{"id":132,"date":"2023-08-27T22:22:18","date_gmt":"2023-08-27T13:22:18","guid":{"rendered":"https:\/\/blog.mumooinfo.com\/?p=132"},"modified":"2023-10-10T22:31:55","modified_gmt":"2023-10-10T13:31:55","slug":"java%ec%9d%98-collection","status":"publish","type":"post","link":"https:\/\/mumooinfo.com\/programming\/java%ec%9d%98-collection\/","title":{"rendered":"JAVA\uc758 Collection"},"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-133 aligncenter\" src=\"https:\/\/mumooinfo.com\/wp-content\/uploads\/2023\/08\/\uc81c\ubaa9\uc744-\uc785\ub825\ud574\uc8fc\uc138\uc694_-001-17.jpg\" alt=\"\" srcset=\"https:\/\/mumooinfo.com\/wp-content\/uploads\/2023\/08\/\uc81c\ubaa9\uc744-\uc785\ub825\ud574\uc8fc\uc138\uc694_-001-17.jpg 533w, https:\/\/mumooinfo.com\/wp-content\/uploads\/2023\/08\/\uc81c\ubaa9\uc744-\uc785\ub825\ud574\uc8fc\uc138\uc694_-001-17-300x300.jpg 300w, https:\/\/mumooinfo.com\/wp-content\/uploads\/2023\/08\/\uc81c\ubaa9\uc744-\uc785\ub825\ud574\uc8fc\uc138\uc694_-001-17-150x150.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\">\uceec\ub809\uc158(Collection)<\/h2>\r\n\r\n\r\n\r\n<p>Java\uc5d0\uc11c \uceec\ub809\uc158\uc740 \uac1d\uccb4 \uadf8\ub8f9\uc744 \uc800\uc7a5, \uc870\uc791 \ubc0f \uad00\ub9ac\ud558\uae30 \uc704\ud55c \uc778\ud130\ud398\uc774\uc2a4(\ucd94\uc0c1 \ub370\uc774\ud130 \uc720\ud615)\uc640 \ud074\ub798\uc2a4\ub97c \uc81c\uacf5\ud558\ub294 \ud504\ub808\uc784\uc6cc\ud06c\uc785\ub2c8\ub2e4. \uceec\ub809\uc158\uc740 \ubc30\uc5f4\uc744 \uc0ac\uc6a9\ud558\ub294 \uac83\uc5d0 \ube44\ud574 \uc694\uc18c \uadf8\ub8f9\uc744 \uc791\uc5c5\ud558\ub294 \ub370 \ub354 \uc720\uc5f0\ud558\uace0 \ud6a8\uc728\uc801\uc778 \ubc29\ubc95\uc744 \uc81c\uacf5\ud558\ubbc0\ub85c Java \ud504\ub85c\uadf8\ub798\ubc0d \uc5b8\uc5b4\uc758 \ud544\uc218\uc801\uc778 \ubd80\ubd84\uc785\ub2c8\ub2e4. JCF(Java Collections Framework)\ub294 \ub2e4\uc591\ud55c \uceec\ub809\uc158 \uad6c\ud604\uc744 \uc81c\uacf5\ud558\ub294 \uc778\ud130\ud398\uc774\uc2a4 \ubc0f \ud074\ub798\uc2a4 \uc138\ud2b8\uc785\ub2c8\ub2e4.<\/p>\r\n\r\n\r\n\r\n<p>Java \uceec\ub809\uc158 \ud504\ub808\uc784\uc6cc\ud06c\uc5d0\ub294 \ub2e4\uc591\ud55c \uc720\ud615\uc758 \uceec\ub809\uc158\uc744 \uc704\ud55c \uad6c\uc131 \uc694\uc18c \uc5ed\ud560\uc744 \ud558\ub294 \uc5ec\ub7ec \ud575\uc2ec \uc778\ud130\ud398\uc774\uc2a4\uc640 \ud074\ub798\uc2a4\uac00 \ud3ec\ud568\ub418\uc5b4 \uc788\uc2b5\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\">\uceec\ub809\uc158<\/h3>\r\n\r\n\r\n\r\n<p>\uceec\ub809\uc158 \uacc4\uce35 \uad6c\uc870\uc758 \ub8e8\ud2b8 \uc778\ud130\ud398\uc774\uc2a4\uc785\ub2c8\ub2e4. add, remove, size, isEmpty \ub4f1\uacfc \uac19\uc774 \ubaa8\ub4e0 \uceec\ub809\uc158\uc5d0 \uc788\uc5b4\uc57c \ud558\ub294 \uae30\ubcf8 \uba54\uc11c\ub4dc\ub97c \uc815\uc758\ud569\ub2c8\ub2e4.<\/p>\r\n\r\n\r\n\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">List<\/h3>\r\n\r\n\r\n\r\n<p>\uc694\uc18c\uc758 \uc21c\uc11c\uac00 \uc9c0\uc815\ub41c \uc21c\uc11c\ub97c \uc720\uc9c0\ud558\ub294 \uceec\ub809\uc158\uc785\ub2c8\ub2e4. \ubaa9\ub85d\uc740 \uc911\ubcf5 \uc694\uc18c\ub97c \ud5c8\uc6a9\ud558\uba70 \uc694\uc18c\ub294 \uc778\ub371\uc2a4\ub97c \ud1b5\ud574 \uc561\uc138\uc2a4\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc77c\ubc18\uc801\uc778 \uad6c\ud604\uc5d0\ub294 &#8216;ArrayList&#8217; \ubc0f &#8216;LinkedList&#8217;\uac00 \ud3ec\ud568\ub429\ub2c8\ub2e4.<\/p>\r\n\r\n\r\n\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Set<\/h3>\r\n\r\n\r\n\r\n<p>\uc911\ubcf5\ub41c \uc694\uc18c\ub97c \ud5c8\uc6a9\ud558\uc9c0 \uc54a\ub294 \uceec\ub809\uc158\uc785\ub2c8\ub2e4. \uc9d1\ud569\uc740 \uc885\uc885 \uc218\ud559\uc801 \uc9d1\ud569\uc744 \ub098\ud0c0\ub0b4\ub294 \ub370 \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \uc77c\ubc18\uc801\uc778 \uad6c\ud604\uc5d0\ub294 HashSet \ubc0f TreeSet\uc774 \ud3ec\ud568\ub429\ub2c8\ub2e4.<\/p>\r\n\r\n\r\n\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Map<\/h3>\r\n\r\n\r\n\r\n<p>\ud0a4\ub97c \uac12\uc5d0 \ub9e4\ud551\ud558\ub294 \uceec\ub809\uc158\uc785\ub2c8\ub2e4. \ub9f5\uc758 \uac01 \ud0a4\ub294 \uace0\uc720\ud574\uc57c \ud558\uba70 \ub2e8\uc77c \uac12\uacfc \uc5f0\uacb0\ub429\ub2c8\ub2e4. \uc77c\ubc18\uc801\uc778 \uad6c\ud604\uc5d0\ub294 HashMap \ubc0f TreeMap\uc774 \ud3ec\ud568\ub429\ub2c8\ub2e4.<\/p>\r\n\r\n\r\n\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Queue<\/h3>\r\n\r\n\r\n\r\n<p>\ucc98\ub9ac \uc804\uc5d0 \uc694\uc18c\ub97c \ubcf4\uad00\ud558\uae30 \uc704\ud574 \uc124\uacc4\ub41c \uceec\ub809\uc158\uc785\ub2c8\ub2e4. \ub300\uae30\uc5f4\uc740 FIFO(\uc120\uc785\uc120\ucd9c) \uc21c\uc11c\ub97c \ub530\ub985\ub2c8\ub2e4. \uc77c\ubc18\uc801\uc778 \uad6c\ud604\uc5d0\ub294 LinkedList \ubc0f \ub2e4\uc591\ud55c \uc6b0\uc120\uc21c\uc704 \ub300\uae30\uc5f4 \uad6c\ud604\uc774 \ud3ec\ud568\ub429\ub2c8\ub2e4.<\/p>\r\n\r\n\r\n\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n<h3 class=\"wp-block-heading\">Deque<\/h3>\r\n\r\n\r\n\r\n<p>&#8220;\uc774\uc911 \uc885\ub8cc \ub300\uae30\uc5f4&#8221;\uc744 \ub098\ud0c0\ub0c5\ub2c8\ub2e4. \uc591\ucabd \ub05d\uc5d0\uc11c \uc694\uc18c\ub97c \ucd94\uac00\ud558\uace0 \uc81c\uac70\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc77c\ubc18\uc801\uc778 \uad6c\ud604\uc5d0\ub294 ArrayDeque\uac00 \ud3ec\ud568\ub429\ub2c8\ub2e4.<\/p>\r\n\r\n\r\n\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n<p>\uc774\ub7ec\ud55c \uac01 \uc778\ud130\ud398\uc774\uc2a4\uc5d0\ub294 \ub2e4\uc591\ud55c \ud2b9\uc131\uacfc \uc131\ub2a5 \uade0\ud615\uc744 \uac16\ucd98 \uc5ec\ub7ec \uad6c\ud604\uc774 \uc788\uc73c\ubbc0\ub85c \uac1c\ubc1c\uc790\ub294 \ud2b9\uc815 \uc694\uad6c \uc0ac\ud56d\uc5d0 \ub530\ub77c \uc801\uc808\ud55c \uceec\ub809\uc158 \uc720\ud615\uc744 \uc120\ud0dd\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\r\n\r\n\r\n\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n<p>Java \uceec\ub809\uc158 \ud504\ub808\uc784\uc6cc\ud06c\ub294 \uceec\ub809\uc158\uc744 \uc870\uc791\ud558\uace0 \uc791\uc5c5\ud558\uae30 \uc704\ud55c \ub2e4\uc591\ud55c \uc815\uc801 \uba54\uc11c\ub4dc\ub97c \uc81c\uacf5\ud558\ub294 &#8216;\uceec\ub809\uc158&#8217;\uacfc \uac19\uc740 \uc720\ud2f8\ub9ac\ud2f0 \ud074\ub798\uc2a4\ub3c4 \uc81c\uacf5\ud569\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4 sort, reverse, shuffle \ub4f1\uacfc \uac19\uc740 \ubc29\ubc95\uc744 \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\r\n\r\n\r\n\r\n<p>\ub2e4\uc74c\uc740 Java\uc5d0\uc11c \uceec\ub809\uc158\uc744 \uc0ac\uc6a9\ud558\ub294 \ubc29\ubc95\uc5d0 \ub300\ud55c \uae30\ubcf8 \uc608\uc785\ub2c8\ub2e4.<\/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: #81a1c1;\">import<\/span> <span style=\"color: #8fbcbb;\">java<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #8fbcbb;\">util<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #81a1c1;\">*;<\/span><\/span>\r\n\r\n<span class=\"line\"><span style=\"color: #81a1c1;\">public<\/span> <span style=\"color: #81a1c1;\">class<\/span> <span style=\"color: #8fbcbb;\">CollectionsExample<\/span> <span style=\"color: #eceff4;\">{<\/span><\/span>\r\n<span class=\"line\">    <span style=\"color: #81a1c1;\">public<\/span> <span style=\"color: #81a1c1;\">static<\/span> <span style=\"color: #81a1c1;\">void<\/span> <span style=\"color: #88c0d0;\">main<\/span><span style=\"color: #eceff4;\">(<\/span><span style=\"color: #8fbcbb;\">String<\/span><span style=\"color: #eceff4;\">[]<\/span> <span style=\"color: #d8dee9;\">args<\/span><span style=\"color: #eceff4;\">)<\/span> <span style=\"color: #eceff4;\">{<\/span><\/span>\r\n<span class=\"line\">        <span style=\"color: #616e88;\">\/\/ Create an ArrayList to store strings<\/span><\/span>\r\n<span class=\"line\">        <span style=\"color: #8fbcbb;\">List<\/span><span style=\"color: #eceff4;\">&lt;<\/span><span style=\"color: #8fbcbb;\">String<\/span><span style=\"color: #eceff4;\">&gt;<\/span> <span style=\"color: #d8dee9;\">myList<\/span> <span style=\"color: #81a1c1;\">=<\/span> <span style=\"color: #81a1c1;\">new<\/span> <span style=\"color: #8fbcbb;\">ArrayList<\/span><span style=\"color: #eceff4;\">&lt;&gt;()<\/span><span style=\"color: #81a1c1;\">;<\/span><\/span>\r\n\r\n<span class=\"line\">        <span style=\"color: #616e88;\">\/\/ Add elements to the list<\/span><\/span>\r\n<span class=\"line\">        <span style=\"color: #d8dee9;\">myList<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #88c0d0;\">add<\/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: #81a1c1;\">;<\/span><\/span>\r\n<span class=\"line\">        <span style=\"color: #d8dee9;\">myList<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #88c0d0;\">add<\/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>\r\n<span class=\"line\">        <span style=\"color: #d8dee9;\">myList<\/span><span style=\"color: #eceff4;\">.<\/span><span style=\"color: #88c0d0;\">add<\/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>\r\n\r\n<span class=\"line\">        <span style=\"color: #616e88;\">\/\/ Iterate through the list and print elements<\/span><\/span>\r\n<span class=\"line\">        <span style=\"color: #81a1c1;\">for<\/span> <span style=\"color: #eceff4;\">(<\/span><span style=\"color: #8fbcbb;\">String<\/span> <span style=\"color: #d8dee9;\">fruit<\/span> <span style=\"color: #81a1c1;\">:<\/span><span style=\"color: #d8dee9ff;\"> myList<\/span><span style=\"color: #eceff4;\">)<\/span> <span style=\"color: #eceff4;\">{<\/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: #d8dee9ff;\">fruit<\/span><span style=\"color: #eceff4;\">)<\/span><span style=\"color: #81a1c1;\">;<\/span><\/span>\r\n<span class=\"line\">        <span style=\"color: #eceff4;\">}<\/span><\/span>\r\n<span class=\"line\">    <span style=\"color: #eceff4;\">}<\/span><\/span>\r\n<span class=\"line\"><span style=\"color: #eceff4;\">}<\/span><\/span><\/code><\/pre>\r\n<\/div>\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>Java \uceec\ub809\uc158 \ud504\ub808\uc784\uc6cc\ud06c\ub294 Java 1.2\uc5d0 \ub3c4\uc785\ub418\uc5c8\uc73c\uba70 \uc2dc\uac04\uc774 \uc9c0\ub0a8\uc5d0 \ub530\ub77c \ubc1c\uc804\ud574 \uc654\uc2b5\ub2c8\ub2e4. \ucd5c\uc2e0 \ubc84\uc804\uc758 Java\uc5d0\uc11c\ub294 \uceec\ub809\uc158 \ud504\ub808\uc784\uc6cc\ud06c\uc5d0 \ucd94\uac00\uc801\uc778 \uac1c\uc120 \uc0ac\ud56d\uacfc \uae30\ub2a5\uc774 \ub3c4\uc785\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\r\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; &nbsp; \uceec\ub809\uc158(Collection) Java\uc5d0\uc11c \uceec\ub809\uc158\uc740 \uac1d\uccb4 \uadf8\ub8f9\uc744 \uc800\uc7a5, \uc870\uc791 \ubc0f &#8230;<\/p>\n","protected":false},"author":1,"featured_media":133,"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-132","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-programming"],"_links":{"self":[{"href":"https:\/\/mumooinfo.com\/wp-json\/wp\/v2\/posts\/132"}],"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=132"}],"version-history":[{"count":3,"href":"https:\/\/mumooinfo.com\/wp-json\/wp\/v2\/posts\/132\/revisions"}],"predecessor-version":[{"id":511,"href":"https:\/\/mumooinfo.com\/wp-json\/wp\/v2\/posts\/132\/revisions\/511"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mumooinfo.com\/wp-json\/wp\/v2\/media\/133"}],"wp:attachment":[{"href":"https:\/\/mumooinfo.com\/wp-json\/wp\/v2\/media?parent=132"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mumooinfo.com\/wp-json\/wp\/v2\/categories?post=132"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mumooinfo.com\/wp-json\/wp\/v2\/tags?post=132"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}