{"id":18,"date":"2022-12-29T17:54:52","date_gmt":"2022-12-18T10:14:58","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/%e5%a6%82%e4%bd%95%e5%9c%a8java%e4%b8%ad%e4%bd%bf%e7%94%a8%e6%95%b0%e7%bb%84\/"},"modified":"2025-07-31T20:54:05","modified_gmt":"2025-07-31T12:54:05","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8java%e4%b8%ad%e4%bd%bf%e7%94%a8%e6%95%b0%e7%bb%84","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%a6%82%e4%bd%95%e5%9c%a8java%e4%b8%ad%e4%bd%bf%e7%94%a8%e6%95%b0%e7%bb%84\/","title":{"rendered":"Java\u6570\u7ec4\u6559\u7a0b\uff1a\u638c\u63e1\u58f0\u660e\u3001\u521d\u59cb\u5316\u4e0e\u64cd\u4f5c\u6280\u5de7"},"content":{"rendered":"<h3>\u7b80\u4ecb<\/h3>\n<p>\u6570\u7ec4\u5141\u8bb8\u60a8\u5c06\u591a\u4e2a\u5143\u7d20\u5206\u7ec4\u548c\u5b58\u50a8\u3002\u4f7f\u7528\u6570\u7ec4\uff0c\u60a8\u53ef\u4ee5\u5b58\u50a8\u4efb\u4f55\u7c7b\u578b\u7684\u6570\u636e\uff0c\u5305\u62ec\u5f15\u7528\u7c7b\u578b\u6216\u539f\u59cb\u7c7b\u578b\u3002\u7136\u800c\uff0c\u6240\u6709\u7684\u6570\u7ec4\u5143\u7d20\u5fc5\u987b\u662f\u76f8\u540c\u7684\u6570\u636e\u7c7b\u578b\u3002\u6570\u7ec4\u7684\u6570\u636e\u7c7b\u578b\u5728\u521b\u5efa\u6570\u7ec4\u65f6\u58f0\u660e\uff0c\u4e0d\u80fd\u66f4\u6539\u3002\u7c7b\u4f3c\u5730\uff0c\u6570\u7ec4\u7684\u957f\u5ea6\uff08\u5373\u53ef\u4ee5\u5b58\u50a8\u591a\u5c11\u5143\u7d20\uff09\u4e5f\u5728\u5f00\u59cb\u65f6\u5b9a\u4e49\uff0c\u5e76\u4e14\u4e0d\u80fd\u66f4\u6539\u3002<\/p>\n<p>\u5728Java\u4e2d\uff0c\u6570\u7ec4\u53d1\u6325\u4e86\u57fa\u7840\u4f5c\u7528\uff0c\u56e0\u4e3a\u8bb8\u591a\u6838\u5fc3\u6570\u636e\u7c7b\u578b\u90fd\u662f\u57fa\u4e8e\u5b83\u4eec\u6784\u5efa\u7684\u3002\u4f8b\u5982\uff0c\u9891\u7e41\u4f7f\u7528\u7684\u5f15\u7528\u7c7b\u578b<code>String<\/code>\u5b9e\u9645\u4e0a\u662f\u7531<code>char<\/code>\u5143\u7d20\u7684\u6570\u7ec4\u5b9e\u73b0\u7684\u3002\u6240\u4ee5\u5373\u4f7f\u60a8\u53ef\u80fd\u4e0d\u77e5\u9053\uff0c\u60a8\u5df2\u7ecf\u4f7f\u7528\u8fc7\u6570\u7ec4\u4e86\u3002<\/p>\n<p>\u5728\u672c\u6559\u7a0b\u4e2d\uff0c\u60a8\u5c06\u4f7f\u7528\u4e00\u4e2a<code>char<\/code>\u6570\u7ec4\u6765\u5b89\u5168\u5730\u5b58\u50a8\u5bc6\u7801\u3002\u8fd9\u662f\u6570\u7ec4\u7684\u4e00\u4e2a\u5e38\u89c1\u7528\u4f8b\u3002<code>char<\/code>\u6570\u7ec4\u662f\u6bd4<code>String<\/code>\u66f4\u597d\u7684\u5b58\u50a8\u5bc6\u7801\u7684\u9009\u62e9\uff0c\u56e0\u4e3a<code>String<\/code>\u5bf9\u8c61\u662f\u4e0d\u53ef\u53d8\u7684\u2014\u2014\u4e5f\u5c31\u662f\u8bf4\uff0c\u5b83\u4e0d\u80fd\u88ab\u8986\u76d6\u3002\u56e0\u6b64\uff0c\u5373\u4f7f\u60a8\u53ef\u80fd\u4e0d\u518d\u9700\u8981\u4e00\u4e2a\u5bc6\u7801<code>String<\/code>\u5bf9\u8c61\uff0c\u60a8\u4e5f\u65e0\u6cd5\u76f4\u63a5\u5904\u7406\u6389\u5b83\u3002\u8fd9\u610f\u5473\u7740\u8be5\u5bf9\u8c61\u4f1a\u4fdd\u7559\u5728\u5185\u5b58\u4e2d\uff0c\u7ed3\u679c\u662f\u653b\u51fb\u8005\u7406\u8bba\u4e0a\u53ef\u4ee5\u8bbf\u95ee\u8fd9\u90e8\u5206\u5185\u5b58\u5e76\u8bfb\u53d6\u5bc6\u7801\u3002\u76f8\u6bd4\u4e4b\u4e0b\uff0c\u60a8\u53ef\u4ee5\u8f7b\u677e\u5730\u8986\u76d6\u5b58\u50a8\u4e3a<code>char<\/code>\u6570\u7ec4\u7684\u5bc6\u7801\uff0c\u4f7f\u5176\u65e0\u6cd5\u4f7f\u7528\u3002\u56e0\u6b64\uff0c\u653b\u51fb\u8005\u6ca1\u6709\u673a\u4f1a\u901a\u8fc7\u68c0\u67e5\u5185\u5b58\u6765\u83b7\u53d6\u5bc6\u7801\u3002<\/p>\n<h2>\u5148\u51b3\u6761\u4ef6<\/h2>\n<p>\u8981\u5b66\u4e60\u672c\u6559\u7a0b\uff0c\u60a8\u9700\u8981\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>\u4e00\u4e2a\u53ef\u4ee5\u6267\u884cJava\u7a0b\u5e8f\u7684\u73af\u5883\uff0c\u4ee5\u4fbf\u8ddf\u968f\u793a\u4f8b\u3002\u8981\u5728\u60a8\u7684\u672c\u5730\u673a\u5668\u4e0a\u8bbe\u7f6e\u6b64\u73af\u5883\uff0c\u60a8\u9700\u8981\uff1a<\/li>\n<\/ul>\n<ul class=\"post-ul\">\n<li>\u673a\u5668\u4e0a\u5b89\u88c5\u4e86Java\uff08\u7248\u672c11\u6216\u66f4\u9ad8\uff09\uff0c\u5e76\u5e26\u6709Java\u5f00\u53d1\u5de5\u5177\u5305\uff08JDK\uff09\u63d0\u4f9b\u7684\u7f16\u8bd1\u5668\u3002\u5bf9\u4e8eUbuntu\u548cDebian\uff0c\u8bf7\u9075\u5faa\u6211\u4eec\u6559\u7a0b\u300a\u5982\u4f55\u5728Ubuntu 22.04\u4e0a\u4f7f\u7528Apt\u5b89\u88c5Java\u300b\u4e2d\u9009\u98791\u7684\u6b65\u9aa4\u3002\u5bf9\u4e8e\u5305\u62ecMac\u548cWindows\u5728\u5185\u7684\u5176\u4ed6\u64cd\u4f5c\u7cfb\u7edf\uff0c\u8bf7\u9075\u5faaJava\u5b89\u88c5\u7684\u4e0b\u8f7d\u9009\u9879\u3002<\/li>\n<li>\u4e3a\u4e86\u7f16\u8bd1\u548c\u8fd0\u884c\u4ee3\u7801\u793a\u4f8b\uff0c\u672c\u6559\u7a0b\u4f7f\u7528Java Shell\uff0c\u5b83\u662f\u4e00\u4e2a\u4ece\u547d\u4ee4\u884c\u8fd0\u884c\u7684\u8bfb\u53d6-\u8bc4\u4f30-\u6253\u5370\u5faa\u73af\uff08REPL\uff09\u3002\u8981\u5f00\u59cb\u4f7f\u7528JShell\uff0c\u8bf7\u67e5\u770b\u300aJShell\u5165\u95e8\u6307\u5357\u300b\u3002\u4e3a\u907f\u514d\u91cd\u590d\u8bf4\u660e\uff0c\u6240\u6709\u793a\u4f8b\u90fd\u5728\u4e00\u4e2aJShell\u4f1a\u8bdd\u4e2d\u6267\u884c\u5e76\u4f7f\u7528\u76f8\u540c\u7684\u53d8\u91cf\u3002<\/li>\n<\/ul>\n<ul class=\"post-ul\">\n<li>\u719f\u6089Java\u548c\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff0c\u60a8\u53ef\u4ee5\u5728\u6211\u4eec\u7684\u6559\u7a0b\u300a\u5982\u4f55\u7f16\u5199\u60a8\u7684\u7b2c\u4e00\u4e2aJava\u7a0b\u5e8f\u300b\u4e2d\u627e\u5230\u76f8\u5173\u5185\u5bb9\u3002<\/li>\n<li>\u7406\u89e3Java\u6570\u636e\u7c7b\u578b\uff0c\u8fd9\u5728\u6211\u4eec\u7684\u6559\u7a0b\u300a\u7406\u89e3Java\u6570\u636e\u7c7b\u578b\u300b\u4e2d\u6709\u6240\u8ba8\u8bba\u3002<\/li>\n<\/ul>\n<h2>\u521b\u5efa\u6570\u7ec4<\/h2>\n<p>\u8981\u5f00\u59cb\u4f7f\u7528\u6570\u7ec4\uff0c\u60a8\u5fc5\u987b\u9996\u5148\u521b\u5efa\u5b83\u3002\u6709\u51e0\u79cd\u65b9\u6cd5\u53ef\u4ee5\u521b\u5efa\u6570\u7ec4\uff0c\u521b\u5efa\u65b9\u5f0f\u53d6\u51b3\u4e8e\u60a8\u662f\u5426\u77e5\u9053\u6570\u7ec4\u5c06\u5305\u542b\u54ea\u4e9b\u5143\u7d20\u3002<\/p>\n<div class=\"post-conf-info\">\n<p class=\"post-conf-desc\"><strong>\u4fe1\u606f\uff1a<\/strong>\u8981\u8ddf\u968f\u672c\u6559\u7a0b\u4e2d\u7684\u793a\u4f8b\u4ee3\u7801\uff0c\u8bf7\u901a\u8fc7\u8fd0\u884c<code>jshell<\/code>\u547d\u4ee4\u5728\u60a8\u7684\u672c\u5730\u7cfb\u7edf\u4e0a\u6253\u5f00Java Shell\u5de5\u5177\u3002\u7136\u540e\uff0c\u60a8\u53ef\u4ee5\u590d\u5236\u3001\u7c98\u8d34\u6216\u7f16\u8f91\u793a\u4f8b\uff0c\u5c06\u5176\u6dfb\u52a0\u5230<code>jshell&gt;<\/code>\u63d0\u793a\u7b26\u540e\u5e76\u6309\u56de\u8f66\u952e\u3002\u8981\u9000\u51fajshell\uff0c\u8bf7\u952e\u5165<code>\/exit<\/code>\u3002<\/p>\n<\/div>\n<p>\u8fd9\u662f\u6587\u7ae0\u300a\u5982\u4f55\u5728Java\u4e2d\u4f7f\u7528\u6570\u7ec4\u300b\u7684\u7b2c2\u90e8\u5206\uff08\u51716\u90e8\u5206\uff09\u3002<\/p>\n<p>\u5982\u679c\u60a8\u4e0d\u77e5\u9053\u6570\u7ec4\u5143\u7d20\uff0c\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u7a7a\u6570\u7ec4\u5e76\u5b9a\u4e49\u5176\u5927\u5c0f\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre class=\"post-pre\"><code><ol>\r\n <li>char<mark><span>[]<\/span><\/mark> password <span>=<\/span> new char<mark><span>[6]<\/span><\/mark><span>;<\/span><\/li>\r\n<\/ol><\/code><\/pre>\n<p><code>char<\/code> \u5173\u952e\u5b57\u540e\u7684 <code>[]<\/code> \u7ec4\u5408\u5c06\u53d8\u91cf <code>password<\/code> \u5b9a\u4e49\u4e3a\u4e00\u4e2a\u6570\u7ec4\u3002<code>char<\/code> \u5173\u952e\u5b57\u8868\u793a\u8be5\u53d8\u91cf\u5b58\u50a8\u5b57\u7b26\u57fa\u672c\u7c7b\u578b\u3002\u8981\u521b\u5efa\u6570\u7ec4\u5bf9\u8c61\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 <code>new<\/code> \u5173\u952e\u5b57\uff0c\u5e76\u5c06\u6570\u7ec4\u5b9a\u4e49\u4e3a <code>char[6]<\/code>\uff0c\u8fd9\u610f\u5473\u7740\u5b83\u662f\u4e00\u4e2a\u5305\u542b\u516d\u4e2a\u5b57\u7b26\u57fa\u672c\u7c7b\u578b\u5143\u7d20\u7684\u6570\u7ec4\u3002<\/p>\n<p>\u8fd0\u884c\u4e0a\u8ff0\u4ee3\u7801\u540e\uff0c\u60a8\u5c06\u6536\u5230\u4ee5\u4e0b\u8f93\u51fa\uff1a<\/p>\n<pre class=\"post-pre\"><code><ol>\r\n <li>password <span>==&gt;<\/span> char<span>[6]<\/span> <span>{<\/span> <span>'\\000'<\/span>, <span>'\\000'<\/span>, <span>'\\000'<\/span>, <span>'\\000'<\/span>, <span>'\\000'<\/span>, <span>'\\000'<\/span> <span>}<\/span><\/li>\r\n<\/ol><\/code><\/pre>\n<p>\u8f93\u51fa\u786e\u8ba4\u5df2\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a <code>password<\/code> \u7684\u65b0\u5b57\u7b26\u6570\u7ec4\u3002\u5b83\u53ef\u4ee5\u5b58\u50a8\u516d\u4e2a\u5143\u7d20\uff08<code>[6]<\/code>\uff09\uff0c\u8fd9\u4e9b\u5143\u7d20\u76ee\u524d\u4e3a\u7a7a\uff08<code>\\000<\/code>\uff09\u3002<\/p>\n<p>\u6216\u8005\uff0c\u5982\u679c\u60a8\u5df2\u7ecf\u77e5\u9053\u6570\u7ec4\u5143\u7d20\uff0c\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a <code>password<\/code> \u7684\u5b57\u7b26\u6570\u7ec4\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre class=\"post-pre\"><code><ol>\r\n <li>char<span>[]<\/span> password <span>=<\/span> new char<span>[]<\/span> <mark><span>{<\/span><span>'s'<\/span>, <span>'e'<\/span>, <span>'c'<\/span>, <span>'r'<\/span>, <span>'e'<\/span>, <span>'t'<\/span><span>}<\/span><\/mark><span>;<\/span><\/li>\r\n<\/ol><\/code><\/pre>\n<p>\u8bed\u53e5\u7b49\u53f7\u5de6\u4fa7\u7684\u90e8\u5206\u4e0e\u7b2c\u4e00\u4e2a\u7a7a\u6570\u7ec4\u793a\u4f8b\u4e2d\u7684\u8bed\u53e5\u5de6\u4fa7\u90e8\u5206\u76f8\u540c\u2014\u2014\u5b9a\u4e49\u4e86\u4e00\u4e2a\u540d\u4e3a <code>password<\/code> \u7684\u5b57\u7b26\u6570\u7ec4\u3002\u8bed\u53e5\u7b49\u53f7\u53f3\u4fa7\u7684\u7b2c\u4e8c\u90e8\u5206\u518d\u6b21\u4ee5 <code>new<\/code> \u5173\u952e\u5b57\u5f00\u5934\uff1b\u4f46\u662f\uff0c\u5143\u7d20\u7684\u6570\u91cf\u6ca1\u6709\u660e\u786e\u7ed9\u51fa\u3002\u76f8\u53cd\uff0c\u6240\u6709\u516d\u4e2a\u5143\u7d20\u90fd\u5df2\u5217\u51fa\u3002\u5217\u8868\u4ee5\u5de6\u62ec\u53f7\u5f00\u5934\uff0c\u540e\u8ddf\u516d\u4e2a\u5143\u7d20\u3002\u7531\u4e8e\u5143\u7d20\u662f\u5b57\u7b26\u57fa\u672c\u7c7b\u578b\uff0c\u5b83\u4eec\u7528\u5355\u5f15\u53f7\uff08<code>'<\/code>\uff09\u62ec\u8d77\u6765\u3002\u5217\u8868\u4ee5\u53f3\u62ec\u53f7\u7ed3\u675f\u3002<\/p>\n<p>\u5f53\u60a8\u5c06\u4e0a\u8ff0\u4ee3\u7801\u7c98\u8d34\u5230 jshell \u4e2d\u65f6\uff0c\u60a8\u5c06\u83b7\u5f97\u4ee5\u4e0b\u8f93\u51fa\uff1a<\/p>\n<div class=\"secondary-code-label\" title=\"Output\">\u8f93\u51fa<\/p>\n<pre class=\"post-pre\"><code>password ==&gt; char[6] { 's', 'e', 'c', 'r', 'e', 't' }\r\n<\/code><\/pre>\n<\/div>\n<p>\u8f93\u51fa\u786e\u8ba4 <code>password<\/code> \u5b57\u7b26\u6570\u7ec4\u5df2\u521b\u5efa\uff0c\u5e76\u4e14\u5176\u5143\u7d20\u5df2\u5217\u51fa\u3002<\/p>\n<p>\u5728\u540e\u4e00\u4e2a\u793a\u4f8b\u4e2d\uff0c\u60a8\u5728\u521b\u5efa\u6570\u7ec4\u65f6\u6307\u5b9a\u4e86\u5143\u7d20\u3002\u8fd9\u4f7f\u60a8\u65e0\u9700\u7f16\u5199\u989d\u5916\u7684\u6307\u4ee4\u6765\u4e3a\u5143\u7d20\u8d4b\u503c\u3002\u8fd9\u5c31\u662f\u4ee5\u8fd9\u79cd\u65b9\u5f0f\u521b\u5efa\u6570\u7ec4\u7684\u597d\u5904\u3002\u6216\u8005\uff0c\u60a8\u53ef\u4ee5\u7f16\u5199\u4ee3\u7801\u6765\u586b\u5145\u5143\u7d20\uff0c\u6bcf\u4e2a\u65b0\u5143\u7d20\u90fd\u5355\u72ec\u5b9a\u4e49\u3002\u63a5\u4e0b\u6765\u60a8\u5c06\u8fdb\u884c\u6b64\u64cd\u4f5c\u3002<\/p>\n<h2>\u6307\u5b9a\u548c\u4fee\u6539\u6570\u7ec4\u5143\u7d20<\/h2>\n<p>\u8fd9\u662f\u6587\u7ae0\u300a\u5982\u4f55\u5728Java\u4e2d\u4f7f\u7528\u6570\u7ec4\u300b\u7684\u7b2c3\u90e8\u5206\uff08\u51716\u90e8\u5206\uff09\u3002<\/p>\n<p>\u60a8\u5e76\u975e\u603b\u80fd\u9884\u5148\u77e5\u9053\u6570\u7ec4\u4e2d\u7684\u6240\u6709\u5143\u7d20\uff0c\u56e0\u6b64\u5728\u521b\u5efa\u6570\u7ec4\u65f6\u5c31\u6307\u5b9a\u5b83\u4eec\u53ef\u80fd\u4e0d\u662f\u4e00\u4e2a\u53ef\u884c\u7684\u9009\u62e9\u3002\u65e0\u8bba\u60a8\u6700\u521d\u662f\u5426\u6307\u5b9a\u4e86\u6570\u7ec4\u5143\u7d20\uff0c\u60a8\u90fd\u53ef\u4ee5\u968f\u65f6\u5728\u540e\u7eed\u64cd\u4f5c\u4e2d\u6307\u5b9a\u6216\u66f4\u6539\u5b83\u4eec\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u60a8\u53ef\u4ee5\u901a\u8fc7\u5f15\u7528\u5bc6\u7801\u6570\u7ec4\u7684\u7d22\u5f15\uff08\u5373\u5b83\u5728\u6570\u7ec4\u4e2d\u7684\u4f4d\u7f6e\uff09\u6765\u66f4\u6539\u5176\u5143\u7d20\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<ol>\n<li data-prefix=\"jshell&gt;\">password<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">=<\/span> <span class=\"token string\">&#8216;n&#8217;<\/span><span class=\"token punctuation\">;<\/span><\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>\u901a\u8fc7\u4f7f\u7528 <code>password[0]<\/code>\uff0c\u60a8\u6b63\u5728\u5f15\u7528 <code>password<\/code> \u6570\u7ec4\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\u3002\u6570\u7ec4\u5143\u7d20\u4ece\u7d22\u5f15 0 \u5f00\u59cb\u7f16\u53f7\uff0c\u56e0\u6b64\u7b2c\u4e00\u4e2a\u5143\u7d20\u7684\u7d22\u5f15\u4e3a 0\uff0c\u5982\u672c\u4f8b\u6240\u793a\u3002\u6570\u7ec4\u5143\u7d20\u7684\u7d22\u5f15\u53f7\u59cb\u7ec8\u7528\u65b9\u62ec\u53f7 <code>[]<\/code> \u62ec\u8d77\u6765\u3002\u60a8\u91cd\u65b0\u5b9a\u4e49\u4e86\u6570\u7ec4\u5143\u7d20\u5e76\u4e3a\u5176\u5206\u914d\u4e86\u4e00\u4e2a\u65b0\u503c\u2014\u2014\u5b57\u7b26\u539f\u59cb\u7c7b\u578b <code>'n'<\/code>\u3002<\/p>\n<p>\u5728 jshell \u4e2d\u6267\u884c\u4e0a\u8ff0\u8bed\u53e5\u540e\uff0c\u60a8\u5c06\u83b7\u5f97\u7c7b\u4f3c\u4e8e\u4ee5\u4e0b\u5185\u5bb9\u7684\u8f93\u51fa\uff1a<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<div class=\"secondary-code-label\" title=\"Output\">\u8f93\u51fa<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>$8 ==&gt; &#8216;n&#8217;<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<\/div>\n<p>\u4e34\u65f6\u53d8\u91cf <code>$8<\/code> \u5728 jshell \u5185\u90e8\u4f7f\u7528\u3002\u5728\u60a8\u7684\u60c5\u51b5\u4e0b\uff0c\u5b83\u53ef\u80fd\u662f\u4e00\u4e2a\u4e0d\u540c\u7684\u6570\u5b57\u3002<\/p>\n<p>jshell \u4e2d\u6709\u4e00\u4e2a\u72ec\u7279\u7684\u529f\u80fd\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u5b83\u6765\u786e\u8ba4 <code>password<\/code> \u6570\u7ec4\u662f\u5426\u5df2\u6309\u60a8\u9884\u671f\u7684\u65b9\u5f0f\u66f4\u6539\u3002\u5f53\u60a8\u5728 jshell \u4e2d\u7c98\u8d34\u6570\u7ec4\u7684\u540d\u79f0\uff08\u5728\u672c\u4f8b\u4e2d\u4e3a <code>password<\/code>\uff09\u65f6\uff0c\u5b83\u5c06\u6253\u5370\u6570\u7ec4\u53ca\u5176\u5143\u7d20\uff0c\u800c\u65e0\u9700\u989d\u5916\u7684\u65b9\u6cd5\uff1a<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<ol>\n<li data-prefix=\"jshell&gt;\">password<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>\u60a8\u5c06\u5728 jshell \u4e2d\u83b7\u5f97\u4ee5\u4e0b\u8f93\u51fa\uff1a<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<div class=\"secondary-code-label\" title=\"Output\">\u8f93\u51fa<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>password ==&gt; char[6] { &#8216;n&#8217;, &#8216;e&#8217;, &#8216;c&#8217;, &#8216;r&#8217;, &#8216;e&#8217;, &#8216;t&#8217; }<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<\/div>\n<p>\u6b64\u8f93\u51fa\u786e\u8ba4\u60a8\u5df2\u6210\u529f\u5c06 <code>password<\/code> \u5b57\u7b26\u6570\u7ec4\u4ece &#8216;s&#8217;, &#8216;e&#8217;, &#8216;c&#8217;, &#8216;r&#8217;, &#8216;e&#8217;, &#8216;t&#8217; \u66f4\u6539\u4e3a &#8216;n&#8217;, &#8216;e&#8217;, &#8216;c&#8217;, &#8216;r&#8217;, &#8216;e&#8217;, &#8216;t&#8217;\u3002\u73b0\u5728\uff0c\u5982\u679c\u653b\u51fb\u8005\u83b7\u5f97\u5bf9\u60a8\u670d\u52a1\u5668\u7684\u8bbf\u95ee\u6743\u9650\uff0c\u4ed6\u4eec\u5c06\u83b7\u5f97\u66f4\u6539\u540e\u7684\u5bc6\u7801\u800c\u4e0d\u662f\u539f\u59cb\u5bc6\u7801\u3002\u6216\u8005\uff0c\u5982\u679c\u60a8\u4f7f\u7528 <code>String<\/code> \u53d8\u91cf\u5b58\u50a8\u5bc6\u7801\uff0c\u5373\u4f7f\u60a8\u4e3a\u5176\u91cd\u65b0\u5206\u914d\u4e86\u65b0\u503c\uff0c\u65e7\u503c\u5bf9\u8c61\u4ecd\u5c06\u5728\u5185\u5b58\u4e2d\u4fdd\u7559\u4e00\u6bb5\u65f6\u95f4\uff0c\u653b\u51fb\u8005\u53ef\u80fd\u4f1a\u8bfb\u53d6\u5b83\u3002<\/p>\n<p>\u5728\u672c\u6559\u7a0b\u4e2d\uff0c\u60a8\u5c06\u7ee7\u7eed\u4f7f\u7528 <code>password<\/code> \u6570\u7ec4\uff0c\u56e0\u6b64\u4e3a\u4e86\u4fdd\u6301\u4e00\u81f4\u6027\uff0c\u8bf7\u901a\u8fc7\u518d\u6b21\u5f15\u7528\u5b83\u5e76\u5728 jshell \u4e2d\u6267\u884c\u547d\u4ee4\uff0c\u5c06\u7b2c\u4e00\u4e2a\u5143\u7d20\u7684\u503c\u6062\u590d\u4e3a &#8216;s&#8217;\uff1a<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<ol>\n<li data-prefix=\"jshell&gt;\">password<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">=<\/span> <span class=\"token string\">&#8216;s&#8217;<\/span><span class=\"token punctuation\">;<\/span><\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>\u8fd9\u5c06\u4ea7\u751f\u7c7b\u4f3c\u4e8e\u524d\u9762\u5e26\u6709\u4e34\u65f6\u53d8\u91cf\u7684\u8f93\u51fa\uff08\u5728\u672c\u4f8b\u4e2d\u4e3a <code>$25<\/code>\uff09\uff0c\u8fd9\u786e\u8ba4\u66f4\u6539\u6210\u529f\uff1a<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<div class=\"secondary-code-label\" title=\"Output\">\u8f93\u51fa<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>$25 ==&gt; &#8216;s&#8217;<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<\/div>\n<p>\u60a8\u518d\u6b21\u62e5\u6709\u539f\u59cb\u7684 <code>password<\/code> \u6570\u7ec4\uff0c\u5176\u5143\u7d20\u4e3a &#8216;s&#8217;, &#8216;e&#8217;, &#8216;c&#8217;, &#8216;r&#8217;, &#8216;e&#8217;, &#8216;t&#8217;\u3002\u73b0\u5728\u60a8\u5df2\u7ecf\u77e5\u9053\u5982\u4f55\u521b\u5efa\u548c\u4fee\u6539\u6570\u7ec4\u7684\u5143\u7d20\uff0c\u662f\u65f6\u5019\u5f00\u59cb\u8bfb\u53d6\u548c\u4f7f\u7528\u5176\u5143\u7d20\u4e86\u3002<\/p>\n<h2>\u83b7\u53d6\u6570\u7ec4\u5143\u7d20<\/h2>\n<p>\u5f53\u83b7\u53d6\u7279\u5b9a\u7684\u6570\u7ec4\u5143\u7d20\u65f6\uff0c\u60a8\u5c06\u4f7f\u7528\u5176\u7d22\u5f15\u3002\u4f8b\u5982\uff0c\u8981\u83b7\u53d6 <code>password<\/code> \u6570\u7ec4\u7684\u7b2c\u4e8c\u4e2a\u5143\u7d20\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<ol>\n<li data-prefix=\"jshell&gt;\">System.out.println<span class=\"token punctuation\">(<\/span>password<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>\u5728\u6b64\u4ee3\u7801\u4e2d\uff0c\u60a8\u4f7f\u7528 <code>println()<\/code> \u65b9\u6cd5\u6253\u5370 <code>password<\/code> \u6570\u7ec4\u7684\u7b2c\u4e8c\u4e2a\u5143\u7d20\u3002\uff08\u6709\u5173 <code>System.out.println<\/code> \u8bed\u53e5\u7684\u66f4\u591a\u4fe1\u606f\uff0c\u8bf7\u67e5\u770b\u6211\u4eec\u7684\u6559\u7a0b\u300a\u5982\u4f55\u5728Java\u4e2d\u7f16\u5199\u60a8\u7684\u7b2c\u4e00\u4e2a\u7a0b\u5e8f\u300b\u3002\uff09\u7b2c\u4e8c\u4e2a\u5143\u7d20\u7684\u7d22\u5f15\u4e3a 1\uff0c\u56e0\u4e3a\u5982\u524d\u6240\u8ff0\uff0c\u6570\u7ec4\u5143\u7d20\u4ece 0 \u5f00\u59cb\u7f16\u53f7\u3002<\/p>\n<p>\u6b64\u4ee3\u7801\u5c06\u4ea7\u751f\u4ee5\u4e0b\u8f93\u51fa\uff1a<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<div class=\"secondary-code-label\" title=\"Output\">\u8f93\u51fa<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>e<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<\/div>\n<p>\u8f93\u51fa\u6253\u5370\u4e86\u7b2c\u4e8c\u4e2a\u6570\u7ec4\u5143\u7d20 <code>e<\/code>\u3002\u5c31\u50cf\u6253\u5370\u5b83\u4e00\u6837\uff0c\u60a8\u53ef\u4ee5\u5728\u4efb\u4f55\u9002\u5408 <code>char<\/code> \u503c\u7684\u5730\u65b9\u4f7f\u7528\u5b83\u3002<\/p>\n<p>\u6b64\u5916\uff0c\u60a8\u8fd8\u53ef\u4ee5\u4f7f\u7528 <code>foreach<\/code> \u5faa\u73af\u904d\u5386\u6240\u6709\u6570\u7ec4\u5143\u7d20\uff0c\u5982\u6211\u4eec\u7684\u6559\u7a0b\u300a\u5982\u4f55\u5728Java\u4e2d\u4f7f\u7528\u5faa\u73af\u300b\u4e2d\u6240\u8ff0\u3002\u5faa\u73af\u662f\u4e00\u79cd\u63a7\u5236\u91cd\u590d\u7a0b\u5e8f\u6d41\u7a0b\u7684\u7ed3\u6784\uff0c\u800c <code>foreach<\/code> \u5faa\u73af\u5bf9\u4e8e\u904d\u5386\u6570\u7ec4\u7279\u522b\u6709\u7528\uff0c\u56e0\u4e3a\u5b83\u9700\u8981\u6700\u5c11\u7684\u6837\u677f\u4ee3\u7801\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<ol>\n<li data-prefix=\"jshell&gt;\"><span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span>char c <span class=\"token builtin class-name\">:<\/span> password<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><\/li>\n<li data-prefix=\"jshell&gt;\">System.out.print<span class=\"token punctuation\">(<\/span>c<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/li>\n<li data-prefix=\"jshell&gt;\"><span class=\"token punctuation\">}<\/span><\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>\u8fd9\u4e2a <code>foreach<\/code> \u5faa\u73af\u904d\u5386 <code>password<\/code> \u6570\u7ec4\uff0c\u5e76\u4f7f\u7528\u4e00\u4e2a\u540d\u4e3a <code>c<\/code> \u7684\u4e34\u65f6 <code>char<\/code> \u53d8\u91cf\u3002\u5728\u6bcf\u6b21\u8fed\u4ee3\u4e2d\uff0c<code>c<\/code> \u4ece <code>password<\/code> \u6570\u7ec4\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\u79fb\u52a8\u5230\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u3002\u4e00\u65e6 <code>c<\/code> \u83b7\u5f97\u6570\u7ec4\u5143\u7d20\u7684\u503c\uff0c\u60a8\u5c31\u53ef\u4ee5\u5728\u4ee3\u7801\u5757\u5185\u4ee5\u4efb\u4f55\u5408\u9002\u7684\u65b9\u5f0f\u4f7f\u7528 <code>c<\/code>\u3002\u5728\u524d\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u60a8\u4f7f\u7528 <code>print()<\/code> \u65b9\u6cd5\u6253\u5370 <code>c<\/code>\u3002<\/p>\n<p>\u8bf7\u6ce8\u610f\uff0c<code>print()<\/code> \u65b9\u6cd5\u6253\u5370\u53c2\u6570\u65f6\u4e0d\u5e26\u6362\u884c\u7b26\u3002\u76f8\u6bd4\u4e4b\u4e0b\uff0c\u5230\u76ee\u524d\u4e3a\u6b62\u7684\u6559\u7a0b\u4e2d\uff0c\u60a8\u4e00\u76f4\u4f7f\u7528 <code>println()<\/code> \u65b9\u6cd5\uff0c\u8be5\u65b9\u6cd5\u6bcf\u6b21\u8fd0\u884c\u65f6\u90fd\u4f1a\u7559\u4e0b\u4e00\u4e2a\u65b0\u884c\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c<code>print()<\/code> \u66f4\u9002\u5408\uff0c\u56e0\u4e3a\u5b83\u4f1a\u5c06 <code>password<\/code> \u6570\u7ec4\u4e2d\u7684\u6240\u6709\u5143\u7d20\u6253\u5370\u5728\u540c\u4e00\u884c\u4e0a\uff0c\u7ed3\u679c\u5c06\u66f4\u597d\u5730\u53ef\u89c6\u5316\u4e3a\u4e00\u4e2a\u5355\u8bcd\uff08\u201csecret\u201d\uff09\u3002<\/p>\n<p>\u5982\u679c\u60a8\u4e25\u683c\u6309\u7167\u524d\u9762\u7684\u6b65\u9aa4\u64cd\u4f5c\u5e76\u5728 jshell \u4e2d\u8fd0\u884c\u6b64\u4ee3\u7801\uff0c\u60a8\u5c06\u83b7\u5f97\u4ee5\u4e0b\u8f93\u51fa\uff1a<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<div class=\"secondary-code-label\" title=\"Output\">\u8f93\u51fa<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>secret<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<\/div>\n<p>\u5982\u679c\u60a8\u5fd8\u8bb0\u4e86\u5c06\u7b2c\u4e00\u4e2a\u6570\u7ec4\u5143\u7d20\u4ece <code>n<\/code> \u91cd\u7f6e\u56de <code>s<\/code> \u7684\u6b65\u9aa4\uff0c\u60a8\u5c06\u5f97\u5230 <code>necret<\/code> \u800c\u4e0d\u662f <code>secret<\/code>\u3002<\/p>\n<p>\u7ed3\u5408\u60a8\u76ee\u524d\u6240\u5b66\u7684\u77e5\u8bc6\uff0c\u60a8\u53ef\u4ee5\u83b7\u53d6\u6570\u7ec4\u7684\u6240\u6709\u5143\u7d20\u3002\u4ece\u73b0\u5728\u5f00\u59cb\uff0c\u60a8\u5df2\u51c6\u5907\u597d\u6df1\u5165\u7814\u7a76\u6570\u7ec4\u4e3b\u9898\u5e76\u5b66\u4e60\u7528\u4e8e\u6267\u884c\u5404\u79cd\u529f\u80fd\u7684\u6709\u7528\u6570\u7ec4\u65b9\u6cd5\u3002<\/p>\n<h2>\u4f7f\u7528\u6570\u7ec4\u65b9\u6cd5<\/h2>\n<p>Java \u5728 <code>java.util<\/code> \u5305\u4e2d\u6709\u4e00\u4e2a\u975e\u5e38\u6709\u7528\u7684 <code>Arrays<\/code> \u7c7b\u3002\u8fd9\u4e2a\u7c7b\u901a\u8fc7\u63d0\u4f9b\u7528\u4e8e\u5e38\u89c1\u7528\u4f8b\u7684\u6709\u7528\u65b9\u6cd5\u6765\u5e2e\u52a9\u60a8\u5904\u7406\u6570\u7ec4\u3002\u8fd9\u610f\u5473\u7740\u60a8\u4e0d\u5fc5\u91cd\u590d\u9020\u8f6e\u5b50\uff0c\u53ef\u4ee5\u8282\u7701\u5197\u4f59\u7684\u5de5\u4f5c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u6700\u5e38\u7528\u7684\u65b9\u6cd5\uff1a<\/p>\n<h3>equals() \u65b9\u6cd5<\/h3>\n<p>\u8fd9\u662f\u6587\u7ae0\u300a\u5982\u4f55\u5728Java\u4e2d\u4f7f\u7528\u6570\u7ec4\u300b\u7684\u7b2c5\u90e8\u5206\uff08\u51716\u90e8\u5206\uff09\u3002<\/p>\n<p><code>equals()<\/code> \u65b9\u6cd5\u7528\u4e8e\u6bd4\u8f83\u4e24\u4e2a\u6570\u7ec4\u662f\u5426\u76f8\u7b49\u3002\u8981\u4f7f\u4e24\u4e2a\u6570\u7ec4\u76f8\u7b49\uff0c\u5b83\u4eec\u5fc5\u987b\u5177\u6709\u76f8\u540c\u7684\u957f\u5ea6\u3001\u5143\u7d20\u548c\u987a\u5e8f\u3002\u7ee7\u7eed\u4ee5\u5bc6\u7801\u6570\u7ec4\u4e3a\u4f8b\uff0c\u60a8\u5c06\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a <code>password2<\/code> \u7684\u7b2c\u4e8c\u4e2a\u6570\u7ec4\uff0c\u5176\u4e2d\u5305\u542b\u5b57\u7b26 &#8216;n&#8217;\u3001&#8217;o&#8217;\u3001&#8217;n&#8217; \u548c &#8216;e&#8217;\uff1a<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<ol>\n<li data-prefix=\"jshell&gt;\">char[] password2 = new char[] {&#8216;n&#8217;, &#8216;o&#8217;, &#8216;n&#8217;, &#8216;e&#8217;};<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>\u5728 jshell \u4e2d\u8fd0\u884c\u6b64\u4ee3\u7801\u540e\uff0c\u60a8\u5c06\u83b7\u5f97\u4ee5\u4e0b\u786e\u8ba4\uff1a<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<div class=\"secondary-code-label\" title=\"Output\">\u8f93\u51fa<\/div>\n<pre class=\"post-pre\"><code>password2 ==&gt; char[4] { 'n', 'o', 'n', 'e' }<\/code><\/pre>\n<p>\u4e0a\u8ff0\u8f93\u51fa\u786e\u8ba4\u60a8\u5df2\u62e5\u6709 <code>password2<\/code> \u6570\u7ec4\u3002\u5b83\u6709\u56db\u4e2a\u5143\u7d20\uff0c\u5e76\u4e14\u8fd9\u4e9b\u5143\u7d20\u4e5f\u5df2\u6253\u5370\u51fa\u6765\u3002\u5982\u679c\u60a8\u5c1a\u672a\u9000\u51fa\u4e4b\u524d\u7684 jshell \u4f1a\u8bdd\uff0c\u60a8\u8fd8\u5c06\u62e5\u6709\u539f\u59cb\u7684 <code>password<\/code> \u6570\u7ec4\u3002\u5982\u679c\u60a8\u5df2\u9000\u51fa jshell \u4f1a\u8bdd\uff0c\u5219\u5fc5\u987b\u4f7f\u7528\u201c\u521b\u5efa\u6570\u7ec4\u201d\u4e2d\u7684\u6b65\u9aa4\u91cd\u65b0\u521b\u5efa <code>password<\/code> \u6570\u7ec4\uff0c\u4ee5\u4fbf\u60a8\u62e5\u6709\u4e24\u4e2a\u53ef\u4ee5\u6bd4\u8f83\u7684\u6570\u7ec4\u3002<\/p>\n<p>\u73b0\u5728\u60a8\u53ef\u4ee5\u6bd4\u8f83\u8fd9\u4e24\u4e2a\u6570\u7ec4\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<ol>\n<li data-prefix=\"jshell&gt;\">System.out.println(Arrays.equals(password, password2));<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>\u5728\u4e0a\u9762\u8fd9\u884c\u4ee3\u7801\u4e2d\uff0c\u60a8\u6b63\u5728\u4f7f\u7528 <code>println()<\/code> \u65b9\u6cd5\u6253\u5370 <code>Arrays.equals()<\/code> \u65b9\u6cd5\u6bd4\u8f83 <code>password<\/code> \u548c <code>password2<\/code> \u6570\u7ec4\u7684\u7ed3\u679c\u3002<\/p>\n<p>\u7531\u4e8e\u8fd9\u4e24\u4e2a\u6570\u7ec4\u4e0d\u540c\uff0c\u7ed3\u679c\u5c06\u4e3a <code>false<\/code>\uff1a<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<div class=\"secondary-code-label\" title=\"Output\">\u8f93\u51fa<\/div>\n<pre class=\"post-pre\"><code>false<\/code><\/pre>\n<p>\u8f93\u51fa <code>false<\/code> \u786e\u8ba4\u8fd9\u4e24\u4e2a\u6570\u7ec4\u4e0d\u76f8\u7b49\u3002\u4f5c\u4e3a\u7ec3\u4e60\uff0c\u521b\u5efa\u5176\u4ed6\u6570\u7ec4\u5e76\u8fdb\u884c\u6bd4\u8f83\u3002\u5982\u679c\u4e24\u4e2a\u6570\u7ec4\u76f8\u7b49\uff0c\u60a8\u5c06\u5f97\u5230 <code>true<\/code> \u7ed3\u679c\u3002<\/p>\n<h3><code>sort()<\/code> \u65b9\u6cd5<\/h3>\n<p><code>sort()<\/code> \u65b9\u6cd5\u6309\u5347\u5e8f\u5bf9\u6570\u7ec4\u5143\u7d20\u8fdb\u884c\u6392\u5e8f\u3002\u4f7f\u7528\u6b64\u65b9\u6cd5\uff0c\u60a8\u53ef\u4ee5\u901a\u8fc7\u8fd0\u884c\u4ee5\u4e0b\u4ee3\u7801\u5c06 <code>password<\/code> \u6570\u7ec4\u4e2d\u7684\u5b57\u7b26\u6309\u5b57\u6bcd\u987a\u5e8f\u6392\u5217\uff1a<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<ol>\n<li data-prefix=\"jshell&gt;\">Arrays.sort(password);<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>\u4e4b\u540e\uff0c\u60a8\u53ef\u4ee5\u901a\u8fc7\u5728 jshell \u4e2d\u76f4\u63a5\u8f93\u5165\u6570\u7ec4\u540d\u79f0\u6765\u518d\u6b21\u6253\u5370\u6570\u7ec4\uff0c\u4ee5\u67e5\u770b\u5176\u53d8\u5316\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<ol>\n<li data-prefix=\"jshell&gt;\">password;<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>jshell \u7684\u8f93\u51fa\u5c06\u662f\uff1a<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<div class=\"secondary-code-label\" title=\"Output\">\u8f93\u51fa<\/div>\n<pre class=\"post-pre\"><code>password ==&gt; char[6] { 'c', 'e', 'e', 'r', 's', 't' }<\/code><\/pre>\n<p>\u8fd9\u8bc1\u5b9e\u4e86\u6570\u7ec4\u4ecd\u7136\u5305\u542b\u76f8\u540c\u7684\u5143\u7d20\uff0c\u4f46\u5b83\u4eec\u7684\u987a\u5e8f\u5df2\u6539\u53d8\u3002\u6570\u7ec4\u5143\u7d20\u4ece &#8216;s&#8217;, &#8216;e&#8217;, &#8216;c&#8217;, &#8216;r&#8217;, &#8216;e&#8217;, &#8216;t&#8217; \u91cd\u65b0\u6392\u5e8f\u4e3a &#8216;c&#8217;, &#8216;e&#8217;, &#8216;e&#8217;, &#8216;r&#8217;, &#8216;s&#8217;, &#8216;t&#8217;\u3002\u50cf\u8fd9\u6837\u6539\u53d8\u6570\u7ec4\u7684\u987a\u5e8f\u53ef\u80fd\u4e0d\u662f\u4e00\u4e2a\u597d\u4e3b\u610f\uff0c\u56e0\u4e3a\u539f\u59cb\u987a\u5e8f\u53ef\u80fd\u5f88\u91cd\u8981\u3002\u5c31\u50cf\u5bc6\u7801\u7684\u60c5\u51b5\u4e00\u6837\uff0c\u5982\u679c\u60a8\u6539\u53d8\u987a\u5e8f\uff0c\u5bc6\u7801\u5c06\u4e0e\u539f\u59cb\u5bc6\u7801\u4e0d\u540c\uff0c\u5e76\u4e14\u5c06\u65e0\u6cd5\u4f7f\u7528\u3002\u7136\u800c\uff0c\u5728\u5176\u4ed6\u7528\u4f8b\u4e2d\uff0c\u6570\u7ec4\u5143\u7d20\u7684\u987a\u5e8f\u53ef\u80fd\u4e0d\u91cd\u8981\uff0c\u5e76\u4e14\u53ef\u80fd\u9700\u8981\u521d\u59cb\u6392\u5e8f\uff0c\u60a8\u5c06\u5728\u63a5\u4e0b\u6765\u4e86\u89e3\u5230\u3002<\/p>\n<h3><code>binarySearch()<\/code> \u65b9\u6cd5<\/h3>\n<p>\u8fd9\u662f\u6587\u7ae0\u300a\u5982\u4f55\u5728Java\u4e2d\u4f7f\u7528\u6570\u7ec4\u300b\u7684\u7b2c6\u90e8\u5206\uff08\u51716\u90e8\u5206\uff09\u3002<\/p>\n<p><code>binarySearch()<\/code> \u65b9\u6cd5\u7528\u4e8e\u5728\u6570\u7ec4\u5143\u7d20\u4e2d\u641c\u7d22\u7ed9\u5b9a\u503c\u3002\u8be5\u65b9\u6cd5\u7684\u4e00\u4e2a\u7279\u6b8a\u4e4b\u5904\u5728\u4e8e\uff0c\u5b83\u8981\u6c42\u6570\u7ec4\u5143\u7d20\u5fc5\u987b\u9996\u5148\u8fdb\u884c\u6392\u5e8f\uff1b\u5426\u5219\uff0c\u60a8\u5c06\u83b7\u5f97\u610f\u60f3\u4e0d\u5230\u7684\u7ed3\u679c\u3002\u56e0\u6b64\uff0c\u4e00\u65e6\u60a8\u5bf9 <code>password<\/code> \u6570\u7ec4\u8fdb\u884c\u4e86\u6392\u5e8f\uff0c\u5c31\u53ef\u4ee5\u67e5\u627e\u5143\u7d20\u7684\u7d22\u5f15\u3002\u4f8b\u5982\uff0c\u60a8\u53ef\u4ee5\u67e5\u627e\u5b57\u7b26 <code>'c'<\/code> \u5728 <code>password<\/code> \u6570\u7ec4\u4e2d\u7684\u7d22\u5f15\u5e76\u6253\u5370\u51fa\u6765\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<ol>\n<li data-prefix=\"jshell&gt;\">System.out.println(Arrays.binarySearch(password, &#8216;c&#8217;));<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>\u8fd9\u5c06\u4ea7\u751f\uff1a<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<div class=\"secondary-code-label\" title=\"Output\">\u8f93\u51fa<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>0<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<\/div>\n<p>\u56de\u60f3\u4e00\u4e0b\uff0c<code>password<\/code> \u6570\u7ec4\u73b0\u5728\u5df2\u6392\u5e8f\uff0c\u770b\u8d77\u6765\u50cf\u8fd9\u6837\uff1a&#8217;c&#8217;, &#8216;e&#8217;, &#8216;e&#8217;, &#8216;r&#8217;, &#8216;s&#8217;, &#8216;t&#8217;\u3002\u7531\u4e8e\u6253\u5370\u7684\u6570\u5b57\u662f 0\uff0c\u8fd9\u610f\u5473\u7740\u5b57\u7b26 &#8216;c&#8217; \u7684\u7d22\u5f15\u662f 0\uff0c\u56e0\u4e3a\u5b83\u662f\u7b2c\u4e00\u4e2a\u6570\u7ec4\u5143\u7d20\u3002<\/p>\n<h3><code>copyOf()<\/code> \u65b9\u6cd5<\/h3>\n<p>\u5f53\u60a8\u9700\u8981\u589e\u52a0\u6216\u51cf\u5c11\u6570\u7ec4\u5927\u5c0f\u65f6\uff0c<code>copyOf()<\/code> \u65b9\u6cd5\u4f1a\u5c06\u7ed9\u5b9a\u6570\u7ec4\u590d\u5236\u5230\u4e00\u4e2a\u65b0\u6570\u7ec4\u4e2d\u3002\u7531\u4e8e\u6570\u7ec4\u7684\u957f\u5ea6\u5728\u521b\u5efa\u540e\u65e0\u6cd5\u66f4\u6539\uff0c\u56e0\u6b64\u60a8\u53ef\u4ee5\u4f7f\u7528\u6b64\u65b9\u6cd5\u521b\u5efa\u4e00\u4e2a\u5177\u6709\u6240\u9700\u5927\u5c0f\u7684\u65b0\u6570\u7ec4\uff0c\u5176\u4e2d\u5305\u542b\u4ece\u65e7\u6570\u7ec4\u590d\u5236\u7684\u5185\u5bb9\u3002<\/p>\n<p>\u4f8b\u5982\uff0c<code>password<\/code> \u6570\u7ec4\u53ea\u80fd\u5b58\u50a8\u516d\u4e2a\u5143\u7d20\uff0c\u8fd9\u4e0d\u9002\u5408\u5f53\u4eca\u7684\u5b89\u5168\u8981\u6c42\u3002\u8981\u589e\u52a0\u5176\u5927\u5c0f\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 <code>copyOf()<\/code> \u521b\u5efa\u4e00\u4e2a\u66f4\u5927\u7684\u65b0\u6570\u7ec4\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<ol>\n<li data-prefix=\"jshell&gt;\">password = Arrays.copyOf(password, 10);<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>\u5728\u524d\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u60a8\u5c06 <code>password<\/code> \u7684\u503c\u91cd\u65b0\u5206\u914d\u7ed9\u4e00\u4e2a\u65b0\u6570\u7ec4\u3002\u8fd9\u4e2a\u65b0\u6570\u7ec4\u662f\u5c06\u65e7\u7684 <code>password<\/code> \u6570\u7ec4\u590d\u5236\u5230\u4e00\u4e2a\u957f\u5ea6\u4e3a 10 \u4e2a\u5143\u7d20\u7684\u65b0\u6570\u7ec4\u7684\u7ed3\u679c\u3002\u4e3a\u4e86\u590d\u5236\u5b83\uff0c\u60a8\u4f7f\u7528\u4e86 <code>Arrays.copyOf()<\/code> \u65b9\u6cd5\uff0c\u8be5\u65b9\u6cd5\u63a5\u53d7\u4e24\u4e2a\u53c2\u6570\u3002\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u60a8\u8981\u4ece\u4e2d\u590d\u5236\u7684\u6570\u7ec4\u3002\u7b2c\u4e8c\u4e2a\u53c2\u6570\u662f\u60a8\u6b63\u5728\u521b\u5efa\u7684\u65b0\u6570\u7ec4\u7684\u957f\u5ea6\u3002<\/p>\n<p>\u5f53\u60a8\u5728 jshell \u4e2d\u8fd0\u884c\u524d\u9762\u7684\u4ee3\u7801\u65f6\uff0c\u60a8\u5c06\u83b7\u5f97\u7c7b\u4f3c\u4ee5\u4e0b\u7684\u8f93\u51fa\uff1a<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<div class=\"secondary-code-label\" title=\"Output\">\u8f93\u51fa<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>password ==&gt; char[10] { &#8216;c&#8217;, &#8216;e&#8217;, &#8216;e&#8217;, &#8216;r&#8217;, &#8216;s&#8217;, &#8216;t&#8217;, &#8216;\\000&#8217;, &#8216;\\000&#8217;, &#8216;\\000&#8217;, &#8216;\\000&#8217; }<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<\/div>\n<p>\u4e0a\u9762\u4e00\u884c\u663e\u793a <code>password<\/code> \u6570\u7ec4\u73b0\u5728\u6709 10 \u4e2a\u5143\u7d20\u3002\u524d\u516d\u4e2a\u5143\u7d20\u6765\u81ea\u539f\u59cb\u7684 <code>password<\/code> \u6570\u7ec4\uff0c\u5728\u6309\u5b57\u6bcd\u6392\u5e8f\u540e\uff0c\u5b83\u4eec\u53d8\u6210\u4e86 &#8216;c&#8217;, &#8216;e&#8217;, &#8216;e&#8217;, &#8216;r&#8217;, &#8216;s&#8217;, &#8216;t&#8217;\u3002\u6700\u540e\u56db\u4e2a\u503c\u662f\u7a7a\u7684\uff0c\u56e0\u4e3a <code>Arrays.copyOf()<\/code> \u5728\u589e\u52a0\u5143\u7d20\u6570\u91cf\u65f6\u4f1a\u7528\u7a7a\u503c\u586b\u5145\u65b0\u5143\u7d20\u3002<\/p>\n<p>\u60a8\u8fd8\u53ef\u4ee5\u901a\u8fc7\u68c0\u67e5\u6bcf\u4e2a\u6570\u7ec4\u5bf9\u8c61\u90fd\u5177\u6709\u7684 <code>length<\/code> \u5c5e\u6027\u6765\u9a8c\u8bc1\u65b0\u6570\u7ec4\u662f\u5426\u5305\u542b 10 \u4e2a\u5143\u7d20\u3002\u60a8\u53ef\u4ee5\u6309\u5e38\u89c4\u65b9\u5f0f\u6253\u5370\u6b64\u503c\uff1a<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<ol>\n<li data-prefix=\"jshell&gt;\">System.out.println(password.length);<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>\u5728\u8fd9\u91cc\uff0c\u60a8\u4f7f\u7528 <code>println()<\/code> \u65b9\u6cd5\u5e76\u5c06 <code>password.length<\/code> \u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u3002jshell \u7684\u8f93\u51fa\u5c06\u662f\uff1a<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<div class=\"secondary-code-label\" title=\"Output\">\u8f93\u51fa<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<p>10<\/p>\n<pre class=\"post-pre\"><code><\/code><\/pre>\n<\/div>\n<p>\u672c\u8282\u4ecb\u7ecd\u7684\u65b9\u6cd5\u662f\u4e0e\u6570\u7ec4\u76f8\u5173\u7684\u4e00\u4e9b\u6700\u6709\u7528\u7684\u65b9\u6cd5\u3002\u60a8\u53ef\u4ee5\u6839\u636e\u5b98\u65b9\u7684 <code>Arrays<\/code> \u6587\u6863\uff0c\u8fdb\u4e00\u6b65\u63a2\u7d22 <code>Arrays<\/code> \u7c7b\u4e2d\u7684\u5404\u79cd\u65b9\u6cd5\u3002<\/p>\n<h2>\u603b\u7ed3<\/h2>\n<p>\u5728\u672c\u6559\u7a0b\u4e2d\uff0c\u60a8\u4f7f\u7528 Java \u6570\u7ec4\u5bf9\u76f8\u5173\u9879\u8fdb\u884c\u5206\u7ec4\u3002\u60a8\u5b66\u4e60\u4e86\u5982\u4f55\u521b\u5efa\u6570\u7ec4\u3001\u5982\u4f55\u67e5\u770b\u5b83\u4eec\u4ee5\u53ca\u5982\u4f55\u4f7f\u7528\u5176\u5185\u5bb9\u3002\u60a8\u8fd8\u5b66\u4e60\u4e86\u4f7f\u7528\u6570\u7ec4\u7684\u6700\u4f73\u5b9e\u8df5\u548c\u6709\u7528\u65b9\u6cd5\u3002<\/p>\n<p>\u6709\u5173 Java \u7684\u66f4\u591a\u5185\u5bb9\uff0c\u8bf7\u67e5\u770b\u6211\u4eec\u7684\u300aJava \u7f16\u7a0b\u7cfb\u5217\u6559\u7a0b\u300b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7b80\u4ecb \u6570\u7ec4\u5141\u8bb8\u60a8\u5c06\u591a\u4e2a\u5143\u7d20\u5206\u7ec4\u548c\u5b58\u50a8\u3002\u4f7f\u7528\u6570\u7ec4\uff0c\u60a8\u53ef\u4ee5\u5b58\u50a8\u4efb\u4f55\u7c7b\u578b\u7684\u6570\u636e\uff0c\u5305\u62ec\u5f15\u7528\u7c7b\u578b\u6216\u539f\u59cb\u7c7b\u578b\u3002\u7136\u800c\uff0c\u6240\u6709\u7684 [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[183,250,180,252,251],"class_list":{"0":"post-18","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"hentry","6":"category-uncategorized","7":"tag-java","10":"tag-252","11":"tag-251"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ 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