{"id":86510,"date":"2026-07-28T20:16:42","date_gmt":"2026-07-28T12:16:42","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/86510.html"},"modified":"2026-07-28T20:16:42","modified_gmt":"2026-07-28T12:16:42","slug":"java%e9%9b%86%e5%90%88%ef%bc%9alist%e5%ae%9e%e7%8e%b0%e7%b1%bb%e6%b7%b1%e5%ba%a6%e5%af%b9%e6%af%94","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/86510.html","title":{"rendered":"Java\u96c6\u5408\uff1aList\u5b9e\u73b0\u7c7b\u6df1\u5ea6\u5bf9\u6bd4"},"content":{"rendered":"<p>\u9762\u8bd5\u5b98\u901a\u8fc7\u8fd9\u9053\u9898\u4e3b\u8981\u60f3\u8003\u5bdf\u4f60&#xff1a;<\/p>\n<li>\u5bf9 Java \u96c6\u5408\u6846\u67b6\u7684\u6574\u4f53\u7406\u89e3\u548c\u4f53\u7cfb\u5316\u8ba4\u77e5\u3002<\/li>\n<li>\u80fd\u5426\u51c6\u786e\u8bf4\u51fa\u4e0d\u540c List \u5b9e\u73b0\u7c7b\u7684\u5e95\u5c42\u6570\u636e\u7ed3\u6784\u3001\u65f6\u95f4\u590d\u6742\u5ea6\u4e0e\u6027\u80fd\u7279\u70b9\u3002<\/li>\n<li>\u7ebf\u7a0b\u5b89\u5168\u4e0e\u6027\u80fd\u4e4b\u95f4\u7684\u6743\u8861\u601d\u8def&#xff0c;\u4ee5\u53ca fail\u2011fast \/ fail\u2011safe \u673a\u5236\u7684\u533a\u522b\u3002<\/li>\n<li>\u5bf9\u5173\u952e\u6e90\u7801&#xff08;\u5982\u6269\u5bb9\u7b97\u6cd5\u3001modCount\u3001copy\u2011on\u2011write&#xff09;\u7684\u6df1\u5165\u7a0b\u5ea6\u3002<\/li>\n<li>\u5728\u771f\u5b9e\u9879\u76ee\u6216\u4e3b\u6d41\u6846\u67b6\u4e2d\u6309\u573a\u666f\u9009\u578b\u7684\u80fd\u529b\u3002<\/li>\n<h3>\u4e00\u3001\u6807\u51c6\u56de\u7b54<\/h3>\n<p>List \u63a5\u53e3\u662f Java \u96c6\u5408\u6846\u67b6\u7684\u4e09\u5927\u6838\u5fc3\u63a5\u53e3\u4e4b\u4e00&#xff08;\u53e6\u5916\u4e24\u4e2a\u662f Set \u548c Map&#xff09;&#xff0c;\u4ee3\u8868\u4e00\u4e2a\u6709\u5e8f\u3001\u53ef\u91cd\u590d\u7684\u5143\u7d20\u5e8f\u5217\u3002\u5e38\u7528\u7684 List \u5b9e\u73b0\u7c7b\u5305\u62ec&#xff1a;<\/p>\n<ul>\n<li>ArrayList&#xff1a;\u57fa\u4e8e\u52a8\u6001\u6570\u7ec4&#xff08;Object[]&#xff09;&#xff0c;\u652f\u6301\u5feb\u901f\u968f\u673a\u8bbf\u95ee&#xff08;O(1)&#xff09;&#xff0c;\u975e\u5c3e\u90e8\u589e\u5220\u9700\u8981\u79fb\u52a8\u5143\u7d20&#xff08;\u5e73\u5747 O(n)&#xff09;&#xff0c;\u7ebf\u7a0b\u4e0d\u5b89\u5168&#xff0c;\u4f46\u904d\u5386\u6548\u7387\u9ad8&#xff0c;\u662f\u65e5\u5e38\u5f00\u53d1\u9996\u9009\u3002<\/li>\n<li>LinkedList&#xff1a;\u57fa\u4e8e\u53cc\u5411\u94fe\u8868&#xff08;Node \u8282\u70b9&#xff09;&#xff0c;\u4e24\u7aef\u7684\u589e\u5220\u590d\u6742\u5ea6\u4e3a O(1)&#xff0c;\u67e5\u8be2\u4e3a O(n)&#xff0c;\u540c\u65f6\u5b9e\u73b0\u4e86 Deque \u63a5\u53e3&#xff0c;\u53ef\u5f53\u4f5c\u961f\u5217\u3001\u6808\u3001\u53cc\u7aef\u961f\u5217\u4f7f\u7528\u3002<\/li>\n<li>Vector&#xff1a;\u53e4\u8001\u7684\u7ebf\u7a0b\u5b89\u5168\u5bb9\u5668&#xff0c;\u6240\u6709\u65b9\u6cd5\u90fd\u7528 synchronized \u4fee\u9970&#xff0c;\u6027\u80fd\u6781\u4f4e&#xff0c;\u5b98\u65b9\u5df2\u660e\u786e\u5efa\u8bae\u5f03\u7528\u3002<\/li>\n<li>Stack&#xff1a;\u7ee7\u627f\u81ea Vector&#xff0c;\u6a21\u62df\u6808\u7ed3\u6784&#xff0c;\u540c\u6837\u4e0d\u63a8\u8350\u4f7f\u7528&#xff0c;\u5e94\u6539\u7528 Deque \u7684\u5b9e\u73b0\u3002<\/li>\n<li>CopyOnWriteArrayList&#xff1a;\u5e76\u53d1\u5bb9\u5668&#xff0c;\u5199\u64cd\u4f5c\u4f1a\u590d\u5236\u6574\u4e2a\u5e95\u5c42\u6570\u7ec4&#xff08;\u5199\u65f6\u590d\u5236&#xff09;&#xff0c;\u8bfb\u64cd\u4f5c\u5b8c\u5168\u65e0\u9501&#xff0c;\u9002\u5408\u201c\u8bfb\u591a\u5199\u5c11\u201d\u7684\u5e76\u53d1\u573a\u666f\u3002<\/li>\n<li>\u540c\u6b65\u5305\u88c5\u5668&#xff1a;\u901a\u8fc7 Collections.synchronizedList \u53ef\u4ee5\u5c06\u4efb\u4f55 List \u5305\u88c5\u6210\u7ebf\u7a0b\u5b89\u5168\u7684\u89c6\u56fe&#xff0c;\u4f46\u904d\u5386\u65f6\u4ecd\u9700\u624b\u52a8\u540c\u6b65\u3002<\/li>\n<\/ul>\n<h3>\u4e8c\u3001\u6838\u5fc3\u539f\u7406<\/h3>\n<p>\u4e0b\u56fe\u4ece\u5e95\u5c42\u6570\u636e\u7ed3\u6784\u3001\u6269\u5bb9\u673a\u5236\u3001\u7ebf\u7a0b\u5b89\u5168\u53ca\u8fed\u4ee3\u5668\u884c\u4e3a\u56db\u4e2a\u7ef4\u5ea6\u5bf9\u4e3b\u6d41\u5b9e\u73b0\u7c7b\u8fdb\u884c\u5bf9\u6bd4&#xff1a;<\/p>\n<table border=\"1\">\n<tr>\u5b9e\u73b0\u7c7b\u5e95\u5c42\u7ed3\u6784\u6269\u5bb9\u673a\u5236 \/ \u5185\u5b58\u7ba1\u7406\u7ebf\u7a0b\u5b89\u5168\u8fed\u4ee3\u5668\u7c7b\u578b<\/tr>\n<tbody>\n<tr>\n<td>ArrayList<\/td>\n<td>Object[] \u6570\u7ec4<\/td>\n<td>\u9ed8\u8ba4\u5bb9\u91cf 10&#xff0c;\u6bcf\u6b21\u6269\u5bb9\u4e3a\u539f\u5bb9\u91cf\u7684 1.5 \u500d&#xff08;\u6e90\u7801\u4e2d oldCapacity &#043; (oldCapacity &gt;&gt; 1)&#xff09;&#xff0c;\u6269\u5bb9\u65f6\u4f1a\u590d\u5236\u6574\u4e2a\u6570\u7ec4\u3002<\/td>\n<td>\u5426<\/td>\n<td>fail\u2011fast<\/td>\n<\/tr>\n<tr>\n<td>LinkedList<\/td>\n<td>\u53cc\u5411\u94fe\u8868 Node&#xff08;\u542b prev\u3001item\u3001next&#xff09;<\/td>\n<td>\u65e0\u5bb9\u91cf\u9650\u5236&#xff0c;\u6bcf\u4e2a\u8282\u70b9\u6709\u989d\u5916\u7684\u5f15\u7528\u5f00\u9500&#xff08;\u7ea6 24 \u5b57\u8282\/\u8282\u70b9&#xff09;\u3002<\/td>\n<td>\u5426<\/td>\n<td>fail\u2011fast<\/td>\n<\/tr>\n<tr>\n<td>Vector<\/td>\n<td>Object[] \u6570\u7ec4<\/td>\n<td>\u9ed8\u8ba4 10&#xff0c;\u53ef\u81ea\u5b9a\u4e49\u6269\u5bb9\u589e\u91cf&#xff1b;\u6269\u5bb9\u65f6\u53ef\u7528 capacityIncrement \u63a7\u5236\u6b65\u957f\u3002<\/td>\n<td>\u662f&#xff08;synchronized \u65b9\u6cd5&#xff09;<\/td>\n<td>fail\u2011fast<\/td>\n<\/tr>\n<tr>\n<td>CopyOnWriteArrayList<\/td>\n<td>Object[] \u6570\u7ec4<\/td>\n<td>\u6bcf\u6b21\u5199\u5165\u90fd Arrays.copyOf \u521b\u5efa\u65b0\u6570\u7ec4&#xff0c;\u65e7\u6570\u7ec4\u5728\u8fed\u4ee3\u7ed3\u675f\u540e\u88ab GC \u56de\u6536\u3002<\/td>\n<td>\u662f&#xff08;\u5199\u65f6\u52a0 ReentrantLock&#xff0c;\u8bfb\u65e0\u9501&#xff09;<\/td>\n<td>\u5feb\u7167\u5f0f&#xff08;fail\u2011safe&#xff09;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>LinkedList \u8282\u70b9\u7ed3\u6784&#xff1a;<\/p>\n<p>private static class Node&lt;E&gt; {<br \/>\n    E item;<br \/>\n    Node&lt;E&gt; next;<br \/>\n    Node&lt;E&gt; prev;<br \/>\n    Node(Node&lt;E&gt; prev, E element, Node&lt;E&gt; next) {<br \/>\n        this.item &#061; element;<br \/>\n        this.next &#061; next;<br \/>\n        this.prev &#061; prev;<br \/>\n    }<br \/>\n}<\/p>\n<p>CopyOnWriteArrayList \u5199\u64cd\u4f5c\u5173\u952e\u903b\u8f91&#xff1a;<\/p>\n<p>public boolean add(E e) {<br \/>\n    final ReentrantLock lock &#061; this.lock;<br \/>\n    lock.lock();<br \/>\n    try {<br \/>\n        Object[] elements &#061; getArray();<br \/>\n        int len &#061; elements.length;<br \/>\n        Object[] newElements &#061; Arrays.copyOf(elements, len &#043; 1);<br \/>\n        newElements[len] &#061; e;<br \/>\n        setArray(newElements);<br \/>\n        return true;<br \/>\n    } finally {<br \/>\n        lock.unlock();<br \/>\n    }<br \/>\n}<\/p>\n<p>\u6b64\u5916&#xff0c;\u6240\u6709\u7ebf\u7a0b\u4e0d\u5b89\u5168\u7684 List \u90fd\u4f9d\u8d56 modCount \u5b57\u6bb5\u8bb0\u5f55\u7ed3\u6784\u4fee\u6539\u6b21\u6570\u3002\u6bcf\u5f53 List \u53d1\u751f\u7ed3\u6784\u4fee\u6539&#xff08;add\/remove\/clear \u7b49\u6539\u53d8\u5143\u7d20\u6570\u91cf\u7684\u64cd\u4f5c&#xff09;&#xff0c;modCount \u5c31\u4f1a\u81ea\u589e 1\u3002\u8fed\u4ee3\u5668\u5728\u521b\u5efa\u65f6\u4f1a\u7528 expectedModCount \u5b57\u6bb5\u4fdd\u5b58\u5f53\u65f6\u7684 modCount \u503c&#xff0c;\u4e4b\u540e\u6bcf\u6b21\u6267\u884c next()\u3001remove() \u7b49\u64cd\u4f5c\u524d&#xff0c;\u90fd\u4f1a\u8c03\u7528 checkForComodification() \u65b9\u6cd5\u6bd4\u5bf9\u4e24\u8005\u662f\u5426\u4e00\u81f4\u2014\u2014\u82e5\u4e0d\u4e00\u81f4\u5219\u7acb\u5373\u629b\u51fa ConcurrentModificationException&#xff0c;\u8fd9\u5c31\u662f fail\u2011fast \u673a\u5236\u3002<\/p>\n<p>\u4ee5 ArrayList \u5185\u90e8\u7c7b Itr \u4e3a\u4f8b&#xff0c;\u6838\u5fc3\u68c0\u67e5\u903b\u8f91\u5982\u4e0b&#xff1a;<\/p>\n<p>private class Itr implements Iterator&lt;E&gt; {<br \/>\n    int cursor;              \/\/ \u4e0b\u4e00\u4e2a\u8fd4\u56de\u5143\u7d20\u7684\u7d22\u5f15<br \/>\n    int lastRet &#061; -1;        \/\/ \u4e0a\u4e00\u6b21\u8fd4\u56de\u5143\u7d20\u7684\u7d22\u5f15&#xff0c;-1 \u8868\u793a\u521a\u5220\u9664<br \/>\n    int expectedModCount &#061; modCount;  \/\/ \u521b\u5efa\u65f6\u5feb\u7167<\/p>\n<p>    final void checkForComodification() {<br \/>\n        if (modCount !&#061; expectedModCount)<br \/>\n            throw new ConcurrentModificationException();<br \/>\n    }<\/p>\n<p>    public E next() {<br \/>\n        checkForComodification();  \/\/ \u6bcf\u6b21\u53d6\u5143\u7d20\u524d\u68c0\u67e5<br \/>\n        int i &#061; cursor;<br \/>\n        if (i &gt;&#061; size)<br \/>\n            throw new NoSuchElementException();<br \/>\n        Object[] elementData &#061; ArrayList.this.elementData;<br \/>\n        if (i &gt;&#061; elementData.length)<br \/>\n            throw new ConcurrentModificationException();<br \/>\n        cursor &#061; i &#043; 1;<br \/>\n        return (E) elementData[lastRet &#061; i];<br \/>\n    }<\/p>\n<p>    public void remove() {<br \/>\n        if (lastRet &lt; 0)<br \/>\n            throw new IllegalStateException();<br \/>\n        checkForComodification();  \/\/ \u5220\u9664\u524d\u4e5f\u68c0\u67e5<br \/>\n        try {<br \/>\n            ArrayList.this.remove(lastRet);<br \/>\n            cursor &#061; lastRet;<br \/>\n            lastRet &#061; -1;<br \/>\n            expectedModCount &#061; modCount;  \/\/ \u8fed\u4ee3\u5668\u81ea\u5df1\u7684 remove \u4f1a\u540c\u6b65<br \/>\n        } catch (IndexOutOfBoundsException ex) {<br \/>\n            throw new ConcurrentModificationException();<br \/>\n        }<br \/>\n    }<br \/>\n}<\/p>\n<p>\u6ce8\u610f&#xff1a;\u8fed\u4ee3\u5668\u81ea\u8eab\u7684 remove() \u65b9\u6cd5\u5728\u5220\u9664\u5143\u7d20\u540e&#xff0c;\u4f1a\u91cd\u65b0\u540c\u6b65 expectedModCount &#061; modCount&#xff0c;\u56e0\u6b64\u53ea\u6709\u4f7f\u7528\u8fed\u4ee3\u5668\u81ea\u5df1\u7684 remove \u624d\u662f\u5b89\u5168\u7684&#xff1b;\u5982\u679c\u5728\u8fed\u4ee3\u8fc7\u7a0b\u4e2d\u76f4\u63a5\u8c03\u7528 list.remove()&#xff0c;\u53ea\u4f1a\u4fee\u6539\u5916\u90e8\u7684 modCount&#xff0c;\u8fed\u4ee3\u5668\u5185\u90e8\u7684 expectedModCount \u4e0d\u4f1a\u540c\u6b65&#xff0c;\u4e0b\u6b21 next() \u5c31\u4f1a\u89e6\u53d1\u5f02\u5e38\u3002<\/p>\n<h3>\u4e09\u3001\u5e94\u7528\u573a\u666f<\/h3>\n<p>\u65e5\u5e38\u5f00\u53d1\u7684\u9009\u62e9\u539f\u5219&#xff1a;<\/p>\n<ul>\n<li>ArrayList&#xff1a;\u9002\u7528\u4e8e\u9891\u7e41\u968f\u673a\u67e5\u8be2\u3001\u904d\u5386\u7684\u573a\u666f&#xff0c;\u4f8b\u5982\u5217\u8868\u9875\u5c55\u793a\u3001\u6570\u636e\u5bfc\u51fa\u3001\u6279\u91cf\u5904\u7406\u3002\u5927\u591a\u6570\u4e1a\u52a1\u4ee3\u7801\u4e2d&#xff0c;\u53ea\u8981\u6ca1\u6709\u7279\u6b8a\u9700\u6c42&#xff0c;\u76f4\u63a5\u4f7f\u7528 ArrayList \u5373\u53ef\u3002<\/li>\n<li>LinkedList&#xff1a;\u9002\u5408\u9700\u8981\u5927\u91cf\u5934\u5c3e\u63d2\u5165\/\u5220\u9664&#xff0c;\u6216\u9700\u8981\u961f\u5217\/\u6808\u8bed\u4e49\u7684\u573a\u666f&#xff0c;\u4f8b\u5982\u6d88\u606f\u7f13\u51b2\u961f\u5217\u3001LRU \u7f13\u5b58&#xff08;\u5229\u7528\u5934\u5c3e\u5feb\u901f\u5220\u9664\u65e7\u5143\u7d20&#xff09;\u3001\u9012\u5f52\u6808\u6a21\u62df\u3002\u4f46\u8981\u6ce8\u610f&#xff0c;\u5927\u90e8\u5206\u60c5\u51b5\u4e0b ArrayList \u7684\u5c3e\u63d2\u6548\u7387\u5e76\u4e0d\u6bd4 LinkedList \u5dee&#xff0c;\u56e0\u4e3a ArrayList \u7684\u6279\u91cf\u6570\u636e\u79fb\u52a8\u4f1a\u53d7\u76ca\u4e8e\u73b0\u4ee3 CPU \u7684\u7f13\u5b58\u884c\u3002<\/li>\n<li>CopyOnWriteArrayList&#xff1a;\u9002\u5408\u201c\u8bfb\u591a\u5199\u5c11\u201d\u7684\u5e76\u53d1\u573a\u666f&#xff0c;\u4f8b\u5982\u7cfb\u7edf\u767d\u540d\u5355\/\u9ed1\u540d\u5355\u7f13\u5b58\u3001\u4e8b\u4ef6\u76d1\u542c\u5668\u5217\u8868\u3001\u914d\u7f6e\u4e2d\u5fc3\u4e2d\u52a0\u8f7d\u7684\u914d\u7f6e\u9879\u96c6\u5408\u3002<\/li>\n<\/ul>\n<p>\u4e3b\u6d41\u6846\u67b6\u4e2d\u7684\u843d\u5730\u6848\u4f8b&#xff1a;<\/p>\n<ul>\n<li>Spring&#xff1a;BeanPostProcessor\u3001ApplicationListener \u7b49\u76d1\u542c\u5668\u5217\u8868\u5185\u90e8\u4f7f\u7528 CopyOnWriteArrayList \u5b58\u50a8&#xff0c;\u65e2\u4fdd\u8bc1\u7ebf\u7a0b\u5b89\u5168&#xff0c;\u53c8\u5141\u8bb8\u5927\u91cf\u8bfb\u64cd\u4f5c\u65e0\u9501\u6267\u884c\u3002<\/li>\n<li>MyBatis&#xff1a;\u7ed3\u679c\u96c6\u6620\u5c04\u65f6&#xff0c;\u4f7f\u7528 ArrayList \u5b58\u653e\u6bcf\u4e00\u884c\u7684\u7ed3\u679c\u5bf9\u8c61&#xff0c;\u5229\u7528\u5176\u987a\u5e8f\u5b58\u50a8\u548c\u5feb\u901f\u904d\u5386\u7279\u6027\u3002<\/li>\n<li>RocketMQ&#xff1a;\u6d88\u606f\u5b58\u50a8\u7684\u961f\u5217\u7ba1\u7406\u3001\u6d88\u8d39\u8fdb\u5ea6\u4e0b\u6807\u7ef4\u62a4\u5927\u91cf\u4f7f\u7528 ArrayList\u3002<\/li>\n<li>Java ClassLoader&#xff1a;\u6bcf\u4e2a ClassLoader \u5728\u52a0\u8f7d\u7c7b\u65f6\u4f1a\u628a\u5df2\u52a0\u8f7d\u7684\u7c7b\u7f13\u5b58\u5230 ArrayList \u4e2d&#xff0c;\u4ee5\u4fbf\u5feb\u901f\u67e5\u627e\u3002<\/li>\n<li>HikariCP \u8fde\u63a5\u6c60&#xff1a;\u4f7f\u7528 CopyOnWriteArrayList \u4fdd\u5b58\u8fde\u63a5\u72b6\u6001\u5feb\u7167&#xff0c;\u51cf\u5c11\u9501\u7ade\u4e89\u3002<\/li>\n<\/ul>\n<h3>\u56db\u3001\u4f7f\u7528\u65b9\u5f0f<\/h3>\n<p>\u4ee5\u4e0b\u4ee3\u7801\u8986\u76d6\u5404\u5b9e\u73b0\u7c7b\u7684\u5e38\u89c1\u64cd\u4f5c\u4e0e\u5e76\u53d1\u6ce8\u610f\u4e8b\u9879\u3002<\/p>\n<p>\/\/ &#061;&#061;&#061;&#061;&#061; ArrayList \u57fa\u672c\u4f7f\u7528\u4e0e\u904d\u5386\u6027\u80fd\u5bf9\u6bd4 &#061;&#061;&#061;&#061;&#061;<br \/>\nList&lt;String&gt; list &#061; new ArrayList&lt;&gt;();<br \/>\nlist.add(&#034;A&#034;);<br \/>\nlist.add(&#034;B&#034;);<br \/>\nlist.add(1, &#034;C&#034;);           \/\/ \u6307\u5b9a\u4f4d\u7f6e\u63d2\u5165<br \/>\nString item &#061; list.get(0);  \/\/ O(1)<br \/>\nlist.remove(1);             \/\/ \u5220\u9664&#xff0c;\u540e\u7eed\u5143\u7d20\u524d\u79fb<\/p>\n<p>\/\/ \u904d\u5386\u65b9\u5f0f\u6027\u80fd\u5bf9\u6bd4&#xff08;ArrayList \u5b9e\u73b0\u4e86 RandomAccess&#xff0c;\u63a8\u8350\u666e\u901a for&#xff09;<br \/>\nfor (int i &#061; 0; i &lt; list.size(); i&#043;&#043;) { &#8230; }        \/\/ \u6700\u5feb<br \/>\nfor (String s : list) { &#8230; }                        \/\/ \u4e2d\u7b49<br \/>\nlist.forEach(System.out::println);                   \/\/ \u4e2d\u7b49<br \/>\nIterator&lt;String&gt; it &#061; list.iterator();<br \/>\nwhile (it.hasNext()) { it.next(); }                  \/\/ \u6b21\u4e8e\u666e\u901a for<\/p>\n<p>\/\/ \u6279\u91cf\u64cd\u4f5c\u793a\u4f8b<br \/>\nlist.addAll(Arrays.asList(&#034;D&#034;, &#034;E&#034;, &#034;F&#034;));<br \/>\nlist.sort(String::compareTo);                        \/\/ lambda \u6bd4\u8f83\u5668<br \/>\nList&lt;String&gt; sub &#061; list.subList(0, 3);               \/\/ \u89c6\u56fe&#xff0c;\u4fee\u6539\u4f1a\u540c\u6b65\u56de\u539f\u5217\u8868<\/p>\n<p>\/\/ \u5b89\u5168\u5220\u9664\u5143\u7d20&#xff08;\u4e0d\u80fd\u5728 foreach \u4e2d\u76f4\u63a5 list.remove&#xff09;<br \/>\nit &#061; list.iterator();<br \/>\nwhile (it.hasNext()) {<br \/>\n    String s &#061; it.next();<br \/>\n    if (s.equals(&#034;B&#034;)) {<br \/>\n        it.remove();                                 \/\/ \u6b63\u786e\u7528\u6cd5<br \/>\n    }<br \/>\n}<\/p>\n<p>\/\/ &#061;&#061;&#061;&#061;&#061; LinkedList \u7528\u4f5c\u961f\u5217\u3001\u6808\u548c\u53cc\u7aef\u961f\u5217 &#061;&#061;&#061;&#061;&#061;<br \/>\nDeque&lt;String&gt; deque &#061; new LinkedList&lt;&gt;();<br \/>\ndeque.offerFirst(&#034;head&#034;);<br \/>\ndeque.offerLast(&#034;tail&#034;);<br \/>\nString first &#061; deque.pollFirst();   \/\/ \u5f39\u51fa\u5934\u90e8<\/p>\n<p>\/\/ \u4f5c\u4e3a\u6808\u4f7f\u7528<br \/>\ndeque.push(&#034;element&#034;);<br \/>\nString top &#061; deque.pop();<\/p>\n<p>\/\/ \u6a21\u62df LRU \u7f13\u5b58\u6dd8\u6c70&#xff08;\u5229\u7528 removeLast&#xff09;<br \/>\nLinkedHashSet&lt;String&gt; lhs &#061; new LinkedHashSet&lt;&gt;();<br \/>\n\/\/ &#8230; \u8fd9\u91cc\u4ec5\u793a\u610f\u601d\u8def&#xff0c;\u5b9e\u9645\u5e94\u7ee7\u627f LinkedHashMap<br \/>\nlhs.remove(lhs.iterator().next()); \/\/ \u5220\u9664\u6700\u8001\u5143\u7d20<\/p>\n<p>\/\/ &#061;&#061;&#061;&#061;&#061; CopyOnWriteArrayList \u5e76\u53d1\u573a\u666f &#061;&#061;&#061;&#061;&#061;<br \/>\nCopyOnWriteArrayList&lt;String&gt; cowList &#061; new CopyOnWriteArrayList&lt;&gt;();<br \/>\ncowList.add(&#034;item&#034;);<\/p>\n<p>\/\/ \u904d\u5386\u65f6\u65e0\u9700\u52a0\u9501&#xff0c;\u8fed\u4ee3\u5668\u6301\u6709\u5feb\u7167<br \/>\nfor (String s : cowList) {<br \/>\n    System.out.println(s);<br \/>\n    \/\/ \u8fed\u4ee3\u8fc7\u7a0b\u4e2d\u4fee\u6539\u4e0d\u5f71\u54cd\u5f53\u524d\u5feb\u7167&#xff0c;\u4f46\u4e0d\u4f1a\u7acb\u5373\u53cd\u6620\u5230\u8fed\u4ee3\u5668<br \/>\n    cowList.add(&#034;new&#034;);<br \/>\n}<br \/>\n\/\/ \u5199\u64cd\u4f5c\u7531 ReentrantLock \u4fdd\u8bc1\u4e92\u65a5&#xff0c;\u9002\u5408\u8bfb\u591a\u5199\u5c11<\/p>\n<p>\/\/ &#061;&#061;&#061;&#061;&#061; \u7ebf\u7a0b\u5b89\u5168\u5305\u88c5\u793a\u4f8b &#061;&#061;&#061;&#061;&#061;<br \/>\nList&lt;String&gt; syncList &#061; Collections.synchronizedList(new ArrayList&lt;&gt;());<br \/>\nsyncList.add(&#034;safe&#034;);<br \/>\n\/\/ \u904d\u5386\u65f6\u5fc5\u987b\u624b\u52a8\u540c\u6b65<br \/>\nsynchronized (syncList) {<br \/>\n    for (String s : syncList) {<br \/>\n        \/\/ &#8230;<br \/>\n    }<br \/>\n}<br \/>\n\/\/ \u4e0d\u63a8\u8350&#xff0c;\u6027\u80fd\u8fdc\u4e0d\u5982 CopyOnWriteArrayList \u6216 JUC \u5bb9\u5668<\/p>\n<h3>\u4e94\u3001\u6269\u5c55\u5ef6\u4f38<\/h3>\n<ul>\n<li>ArrayList \u7684 RandomAccess \u6807\u8bb0&#xff1a;ArrayList \u5b9e\u73b0\u4e86 RandomAccess \u63a5\u53e3&#xff0c;\u904d\u5386\u65f6\u4f7f\u7528\u4e0b\u6807\u5faa\u73af\u6548\u7387\u6700\u9ad8&#xff1b;LinkedList \u672a\u5b9e\u73b0\u8be5\u63a5\u53e3&#xff0c;\u5e94\u4f7f\u7528\u8fed\u4ee3\u5668\u6216 for\u2011each \u5faa\u73af&#xff0c;\u5426\u5219 O(n\u00b2) \u7684\u5669\u68a6\u3002<\/li>\n<li>subList \u9677\u9631&#xff1a;list.subList(from, to) \u8fd4\u56de\u7684\u662f\u539f\u5217\u8868\u7684\u89c6\u56fe&#xff0c;\u5bf9\u5b50\u5217\u8868\u7684\u4fee\u6539\u4f1a\u76f4\u63a5\u5f71\u54cd\u539f\u5217\u8868&#xff0c;\u4e14\u539f\u5217\u8868\u7684\u7ed3\u6784\u53d8\u5316\u4f1a\u5bfc\u81f4\u5b50\u5217\u8868\u5931\u6548\u3002\u6700\u597d\u7684\u529e\u6cd5\u5c31\u662f\u662f\u62f7\u8d1d\u5b50\u5217\u8868&#xff1a;new ArrayList&lt;&gt;(list.subList(0, 5))\u3002<\/li>\n<li>\u6392\u5e8f&#xff1a;Collections.sort(list) \u8981\u6c42\u5143\u7d20\u5b9e\u73b0 Comparable&#xff1b;list.sort(Comparator) \u66f4\u7075\u6d3b&#xff0c;\u652f\u6301 Lambda\u3002<\/li>\n<li>\u4e0d\u53ef\u53d8 List&#xff1a;Java 9 \u5f15\u5165 List.of()&#xff0c;Guava \u63d0\u4f9b ImmutableList&#xff0c;\u8fd9\u4e9b\u4e0d\u53ef\u53d8\u96c6\u5408\u7ebf\u7a0b\u5b89\u5168\u3001\u5185\u5b58\u7d27\u51d1&#xff0c;\u9002\u5408\u5e38\u91cf\u914d\u7f6e\u3002<\/li>\n<li>\u6570\u7ec4\u4e0e List \u4e92\u8f6c&#xff1a;list.toArray() \u548c Arrays.asList()\u3002\u540e\u8005\u8fd4\u56de\u7684 List \u957f\u5ea6\u56fa\u5b9a&#xff0c;\u4e0d\u53ef\u589e\u5220&#xff0c;\u4f46\u652f\u6301\u4fee\u6539\u5143\u7d20\u503c\u3002<\/li>\n<li>\u5e76\u884c\u6d41\u4e0e List&#xff1a;\u4f7f\u7528 parallelStream() \u65f6&#xff0c;\u5e95\u5c42\u5c06 List \u8f6c\u6362\u4e3a ArrayListSpliterator \u8fdb\u884c\u5206\u5272&#xff0c;\u5982\u679c\u4f7f\u7528 LinkedList \u4f1a\u5bfc\u81f4\u62c6\u5206\u6548\u7387\u6781\u4f4e&#xff0c;\u56e0\u6b64\u5e76\u884c\u6d41\u573a\u666f\u5e94\u4f18\u5148\u4f7f\u7528 ArrayList\u3002<\/li>\n<li>List \u53bb\u91cd&#xff1a;\u53ef\u7528 list.stream().distinct().collect(Collectors.toList()) \u6216\u8f6c\u6362\u4e3a LinkedHashSet&#xff0c;\u5728\u53bb\u91cd\u7684\u540c\u65f6&#xff0c;\u8fd8\u80fd\u4fdd\u8bc1\u5143\u7d20\u7684\u5b58\u50a8\u987a\u5e8f\u4e0e\u63d2\u5165\u987a\u5e8f\u4e00\u81f4\u3002<\/li>\n<\/ul>\n<h3>\u516d\u3001\u9762\u8bd5\u8ffd\u95ee<\/h3>\n<li>ArrayList \u548c LinkedList \u8c01\u66f4\u5360\u5185\u5b58&#xff1f;\u4e3a\u4ec0\u4e48&#xff1f;<br \/>\nLinkedList \u6bcf\u4e2a\u8282\u70b9\u9664\u4e86\u5b58\u50a8\u5143\u7d20\u5916&#xff0c;\u8fd8\u8981\u4fdd\u5b58 prev\/next \u4e24\u4e2a\u5f15\u7528&#xff0c;\u52a0\u4e0a\u5bf9\u8c61\u5934&#xff0c;\u6bcf\u4e2a\u8282\u70b9\u591a\u5360\u7ea6 24 \u5b57\u8282&#xff0c;\u76f8\u540c\u6570\u636e\u91cf\u4e0b LinkedList \u5185\u5b58\u5360\u7528\u7ea6\u4e3a ArrayList \u7684 3~4 \u500d\u3002<\/li>\n<li>ArrayList \u7684\u6269\u5bb9\u4e3a\u4ec0\u4e48\u662f 1.5 \u500d&#xff1f;<br \/>\n\u5728\u907f\u514d\u9891\u7e41\u6269\u5bb9&#xff08;\u6269\u5bb9\u6b21\u6570\u591a&#xff09;\u4e0e\u907f\u514d\u5185\u5b58\u6d6a\u8d39&#xff08;\u5bb9\u91cf\u8fc7\u5927&#xff09;\u4e4b\u95f4\u505a\u4e86\u6298\u4e2d\u30021.5 \u500d\u53ef\u4ee5\u4fdd\u8bc1\u5728\u5bb9\u91cf\u589e\u957f\u65f6\u9010\u6e10\u8d8b\u8fd1\u9ec4\u91d1\u6bd4\u4f8b&#xff0c;\u56de\u6536\u7684\u5185\u5b58\u788e\u7247\u4e5f\u66f4\u53ef\u63a7&#xff0c;Vector \u91c7\u7528 2 \u500d\u6269\u5bb9\u5219\u5bb9\u6613\u9020\u6210\u5185\u5b58\u6d6a\u8d39\u3002<\/li>\n<li>CopyOnWriteArrayList \u7684\u8fed\u4ee3\u5668\u4e3a\u4ec0\u4e48\u662f\u5f31\u4e00\u81f4\u6027\u7684&#xff1f;<br \/>\n\u8fed\u4ee3\u5668\u57fa\u4e8e\u521b\u5efa\u65f6\u7684\u6570\u7ec4\u5feb\u7167&#xff0c;\u540e\u7eed\u6dfb\u52a0\/\u5220\u9664\u64cd\u4f5c\u90fd\u53d1\u751f\u5728\u65b0\u7684\u6570\u7ec4\u4e0a&#xff0c;\u8fed\u4ee3\u5668\u4e0d\u4f1a\u770b\u5230\u6700\u65b0\u4fee\u6539&#xff0c;\u56e0\u6b64\u5b83\u662f\u5f31\u4e00\u81f4\u7684&#xff0c;\u4f46\u5b9e\u73b0\u4e86 fail\u2011safe\u3002<\/li>\n<li>\u4e3a\u4ec0\u4e48\u963f\u91cc\u5df4\u5df4 Java \u5f00\u53d1\u624b\u518c\u5f3a\u5236\u8981\u6c42\u4f7f\u7528 ArrayList \u65f6\u6307\u5b9a\u521d\u59cb\u5bb9\u91cf&#xff1f;<br \/>\n\u907f\u514d\u9891\u7e41\u6269\u5bb9\u5e26\u6765\u7684\u6570\u7ec4\u590d\u5236\u5f00\u9500\u548c\u9891\u7e41 GC\u3002\u82e5\u80fd\u9884\u4f30\u6570\u636e\u91cf&#xff0c;\u76f4\u63a5\u6307\u5b9a\u5bb9\u91cf\u80fd\u663e\u8457\u63d0\u5347\u6027\u80fd\u3002<\/li>\n<li>subList \u4e3a\u4ec0\u4e48\u4f1a\u5bfc\u81f4 OOM&#xff1f;<br \/>\nsubList 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