{"id":49,"date":"2025-06-24T21:13:22","date_gmt":"2025-06-24T13:13:22","guid":{"rendered":"http:\/\/192.140.166.102\/?p=49"},"modified":"2025-06-25T11:40:08","modified_gmt":"2025-06-25T03:40:08","slug":"java%e5%ad%97%e7%ac%a6%e4%b8%b2-2","status":"publish","type":"post","link":"https:\/\/lsuccess.xyz\/index.php\/2025\/06\/24\/java%e5%ad%97%e7%ac%a6%e4%b8%b2-2\/","title":{"rendered":"Java\u5b57\u7b26\u4e32"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u7ec8\u4e8e\u80fd\u7528\u535a\u5ba2\u6765\u5199\u81ea\u5df1\u7684\u77e5\u8bc6\u70b9\u4e86\uff0c\u73b0\u5728\u628a\u4e4b\u524d\u5b66\u5230\u7684\u77e5\u8bc6\u70b9\u5168\u90e8\u8865\u4e0a\u53bb<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5b57\u7b26\u4e32\u6e90\u7801\u89e3\u8bfb<\/strong><\/li>\n\n\n\n<li><strong>\u5b57\u7b26\u4e32\u5e38\u91cf\u6c60<\/strong><\/li>\n\n\n\n<li><strong>String.Bulider\u548cString.Buffer<\/strong><\/li>\n\n\n\n<li><strong>\u5b57\u7b26\u4e32\u5e38\u7528\u7684\u65b9\u6cd5<\/strong><\/li>\n\n\n\n<li><strong>\u6301\u7eed\u66f4\u65b0\u4e2d<\/strong><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u5b57\u7b26\u4e32\u6e90\u7801\u89e3\u8bfb<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7\u6e90\u7801\u6765\u5b66\u4e60\u5185\u5bb9\u662f\u6700\u76f4\u63a5\u4e86\u89e3\u5230\u5e95\u5c42\u7684\u65b9\u6cd5\uff0c\u8ba9\u6211\u4eec\u5148\u4ece\u4ece\u5b57\u7b26\u4e32\u7684\u58f0\u660e\u5f00\u59cb\u770b\uff0c\u4e4b\u540e\u5c31\u4f1a\u8fdb\u5165\u6e90\u7801\u4e2d\u4e0d\u5f97\u4e0d\u8c08\u53ca\u7684\u4e09\u4e2a\u91cd\u8981\u7684\u65b9\u6cd5<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/lsuccess.xyz\/wp-content\/uploads\/2025\/06\/image.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"712\" height=\"90\" data-original=\"http:\/\/lsuccess.xyz\/wp-content\/uploads\/2025\/06\/image.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-50\" style=\"width:814px;height:auto\"  sizes=\"auto, (max-width: 712px) 100vw, 712px\" \/><\/div><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">\u4ece\u6e90\u7801\u4e2d\u6211\u4eec\u80fd\u5f97\u5230\u4e09\u4e2a\u4fe1\u606f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9996\u5148\uff0cString \u7c7b\u662f&nbsp;<strong>fina<\/strong>l&nbsp;\u7684\uff0c\u610f\u5473\u7740\u5b83\u4e0d\u80fd\u88ab\u5b50\u7c7b\u7ee7\u627f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5176\u6b21\uff0cString \u7c7b\u5b9e\u73b0\u4e86&nbsp;Serializable \u63a5\u53e3\uff0c\u610f\u5473\u7740\u5b83\u53ef\u4ee5\u5e8f\u5217\u5316\uff08\u5e8f\u5217\u5316\u5728\u7f51\u7edc\u7f16\u7a0b\u4e2d\u7684\u4f7f\u7528\u5341\u5206\u5e7f\u53d1\uff0c\u53ef\u4ee5\u8bf4\u5728\u7f51\u7edc\u901a\u4fe1\u7f16\u7a0b\u4e2d\u4f20\u9012\u6570\u636e\u90fd\u4f1a\u8981\u6c42\u6570\u636e\u80fd\u591f\u88ab\u5e8f\u5217\u5316\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u540e\uff0cString \u7c7b\u5b9e\u73b0\u4e86&nbsp;Comparable \u63a5\u53e3\uff0c\u610f\u5473\u7740\u6700\u597d\u4e0d\u8981\u7528\u2018==\u2019\u6765\u6bd4\u8f83\u4e24\u4e2a\u5b57\u7b26\u4e32\u662f\u5426\u76f8\u7b49\uff0c\u800c\u5e94\u8be5\u7528&nbsp;<code>compareTo()<\/code>&nbsp;\u65b9\u6cd5\u53bb\u6bd4\u8f83\uff08\u8fd9\u91cc\u63d0\u4e00\u5634\u201c==\u201d\u4e0e\u201cequal\u201d\u7684\u4e0d\u540c\uff0c\u6bd4\u8f83\uff08\u8fd9\u91cc\u4e4b\u540e\u4f1a\u6dfb\u52a0\u8d85\u94fe\u63a5\uff09\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd8\u6709\u4e00\u70b9\u5f88\u91cd\u8981\u7684\u662fString\u7684\u5e95\u5c42\u6570\u636e\u7531char\u6570\u7ec4\u53d8\u6210\u4e86byte\u6570\u7ec4\uff0c\u56e0\u4e3a\u5728\u67d0\u4e9b\u7f16\u7801\u8981\u6c42\u4e4b\uff0c\u5982\u679c\u4f7f\u7528char\u6570\u7ec4\uff0c\u82f1\u6587\u5b57\u7b26\u4f1a\u5360\u7528\u4e24\u4e2a\u5b57\u8282\uff0c\u4e2d\u6587\u5b57\u7b26\u4f1a\u5360\u7528\u4e24\u4e2a\u5b57\u8282\u3002\u4f46\u5982\u679c\u53d8\u6210\u4e86byte\u6570\u7ec4\uff0c\u82f1\u6587\u5b57\u7b26\u5c31\u53ea\u4f1a\u5360\u7528\u4e00\u4e2a\u5b57\u7b26\uff0c\u4e2d\u6587\u5b57\u7b26\u4f9d\u65e7\u5360\u7528\u4e24\u4e2a\u5b57\u8282\uff0c\u8fd9\u4f1a\u663e\u8457\u51cf\u5c11\u6211\u4eec\u5b57\u7b26\u4e32\u5bf9\u5185\u5b58\u7684\u5360\u7528\u60c5\u51b5\uff0c\u4e5f\u51cf\u5c11\u4e86\u6211\u4eecGC\uff08\u8fd9\u91cc\u4e4b\u540e\u8981\u6dfb\u52a0\u4e00\u4e2aGC\u56de\u6536\u7684\u94fe\u63a5\uff09\u56de\u6536\u7684\u538b\u529b<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5b57\u7b26\u4e32\u7684\u6e90\u7801\u89e3\u8bfb&#8212;hashcode\u65b9\u6cd5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">hashcode\u65b9\u6cd5\u662f\u4ec0\u4e48\uff0c\u4e3a\u4ec0\u4e48\u8981\u4f7f\u7528hashcode\u65b9\u6cd5\uff1f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9996\u5148hash\u662f\u4e00\u79cd\u8ba1\u7b97\u65b9\u6cd5\uff0c\u6bcf\u4e2a\u5b57\u7b26\u4e32\u90fd\u4f1a\u6709\u4e00\u4e2a\u4ed6\u81ea\u5df1\u7684hash\u503c\uff0c\u5e76\u4e14\u5927\u6982\u7387\u4e0d\u4f1a\u91cd\u590d\uff0c\u8fd9\u662f\u4e3a\u4e86\u65b9\u4fbf\u6211\u4eec\u53bb\u4f7f\u7528\u54c8\u5e0c\u8868\uff08\u8fd9\u91cc\u4e4b\u540e\u653e\u4e00\u4e2a\u8fde\u63a5\uff09\uff0c\u4e86\u89e3\u5b8c\u54c8\u5e0c\u8868\u4e4b\u540e\u5c31\u77e5\u9053\u4e3a\u4ec0\u4e48\u4e86<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u6765\u770b\u6e90\u7801\uff0c\u6e90\u7801\u6709\u4e00\u4e2a\u5f88\u91cd\u8981\u7684\u8ba1\u7b97\uff0c\u6211\u4eec\u79f0\u4e4b\u4e3a31\u500d\u54c8\u5e0c\u7b97\u6cd5\uff0c\u5176\u5b9e\u5185\u5bb9\u5f88\u7b80\u5355\uff0c\u904d\u5386\u5b57\u7b26\u4e32\uff0c\u5bf9\u4e8e\u5b57\u7b26\u4e32\u7684\u6bcf\u4e00\u4f4d\uff0c<strong>\u4ece\u5de6\u5230\u53f3<\/strong>\u53d6\u5176ASCII\u7801\u5e76\u4e14*\u5176\u5bf9\u5e94\u7684\u9636\u7ea7\uff0c\u6700\u540e\u6c42\u548c\uff0c\u6211\u4eec\u53ef\u4ee5\u624b\u6413\u4e00\u4e2a\u7b80\u5355\u7684\u4ee3\u7801\u6765\u6a21\u62df\u8fd9\u4e2a\u8fc7\u7a0b<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>String s = abcdefghikj;\nint h = 0;\nfor(int i=0;i&lt;s.length;i++){\n    h = 31*+s.char(i)\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8bf7\u6ce8\u610f\u8fd9\u91cc\u662f\u600e\u4e48\u8fdb\u884c\u5e42\u8fd0\u7b97\u7684\uff0c\u6211\u7b2c\u4e00\u6b21\u770b\u7684\u65f6\u5019\u89c9\u5f97\u5341\u5206\u7684\u5de7\u5999\uff0c\u76f4\u63a5\u8fdb\u884c\u5e42\u8fd0\u7b97\u4f1a\u51cf\u6162JVM\u7684\u901f\u5ea6<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/lsuccess.xyz\/wp-content\/uploads\/2025\/06\/image-1.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"690\" height=\"369\" data-original=\"http:\/\/lsuccess.xyz\/wp-content\/uploads\/2025\/06\/image-1.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-56\" style=\"width:747px;height:auto\"  sizes=\"auto, (max-width: 690px) 100vw, 690px\" \/><\/div><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\">\u5b57\u7b26\u4e32\u7684\u6e90\u7801\u89e3\u8bfb&#8212;substring\u65b9\u6cd5<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>public String substring(int beginIndex) {\n    \/\/ \u68c0\u67e5\u8d77\u59cb\u7d22\u5f15\u662f\u5426\u5c0f\u4e8e 0\uff0c\u5982\u679c\u662f\uff0c\u5219\u629b\u51fa StringIndexOutOfBoundsException \u5f02\u5e38\n    if (beginIndex &lt; 0) {\n        throw new StringIndexOutOfBoundsException(beginIndex);\n    }\n    \/\/ \u8ba1\u7b97\u5b50\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\n    int subLen = value.length - beginIndex;\n    \/\/ \u68c0\u67e5\u5b50\u5b57\u7b26\u4e32\u957f\u5ea6\u662f\u5426\u4e3a\u8d1f\u6570\uff0c\u5982\u679c\u662f\uff0c\u5219\u629b\u51fa StringIndexOutOfBoundsException \u5f02\u5e38\n    if (subLen &lt; 0) {\n        throw new StringIndexOutOfBoundsException(subLen);\n    }\n    \/\/ \u5982\u679c\u8d77\u59cb\u7d22\u5f15\u4e3a 0\uff0c\u5219\u8fd4\u56de\u539f\u5b57\u7b26\u4e32\uff1b\u5426\u5219\uff0c\u521b\u5efa\u5e76\u8fd4\u56de\u65b0\u7684\u5b57\u7b26\u4e32\n    return (beginIndex == 0) ? this : new String(value, beginIndex, subLen);\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">substring \u65b9\u6cd5\u9996\u5148\u68c0\u67e5\u53c2\u6570\u7684\u6709\u6548\u6027\uff0c\u5982\u679c\u53c2\u6570\u65e0\u6548\uff0c\u5219\u629b\u51fa StringIndexOutOfBoundsException&nbsp;\u5f02\u5e38\uff08\u8fd9\u91cc\u4e4b\u540e\u4f1a\u653e\u7f6e\u4e00\u4e2a\u8fde\u63a5\uff09\u3002\u63a5\u4e0b\u6765\uff0c\u65b9\u6cd5\u6839\u636e\u53c2\u6570\u8ba1\u7b97\u5b50\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u3002\u5982\u679c\u5b50\u5b57\u7b26\u4e32\u957f\u5ea6\u5c0f\u4e8e\u96f6\uff0c\u4e5f\u4f1a\u629b\u51fa StringIndexOutOfBoundsException \u5f02\u5e38\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c beginIndex \u4e3a 0\uff0c\u8bf4\u660e\u5b50\u4e32\u4e0e\u539f\u5b57\u7b26\u4e32\u76f8\u540c\uff0c\u76f4\u63a5\u8fd4\u56de\u539f\u5b57\u7b26\u4e32\u3002\u5426\u5219\uff0c\u4f7f\u7528 value \u6570\u7ec4\uff08\u539f\u5b57\u7b26\u4e32\u7684\u5b57\u7b26\u6570\u7ec4\uff09\u7684\u4e00\u90e8\u5206 <strong>new \u4e00\u4e2a\u65b0\u7684 String \u5bf9\u8c61<\/strong>\uff08\u5b57\u7b26\u4e32\u662f\u4e0d\u53ef\u53d8\u7684\u8fd9\u4e2a\u601d\u60f3\u7684\u4f53\u73b0\uff09\u5e76\u8fd4\u56de\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u66f4\u591a\u7684\u5b57\u7b26\u4e32\u4f7f\u7528\u65b9\u6cd5\u548c\u5176\u5de5\u5177\u7c7b\u7684\u4f7f\u7528\u6211\u4f1a\u5728\u522b\u7684\u6587\u7ae0\u4e2d\u7ed9\u51fa\uff08\u8fd9\u91cc\u4e4b\u540e\u8981\u7ed9\u4e0a\u8fde\u63a5\uff09<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5b57\u7b26\u4e32\u5e38\u91cf\u6c60<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u9996\u5148\u6211\u5728\u8fd9\u91cc\u7ed9\u51fa\u4e00\u4e2a\u62d9\u89c1\uff0c1.<em>\u5bf9\u4e8e\u5728\u7f16\u8bd1\u65f6\u5c06\u80fd\u77e5\u9053\u7684\u91cf\uff0c\u90a3\u4e48\u8fd9\u4e2a\u91cf\u5c31\u4f1a\u88ab\u653e\u8fdb\u5e38\u91cf\u6c60\u4e2d<\/em>\u30022.<em>\u4f7f\u7528new\u65b9\u6cd5\u5c31\u4e00\u5b9a\u4f1a\u521b\u5efa\u51fa\u65b0\u7684\u5bf9\u8c61<\/em>\uff08\u5f53\u7136\u4ee5\u4e0a\u4e24\u79cd\u8bf4\u6cd5\u8fd8\u6709\u5f85\u66f4\u591a\u7684\u8003\u8bc1\uff0c\u76ee\u524d\u6765\u8bf4\u8fd8\u6ca1\u51fa\u8fc7\u95ee\u9898\uff09\u5b57\u7b26\u4e32\u4e5f\u4e0d\u4f8b\u5916\u3002\u6211\u4eec\u6765\u770b\u4e0b\u9762\u8fd9\u4e2a\u4f8b\u5b50\uff08\u540c\u65f6\u6211\u4e5f\u4f1a\u8be6\u7ec6\u8bf4\u8bf4intern\u8fd9\u4e2a\u65b9\u6cd5\uff09<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>String a = new String(\"abc\");\nString b = abc;\n\u8fd9\u4e2a\u5730\u65b9\u4e00\u5171\u521b\u9020\u4e86\u51e0\u4e2a\u5bf9\u8c61\u5462,(\u53ef\u80fd\u4f1a\u548c\u53d8\u91cf\u641e\u6df7\uff0c\u8fd9\u91cc\u518d\u63d0\u4e00\u4e2a\u95ee\u9898\u4e00\u5171\u521b\u5efa\u4e86\u51e0\u4e2a\u53d8\u91cf)<\/code><\/pre>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>\u7b54\u6848<\/summary>\n<p class=\"wp-block-paragraph\">\u4e00\u5171\u6709\u4e24\u4e2a\u5bf9\u8c61\uff0c\u4e24\u4e2a\u53d8\u91cf\u5f15\u7528\uff0c\u8bf7\u4e0d\u8981\u641e\u6df7\u4e71\uff0c\u6bd5\u7adf\u5b66\u5f97\u8d8a\u591a\u6211\u4eec\u5c31\u5f04\u5bb9\u6613\u628a\u77e5\u8bc6\u5f04\u6df7<\/p>\n<\/details>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8e\u201d \u201c\u76f4\u63a5\u5f15\u7528\u7684\u5bf9\u8c61\uff0cJVM\u5728\u7f16\u8bd1\u65f6\u4f1a\u81ea\u52a8\u628a\u8fd9\u90e8\u5206\u653e\u8fdb\u5e38\u91cf\u6c60\uff08\u5982\u679c\u5e38\u91cf\u6c60\u4e2d\u4e4b\u524d\u6ca1\u6709\uff09\u4e2d\uff0c\u8fd9\u5c31\u662f\u7f16\u8bd1\u65f6\u5c31\u80fd\u77e5\u9053\u7684\u91cf\u3002\u8fd9\u91cc\u662f\u4e00\u4e2a\u5bf9\u8c61\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u4e8c\u4e2a\u5bf9\u8c61\u5219\u662f\u8bf4\u6cd5\u4e8c\u4e2d\u7684new\uff0cnew\u4e00\u5b9a\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5bf9\u8c61\uff0c\u800c\u5bf9\u4e8eb\u6765\u8bf4\uff0c\u4ed6\u4f1a\u76f4\u63a5\u5f15\u7528\u5b57\u7b26\u4e32\u5e38\u91cf\u6c60\u4e2d\u7684abc\u7684\u5730\u5740\uff0c\u5927\u4f53\u5982\u4e0b\uff08\u56fe\u4e2d\u6211\u4e3a\u4e86\u65b9\u4fbf\u4f7f\u7528\u7684\u662fJava7\u65f6\u671f\u7684\u6c38\u4e45\u4ee3\u5f62\u5f0f\uff0c\u540e\u9762\u4f1a\u63d0\u53ca\u8fd9\u4e2a\u662f\u4ec0\u4e48\uff09\uff0c\u53d8\u91cf\u58f0\u660e\u5728\u6808\u4e0a\uff0c\u5bf9\u8c61\u58f0\u660e\u5728\u5806\u4e2d\uff08\u8fd9\u4e2a\u5730\u65b9\u5b58\u7591\uff0c\u6211\u8bb0\u5f97\u6709\u76f4\u63a5\u58f0\u660e\u5728\u6808\u4e0a\u7684\u53d8\u91cf\uff09<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/lsuccess.xyz\/wp-content\/uploads\/2025\/06\/image-2-1024x533.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"533\" data-original=\"http:\/\/lsuccess.xyz\/wp-content\/uploads\/2025\/06\/image-2-1024x533.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-65\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">\u90a3\u4e48\u8fd9\u6837\u4f1a\u6709\u4ec0\u4e48\u597d\u5904\u5462\uff0c\u5f88\u660e\u663e\u7684\u4e00\u70b9\u5c31\u662f\u9ad8\u6548\uff0c\u6211\u4eec\u521b\u5efa\u5b57\u7b26\u4e32\u7ed9\u7684\u65f6\u5019\u662f\u4e0d\u662f\u76f4\u63a5<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">String a =  \u201dhello\u201c\uff0c\u800c\u4e14\u4e0d\u662f String a = new String\uff08\u201dhello\u201c\uff09\uff0cJVM\u5df2\u7ecf\u5e2e\u6211\u4eec\u7701\u53bb\u4e86new\u8fd9\u4e00\u6b65\u7684\u64cd\u4f5c\uff0c\u81ea\u7136\u5c31\u5feb\u5f88\u591a\u5566<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u90a3\u4e48\u6211\u4eec\u518d\u6765\u770b\u770b\u4e0b\u9762\u8fd9\u4e2a\u4f8b\u5b50<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>String a = new String(\"hello\")\nString b = intern(\"hello\")\nStirng c = a.intern\n<\/code><\/pre>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>\u7b54\u6848<\/summary>\n<p class=\"wp-block-paragraph\">\u4f9d\u65e7\u4e24\u4e2a\u5bf9\u8c61\uff0cintern\u4f1a\u8fd4\u56de\u5e38\u91cf\u6c60\u4e2d\u7684\u5730\u5740\uff0c\u5982\u679c\u8fd9\u4e2aintern\u9700\u8981\u7684\u503c\u88ab\u58f0\u660e\u5728\u4e86\u5806\u4e0a\uff0c\u90a3\u4e48\u5c31\u4f1a\u5f15\u7528\u5806\u4e0a\u7684\u3002intern\u4f1a\u628a\u8fd9\u4e2a\u5b57\u7b26\u4e32\u5185\u5bb9\u653e\u5230\u5e38\u91cf\u6c60\u4e2d\u3002<\/p>\n<\/details>\n\n\n\n<h3 class=\"wp-block-heading\">\u5b57\u7b26\u4e32\u5e38\u91cf\u6c60&#8212;\u6c38\u4e45\u4ee3\u548c\u5143\u7a7a\u95f4<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u9762\u6211\u63d0\u5230\u6211\u662f\u4f7f\u7528\u6c38\u4e45\u4ee3\u7684\u65b9\u6cd5\u6765\u8868\u73b0\u5b57\u7b26\u4e32\u5e38\u91cf\u6c60\u7684\u4f4d\u7f6e\uff0c\u5176\u5b9e\u5b83\u7684\u4f4d\u7f6e\u662f\u6709\u4e00\u4e2a\u5386\u7a0b\u7684\uff0c\u73b0\u5728\u4f7f\u7528\u7684\u662f\u5143\u7a7a\u95f4\u7684\u5f62\u5f0f\uff0c\u6211\u4eec\u6765\u4e00\u4e2a\u4e2a\u770b\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u6c38\u4e45\u4ee3\u65f6\u671f<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u51fa\u73b0\u5728JAVA7\u4e4b\u540e\u7684\u4e00\u6bb5\u65f6\u95f4\u4e2d\uff0c\u6c38\u4e45\u4ee3\u662f\u4e00\u6bb5<strong>\u5806\u4e2d\u7684\u5927\u5c0f\u6052\u5b9a\u7684\u5185\u5b58\u7a7a\u95f4<\/strong>\uff08\u4e5f\u5c31\u662f\u8bf4\u4e0d\u4ec5\u4ec5\u88c5\u7684\u662f\u5b57\u7b26\u4e32\u5e38\u91cf\u6c60\uff09\uff0cJava7\u4e4b\u524d\u5b57\u7b26\u5e38\u91cf\u6c60\u5c31\u653e\u5728\u6c38\u4e45\u4ee3\u4e2d\uff0c\u4f46\u4e0d\u4ec5\u6c38\u4e45\u4ee3\u53d7\u5230\u5806\u5185\u5b58\u7684\u5f71\u54cd\uff0c\u5b57\u7b26\u4e32\u5e38\u91cf\u6c60\u4e5f\u53d7\u5230\u6c38\u4e45\u4ee3\u7684\u5f71\u54cd\uff0c\u6240\u4ee5\u4e4b\u540e\u6211\u4eec\u5c06\u5176\u79fb\u52a8\u5230\u5806\u4e2d\uff0c<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/lsuccess.xyz\/wp-content\/uploads\/2025\/06\/image-6.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"731\" height=\"426\" data-original=\"http:\/\/lsuccess.xyz\/wp-content\/uploads\/2025\/06\/image-6.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-71\" style=\"width:526px;height:auto\"  sizes=\"auto, (max-width: 731px) 100vw, 731px\" \/><\/div><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">\u4f46\u8fd8\u662f\u4f1a\u53d7\u5230\u5806\u5185\u5b58\u7684\u5f71\u54cd\uff0c\u5982\u679c\u6211\u4eec\u521b\u5efa\u4e86\u8bb8\u591a\u7684\u5bf9\u8c61\uff0c\u5c31\u4f1a\u51fa\u73b0OOM\u9519\u8bef<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/lsuccess.xyz\/wp-content\/uploads\/2025\/06\/image-5.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"723\" height=\"421\" data-original=\"http:\/\/lsuccess.xyz\/wp-content\/uploads\/2025\/06\/image-5.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-70\" style=\"width:556px;height:auto\"  sizes=\"auto, (max-width: 723px) 100vw, 723px\" \/><\/div><\/figure>\n<\/div>\n\n\n<p class=\"wp-block-paragraph\">\u6240\u4ee5\u6211\u4eec\u4f7f\u7528\u5143\u7a7a\u95f4\u6765\u5b58\u653e\u5b57\u7b26\u4e32\u5e38\u91cf\u6c60\uff0c\u5b83\u76f4\u63a5\u90e8\u7f72\u5728\u4e3b\u673a\u7684\u5185\u5b58\u4e0a\uff0c\u8fd9\u6837\u5c31\u76f4\u63a5\u53d6\u51b3\u4e8e\u4e3b\u673a\u5185\u5b58\u7684\u5927\u5c0f\uff0c\u8fd9\u6837\u5c31\u4e0d\u4f1a\u5bfc\u81f4OOM\uff0c\u5e76\u4e14\u56de\u6536\u673a\u5236\u7684\u58f0\u660e\u5468\u671f\u4e5f\u662f\u5206\u5f00\u8ba1\u7b97\u7684<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/lsuccess.xyz\/wp-content\/uploads\/2025\/06\/image-7.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"362\" height=\"423\" data-original=\"http:\/\/lsuccess.xyz\/wp-content\/uploads\/2025\/06\/image-7.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-72\" style=\"width:280px;height:auto\"  sizes=\"auto, (max-width: 362px) 100vw, 362px\" \/><\/div><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">String.Bulider\u548cString.Buffer<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3a\u4ec0\u4e48\u8981\u6709\u8fd9\u4e24\u4e2a\u4e1c\u897f\u5462\uff0c\u539f\u56e0\u5f88\u7b80\u5355\uff0cString\u662f\u4e0d\u53ef\u53d8\u7684\uff0c\u6bcf\u6b21\u6211\u4eec\u5bf9\u5b57\u7b26\u4e32\u5bf9\u8c61\u8fdb\u884c\u64cd\u4f5c\u7684\u65f6\u5019\u5b9e\u9645\u4e0a\u90fd\u662f\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u5b57\u7b26\u4e32\u5bf9\u8c61\uff0c\u7279\u522b\u662f\u6211\u4eec\u4f7f\u7528+\u62fc\u63a5\u5b57\u7b26\u4e32\u5bf9\u8c61\u7684\u65f6\u5019\uff0c\u9891\u7e41\u7684\u4f7f\u7528+\u4f1a\u5bfc\u81f4\u4e0d\u5fc5\u8981\u7684\u5bf9\u8c61\u4ea7\u751f\uff0c\u9020\u6210\u5185\u5b58\u7684\u6d88\u8017\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u90a3\u4e48\u4e24\u4e2a\u6709\u4ec0\u4e48\u533a\u522b\uff0c\u5f88\u7b80\u5355\uff0cBulider\u662f\u7ebf\u7a0b\u5b89\u5168\u7684\uff0c\u56e0\u4e3a\u6dfb\u52a0\u4e86Synchronized\uff08\u8fd9\u91cc\u4e4b\u540e\u6dfb\u52a0\u4e00\u4e2a\u8fde\u63a5\u8df3\u8f6c\u8fc7\u53bb\uff09\uff0c\u4f46\u4e5f\u662f\u56e0\u4e3a\u5982\u6b64\uff0c\u5728\u5355\u7ebf\u7a0b\u7684\u4f7f\u7528\u73af\u5883\u4e0b\u6267\u884c\u6548\u7387\u5f88\u4f4e\u3002Buffer\u6ca1\u6709\u8fd9\u6837\u7684\u5173\u952e\u5b57\uff0c\u5728\u5355\u7ebf\u7a0b\u73af\u5883\u4e0b\u6267\u884c\u6548\u7387\u9ad8\uff0c\u5982\u679c\u9047\u5230\u591a\u7ebf\u7a0b\u73af\u5883\u5c31\u4f7f\u7528Thredlocal\uff08\u8fd9\u91cc\u6dfb\u52a0\u4e00\u4e2a\u8df3\u8f6c\u8fde\u63a5\uff09\u5c31\u884c<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Bulider\u5185\u90e8\u65b9\u6cd5\u7c7b\u6e90\u7801\u89e3\u8bfb&#8212;toStirng<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">toString\u8001\u751f\u5e38\u8c08\uff0c\u7528\u4e8e\u8f6c\u6362\u5b57\u7b26\u4e32\u4f7f\u7528\u7684\uff0c\u6211\u4eec\u6765\u770b\u770b\u8fd9\u90e8\u5206\u7684\u6e90\u7801\uff0c\u4e5f\u662f\u5f88\u597d\u89e3\u8bfb<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public String toString() {\n    return new String(value, 0, count);\n}\n\u5927\u4f53\u610f\u601d\u662f\u6709\u4e00\u4e2avalue\u7684\u5b57\u7b26\u6570\u7ec4\uff0c\u5927\u5c0f\u9ed8\u8ba4\u4e3a16\uff08\u4f1a\u81ea\u52a8\u6269\u5bb9\uff09,\u5c06\u8981\u8f6c\u6362\u7684\u5b57\u7b26\u4e32\u4ece0\u5230count\u8f6c\u5165value\u5b57\u7b26\u6570\u7ec4\u4e2d\uff0c\u5e76\u4e14\u4e5f\u80fd\u770b\u51fa\u6211\u524d\u9762\u63d0\u5230\u7684\u601d\u60f3\uff0c\u5bf9\u5b57\u7b26\u4e32\u7684\u64cd\u4f5c\u662f\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u5bf9\u8c61\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">Bulider\u5185\u90e8\u65b9\u6cd5\u7c7b\u6e90\u7801\u89e3\u8bfb&#8212;append<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f9d\u65e7\u5148\u770b\u6e90\u7801<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public StringBuilder append(String str) {\n    super.append(str);\n    return this;\n}\npublic AbstractStringBuilder append(String str) {\n    if (str == null)\n        return appendNull();\n    int len = str.length();\n    ensureCapacityInternal(count + len);\n    str.getChars(0, len, value, count);\n    count += len;\n    return this;\n}\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9e\u9645\u4e0a\u6211\u4eecappend\u8c03\u7528\u4e86\u7236\u7c7bAbstractString\u7684\u65b9\u6cd5\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u4f1a\u5148\u5224\u65ad\u8981\u5b57\u7b26\u5e8f\u5217\u7684\u7a7a\u95f4\u662f\u5426\u591f\u7528\uff0c\u4e0d\u591f\u7528\u5c06\u4f1a\u8fdb\u884c\u6269\u5bb9\uff0c\u6269\u5bb9\u5b8c\u6bd5\u4e4b\u540e\u52a0\u5165\u8981\u6dfb\u52a0\u7684\u5b57\u7b26\uff0c\u8fd9\u4e2a\u6269\u5bb9\u65b9\u6cd5\u662f<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>private void ensureCapacityInternal(int minimumCapacity) {\n    \/\/ \u4e0d\u591f\u7528\u4e86\uff0c\u6269\u5bb9\n    if (minimumCapacity - value.length > 0)\n        expandCapacity(minimumCapacity);\n}\n\nvoid expandCapacity(int minimumCapacity) {\n    \/\/ \u6269\u5bb9\u7b56\u7565\uff1a\u65b0\u5bb9\u91cf\u4e3a\u65e7\u5bb9\u91cf\u7684\u4e24\u500d\u52a0\u4e0a 2\n    int newCapacity = value.length * 2 + 2;\n    \/\/ \u5982\u679c\u65b0\u5bb9\u91cf\u5c0f\u4e8e\u6307\u5b9a\u7684\u6700\u5c0f\u5bb9\u91cf\uff0c\u5219\u65b0\u5bb9\u91cf\u4e3a\u6307\u5b9a\u7684\u6700\u5c0f\u5bb9\u91cf\n    if (newCapacity - minimumCapacity &lt; 0)\n        newCapacity = minimumCapacity;\n    \/\/ \u5982\u679c\u65b0\u5bb9\u91cf\u5c0f\u4e8e 0\uff0c\u5219\u65b0\u5bb9\u91cf\u4e3a Integer.MAX_VALUE\n    if (newCapacity &lt; 0) {\n        if (minimumCapacity &lt; 0) \/\/ overflow\n            throw new OutOfMemoryError();\n        newCapacity = Integer.MAX_VALUE;\n    }\n    \/\/ \u5c06\u5b57\u7b26\u5e8f\u5217\u7684\u5bb9\u91cf\u6269\u5bb9\u5230\u65b0\u5bb9\u91cf\u7684\u5927\u5c0f\n    value = Arrays.copyOf(value, newCapacity);\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><code>ensureCapacityInternal(int minimumCapacity)<\/code>&nbsp;\u65b9\u6cd5\u7528\u4e8e\u786e\u4fdd\u5f53\u524d\u5b57\u7b26\u5e8f\u5217\u7684\u5bb9\u91cf\u81f3\u5c11\u7b49\u4e8e\u6307\u5b9a\u7684\u6700\u5c0f\u5bb9\u91cf minimumCapacity\u3002\u5982\u679c\u5f53\u524d\u5bb9\u91cf\u5c0f\u4e8e\u6307\u5b9a\u7684\u5bb9\u91cf\uff0c\u5c31\u4f1a\u4e3a\u5b57\u7b26\u5e8f\u5217\u5206\u914d\u4e00\u4e2a\u65b0\u7684\u5185\u90e8\u6570\u7ec4\u3002\u65b0\u5bb9\u91cf\u7684\u8ba1\u7b97\u65b9\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5982\u679c\u6307\u5b9a\u7684\u6700\u5c0f\u5bb9\u91cf\u5927\u4e8e\u5f53\u524d\u5bb9\u91cf\uff0c\u5219\u65b0\u5bb9\u91cf\u4e3a\u4e24\u500d\u7684\u65e7\u5bb9\u91cf\u52a0\u4e0a 2\u3002\u4e3a\u4ec0\u4e48\u8981\u52a0 2 \u5462\uff1f\u5bf9\u4e8e\u975e\u5e38\u5c0f\u7684\u5b57\u7b26\u4e32\uff08\u6bd4\u5982\u7a7a\u7684\u6216\u53ea\u6709\u4e00\u4e2a\u5b57\u7b26\u7684 StringBuilder\uff09\uff0c\u4ec5\u4ec5\u5c06\u5bb9\u91cf\u52a0\u500d\u53ef\u80fd\u4ecd\u7136\u4e0d\u8db3\u4ee5\u5bb9\u7eb3\u66f4\u591a\u7684\u5b57\u7b26\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c+ 2 \u63d0\u4f9b\u4e86\u4e00\u4e2a\u6700\u5c0f\u7684\u589e\u957f\u91cf\uff0c\u786e\u4fdd\u5373\u4f7f\u5bf9\u4e8e\u5f88\u5c0f\u7684\u521d\u59cb\u5bb9\u91cf\uff0c\u6269\u5bb9\u540e\u4e5f\u80fd\u81f3\u5c11\u6dfb\u52a0\u4e00\u4e9b\u5b57\u7b26\u800c\u4e0d\u9700\u8981\u7acb\u5373\u518d\u6b21\u6269\u5bb9\u3002<\/li>\n\n\n\n<li>\u5982\u679c\u6307\u5b9a\u7684\u6700\u5c0f\u5bb9\u91cf\u5c0f\u4e8e\u7b49\u4e8e\u5f53\u524d\u5bb9\u91cf\uff0c\u5219\u4e0d\u4f1a\u8fdb\u884c\u6269\u5bb9\uff0c\u76f4\u63a5\u8fd4\u56de\u5f53\u524d\u5bf9\u8c61\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u8fdb\u884c\u6269\u5bb9\u4e4b\u524d\uff0c<code>ensureCapacityInternal(int minimumCapacity)<\/code>\u00a0\u65b9\u6cd5\u4f1a\u5148\u68c0\u67e5\u5f53\u524d\u5b57\u7b26\u5e8f\u5217\u7684\u5bb9\u91cf\u662f\u5426\u8db3\u591f\uff0c\u5982\u679c\u4e0d\u8db3\u5c31\u4f1a\u8c03\u7528\u00a0<code>expandCapacity(int minimumCapacity)<\/code>\u00a0\u65b9\u6cd5\u8fdb\u884c\u6269\u5bb9\u3002<code>expandCapacity(int minimumCapacity)<\/code>\u00a0\u65b9\u6cd5\u9996\u5148\u8ba1\u7b97\u51fa\u65b0\u5bb9\u91cf\uff0c\u7136\u540e\u4f7f\u7528\u00a0<code>Arrays.copyOf(char[] original, int newLength)<\/code>\u00a0\u65b9\u6cd5\uff08\u8fd9\u91cc\u4e4b\u540e\u52a0\u4e00\u4e2a\u8fde\u63a5\uff09\u5c06\u539f\u5b57\u7b26\u6570\u7ec4\u6269\u5bb9\u5230\u65b0\u5bb9\u91cf\u7684\u5927\u5c0f\u3002\u8fd9\u91cc\u4e5f\u80fd\u770b\u51fa\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u662f\u6709\u4e00\u4e2a\u590d\u5236\u7684\u8fc7\u7a0b<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Bulider\u5185\u90e8\u65b9\u6cd5\u7c7b\u6e90\u7801\u89e3\u8bfb&#8212;reverse<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>public AbstractStringBuilder reverse() {\n    int n = count - 1; \/\/ \u5b57\u7b26\u5e8f\u5217\u7684\u6700\u540e\u4e00\u4e2a\u5b57\u7b26\u7684\u7d22\u5f15\n    \/\/ \u904d\u5386\u5b57\u7b26\u4e32\u7684\u524d\u534a\u90e8\u5206\n    for (int j = (n-1) >> 1; j >= 0; j--) {\n        int k = n - j; \/\/ \u8ba1\u7b97\u76f8\u5bf9\u4e8e j \u5bf9\u79f0\u7684\u5b57\u7b26\u7684\u7d22\u5f15\n        char cj = value&#91;j]; \/\/ \u83b7\u53d6\u5f53\u524d\u4f4d\u7f6e\u7684\u5b57\u7b26\n        char ck = value&#91;k]; \/\/ \u83b7\u53d6\u5bf9\u79f0\u4f4d\u7f6e\u7684\u5b57\u7b26\n        value&#91;j] = ck; \/\/ \u4ea4\u6362\u5b57\u7b26\n        value&#91;k] = cj; \/\/ \u4ea4\u6362\u5b57\u7b26\n    }\n    return this; \/\/ \u8fd4\u56de\u53cd\u8f6c\u540e\u7684\u5b57\u7b26\u4e32\u6784\u5efa\u5668\u5bf9\u8c61\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u89c2\u5bdf\u6e90\u7801\u5c31\u80fd\u53d1\u73b0\u6e90\u7801\u5de7\u5999\u7684\u5730\u65b9\uff0c\u5176\u5b9e\u53ea\u904d\u5386\u4e86\u6574\u4e2a\u5b57\u7b26\u4e32\u7684\u524d\u534a\u90e8\u5206\uff0c\u7136\u540e\u6bcf\u4e00\u4e2a\u524d\u534a\u90e8\u5206\u8ba1\u7b97\u51fa\u5176\u5bf9\u5e94\u7684\u8c03\u6362\u4f4d\u7f6e\uff0c\u7528\u4e24\u4e2a\u4e34\u65f6\u904d\u5386\u6765\u5b58\u653e\u8981\u4ea4\u6362\u7684\u503c\u5c31\u53ef\u4ee5\u4e86\uff08\u6211\u611f\u89c9\u7528\u4e00\u4e2a\u53d8\u91cf\u5c31\u8db3\u591f\u4e86\uff09\uff0c\u5176\u5b9e\u53cd\u8f6c\u8fd9\u4e2a\u5730\u65b9\u5927\u6709\u5b66\u95ee\uff0c\u5728\u7b97\u6cd5\u4e2d\u4f1a\u7ecf\u5e38\u63d0\u53ca\uff08\u8fd9\u91cc\u4f1a\u6709\u4e00\u4e2a\u7b97\u6cd5\u7684\u94fe\u63a5\uff09<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5b57\u7b26\u4e32\u5e38\u7528\u65b9\u6cd5<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5355\u7eaf\u662fString\u7c7b\u7684\u539f\u751f\u65b9\u6cd5\u6709<br>int length()<br>char charAt(int index)<br>int indexOf(String str)<br>int lastIndexOf(String str)<br>boolean contains(CharSequence s)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">String substring(int beginIndex)<br>String substring(int beginIndex, int endIndex)<br>String concat(String str)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">char[] toCharArray()<br>byte[] getBytes()<br>String toLowerCase()<br>String toUpperCase()<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">String replace(char oldChar, char newChar)<br>String replace(CharSequence target, CharSequence replacement)<br>String replaceAll(String regex, String replacement)<br>String replaceFirst(String regex, String replacement)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">String replace(char oldChar, char newChar)<br>String replace(CharSequence target, CharSequence replacement)<br>String replaceAll(String regex, String replacement)<br>String replaceFirst(String regex, String replacement)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">boolean equals(Object obj)<br>boolean equalsIgnoreCase(String anotherString)<br>boolean isEmpty()<br>boolean startsWith(String prefix)<br>boolean endsWith(String suffix)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">String trim()<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">int compareTo(String anotherString)<br>int compareToIgnoreCase(String str)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">String[] split(String regex)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">boolean matches(String regex)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6765\u81eaStringUtils\u5de5\u5177\u7c7b\u7684\u6709<br>StringUtils.isBlank(String str)<br>StringUtils.isEmpty(String str)<br>StringUtils.join(List list, &#8220;, &#8220;)<br>StringUtils.split(String str, &#8220;,&#8221;)<br>StringUtils.strip(String str)<br>StringUtils.capitalize(String str)<br>StringUtils.equalsIgnoreCase(String a, String b)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0d\u9700\u8981\u6b7b\u8bb0\uff0c\u591a\u5b9e\u8df5\u4f7f\u7528\u5c31\u4f1a\u719f\u6089\u4e86<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7ec8\u4e8e\u80fd\u7528\u535a\u5ba2\u6765\u5199\u81ea\u5df1\u7684\u77e5\u8bc6\u70b9\u4e86\uff0c\u73b0\u5728\u628a\u4e4b\u524d\u5b66\u5230\u7684\u77e5\u8bc6\u70b9\u5168\u90e8\u8865\u4e0a\u53bb \u5b57\u7b26\u4e32\u6e90\u7801\u89e3\u8bfb \u901a\u8fc7\u6e90\u7801\u6765\u5b66\u4e60\u5185\u5bb9\u662f\u6700\u76f4\u63a5\u4e86 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":31,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,1],"tags":[],"class_list":["post-49","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-java","category-learn"],"_links":{"self":[{"href":"https:\/\/lsuccess.xyz\/index.php\/wp-json\/wp\/v2\/posts\/49","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lsuccess.xyz\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lsuccess.xyz\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lsuccess.xyz\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lsuccess.xyz\/index.php\/wp-json\/wp\/v2\/comments?post=49"}],"version-history":[{"count":14,"href":"https:\/\/lsuccess.xyz\/index.php\/wp-json\/wp\/v2\/posts\/49\/revisions"}],"predecessor-version":[{"id":85,"href":"https:\/\/lsuccess.xyz\/index.php\/wp-json\/wp\/v2\/posts\/49\/revisions\/85"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lsuccess.xyz\/index.php\/wp-json\/wp\/v2\/media\/31"}],"wp:attachment":[{"href":"https:\/\/lsuccess.xyz\/index.php\/wp-json\/wp\/v2\/media?parent=49"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lsuccess.xyz\/index.php\/wp-json\/wp\/v2\/categories?post=49"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lsuccess.xyz\/index.php\/wp-json\/wp\/v2\/tags?post=49"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}