{"id":67,"date":"2024-08-23T21:52:57","date_gmt":"2024-08-23T13:52:57","guid":{"rendered":"https:\/\/blog.easitch.com\/?p=67"},"modified":"2026-03-18T14:25:00","modified_gmt":"2026-03-18T06:25:00","slug":"%e8%ae%b0%e4%b8%80%e6%ac%a1%e6%9d%ad%e5%b7%9e%e4%b9%90%e5%85%b6%e9%9b%86%e5%9b%a2%e9%9d%a2%e8%af%95%e9%a2%98","status":"publish","type":"post","link":"https:\/\/blog.eastfond.com\/?p=67","title":{"rendered":"\u8bb0\u4e00\u6b21\u676d\u5dde\u4e50\u5176\u96c6\u56e2\u9762\u8bd5\u9898"},"content":{"rendered":"<h1>ArrayList\u3001LinkedList\u7684\u533a\u522b\u662f\u4ec0\u4e48<\/h1>\n<ol>\n<li>ArrayList\u662f\u57fa\u4e8e\u6570\u7ec4\u5b9e\u73b0\u7684\uff0c\u800cLinkedList\u662f\u57fa\u4e8e\u94fe\u8868\u5b9e\u73b0\u7684\u3002<\/li>\n<li>ArrayList\u652f\u6301\u5728\u4efb\u610f\u4f4d\u7f6e\u8bbf\u95ee\uff0c\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO\uff081\uff09\uff0c\u4f46\u662f\u5728\u968f\u673a\u63d2\u5165\u7684\u65f6\u5019\u9700\u8981\u79fb\u52a8\u5143\u7d20\uff0c\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO\uff08n\uff09\u53ea\u6709\u5728\u6570\u7ec4\u672b\u5c3e\u63d2\u5165\u6216\u5220\u9664\u5143\u7d20\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(1)\uff0cLinkedList\u652f\u6301\u5728\u4efb\u610f\u4f4d\u7f6e\u63d2\u5165\u5220\u9664\u548c\u4fee\u6539\u3001\u5220\u9664\uff0c\u5b83\u53ea\u9700\u8981\u4fee\u6539\u524d\u540e\u8282\u70b9\u7684\u6307\u9488\u5373\u53ef\uff0c\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO\uff081\uff09\uff0c\u4f46\u662f\u65e0\u6cd5\u652f\u6301\u968f\u673a\u8bbf\u95ee\uff0c\u9700\u8981\u4ece\u5934\u7ed3\u70b9\u6307\u9488\u6765\u904d\u5386\u3002<\/li>\n<\/ol>\n<h1>ArrayList\u3001LinkedList\u662f\u7ebf\u7a0b\u5b89\u5168\u7684\u5417<\/h1>\n<p>\u4e24\u8005\u90fd\u4e0d\u662f\uff0c\u8fd9\u8fd8\u662f\u56de\u5230\u4e86\u4e0a\u4e00\u4e2a\u95ee\u9898\u7684\u7b54\u6848\uff0c\u56e0\u4e3aArrayList\u4e2d\u7ef4\u62a4\u4e86\u4e00\u4e2a\u6570\u7ec4\uff0c\u5728\u5e76\u53d1\u7684\u60c5\u51b5\u4e0b\u5c31\u662f\u591a\u7ebf\u7a0b\u540c\u65f6\u53bb\u64cd\u4f5c\u4e00\u4e2a\u6570\u7ec4\u90a3\u4e48\u5f88\u6709\u53ef\u80fd\u4f1a\u51fa\u73b0\u6570\u636e\u4e0d\u4e00\u81f4\u95ee\u9898\uff0cLinkedList\u5185\u90e8\u662f\u4e00\u4e2a\u53cc\u5411\u94fe\u8868\uff0c\u6bcf\u4e2a\u8282\u70b9\u90fd\u6709\u4e00\u4e2a\u5934\u5c3e\u6307\u9488\uff0c\u540c\u6837\u5728\u5e76\u53d1\u73af\u5883\u4e2d\u4f1a\u51fa\u73b0\u7ebf\u7a0b\u5b89\u5168\u95ee\u9898\u3002<\/p>\n<h1>\u5982\u4f55\u521b\u5efa\u4e00\u4e2a\u7ebf\u7a0b\u5b89\u5168\u7684\u96c6\u5408<\/h1>\n<p>\u5728Java\u4e2d\u521b\u5efa\u4e00\u4e2a\u7ebf\u7a0b\u5b89\u5168\u7684\u96c6\u5408\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u51e0\u79cd\u65b9\u6cd5\u5b9e\u73b0\uff1a<\/p>\n<ol>\n<li>\n<p><strong>\u4f7f\u7528<code>Collections.synchronizedList()<\/code>\u65b9\u6cd5<\/strong><\/p>\n<ul>\n<li>\n<p><code>Collections.synchronizedList()<\/code>\u65b9\u6cd5\u53ef\u4ee5\u5c06\u4e00\u4e2a\u666e\u901a\u7684<code>List<\/code>\uff08\u5982<code>ArrayList<\/code>\u6216<code>LinkedList<\/code>\uff09\u5305\u88c5\u6210\u7ebf\u7a0b\u5b89\u5168\u7684\u5217\u8868\u3002\u8fd9\u4e2a\u65b9\u6cd5\u4f1a\u5728\u5217\u8868\u7684\u6240\u6709\u64cd\u4f5c\u4e0a\u6dfb\u52a0\u540c\u6b65\u9501\uff0c\u786e\u4fdd\u7ebf\u7a0b\u5b89\u5168\u3002<\/p>\n<\/li>\n<li>\n<p>\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<pre><code class=\"language-java\">import java.util.ArrayList;\nimport java.util.Collections;\nimport java.util.List;\n\npublic class ThreadSafeListExample {\n public static void main(String[] args) {\n     List<String> synchronizedList = Collections.synchronizedList(new ArrayList<>());\n\n     \/\/ \u6dfb\u52a0\u5143\u7d20\n     synchronizedList.add(\"element1\");\n     synchronizedList.add(\"element2\");\n\n     \/\/ \u8bbf\u95ee\u5143\u7d20\n     String element = synchronizedList.get(0);\n     System.out.println(element);\n }\n}<\/code><\/pre>\n<\/li>\n<li>\n<p>\u8fd9\u79cd\u65b9\u6cd5\u7b80\u5355\u6613\u7528\uff0c\u4f46\u53ef\u80fd\u4f1a\u5f71\u54cd\u6027\u80fd\uff0c\u56e0\u4e3a\u6240\u6709\u64cd\u4f5c\u90fd\u4f1a\u88ab\u540c\u6b65\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p><strong>\u4f7f\u7528<code>CopyOnWriteArrayList<\/code><\/strong><\/p>\n<ul>\n<li>\n<p><code>CopyOnWriteArrayList<\/code>\u662f<code>java.util.concurrent<\/code>\u5305\u4e2d\u7684\u4e00\u4e2a\u7ebf\u7a0b\u5b89\u5168\u7684List\u5b9e\u73b0\u3002\u5b83\u5728\u5199\u64cd\u4f5c\u65f6\u521b\u5efa\u5e95\u5c42\u6570\u7ec4\u7684\u65b0\u526f\u672c\uff0c\u786e\u4fdd\u7ebf\u7a0b\u5b89\u5168\uff0c\u9002\u7528\u4e8e\u8bfb\u591a\u5199\u5c11\u7684\u573a\u666f\u3002<\/p>\n<\/li>\n<li>\n<p>\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<pre><code class=\"language-java\">import java.util.List;\nimport java.util.concurrent.CopyOnWriteArrayList;\n\npublic class CopyOnWriteArrayListExample {\n public static void main(String[] args) {\n     List<String> copyOnWriteArrayList = new CopyOnWriteArrayList<>();\n\n     \/\/ \u6dfb\u52a0\u5143\u7d20\n     copyOnWriteArrayList.add(\"element1\");\n     copyOnWriteArrayList.add(\"element2\");\n\n     \/\/ \u8bbf\u95ee\u5143\u7d20\n     String element = copyOnWriteArrayList.get(0);\n     System.out.println(element);\n }\n}<\/code><\/pre>\n<\/li>\n<li>\n<p>\u8fd9\u79cd\u65b9\u6cd5\u5728\u5199\u64cd\u4f5c\u65f6\u4f1a\u6709\u989d\u5916\u7684\u5f00\u9500\uff0c\u4f46\u5728\u8bfb\u64cd\u4f5c\u65f6\u6027\u80fd\u8f83\u597d\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p><strong>\u4f7f\u7528<code>Collections.synchronizedSet()<\/code>\u548c<code>Collections.synchronizedMap()<\/code><\/strong><\/p>\n<ul>\n<li>\n<p>\u7c7b\u4f3c\u5730\uff0c<code>Collections<\/code>\u7c7b\u8fd8\u63d0\u4f9b\u4e86<code>synchronizedSet()<\/code>\u548c<code>synchronizedMap()<\/code>\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5c06<code>Set<\/code>\u548c<code>Map<\/code>\u5305\u88c5\u6210\u7ebf\u7a0b\u5b89\u5168\u7684\u96c6\u5408\u3002<\/p>\n<\/li>\n<li>\n<p>\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<pre><code class=\"language-java\">import java.util.Collections;\nimport java.util.HashSet;\nimport java.util.Map;\nimport java.util.Set;\nimport java.util.HashMap;\n\npublic class ThreadSafeSetAndMapExample {\n public static void main(String[] args) {\n     Set<String> synchronizedSet = Collections.synchronizedSet(new HashSet<>());\n     Map<String, String> synchronizedMap = Collections.synchronizedMap(new HashMap<>());\n\n     \/\/ \u6dfb\u52a0\u5143\u7d20\n     synchronizedSet.add(\"element1\");\n     synchronizedMap.put(\"key1\", \"value1\");\n\n     \/\/ \u8bbf\u95ee\u5143\u7d20\n     String setElement = synchronizedSet.iterator().next();\n     String mapValue = synchronizedMap.get(\"key1\");\n     System.out.println(setElement);\n     System.out.println(mapValue);\n }\n}<\/code><\/pre>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p><strong>\u4f7f\u7528<code>java.util.concurrent<\/code>\u5305\u4e2d\u7684\u96c6\u5408\u7c7b<\/strong><\/p>\n<ul>\n<li>\n<p><code>java.util.concurrent<\/code>\u5305\u4e2d\u63d0\u4f9b\u4e86\u591a\u79cd\u7ebf\u7a0b\u5b89\u5168\u7684\u96c6\u5408\u7c7b\uff0c\u5982<code>ConcurrentHashMap<\/code>\u3001<code>ConcurrentLinkedQueue<\/code>\u3001<code>ConcurrentSkipListSet<\/code>\u7b49\u3002\u8fd9\u4e9b\u96c6\u5408\u7c7b\u5728\u8bbe\u8ba1\u4e0a\u8003\u8651\u4e86\u5e76\u53d1\u6027\u80fd\uff0c\u901a\u5e38\u6bd4\u4f7f\u7528<code>Collections.synchronizedXXX()<\/code>\u65b9\u6cd5\u66f4\u9ad8\u6548\u3002<\/p>\n<\/li>\n<li>\n<p>\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<pre><code class=\"language-java\">import java.util.concurrent.ConcurrentHashMap;\nimport java.util.concurrent.ConcurrentLinkedQueue;\nimport java.util.concurrent.ConcurrentSkipListSet;\n\npublic class ConcurrentCollectionsExample {\n public static void main(String[] args) {\n     ConcurrentHashMap<String, String> concurrentHashMap = new ConcurrentHashMap<>();\n     ConcurrentLinkedQueue<String> concurrentLinkedQueue = new ConcurrentLinkedQueue<>();\n     ConcurrentSkipListSet<String> concurrentSkipListSet = new ConcurrentSkipListSet<>();\n\n     \/\/ \u6dfb\u52a0\u5143\u7d20\n     concurrentHashMap.put(\"key1\", \"value1\");\n     concurrentLinkedQueue.add(\"element1\");\n     concurrentSkipListSet.add(\"element1\");\n\n     \/\/ \u8bbf\u95ee\u5143\u7d20\n     String mapValue = concurrentHashMap.get(\"key1\");\n     String queueElement = concurrentLinkedQueue.poll();\n     String setElement = concurrentSkipListSet.first();\n     System.out.println(mapValue);\n     System.out.println(queueElement);\n     System.out.println(setElement);\n }\n}<\/code><\/pre>\n<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h1>HashMap\u539f\u7406<\/h1>\n<p>HashMap\u662f\u57fa\u4e8e\u6570\u7ec4\u52a0+\u94fe\u8868\/\u7ea2\u9ed1\u6811\u7684\u7ed3\u6784\u5b9e\u73b0\u7684<\/p>\n<p><code>HashMap<\/code>\u786e\u5b9e\u662f\u57fa\u4e8e\u6570\u7ec4\u548c\u94fe\u8868\uff08\u6216\u7ea2\u9ed1\u6811\uff09\u7684\u7ed3\u6784\u5b9e\u73b0\u7684\u3002\u6570\u7ec4\u7684\u6bcf\u4e2a\u5143\u7d20\u79f0\u4e3a\u201c\u6876\u201d\uff08Bucket\uff09\uff0c\u6bcf\u4e2a\u6876\u53ef\u4ee5\u5b58\u50a8\u4e00\u4e2a\u94fe\u8868\uff08\u6216\u7ea2\u9ed1\u6811\uff09\u7684\u5934\u8282\u70b9\uff0c\u901a\u8fc7\u5bf9key\u7684\u54c8\u5e0c\u8fd0\u7b97\u7684\u5f97\u5230\u6570\u7ec4\u7684\u7d22\u5f15\u4f4d\u7f6e\u5373\u5b58\u50a8\u5728\u54ea\u4e2a\u6876\u4e2d\uff0c\u5982\u679c\u6876\u4e2d\u4e3a\u7a7a\u5219\u76f4\u63a5\u63d2\u5165\uff0c\u5982\u679c\u4e0d\u4e3a\u7a7a\u4f1a\u5bf9key\u8fdb\u884c\u6bd4\u8f83\uff0c\u4e0d\u76f8\u540c\u4f1a\u5728\u94fe\u8868\u672b\u5c3e\u8fdb\u884c\u63d2\u5165\uff0c\u76f8\u540c\u7684\u8bdd\u5219\u4f1a\u8986\u76d6\u539f\u6709\u7684\u503c\uff0c\u4e4b\u540e\u4f1a\u5bf9\u94fe\u8868\u5143\u7d20\u8fdb\u884c\u5224\u65ad\uff0c\u957f\u5ea6\u5927\u4e8e\u9608\u503c\uff08\u9ed8\u8ba4\u662f8\uff09\u7684\u8bdd\u4f1a\u8f6c\u53d8\u6210\u7ea2\u9ed1\u6811\uff0c\u540c\u6837\u7ea2\u9ed1\u6811\u4e2d\u5982\u679c\u5143\u7d20\u5c0f\u4e8e\u9608\u503c\uff086\uff09\u4f1a\u9000\u5316\u6210\u94fe\u8868\u3002<code>HashMap<\/code>\u7684\u8d1f\u8f7d\u56e0\u5b50\uff08Load Factor\uff09\u9ed8\u8ba4\u4e3a0.75\u3002\u5f53<code>HashMap<\/code>\u4e2d\u7684\u5143\u7d20\u6570\u91cf\u8d85\u8fc7\u8d1f\u8f7d\u56e0\u5b50\u4e58\u4ee5\u5bb9\u91cf\u65f6\uff0c\u4f1a\u89e6\u53d1\u6269\u5bb9\u64cd\u4f5c\u3002<\/p>\n<h1>JVM\u5185\u5b58\u6a21\u578b<\/h1>\n<p>\u4e3b\u8981\u5206\u6210\u8fd9\u51e0\u5757<\/p>\n<ul>\n<li>\u65b9\u6cd5\u533a\uff08\u6c38\u4e45\u4ee3\/\u5143\u7a7a\u95f4\uff09\uff1a\u7c7b\u578b\u4fe1\u606f\u3001\u9759\u6001\u53d8\u91cf\u3001\u5e38\u91cf\u3001\u5373\u65f6\u7f16\u8bd1\u540e\u7684\u4ea7\u7269<\/li>\n<li>\u5806\uff1a\u5bf9\u8c61\u548c\u6570\u7ec4<\/li>\n<li>\u865a\u62df\u673a\u6808\uff1a\u5b58\u653e\u7684\u662fjvm\u4e2d\u4e00\u6b21\u6b21\u7684\u65b9\u6cd5\u8c03\u7528<\/li>\n<li>\u7a0b\u5e8f\u8ba1\u6570\u5668\uff1a\u5b58\u653e\u7684\u662f\u4e0b\u4e00\u6761\u6307\u4ee4\u7684\u5730\u5740<\/li>\n<li>\u672c\u5730\u65b9\u6cd5\u6808\uff1a\u5b58\u653e\u7684\u662f\u672c\u5730\u65b9\u6cd5\u7684\u8c03\u7528<\/li>\n<\/ul>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/image.eastfond.com\/file\/1746683662166_20250508135410040.webp'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/image.eastfond.com\/file\/1746683662166_20250508135410040.webp\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"jdk8\u7684\u5185\u5b58\u5206\u5e03\u56fe\" \/><\/div><\/p>\n<h1>JVM\u5783\u573e\u56de\u6536\u7b97\u6cd5<\/h1>\n<p>\u8fd9\u91cc\u95ee\u4e86\u6240\u6709\u7684\u5783\u573e\u56de\u6536\u7b97\u6cd5\uff0c\u6211\u76f4\u63a5\u653e<a href=\"https:\/\/notebook.easitch.com\/pages\/93f9fa\/#%E6%A0%87%E8%AE%B0%E9%98%B6%E6%AE%B5-%E5%BC%95%E7%94%A8%E8%AE%A1%E6%95%B0%E7%AE%97%E6%B3%95\">\u7b14\u8bb0<\/a>\u7684\u94fe\u63a5\u4e86\u3002<\/p>\n<h1>G1\u5783\u573e\u56de\u6536\u5668<\/h1>\n<p>\u540c\u6837\u653e<a href=\"https:\/\/notebook.easitch.com\/pages\/42152b\/#%E4%B8%BA%E4%BB%80%E4%B9%88%E8%BF%98%E9%9C%80%E8%A6%81-g1\">\u94fe\u63a5<\/a>\u4e86\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>ArrayList\u3001LinkedList\u7684\u533a\u522b\u662f\u4ec0\u4e48 ArrayList\u662f\u57fa\u4e8e\u6570\u7ec4\u5b9e\u73b0\u7684\uff0c\u800cLinkedLis [&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":[32],"class_list":["post-67","post","type-post","status-publish","format-standard","hentry","category-interview","tag-32"],"_links":{"self":[{"href":"https:\/\/blog.eastfond.com\/index.php?rest_route=\/wp\/v2\/posts\/67","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.eastfond.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.eastfond.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.eastfond.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.eastfond.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=67"}],"version-history":[{"count":7,"href":"https:\/\/blog.eastfond.com\/index.php?rest_route=\/wp\/v2\/posts\/67\/revisions"}],"predecessor-version":[{"id":429,"href":"https:\/\/blog.eastfond.com\/index.php?rest_route=\/wp\/v2\/posts\/67\/revisions\/429"}],"wp:attachment":[{"href":"https:\/\/blog.eastfond.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=67"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.eastfond.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=67"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.eastfond.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=67"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}