span><\/span>\r\n<span class=\"line\"><span style=\"color: #d8dee9;\">hashMap<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #88c0d0;\">put<\/span><span style=\"color: #eceff4;\">(<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #a3be8c;\">apple<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #eceff4;\">,<\/span> <span style=\"color: #b48ead;\">3<\/span><span style=\"color: #eceff4;\">)<\/span><span style=\"color: #81a1c1;\">;<\/span><\/span>\r\n<span class=\"line\"><span style=\"color: #d8dee9;\">hashMap<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #88c0d0;\">put<\/span><span style=\"color: #eceff4;\">(<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #a3be8c;\">banana<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #eceff4;\">,<\/span> <span style=\"color: #b48ead;\">2<\/span><span style=\"color: #eceff4;\">)<\/span><span style=\"color: #81a1c1;\">;<\/span><\/span>\r\n<span class=\"line\"><span style=\"color: #d8dee9;\">hashMap<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #88c0d0;\">put<\/span><span style=\"color: #eceff4;\">(<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #a3be8c;\">cherry<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #eceff4;\">,<\/span> <span style=\"color: #b48ead;\">5<\/span><span style=\"color: #eceff4;\">)<\/span><span style=\"color: #81a1c1;\">;<\/span><\/span>\r\n<span class=\"line\"><span style=\"color: #d8dee9;\">System<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #d8dee9;\">out<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #88c0d0;\">println<\/span><span style=\"color: #eceff4;\">(<\/span><span style=\"color: #d8dee9;\">hashMap<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #88c0d0;\">get<\/span><span style=\"color: #eceff4;\">(<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #a3be8c;\">banana<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #eceff4;\">))<\/span><span style=\"color: #81a1c1;\">;<\/span> <span style=\"color: #616e88;\">\/\/ Output: 2<\/span><\/span><\/code><\/pre>\r\n<\/div>\r\n\r\n\r\n\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n<h4 class=\"wp-block-heading\">LinkedHashMap<\/h4>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>HashMap\uc744 \ud655\uc7a5\ud558\uace0 \uc0bd\uc785 \uc21c\uc11c\ub97c \uc720\uc9c0\ud569\ub2c8\ub2e4.<\/li>\r\n\r\n\r\n\r\n<li>\uc0bd\uc785, \uac80\uc0c9 \ubc0f \uc0ad\uc81c \uc791\uc5c5\uc758 \ud3c9\uade0 \uc2dc\uac04 \ubcf5\uc7a1\ub3c4\uac00 \ube60\ub978 O(1)\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/li>\r\n\r\n\r\n\r\n<li>\uc0bd\uc785 \uc21c\uc11c\ub97c \ubcf4\uc874\ud574\uc57c \ud560 \ub54c \uc801\ud569\ud569\ub2c8\ub2e4.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" style=\"font-size: .875rem; font-family: Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace; line-height: 1.25rem;\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\">\r\n<pre class=\"shiki nord\" style=\"background-color: #2e3440ff;\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #8fbcbb;\">Map<\/span><span style=\"color: #eceff4;\">&lt;<\/span><span style=\"color: #8fbcbb;\">String<\/span><span style=\"color: #eceff4;\">,<\/span> <span style=\"color: #8fbcbb;\">Integer<\/span><span style=\"color: #eceff4;\">&gt;<\/span> <span style=\"color: #d8dee9;\">linkedHashMap<\/span> <span style=\"color: #81a1c1;\">=<\/span> <span style=\"color: #81a1c1;\">new<\/span> <span style=\"color: #8fbcbb;\">LinkedHashMap<\/span><span style=\"color: #eceff4;\">&lt;&gt;()<\/span><span style=\"color: #81a1c1;\">;<\/span><\/span>\r\n<span class=\"line\"><span style=\"color: #d8dee9;\">linkedHashMap<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #88c0d0;\">put<\/span><span style=\"color: #eceff4;\">(<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #a3be8c;\">apple<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #eceff4;\">,<\/span> <span style=\"color: #b48ead;\">3<\/span><span style=\"color: #eceff4;\">)<\/span><span style=\"color: #81a1c1;\">;<\/span><\/span>\r\n<span class=\"line\"><span style=\"color: #d8dee9;\">linkedHashMap<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #88c0d0;\">put<\/span><span style=\"color: #eceff4;\">(<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #a3be8c;\">banana<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #eceff4;\">,<\/span> <span style=\"color: #b48ead;\">2<\/span><span style=\"color: #eceff4;\">)<\/span><span style=\"color: #81a1c1;\">;<\/span><\/span>\r\n<span class=\"line\"><span style=\"color: #d8dee9;\">linkedHashMap<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #88c0d0;\">put<\/span><span style=\"color: #eceff4;\">(<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #a3be8c;\">cherry<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #eceff4;\">,<\/span> <span style=\"color: #b48ead;\">5<\/span><span style=\"color: #eceff4;\">)<\/span><span style=\"color: #81a1c1;\">;<\/span><\/span>\r\n<span class=\"line\"><span style=\"color: #d8dee9;\">System<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #d8dee9;\">out<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #88c0d0;\">println<\/span><span style=\"color: #eceff4;\">(<\/span><span style=\"color: #d8dee9;\">linkedHashMap<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #88c0d0;\">keySet<\/span><span style=\"color: #eceff4;\">())<\/span><span style=\"color: #81a1c1;\">;<\/span> <span style=\"color: #616e88;\">\/\/ Output: [apple, banana, cherry]<\/span><\/span><\/code><\/pre>\r\n<\/div>\r\n\r\n\r\n\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n<h4 class=\"wp-block-heading\">TreeMap<\/h4>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>Red-Black \ud2b8\ub9ac\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc694\uc18c\ub97c \uc800\uc7a5\ud569\ub2c8\ub2e4.<\/li>\r\n\r\n\r\n\r\n<li>\uc790\uc5f0 \uc21c\uc11c\ub098 \uc81c\uacf5\ub41c \ube44\uad50\uc790\ub97c \uae30\ubc18\uc73c\ub85c \uc815\ub82c\ub41c \uc21c\uc11c\ub85c \uc694\uc18c\ub97c \uc720\uc9c0\ud569\ub2c8\ub2e4.<\/li>\r\n\r\n\r\n\r\n<li>\uc0bd\uc785, \uac80\uc0c9 \ubc0f \uc0ad\uc81c \uc791\uc5c5\uc758 \uc2dc\uac04 \ubcf5\uc7a1\ub3c4\ub294 O(log n)\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" style=\"font-size: .875rem; font-family: Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace; line-height: 1.25rem;\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\">\r\n<pre class=\"shiki nord\" style=\"background-color: #2e3440ff;\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #8fbcbb;\">Map<\/span><span style=\"color: #eceff4;\">&lt;<\/span><span style=\"color: #8fbcbb;\">String<\/span><span style=\"color: #eceff4;\">,<\/span> <span style=\"color: #8fbcbb;\">Integer<\/span><span style=\"color: #eceff4;\">&gt;<\/span> <span style=\"color: #d8dee9;\">treeMap<\/span> <span style=\"color: #81a1c1;\">=<\/span> <span style=\"color: #81a1c1;\">new<\/span> <span style=\"color: #8fbcbb;\">TreeMap<\/span><span style=\"color: #eceff4;\">&lt;&gt;()<\/span><span style=\"color: #81a1c1;\">;<\/span><\/span>\r\n<span class=\"line\"><span style=\"color: #d8dee9;\">treeMap<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #88c0d0;\">put<\/span><span style=\"color: #eceff4;\">(<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #a3be8c;\">apple<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #eceff4;\">,<\/span> <span style=\"color: #b48ead;\">3<\/span><span style=\"color: #eceff4;\">)<\/span><span style=\"color: #81a1c1;\">;<\/span><\/span>\r\n<span class=\"line\"><span style=\"color: #d8dee9;\">treeMap<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #88c0d0;\">put<\/span><span style=\"color: #eceff4;\">(<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #a3be8c;\">banana<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #eceff4;\">,<\/span> <span style=\"color: #b48ead;\">2<\/span><span style=\"color: #eceff4;\">)<\/span><span style=\"color: #81a1c1;\">;<\/span><\/span>\r\n<span class=\"line\"><span style=\"color: #d8dee9;\">treeMap<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #88c0d0;\">put<\/span><span style=\"color: #eceff4;\">(<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #a3be8c;\">cherry<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #eceff4;\">,<\/span> <span style=\"color: #b48ead;\">5<\/span><span style=\"color: #eceff4;\">)<\/span><span style=\"color: #81a1c1;\">;<\/span><\/span>\r\n<span class=\"line\"><span style=\"color: #d8dee9;\">System<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #d8dee9;\">out<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #88c0d0;\">println<\/span><span style=\"color: #eceff4;\">(<\/span><span style=\"color: #d8dee9;\">treeMap<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #88c0d0;\">entrySet<\/span><span style=\"color: #eceff4;\">())<\/span><span style=\"color: #81a1c1;\">;<\/span> <span style=\"color: #616e88;\">\/\/ Output: [apple=3, banana=2, cherry=5]<\/span><\/span><\/code><\/pre>\r\n<\/div>\r\n\r\n\r\n\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n<h4 class=\"wp-block-heading\">HashTable<\/h4>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>HashMap\uacfc \uc720\uc0ac\ud558\uc9c0\ub9cc \ub3d9\uae30\ud654\ub429\ub2c8\ub2e4(\uc2a4\ub808\ub4dc \uc548\uc804).<\/li>\r\n\r\n\r\n\r\n<li>\uba54\uc11c\ub4dc\uc5d0 \ub300\ud55c \ub3d9\uae30\ud654\ub41c \uc561\uc138\uc2a4\ub97c \uc81c\uacf5\ud558\uc5ec \uc2a4\ub808\ub4dc \uc548\uc804\uc131\uc744 \ubcf4\uc7a5\ud569\ub2c8\ub2e4.<\/li>\r\n\r\n\r\n\r\n<li>\uc77c\ubc18\uc801\uc73c\ub85c \uc804\uc5ed \ub3d9\uae30\ud654\ub85c \uc778\ud574 ConcurrentHashMap\uc5d0 \ube44\ud574 \ud6a8\uc728\uc774 \ub5a8\uc5b4\uc9d1\ub2c8\ub2e4.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" style=\"font-size: .875rem; font-family: Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace; line-height: 1.25rem;\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\">\r\n<pre class=\"shiki nord\" style=\"background-color: #2e3440ff;\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #8fbcbb;\">Map<\/span><span style=\"color: #eceff4;\">&lt;<\/span><span style=\"color: #8fbcbb;\">String<\/span><span style=\"color: #eceff4;\">,<\/span> <span style=\"color: #8fbcbb;\">Integer<\/span><span style=\"color: #eceff4;\">&gt;<\/span> <span style=\"color: #d8dee9;\">hashTable<\/span> <span style=\"color: #81a1c1;\">=<\/span> <span style=\"color: #81a1c1;\">new<\/span> <span style=\"color: #8fbcbb;\">Hashtable<\/span><span style=\"color: #eceff4;\">&lt;&gt;()<\/span><span style=\"color: #81a1c1;\">;<\/span><\/span>\r\n<span class=\"line\"><span style=\"color: #d8dee9;\">hashTable<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #88c0d0;\">put<\/span><span style=\"color: #eceff4;\">(<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #a3be8c;\">apple<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #eceff4;\">,<\/span> <span style=\"color: #b48ead;\">3<\/span><span style=\"color: #eceff4;\">)<\/span><span style=\"color: #81a1c1;\">;<\/span><\/span>\r\n<span class=\"line\"><span style=\"color: #d8dee9;\">hashTable<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #88c0d0;\">put<\/span><span style=\"color: #eceff4;\">(<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #a3be8c;\">banana<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #eceff4;\">,<\/span> <span style=\"color: #b48ead;\">2<\/span><span style=\"color: #eceff4;\">)<\/span><span style=\"color: #81a1c1;\">;<\/span><\/span>\r\n<span class=\"line\"><span style=\"color: #d8dee9;\">hashTable<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #88c0d0;\">put<\/span><span style=\"color: #eceff4;\">(<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #a3be8c;\">cherry<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #eceff4;\">,<\/span> <span style=\"color: #b48ead;\">5<\/span><span style=\"color: #eceff4;\">)<\/span><span style=\"color: #81a1c1;\">;<\/span><\/span>\r\n<span class=\"line\"><span style=\"color: #d8dee9;\">System<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #d8dee9;\">out<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #88c0d0;\">println<\/span><span style=\"color: #eceff4;\">(<\/span><span style=\"color: #d8dee9;\">hashTable<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #88c0d0;\">containsValue<\/span><span style=\"color: #eceff4;\">(<\/span><span style=\"color: #b48ead;\">2<\/span><span style=\"color: #eceff4;\">))<\/span><span style=\"color: #81a1c1;\">;<\/span> <span style=\"color: #616e88;\">\/\/ Output: true<\/span><\/span><\/code><\/pre>\r\n<\/div>\r\n\r\n\r\n\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n<h4 class=\"wp-block-heading\">ConcurrentHashMap<\/h4>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>\uace0\ub3c4\uc758 \ub3d9\uc2dc\uc131 \ubc0f \uc2a4\ub808\ub4dc \uc548\uc804\uc131\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/li>\r\n\r\n\r\n\r\n<li>\ub370\uc774\ud130\ub97c \uc138\uadf8\uba3c\ud2b8\ub85c \ubd84\ud560\ud558\uc5ec \uc5ec\ub7ec \uc2a4\ub808\ub4dc\uac00 \ub2e4\ub978 \uc138\uadf8\uba3c\ud2b8\uc5d0\uc11c \ub3d9\uc2dc\uc5d0 \uc791\uc5c5\ud560 \uc218 \uc788\ub3c4\ub85d \ud569\ub2c8\ub2e4.<\/li>\r\n\r\n\r\n\r\n<li>ConcurrentHashMap\uc5d0 \ube44\ud574 \ub3d9\uc2dc \uc2dc\ub098\ub9ac\uc624\uc5d0 \ub300\ud574 \ub354 \ub098\uc740 \uc131\ub2a5\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" style=\"font-size: .875rem; font-family: Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace; line-height: 1.25rem;\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\">\r\n<pre class=\"shiki nord\" style=\"background-color: #2e3440ff;\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #8fbcbb;\">Map<\/span><span style=\"color: #eceff4;\">&lt;<\/span><span style=\"color: #8fbcbb;\">String<\/span><span style=\"color: #eceff4;\">,<\/span> <span style=\"color: #8fbcbb;\">Integer<\/span><span style=\"color: #eceff4;\">&gt;<\/span> <span style=\"color: #d8dee9;\">concurrentHashMap<\/span> <span style=\"color: #81a1c1;\">=<\/span> <span style=\"color: #81a1c1;\">new<\/span> <span style=\"color: #8fbcbb;\">ConcurrentHashMap<\/span><span style=\"color: #eceff4;\">&lt;&gt;()<\/span><span style=\"color: #81a1c1;\">;<\/span><\/span>\r\n<span class=\"line\"><span style=\"color: #d8dee9;\">concurrentHashMap<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #88c0d0;\">put<\/span><span style=\"color: #eceff4;\">(<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #a3be8c;\">apple<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #eceff4;\">,<\/span> <span style=\"color: #b48ead;\">3<\/span><span style=\"color: #eceff4;\">)<\/span><span style=\"color: #81a1c1;\">;<\/span><\/span>\r\n<span class=\"line\"><span style=\"color: #d8dee9;\">concurrentHashMap<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #88c0d0;\">put<\/span><span style=\"color: #eceff4;\">(<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #a3be8c;\">banana<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #eceff4;\">,<\/span> <span style=\"color: #b48ead;\">2<\/span><span style=\"color: #eceff4;\">)<\/span><span style=\"color: #81a1c1;\">;<\/span><\/span>\r\n<span class=\"line\"><span style=\"color: #d8dee9;\">concurrentHashMap<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #88c0d0;\">put<\/span><span style=\"color: #eceff4;\">(<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #a3be8c;\">cherry<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #eceff4;\">,<\/span> <span style=\"color: #b48ead;\">5<\/span><span style=\"color: #eceff4;\">)<\/span><span style=\"color: #81a1c1;\">;<\/span><\/span>\r\n<span class=\"line\"><span style=\"color: #d8dee9;\">System<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #d8dee9;\">out<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #88c0d0;\">println<\/span><span style=\"color: #eceff4;\">(<\/span><span style=\"color: #d8dee9;\">concurrentHashMap<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #88c0d0;\">containsKey<\/span><span style=\"color: #eceff4;\">(<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #a3be8c;\">orange<\/span><span style=\"color: #eceff4;\">\"<\/span><span style=\"color: #eceff4;\">))<\/span><span style=\"color: #81a1c1;\">;<\/span> <span style=\"color: #616e88;\">\/\/ Output: false<\/span><\/span><\/code><\/pre>\r\n<\/div>\r\n\r\n\r\n\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">\uc77c\ubc18\uc801\uc778 Map \uc791\uc5c5<\/h3>\r\n\r\n\r\n\r\n<h4 class=\"wp-block-heading\">\uc694\uc18c \ucd94\uac00<\/h4>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>put(key, value) \uba54\uc11c\ub4dc\ub97c \uc0ac\uc6a9\ud558\uc5ec \ud0a4\uc640 \uac12\uc758 \uc30d\uc744 \ub9f5\uc5d0 \ucd94\uac00\ud569\ub2c8\ub2e4.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h4 class=\"wp-block-heading\">\uc694\uc18c \uac80\uc0c9<\/h4>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>get(key) \uba54\uc11c\ub4dc\ub97c \uc0ac\uc6a9\ud558\uc5ec \ud2b9\uc815 \ud0a4\uc640 \uc5f0\uacb0\ub41c \uac12\uc744 \uac80\uc0c9\ud569\ub2c8\ub2e4.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h4 class=\"wp-block-heading\">\uc694\uc18c\uc758 \uc874\uc7ac \uc720\ubb34 \ud655\uc778<\/h4>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>containsKey(key) \uba54\uc11c\ub4dc\ub97c \uc0ac\uc6a9\ud558\uc5ec \ud0a4\uac00 \ub9f5\uc5d0 \uc788\ub294\uc9c0 \ud655\uc778\ud569\ub2c8\ub2e4.<\/li>\r\n\r\n\r\n\r\n<li>containsValue(value) \uba54\uc11c\ub4dc\ub97c \uc0ac\uc6a9\ud558\uc5ec \uac12\uc774 \ub9f5\uc5d0 \uc788\ub294\uc9c0 \ud655\uc778\ud569\ub2c8\ub2e4.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h4 class=\"wp-block-heading\">\uc694\uc18c \uc5c5\ub370\uc774\ud2b8<\/h4>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>\uae30\uc874 \ud0a4\ub85c \uac12\uc744 \ub123\uc73c\uba74 \uac12\uc774 \uc5c5\ub370\uc774\ud2b8\ub429\ub2c8\ub2e4.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h4 class=\"wp-block-heading\">\uc694\uc18c \uc81c\uac70<\/h4>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>remove(key) \uba54\uc11c\ub4dc\ub97c \uc0ac\uc6a9\ud558\uc5ec \ud0a4-\uac12 \uc30d\uc744 \ub9f5\uc5d0\uc11c \uc81c\uac70\ud569\ub2c8\ub2e4.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h4 class=\"wp-block-heading\">\ub9f5 \ubc18\ubcf5<\/h4>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>for-each \ub8e8\ud504\ub098 \ubc18\ubcf5\uc790\ub97c \uc0ac\uc6a9\ud558\uc5ec \ub9f5\uc758 \uc5d4\ud2b8\ub9ac(\ud0a4-\uac12 \uc30d)\ub97c \ubc18\ubcf5\ud569\ub2c8\ub2e4.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h4 class=\"wp-block-heading\">\ud0a4\uc640 \uac12 \uac00\uc838\uc624\uae30<\/h4>\r\n\r\n\r\n\r\n<ul class=\"wp-block-list\">\r\n<li>keySet()\uc740 \ubaa8\ub4e0 \ud0a4\uc758 \uc9d1\ud569\uc744 \uac00\uc838\uc635\ub2c8\ub2e4.<\/li>\r\n\r\n\r\n\r\n<li>values()\ub294 \ubaa8\ub4e0 \uac12\uc744 \uac00\uc838\uc624\ub294 \uceec\ub809\uc158\uc744 \uac00\uc838\uc635\ub2c8\ub2e4.<\/li>\r\n\r\n\r\n\r\n<li>entrySet()\uc740 \ubaa8\ub4e0 \ud0a4-\uac12 \uc30d\uc758 \uc9d1\ud569\uc744 \uac00\uc838\uc635\ub2c8\ub2e4.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<p>&nbsp;<\/p>\r\n<center><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-4435445268668222\" crossorigin=\"anonymous\"><\/script> <!-- [\ub514\uc2a4\ud50c\ub808\uc774 \uad11\uace0] \ubc18\uc751\ud615 \uc6cc\ub4dc\ud504\ub808\uc2a4 \ubcf8\ubb38 --> <ins class=\"adsbygoogle\" style=\"display: block;\" data-ad-client=\"ca-pub-4435445268668222\" data-ad-slot=\"9091536397\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"><\/ins> <script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/center>\r\n<p>&nbsp;<\/p>\r\n\r\n<p>&nbsp;<\/p>\r\n\r\n<p>\uc790\ubc14\uc5d0\uc11c \ub9f5\uc740 \ud0a4-\uac12 \uc30d\uc744 \ud6a8\uc728\uc801\uc73c\ub85c \uc800\uc7a5\ud558\uace0 \uad00\ub9ac\ud560 \uc218 \uc788\ub294 \ub2e4\uc6a9\ub3c4 \ub370\uc774\ud130 \uad6c\uc870\uc785\ub2c8\ub2e4. HashMap, LinkedHashMap, TreeMap, HashTable \ubc0f ConcurrentHashMap\uacfc \uac19\uc740 \ub2e4\uc591\ud55c \uad6c\ud604 \uc911\uc5d0\uc11c \uc120\ud0dd\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uad6c\ud604\uc740 \uc131\ub2a5, \uc21c\uc11c \ubcf4\uc874 \uc5ec\ubd80 \ubc0f \uc2a4\ub808\ub4dc \uc548\uc804\uc131 \uce21\uba74\uc5d0\uc11c \ub2e4\uc591\ud55c \ud2b8\ub808\uc774\ub4dc\uc624\ud504\ub97c \uc81c\uacf5\ud569\ub2c8\ub2e4. \uac01 \uad6c\ud604\uc758 \ud2b9\uc131\uc744 \uc774\ud574\ud558\uba74 \uc790\ubc14 \uc751\uc6a9 \ud504\ub85c\uadf8\ub7a8\uc5d0\uc11c \ub9f5\uc744 \uc0ac\uc6a9\ud560 \ub54c \uc815\ubcf4\ub97c \uae30\ubc18\uc73c\ub85c \ub354 \ub098\uc740 \uacb0\uc815\uc744 \ub0b4\ub9b4 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\r\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; &nbsp; JAVA\uc758 Map \uc790\ubc14\uc5d0\uc11c Map\uc740 \ud0a4\uc640 \uac12\uc758 \uc30d\uc744 \uc800\uc7a5\ud558\ub294 &#8230;<\/p>\n","protected":false},"author":1,"featured_media":153,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rank_math_lock_modified_date":false,"footnotes":""},"categories":[2],"tags":[],"class_list":["post-152","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-programming"],"_links":{"self":[{"href":"https:\/\/mumooinfo.com\/wp-json\/wp\/v2\/posts\/152"}],"collection":[{"href":"https:\/\/mumooinfo.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mumooinfo.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mumooinfo.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mumooinfo.com\/wp-json\/wp\/v2\/comments?post=152"}],"version-history":[{"count":3,"href":"https:\/\/mumooinfo.com\/wp-json\/wp\/v2\/posts\/152\/revisions"}],"predecessor-version":[{"id":505,"href":"https:\/\/mumooinfo.com\/wp-json\/wp\/v2\/posts\/152\/revisions\/505"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mumooinfo.com\/wp-json\/wp\/v2\/media\/153"}],"wp:attachment":[{"href":"https:\/\/mumooinfo.com\/wp-json\/wp\/v2\/media?parent=152"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mumooinfo.com\/wp-json\/wp\/v2\/categories?post=152"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mumooinfo.com\/wp-json\/wp\/v2\/tags?post=152"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}