{"id":1300,"date":"2026-04-24T17:19:10","date_gmt":"2026-04-24T09:19:10","guid":{"rendered":"https:\/\/yunyanglib.cn\/?p=1300"},"modified":"2026-04-24T17:19:12","modified_gmt":"2026-04-24T09:19:12","slug":"%e3%80%90java%e3%80%91%e5%90%83%e9%80%8f%e9%9b%86%e5%90%88%e6%a1%86%e6%9e%b6%ef%bc%9alist%e3%80%81set%e3%80%81queue-%e5%92%8c-map-%e7%9a%84%e6%a0%b8%e5%bf%83%e7%94%a8%e6%b3%95%e4%b8%8e%e4%bb%a3","status":"publish","type":"post","link":"https:\/\/yunyanglib.cn\/?p=1300","title":{"rendered":"\u3010Java\u3011\u5403\u900f\u96c6\u5408\u6846\u67b6\uff1aList\u3001Set\u3001Queue \u548c Map \u7684\u6838\u5fc3\u7528\u6cd5\u4e0e\u4ee3\u7801\u5b9e\u6218"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u5927\u5bb6\u597d\uff0c\u6211\u662f\u4e91\u626c\uff5e \u4eca\u5929\u6765\u548c\u5927\u5bb6\u6df1\u5165\u804a\u804a Java \u96c6\u5408\u6846\u67b6\u4e2d\u6700\u6838\u5fc3\u7684\u56db\u5927\u7ec4\u4ef6\uff1aList\u3001Set\u3001Queue \u548c Map\u3002\u4f5c\u4e3a\u540e\u7aef\u5f00\u53d1\u4e2d\u9ad8\u9891\u4f7f\u7528\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5b83\u4eec\u5404\u81ea\u6709\u7740\u72ec\u7279\u7684\u7279\u6027\u548c\u9002\u7528\u573a\u666f\uff0c\u638c\u63e1\u597d\u5b83\u4eec\u7684\u7528\u6cd5\u80fd\u8ba9\u6211\u4eec\u7684\u4ee3\u7801\u66f4\u9ad8\u6548\u3001\u66f4\u4f18\u96c5\u3002\u4e0b\u9762\u7ed3\u5408\u5177\u4f53\u7279\u5f81\u548c\u4ee3\u7801\u793a\u4f8b\uff0c\u5e26\u5927\u5bb6\u5168\u9762\u5403\u900f\u8fd9\u4e9b\u96c6\u5408\u7c7b\uff5e<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e00\u3001\u96c6\u5408\u6846\u67b6\u603b\u89c8<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Java \u96c6\u5408\u6846\u67b6\u7684\u6838\u5fc3\u662f<code>Collection<\/code>\u63a5\u53e3\u548c<code>Map<\/code>\u63a5\u53e3\uff0c\u5176\u4e2d<code>Collection<\/code>\u4e3b\u8981\u5305\u542b\u4e09\u5927\u5206\u652f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>List<\/strong>\uff1a\u6709\u5e8f\u3001\u53ef\u91cd\u590d\uff0c\u652f\u6301\u4e0b\u6807\u64cd\u4f5c<\/li>\n\n\n\n<li><strong>Set<\/strong>\uff1a\u65e0\u5e8f\u3001\u4e0d\u53ef\u91cd\u590d\uff0c\u65e0\u4e0b\u6807\u652f\u6301<\/li>\n\n\n\n<li><strong>Queue<\/strong>\uff1a\u9075\u5faa\u7279\u5b9a\u987a\u5e8f\uff08\u5982 FIFO\uff09\u7684\u961f\u5217\u7ed3\u6784<\/li>\n\n\n\n<li><strong>Map<\/strong>\uff1a\u72ec\u7acb\u4e8e Collection\uff0c\u5b58\u50a8\u952e\u503c\u5bf9\uff08key \u552f\u4e00\uff0cvalue \u53ef\u91cd\u590d\uff09<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5148\u4e0a\u4e00\u5f20\u6838\u5fc3\u63a5\u53e3\u5173\u7cfb\u56fe\uff0c\u5e2e\u5927\u5bb6\u5efa\u7acb\u6574\u4f53\u8ba4\u77e5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Collection\n\u251c\u2500\u2500 List\uff08\u6709\u5e8f\u53ef\u91cd\u590d\uff09\n\u2502   \u251c\u2500\u2500 ArrayList\uff08\u6570\u7ec4\u5b9e\u73b0\uff09\n\u2502   \u251c\u2500\u2500 LinkedList\uff08\u94fe\u8868\u5b9e\u73b0\uff09\n\u2502   \u2514\u2500\u2500 Vector\uff08\u7ebf\u7a0b\u5b89\u5168\uff0c\u4f4e\u6548\uff09\n\u251c\u2500\u2500 Set\uff08\u65e0\u5e8f\u4e0d\u53ef\u91cd\u590d\uff09\n\u2502   \u251c\u2500\u2500 HashSet\uff08\u54c8\u5e0c\u5b9e\u73b0\uff0c\u53bb\u91cd\uff09\n\u2502   \u251c\u2500\u2500 LinkedHashSet\uff08\u6709\u5e8f\u53bb\u91cd\uff09\n\u2502   \u2514\u2500\u2500 TreeSet\uff08\u6392\u5e8f\u53bb\u91cd\uff09\n\u2514\u2500\u2500 Queue\uff08\u961f\u5217\uff09\n    \u251c\u2500\u2500 ArrayDeque\uff08\u53cc\u7aef\u961f\u5217\uff09\n    \u251c\u2500\u2500 LinkedList\uff08\u961f\u5217\u5b9e\u73b0\uff09\n    \u2514\u2500\u2500 PriorityQueue\uff08\u4f18\u5148\u7ea7\u961f\u5217\uff09\nMap\n\u251c\u2500\u2500 HashMap\uff08\u54c8\u5e0c\u5b9e\u73b0\uff0c\u65e0\u5e8f\uff09\n\u251c\u2500\u2500 LinkedHashMap\uff08\u6709\u5e8f\u952e\u503c\u5bf9\uff09\n\u2514\u2500\u2500 TreeMap\uff08\u6392\u5e8f\u952e\u503c\u5bf9\uff09\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e8c\u3001List\uff1a\u6709\u5e8f\u53ef\u91cd\u590d\u7684\u52a8\u6001\u6570\u7ec4<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">List \u7684\u6838\u5fc3\u4f18\u52bf\u662f<strong>\u5b58\u53d6\u6709\u5e8f\u3001\u652f\u6301\u4e0b\u6807\u64cd\u4f5c<\/strong>\uff0c\u9002\u5408\u9700\u8981\u6309\u987a\u5e8f\u5b58\u50a8\u4e14\u53ef\u80fd\u91cd\u590d\u7684\u6570\u636e\u573a\u666f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. ArrayList\uff08\u6570\u7ec4\u5b9e\u73b0\uff0c\u968f\u673a\u5b58\u53d6\u9ad8\u6548\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6838\u5fc3\u7279\u5f81<\/strong>\uff1a\u57fa\u4e8e\u52a8\u6001\u6570\u7ec4\uff0c\u968f\u673a\u8bbf\u95ee\u5feb\uff08O (1)\uff09\uff0c\u4e2d\u95f4\u589e\u5220\u6162\uff08\u9700\u590d\u5236\u79fb\u52a8\u5143\u7d20\uff09\uff0c\u975e\u7ebf\u7a0b\u5b89\u5168\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4ee3\u7801\u793a\u4f8b\uff1aArrayList \u7684\u589e\u5220\u6539\u67e5<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.util.ArrayList;\nimport java.util.List;\n\npublic class ArrayListDemo {\n    public static void main(String&#91;] args) {\n        \/\/ \u521d\u59cb\u5316ArrayList\uff08\u521d\u59cb\u5bb9\u91cf16\uff0c\u8d1f\u8f7d\u56e0\u5b500.75\uff09\n        List&lt;String&gt; list = new ArrayList();\n        \n        \/\/ \u589e\uff1a\u5c3e\u90e8\u6dfb\u52a0\uff08\u9ad8\u6548\uff09\n        list.add(\"Java\");\n        list.add(\"MySQL\");\n        list.add(\"Java\"); \/\/ \u5141\u8bb8\u91cd\u590d\u5143\u7d20\n        System.out.println(\"\u6dfb\u52a0\u540e\uff1a\" + list); \/\/ \u8f93\u51fa\uff1a&#91;Java, MySQL, Java]\n        \n        \/\/ \u6539\uff1a\u901a\u8fc7\u4e0b\u6807\u4fee\u6539\n        list.set(1, \"Redis\");\n        System.out.println(\"\u4fee\u6539\u540e\uff1a\" + list); \/\/ \u8f93\u51fa\uff1a&#91;Java, Redis, Java]\n        \n        \/\/ \u67e5\uff1a\u968f\u673a\u8bbf\u95ee\uff08\u9ad8\u6548\uff09\n        String element = list.get(0);\n        System.out.println(\"\u4e0b\u68070\u7684\u5143\u7d20\uff1a\" + element); \/\/ \u8f93\u51fa\uff1aJava\n        \n        \/\/ \u5220\uff1a\u4e2d\u95f4\u5220\u9664\uff08\u4f4e\u6548\uff0c\u9700\u79fb\u52a8\u5143\u7d20\uff09\n        list.remove(2);\n        System.out.println(\"\u5220\u9664\u540e\uff1a\" + list); \/\/ \u8f93\u51fa\uff1a&#91;Java, Redis]\n        \n        \/\/ \u904d\u5386\uff08\u4e0b\u6807\u904d\u5386\u6700\u9ad8\u6548\uff09\n        for (int i = 0; i &lt; list.size(); i++) {\n            System.out.println(\"\u904d\u5386\u5143\u7d20\uff1a\" + list.get(i));\n        }\n    }\n}\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">2. LinkedList\uff08\u53cc\u5411\u94fe\u8868\uff0c\u589e\u5220\u9ad8\u6548\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6838\u5fc3\u7279\u5f81<\/strong>\uff1a\u57fa\u4e8e\u53cc\u5411\u94fe\u8868\uff0c\u4e2d\u95f4\u589e\u5220\u5feb\uff08O (1)\uff09\uff0c\u968f\u673a\u8bbf\u95ee\u6162\uff08O (n)\uff09\uff0c\u652f\u6301\u961f\u5217 \/ \u6808\u64cd\u4f5c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4ee3\u7801\u793a\u4f8b\uff1aLinkedList \u7684\u961f\u5217\u7528\u6cd5<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.util.LinkedList;\nimport java.util.Queue;\n\npublic class LinkedListDemo {\n    public static void main(String&#91;] args) {\n        \/\/ \u4f5c\u4e3a\u961f\u5217\u4f7f\u7528\uff08FIFO\uff09\n        Queue&lt;String&gt; queue = new LinkedList&lt;&gt;();\n\n        \/\/ \u5165\u961f\uff1aoffer()\uff08\u63a8\u8350\uff0c\u5931\u8d25\u8fd4\u56defalse\uff09\n        queue.offer(\"\u4efb\u52a11\");\n        queue.offer(\"\u4efb\u52a12\");\n        queue.offer(\"\u4efb\u52a13\");\n        System.out.println(\"\u961f\u5217\u5185\u5bb9\uff1a\" + queue); \/\/ \u8f93\u51fa\uff1a&#91;\u4efb\u52a11, \u4efb\u52a12, \u4efb\u52a13]\n\n        \/\/ \u51fa\u961f\uff1apoll()\uff08\u79fb\u9664\u5e76\u8fd4\u56de\u5934\u90e8\uff0c\u7a7a\u961f\u5217\u8fd4\u56denull\uff09\n        String task = queue.poll();\n        System.out.println(\"\u6267\u884c\u4efb\u52a1\uff1a\" + task); \/\/ \u8f93\u51fa\uff1a\u4efb\u52a11\n        System.out.println(\"\u51fa\u961f\u540e\uff1a\" + queue); \/\/ \u8f93\u51fa\uff1a&#91;\u4efb\u52a12, \u4efb\u52a13]\n\n        \/\/ \u67e5\u770b\u5934\u90e8\uff1apeek()\uff08\u4e0d\u5220\u9664\uff09\n        String head = queue.peek();\n        System.out.println(\"\u5f53\u524d\u5934\u90e8\u4efb\u52a1\uff1a\" + head); \/\/ \u8f93\u51fa\uff1a\u4efb\u52a12\n\n        \/\/ \u4f5c\u4e3a\u94fe\u8868\uff0c\u4e2d\u95f4\u63d2\u5165\uff08\u9ad8\u6548\uff09\n        List&lt;String&gt; linkedList = new LinkedList&lt;&gt;(queue);\n        linkedList.add(1, \"\u7d27\u6025\u4efb\u52a1\");\n        System.out.println(\"\u63d2\u5165\u540e\uff1a\" + linkedList); \/\/ \u8f93\u51fa\uff1a&#91;\u4efb\u52a12, \u7d27\u6025\u4efb\u52a1, \u4efb\u52a13]\n    }\n}\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">3. \u907f\u5751\u63d0\u9192<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u907f\u514d\u7528<code>Vector<\/code>\u548c<code>Stack<\/code>\uff1aVector \u662f\u7ebf\u7a0b\u5b89\u5168\u7684 ArrayList\uff0c\u4f46\u6548\u7387\u6781\u4f4e\uff1bStack \u5df2\u88ab ArrayDeque \u53d6\u4ee3\u3002<\/li>\n\n\n\n<li>\u5927\u6570\u636e\u91cf\u573a\u666f\uff1a\u5982\u679c\u9700\u8981\u9891\u7e41\u589e\u5220\uff0c\u4f18\u5148\u7528 LinkedList\uff1b\u9700\u8981\u9891\u7e41\u67e5\u8be2\uff0c\u4f18\u5148\u7528 ArrayList\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e09\u3001Set\uff1a\u65e0\u5e8f\u4e0d\u53ef\u91cd\u590d\u7684\u53bb\u91cd\u795e\u5668<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Set \u7684\u6838\u5fc3\u4ef7\u503c\u662f<strong>\u81ea\u52a8\u53bb\u91cd<\/strong>\uff0c\u9002\u5408\u5b58\u50a8\u4e0d\u9700\u8981\u91cd\u590d\u7684\u6570\u636e\uff08\u5982\u7528\u6237 ID\u3001\u5173\u952e\u8bcd\u7b49\uff09\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. HashSet\uff08\u57fa\u4e8e HashMap\uff0c\u53bb\u91cd\u9996\u9009\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6838\u5fc3\u7279\u5f81<\/strong>\uff1a\u5e95\u5c42\u662f HashMap\uff08\u503c\u4e3a\u56fa\u5b9a Object\uff09\uff0c\u65e0\u5e8f\uff0c\u53bb\u91cd\u6548\u7387\u9ad8\uff0c\u5141\u8bb8 null \u5143\u7d20\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4ee3\u7801\u793a\u4f8b\uff1aHashSet \u53bb\u91cd\u5b9e\u6218<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.util.HashSet;\nimport java.util.Set;\n\npublic class HashSetDemo {\n    public static void main(String&#91;] args) {\n        \/\/ \u7edf\u8ba1\u6587\u7ae0\u4e2d\u4e0d\u91cd\u590d\u7684\u5355\u8bcd\n        String article = \"Java \u662f\u6700\u597d\u7684\u8bed\u8a00 Java \u8bed\u8a00 \u540e\u7aef\u5f00\u53d1 \u6700\u597d\u7684\";\n        String&#91;] words = article.split(\" \");\n\n        Set&lt;String&gt; uniqueWords = new HashSet&lt;&gt;();\n        for (String word : words) {\n            uniqueWords.add(word); \/\/ \u81ea\u52a8\u53bb\u91cd\n        }\n\n        System.out.println(\"\u4e0d\u91cd\u590d\u5355\u8bcd\u6570\uff1a\" + uniqueWords.size()); \/\/ \u8f93\u51fa\uff1a5\n        System.out.println(\"\u4e0d\u91cd\u590d\u5355\u8bcd\uff1a\" + uniqueWords); \/\/ \u8f93\u51fa\uff1a&#91;Java, \u8bed\u8a00, \u6700\u597d\u7684, \u540e\u7aef\u5f00\u53d1, \u662f]\uff08\u65e0\u5e8f\uff09\n    }\n}\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">2. LinkedHashSet\uff08\u6709\u5e8f\u53bb\u91cd\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6838\u5fc3\u7279\u5f81<\/strong>\uff1a\u7ee7\u627f HashSet\uff0c\u5e95\u5c42\u662f LinkedHashMap\uff0c\u65e2\u4fdd\u7559\u53bb\u91cd\u7279\u6027\uff0c\u53c8\u80fd\u7ef4\u62a4\u63d2\u5165\u987a\u5e8f\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.util.LinkedHashSet;\nimport java.util.Set;\n\npublic class LinkedHashSetDemo {\n    public static void main(String&#91;] args) {\n        Set&lt;String&gt; set = new LinkedHashSet&lt;&gt;();\n        set.add(\"\u5f20\u4e09\");\n        set.add(\"\u674e\u56db\");\n        set.add(\"\u5f20\u4e09\"); \/\/ \u53bb\u91cd\n        set.add(\"\u738b\u4e94\");\n\n        \/\/ \u8f93\u51fa\u987a\u5e8f\u4e0e\u63d2\u5165\u987a\u5e8f\u4e00\u81f4\n        System.out.println(set); \/\/ \u8f93\u51fa\uff1a&#91;\u5f20\u4e09, \u674e\u56db, \u738b\u4e94]\n    }\n}\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">3. TreeSet\uff08\u6392\u5e8f\u53bb\u91cd\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6838\u5fc3\u7279\u5f81<\/strong>\uff1a\u5e95\u5c42\u662f TreeMap\uff0c\u6309\u81ea\u7136\u987a\u5e8f\u6216\u81ea\u5b9a\u4e49\u6bd4\u8f83\u5668\u6392\u5e8f\uff0c\u4e0d\u5141\u8bb8 null \u5143\u7d20\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.util.TreeSet;\nimport java.util.Set;\n\npublic class TreeSetDemo {\n    public static void main(String&#91;] args) {\n        \/\/ \u81ea\u7136\u6392\u5e8f\uff08\u6574\u6570\u5347\u5e8f\uff09\n        Set&lt;Integer&gt; numSet = new TreeSet numSet.add(3);\n        numSet.add(1);\n        numSet.add(2);\n        numSet.add(3); \/\/ \u53bb\u91cd\n        System.out.println(\"\u81ea\u7136\u6392\u5e8f\uff1a\" + numSet); \/\/ \u8f93\u51fa\uff1a&#91;1, 2, 3]\n        \n        \/\/ \u81ea\u5b9a\u4e49\u6bd4\u8f83\u5668\uff08\u5b57\u7b26\u4e32\u957f\u5ea6\u964d\u5e8f\uff09\n        Set&gt; strSet = new TreeSet s2) -&gt; s2.length() - s1.length());\n        strSet.add(\"apple\");\n        strSet.add(\"banana\");\n        strSet.add(\"cherry\");\n        System.out.println(\"\u81ea\u5b9a\u4e49\u6392\u5e8f\uff1a\" + strSet); \/\/ \u8f93\u51fa\uff1a&#91;banana, cherry, apple]\n    }\n}\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u56db\u3001Queue\uff1a\u9075\u5faa\u89c4\u5219\u7684\u961f\u5217\u7ed3\u6784<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Queue \u7684\u6838\u5fc3\u662f<strong>\u9075\u5faa\u7279\u5b9a\u8bbf\u95ee\u987a\u5e8f<\/strong>\uff0c\u5e38\u89c1\u573a\u666f\uff1a\u4efb\u52a1\u961f\u5217\u3001\u6d88\u606f\u961f\u5217\u7b49\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. ArrayDeque\uff08\u53cc\u7aef\u961f\u5217\uff0c\u9ad8\u6548\u66ff\u4ee3 Stack\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6838\u5fc3\u7279\u5f81<\/strong>\uff1a\u57fa\u4e8e\u5faa\u73af\u6570\u7ec4\uff0c\u652f\u6301\u4e24\u7aef\u589e\u5220\uff08O (1)\uff09\uff0c\u968f\u673a\u8bbf\u95ee\u5feb\uff0c\u6548\u7387\u9ad8\u4e8e LinkedList\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.util.ArrayDeque;\nimport java.util.Deque;\n\npublic class ArrayDequeDemo {\n    public static void main(String&#91;] args) {\n        \/\/ \u4f5c\u4e3a\u6808\u4f7f\u7528\uff08LIFO\uff09\n        Deque&lt;String&gt; stack = new ArrayDeque&lt;&gt;();\n        stack.push(\"\u9875\u9762A\");\n        stack.push(\"\u9875\u9762B\");\n        stack.push(\"\u9875\u9762C\");\n\n        System.out.println(\"\u6808\u9876\u5143\u7d20\uff1a\" + stack.peek()); \/\/ \u8f93\u51fa\uff1a\u9875\u9762C\n        String popPage = stack.pop();\n        System.out.println(\"\u51fa\u6808\u5143\u7d20\uff1a\" + popPage); \/\/ \u8f93\u51fa\uff1a\u9875\u9762C\n        System.out.println(\"\u6808\u5269\u4f59\uff1a\" + stack); \/\/ \u8f93\u51fa\uff1a&#91;\u9875\u9762B, \u9875\u9762A]\n\n        \/\/ \u4f5c\u4e3a\u53cc\u7aef\u961f\u5217\uff0c\u4e24\u7aef\u64cd\u4f5c\n        Deque&lt;String&gt; deque = new ArrayDeque&lt;&gt;();\n        deque.addFirst(\"\u5934\u90e8\u5143\u7d20\");\n        deque.addLast(\"\u5c3e\u90e8\u5143\u7d20\");\n        System.out.println(\"\u53cc\u7aef\u961f\u5217\uff1a\" + deque); \/\/ \u8f93\u51fa\uff1a&#91;\u5934\u90e8\u5143\u7d20, \u5c3e\u90e8\u5143\u7d20]\n        deque.removeFirst();\n        deque.removeLast();\n        System.out.println(\"\u6e05\u7a7a\u540e\uff1a\" + deque); \/\/ \u8f93\u51fa\uff1a&#91;]\n    }\n}\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">2. PriorityQueue\uff08\u4f18\u5148\u7ea7\u961f\u5217\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6838\u5fc3\u7279\u5f81<\/strong>\uff1a\u57fa\u4e8e\u5806\u7ed3\u6784\uff0c\u51fa\u961f\u987a\u5e8f\u6309\u4f18\u5148\u7ea7\uff08\u9ed8\u8ba4\u5347\u5e8f\uff09\uff0c\u5143\u7d20\u9700\u5b9e\u73b0 Comparable \u63a5\u53e3\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.util.PriorityQueue;\nimport java.util.Queue;\n\n\/\/ \u81ea\u5b9a\u4e49\u4efb\u52a1\u7c7b\uff0c\u5b9e\u73b0Comparable\u63a5\u53e3\nclass Task implements Comparable&lt;Task&gt; {\n    private String name;\n    private int priority; \/\/ \u4f18\u5148\u7ea7\uff1a\u6570\u5b57\u8d8a\u5927\u8d8a\u4f18\u5148\n\n    public Task(String name, int priority) {\n        this.name = name;\n        this.priority = priority;\n    }\n\n    @Override\n    public int compareTo(Task o) {\n        \/\/ \u964d\u5e8f\u6392\u5e8f\uff08\u4f18\u5148\u7ea7\u9ad8\u7684\u5148\u51fa\u961f\uff09\n        return o.priority - this.priority;\n    }\n\n    @Override\n    public String toString() {\n        return name + \"(\u4f18\u5148\u7ea7\uff1a\" + priority + \")\";\n    }\n}\n\npublic class PriorityQueueDemo {\n    public static void main(String&#91;] args) {\n        Queue queue = new PriorityQueue();\n        queue.offer(new Task(\"\u666e\u901a\u4efb\u52a1\", 1));\n        queue.offer(new Task(\"\u7d27\u6025\u4efb\u52a1\", 3));\n        queue.offer(new Task(\"\u91cd\u8981\u4efb\u52a1\", 2));\n        \n        \/\/ \u6309\u4f18\u5148\u7ea7\u51fa\u961f\n        while (!queue.isEmpty()) {\n            System.out.println(\"\u6267\u884c\u4efb\u52a1\uff1a\" + queue.poll());\n        }\n        \/\/ \u8f93\u51fa\u987a\u5e8f\uff1a\u7d27\u6025\u4efb\u52a1(\u4f18\u5148\u7ea7\uff1a3) \u2192 \u91cd\u8981\u4efb\u52a1(\u4f18\u5148\u7ea7\uff1a2) \u2192 \u666e\u901a\u4efb\u52a1(\u4f18\u5148\u7ea7\uff1a1)\n    }\n}\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e94\u3001Map\uff1a\u952e\u503c\u5bf9\u7684\u9ad8\u6548\u5b58\u50a8<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Map \u662f<strong>\u952e\u503c\u5bf9\u96c6\u5408<\/strong>\uff0c\u6838\u5fc3\u662f\u901a\u8fc7 key \u5feb\u901f\u67e5\u627e value\uff0ckey \u552f\u4e00\u4e14\u4e0d\u53ef\u91cd\u590d\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. HashMap\uff08\u54c8\u5e0c\u5b9e\u73b0\uff0c\u65e5\u5e38\u9996\u9009\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6838\u5fc3\u7279\u5f81<\/strong>\uff1a\u5e95\u5c42\u662f\u54c8\u5e0c\u8868\uff08\u6570\u7ec4 + \u94fe\u8868 \/ \u7ea2\u9ed1\u6811\uff09\uff0c\u67e5\u8be2\u6548\u7387\u9ad8\uff08O (1)\uff09\uff0c\u65e0\u5e8f\uff0ckey \u548c value \u5747\u53ef\u4e3a null\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4ee3\u7801\u793a\u4f8b\uff1aHashMap \u7684\u5e38\u7528\u64cd\u4f5c<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.util.HashMap;\nimport java.util.Map;\n\npublic class HashMapDemo {\n    public static void main(String&#91;] args) {\n        Map&lt;String, Integer&gt; userAge = new HashMap&lt;&gt;();\n        userAge.put(\"\u5f20\u4e09\", 25);\n        userAge.put(\"\u674e\u56db\", 30);\n        userAge.put(\"\u738b\u4e94\", 28);\n        userAge.put(\"\u5f20\u4e09\", 26); \/\/ key\u91cd\u590d\uff0c\u8986\u76d6value\n        System.out.println(\"HashMap\u5185\u5bb9\uff1a\" + userAge); \/\/ \u8f93\u51fa\uff1a{\u674e\u56db=30, \u5f20\u4e09=26, \u738b\u4e94=28}\uff08\u65e0\u5e8f\uff09\n\n        \/\/ \u67e5\uff1aget()\n        int age = userAge.get(\"\u674e\u56db\");\n        System.out.println(\"\u674e\u56db\u7684\u5e74\u9f84\uff1a\" + age); \/\/ \u8f93\u51fa\uff1a30\n\n        \/\/ \u5224\u5b58\uff1acontainsKey()\/containsValue()\n        boolean hasZhang = userAge.containsKey(\"\u5f20\u4e09\");\n        boolean hasAge30 = userAge.containsValue(30);\n        System.out.println(\"\u662f\u5426\u5305\u542b\u5f20\u4e09\uff1a\" + hasZhang); \/\/ \u8f93\u51fa\uff1atrue\n        System.out.println(\"\u662f\u5426\u670930\u5c81\u7528\u6237\uff1a\" + hasAge30); \/\/ \u8f93\u51fa\uff1atrue\n\n        \/\/ \u904d\u5386\uff1aforEach()\n        System.out.println(\"\u904d\u5386\u952e\u503c\u5bf9\uff1a\");\n        userAge.forEach((key, value) -&gt; System.out.println(key + \"\uff1a\" + value));\n\n        \/\/ \u5220\uff1aremove()\n        userAge.remove(\"\u738b\u4e94\");\n        System.out.println(\"\u5220\u9664\u540e\uff1a\" + userAge); \/\/ \u8f93\u51fa\uff1a{\u674e\u56db=30, \u5f20\u4e09=26}\n    }\n}\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">2. LinkedHashMap\uff08\u6709\u5e8f\u952e\u503c\u5bf9\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6838\u5fc3\u7279\u5f81<\/strong>\uff1a\u7ee7\u627f HashMap\uff0c\u901a\u8fc7\u53cc\u5411\u94fe\u8868\u7ef4\u62a4\u63d2\u5165 \/ \u8bbf\u95ee\u987a\u5e8f\uff0c\u9002\u5408\u9700\u8981\u4fdd\u7559\u987a\u5e8f\u7684\u573a\u666f\uff08\u5982\u7f13\u5b58 LRU\uff09\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.util.LinkedHashMap;\nimport java.util.Map;\n\npublic class LinkedHashMapDemo {\n    public static void main(String&#91;] args) {\n        \/\/ \u7ef4\u62a4\u63d2\u5165\u987a\u5e8f\n        Map&lt;String, String&gt; map = new LinkedHashMap&lt;&gt;();\n        map.put(\"a\", \"\u82f9\u679c\");\n        map.put(\"b\", \"\u9999\u8549\");\n        map.put(\"c\", \"\u6a31\u6843\");\n\n        \/\/ \u8f93\u51fa\u987a\u5e8f\u4e0e\u63d2\u5165\u987a\u5e8f\u4e00\u81f4\n        System.out.println(\"\u63d2\u5165\u987a\u5e8f\uff1a\" + map); \/\/ \u8f93\u51fa\uff1a{a=\u82f9\u679c, b=\u9999\u8549, c=\u6a31\u6843}\n\n        \/\/ \u8bbf\u95ee\u5143\u7d20\u540e\uff0c\u987a\u5e8f\u4e0d\u53d8\uff08\u9ed8\u8ba4\u63d2\u5165\u987a\u5e8f\uff09\n        map.get(\"b\");\n        System.out.println(\"\u8bbf\u95ee\u540e\u987a\u5e8f\uff1a\" + map); \/\/ \u8f93\u51fa\uff1a{a=\u82f9\u679c, b=\u9999\u8549, c=\u6a31\u6843}\n\n        \/\/ \u6784\u9020\u51fd\u6570\u8bbe\u7f6e\u4e3a\u8bbf\u95ee\u987a\u5e8f\uff08LRU\u7f13\u5b58\u6838\u5fc3\uff09\n        Map&lt;String,String&gt; lruMap = new LinkedHashMap&lt;&gt;( 10,0.75f, true);\n        lruMap.put(\"a\", \"\u82f9\u679c\");\n        lruMap.put(\"b\", \"\u9999\u8549\");\n        lruMap.put(\"c\", \"\u6a31\u6843\");\n        lruMap.get(\"b\"); \/\/ \u8bbf\u95eeb\n        System.out.println(\"LRU\u8bbf\u95ee\u987a\u5e8f\uff1a\" + lruMap); \/\/ \u8f93\u51fa\uff1a{a=\u82f9\u679c, c=\u6a31\u6843, b=\u9999\u8549}\uff08\u6700\u8fd1\u8bbf\u95ee\u7684\u653e\u6700\u540e\uff09\n    }\n}\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">3. TreeMap\uff08\u6392\u5e8f\u952e\u503c\u5bf9\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6838\u5fc3\u7279\u5f81<\/strong>\uff1a\u5e95\u5c42\u662f\u7ea2\u9ed1\u6811\uff0c\u6309 key \u81ea\u7136\u6392\u5e8f\u6216\u81ea\u5b9a\u4e49\u6392\u5e8f\uff0c\u9002\u5408\u9700\u8981\u6392\u5e8f\u7684\u952e\u503c\u5bf9\u573a\u666f\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.util.TreeMap;\nimport java.util.Map;\n\npublic class TreeMapDemo {\n    public static void main(String&#91;] args) {\n         \/\/ \u81ea\u7136\u6392\u5e8f\uff08\u5b57\u7b26\u4e32\u5b57\u5178\u5e8f\uff09\n        Map&lt;String, Integer&gt; treeMap = new TreeMap&lt;&gt;();\n        treeMap.put(\"banana\", 3);\n        treeMap.put(\"apple\", 1);\n        treeMap.put(\"cherry\", 2);\n\n        System.out.println(\"\u81ea\u7136\u6392\u5e8f\uff1a\" + treeMap); \/\/ \u8f93\u51fa\uff1a{apple=1, banana=3, cherry=2}\n\n        \/\/ \u81ea\u5b9a\u4e49\u6bd4\u8f83\u5668\uff08\u6309key\u957f\u5ea6\u6392\u5e8f\uff09\n        Map&lt;String, Integer&gt; customTreeMap = new TreeMap&lt;&gt;((k1, k2) -&gt; k1.length() - k2.length());\n        customTreeMap.put(\"banana\", 3);\n        customTreeMap.put(\"apple\", 1);\n        customTreeMap.put(\"pear\", 2);\n        System.out.println(\"\u81ea\u5b9a\u4e49\u6392\u5e8f\uff1a\" + customTreeMap); \/\/ \u8f93\u51fa\uff1a{pear=2, apple=1, banana=3}\n    }\n}\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u516d\u3001\u603b\u7ed3\uff1a\u96c6\u5408\u7c7b\u9009\u62e9\u6307\u5357<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">\u573a\u666f\u9700\u6c42<\/th><th class=\"has-text-align-left\" data-align=\"left\">\u63a8\u8350\u96c6\u5408<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">\u6709\u5e8f\u53ef\u91cd\u590d\u3001\u9891\u7e41\u67e5\u8be2<\/td><td class=\"has-text-align-left\" data-align=\"left\">ArrayList<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">\u6709\u5e8f\u53ef\u91cd\u590d\u3001\u9891\u7e41\u589e\u5220<\/td><td class=\"has-text-align-left\" data-align=\"left\">LinkedList<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">\u53bb\u91cd\u3001\u65e0\u5e8f<\/td><td class=\"has-text-align-left\" data-align=\"left\">HashSet<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">\u53bb\u91cd\u3001\u6709\u5e8f<\/td><td class=\"has-text-align-left\" data-align=\"left\">LinkedHashSet<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">\u53bb\u91cd\u3001\u6392\u5e8f<\/td><td class=\"has-text-align-left\" data-align=\"left\">TreeSet<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">\u961f\u5217\u3001\u6808\u64cd\u4f5c<\/td><td class=\"has-text-align-left\" data-align=\"left\">ArrayDeque<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">\u4f18\u5148\u7ea7\u4efb\u52a1\u961f\u5217<\/td><td class=\"has-text-align-left\" data-align=\"left\">PriorityQueue<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">\u952e\u503c\u5bf9\u3001\u65e0\u5e8f\u3001\u9ad8\u6548\u67e5\u8be2<\/td><td class=\"has-text-align-left\" data-align=\"left\">HashMap<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">\u952e\u503c\u5bf9\u3001\u6709\u5e8f<\/td><td class=\"has-text-align-left\" data-align=\"left\">LinkedHashMap<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">\u952e\u503c\u5bf9\u3001\u6392\u5e8f<\/td><td class=\"has-text-align-left\" data-align=\"left\">TreeMap<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5\u4e0a\u5c31\u662f Java \u96c6\u5408\u6846\u67b6\u6838\u5fc3\u7ec4\u4ef6\u7684\u5168\u90e8\u5185\u5bb9\u5566\uff5e \u6bcf\u4e2a\u96c6\u5408\u7c7b\u90fd\u6709\u5176\u8bbe\u8ba1\u521d\u8877\uff0c\u638c\u63e1\u5b83\u4eec\u7684\u5e95\u5c42\u5b9e\u73b0\u548c\u9002\u7528\u573a\u666f\uff0c\u624d\u80fd\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\u505a\u51fa\u6700\u4f18\u9009\u62e9\u3002\u5982\u679c\u5927\u5bb6\u6709\u7591\u95ee\u6216\u8865\u5145\uff0c\u6b22\u8fce\u5728\u8bc4\u8bba\u533a\u4ea4\u6d41\uff5e \u4e0b\u671f\u518d\u89c1\uff01<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5927\u5bb6\u597d\uff0c\u6211\u662f\u4e91\u626c\uff5e \u4eca\u5929\u6765\u548c\u5927\u5bb6\u6df1\u5165\u804a\u804a Java \u96c6\u5408\u6846\u67b6\u4e2d\u6700\u6838\u5fc3\u7684\u56db\u5927\u7ec4\u4ef6\uff1aList\u3001Set\u3001Queue <\/p>\n<div class=\"more-link\">\n\t\t\t\t <a href=\"https:\/\/yunyanglib.cn\/?p=1300\" class=\"link-btn theme-btn\"><span>Read More <\/span> <i class=\"fa fa-caret-right\"><\/i><\/a>\n\t\t\t<\/div>\n","protected":false},"author":1,"featured_media":1303,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[15],"class_list":["post-1300","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-java","tag-java"],"_links":{"self":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts\/1300","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1300"}],"version-history":[{"count":3,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts\/1300\/revisions"}],"predecessor-version":[{"id":1403,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts\/1300\/revisions\/1403"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/media\/1303"}],"wp:attachment":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1300"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1300"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1300"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}