{"id":40107,"date":"2024-11-26T09:57:03","date_gmt":"2024-11-26T01:57:03","guid":{"rendered":"https:\/\/fwq.ai\/blog\/40107\/"},"modified":"2024-11-26T09:57:03","modified_gmt":"2024-11-26T01:57:03","slug":"java%e4%b8%ad%e6%80%8e%e4%b9%88%e6%8a%8a%e5%ad%97%e7%ac%a6%e4%b8%b2%e8%b5%8b%e7%bb%99%e6%95%b0%e7%bb%84","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/40107\/","title":{"rendered":"Java\u4e2d\u600e\u4e48\u628a\u5b57\u7b26\u4e32\u8d4b\u7ed9\u6570\u7ec4"},"content":{"rendered":"<blockquote><p>\n  \u5728 java \u4e2d\uff0c\u5c06\u5b57\u7b26\u4e32\u8d4b\u7ed9\u6570\u7ec4\u7684\u65b9\u6cd5\u5305\u62ec\uff1a\u58f0\u660e\u5e76\u521d\u59cb\u5316\u6570\u7ec4\u4f7f\u7528\u6570\u7ec4\u7d22\u5f15\u8d4b\u503c\u4f7f\u7528\u6570\u7ec4\u5faa\u73af\u8d4b\u503c\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/17\/2024111720192282450.jpg\" class=\"aligncenter\" title=\"Java\u4e2d\u600e\u4e48\u628a\u5b57\u7b26\u4e32\u8d4b\u7ed9\u6570\u7ec4\u63d2\u56fe\" alt=\"Java\u4e2d\u600e\u4e48\u628a\u5b57\u7b26\u4e32\u8d4b\u7ed9\u6570\u7ec4\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u5728 Java \u4e2d\u5c06\u5b57\u7b26\u4e32\u8d4b\u7ed9\u6570\u7ec4<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u6570\u7ec4\u662f\u7528\u4e8e\u5b58\u50a8\u76f8\u540c\u6570\u636e\u7c7b\u578b\u7684\u5143\u7d20\u7684\u56fa\u5b9a\u5927\u5c0f\u7684\u5bb9\u5668\u3002\u8981\u5c06\u5b57\u7b26\u4e32\u8d4b\u7ed9\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a<\/p>\n<p><strong>1. \u58f0\u660e\u548c\u521d\u59cb\u5316\u6570\u7ec4<\/strong><\/p>\n<pre>String[] countries = {\"\u5370\u5ea6\", \"\u4e2d\u56fd\", \"\u7f8e\u56fd\", \"\u4fc4\u7f57\u65af\"};<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u58f0\u660e\u4e86\u4e00\u4e2a\u540d\u4e3a countries \u7684\uff0c\u5e76\u521d\u59cb\u5316\u5176\u5143\u7d20\u3002<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<p><strong>2. \u4f7f\u7528\u6570\u7ec4\u8d4b\u503c<\/strong><\/p>\n<p>\u8981\u5c06\u5355\u4e2a\u5b57\u7b26\u4e32\u8d4b\u7ed9\u6570\u7ec4\u4e2d\u7684\u7279\u5b9a\u5143\u7d20\uff0c\u8bf7\u4f7f\u7528\u6570\u7ec4\u7d22\u5f15\uff1a<\/p>\n<pre>countries[2] = \"\u5df4\u897f\";<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4e0a\u9762\u7684\u4ee3\u7801\u4f1a\u5c06\u5b57\u7b26\u4e32 &#8220;\u5df4\u897f&#8221; \u8d4b\u7ed9\u6570\u7ec4 countries \u4e2d\u7684\u7b2c\u4e09\u4e2a\u5143\u7d20\u3002<\/p>\n<p><strong>3. \u4f7f\u7528\u6570\u7ec4\u5faa\u73af<\/strong><\/p>\n<p>\u8981\u904d\u5386\u5e76\u5411\u6570\u7ec4\u4e2d\u7684\u6240\u6709\u5143\u7d20\u8d4b\u503c\uff0c\u53ef\u4ee5\u4f7f\u7528 for-each \u5faa\u73af\u6216\u6807\u51c6 for \u5faa\u73af\uff1a<\/p>\n<p><strong>\u4f7f\u7528 for-each \u5faa\u73af\uff1a<\/strong><\/p>\n<pre>for (String country : countries) {\n  country = country.toUpperCase();\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4e0a\u9762\u7684\u4ee3\u7801\u4f1a\u5c06\u6570\u7ec4\u4e2d\u7684\u6240\u6709\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5927\u5199\u3002<\/p>\n<p><strong>\u4f7f\u7528\u6807\u51c6 for \u5faa\u73af\uff1a<\/strong><\/p>\n<pre>for (int i = 0; i &lt; countries.length; i++) {\n  countries[i] = countries[i].toLowerCase();\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4e0a\u9762\u7684\u4ee3\u7801\u4f1a\u5c06\u6570\u7ec4\u4e2d\u7684\u6240\u6709\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5c0f\u5199\u3002<\/p>\n<p><strong>\u6ce8\u610f\uff1a<\/strong><\/p>\n<ul>\n<li>Java \u6570\u7ec4\u5927\u5c0f\u662f\u56fa\u5b9a\u7684\uff0c\u4e00\u65e6\u521b\u5efa\u5c31\u65e0\u6cd5\u66f4\u6539\u3002<\/li>\n<li>\u6570\u7ec4\u5143\u7d20\u7684\u7d22\u5f15\u4ece 0 \u5f00\u59cb\u3002<\/li>\n<li>\u5c1d\u8bd5\u8bbf\u95ee\u8d85\u51fa\u6570\u7ec4\u8303\u56f4\u7684\u5143\u7d20\u4f1a\u5bfc\u81f4 IndexOutOfBoundsException\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fJava\u4e2d\u600e\u4e48\u628a\u5b57\u7b26\u4e32\u8d4b\u7ed9\u6570\u7ec4\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 java \u4e2d\uff0c\u5c06\u5b57\u7b26\u4e32\u8d4b\u7ed9\u6570\u7ec4\u7684\u65b9\u6cd5\u5305\u62ec\uff1a\u58f0\u660e\u5e76\u521d\u59cb\u5316\u6570\u7ec4\u4f7f\u7528\u6570\u7ec4\u7d22\u5f15\u8d4b\u503c\u4f7f\u7528\u6570\u7ec4\u5faa\u73af\u8d4b\u503c \u5982\u4f55\u5728 Java \u4e2d\u5c06\u5b57\u7b26\u4e32\u8d4b\u7ed9\u6570\u7ec4 \u5728 Java \u4e2d\uff0c\u6570\u7ec4\u662f\u7528\u4e8e\u5b58\u50a8\u76f8\u540c\u6570\u636e\u7c7b\u578b\u7684\u5143\u7d20\u7684\u56fa\u5b9a\u5927\u5c0f\u7684\u5bb9\u5668\u3002\u8981\u5c06\u5b57\u7b26\u4e32\u8d4b\u7ed9\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a 1. \u58f0\u660e\u548c\u521d\u59cb\u5316\u6570\u7ec4 String[] countries = {&#8220;\u5370\u5ea6&#8221;, &#8220;\u4e2d\u56fd&#8221;, &#8220;\u7f8e\u56fd&#8221;, &#8220;\u4fc4\u7f57\u65af&#8221;}; \u767b\u5f55\u540e\u590d\u5236 \u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u58f0\u660e\u4e86\u4e00\u4e2a\u540d\u4e3a countries \u7684\uff0c\u5e76\u521d\u59cb\u5316\u5176\u5143\u7d20\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b 2. \u4f7f\u7528\u6570\u7ec4\u8d4b\u503c \u8981\u5c06\u5355\u4e2a\u5b57\u7b26\u4e32\u8d4b\u7ed9\u6570\u7ec4\u4e2d\u7684\u7279\u5b9a\u5143\u7d20\uff0c\u8bf7\u4f7f\u7528\u6570\u7ec4\u7d22\u5f15\uff1a countries[2] = &#8220;\u5df4\u897f&#8221;; \u767b\u5f55\u540e\u590d\u5236 \u4e0a\u9762\u7684\u4ee3\u7801\u4f1a\u5c06\u5b57\u7b26\u4e32 &#8220;\u5df4\u897f&#8221; \u8d4b\u7ed9\u6570\u7ec4 countries \u4e2d\u7684\u7b2c\u4e09\u4e2a\u5143\u7d20\u3002 3. \u4f7f\u7528\u6570\u7ec4\u5faa\u73af \u8981\u904d\u5386\u5e76\u5411\u6570\u7ec4\u4e2d\u7684\u6240\u6709\u5143\u7d20\u8d4b\u503c\uff0c\u53ef\u4ee5\u4f7f\u7528 for-each \u5faa\u73af\u6216\u6807\u51c6 for \u5faa\u73af\uff1a \u4f7f\u7528 for-each \u5faa\u73af\uff1a for (String country : countries) { country = country.toUpperCase(); } [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-40107","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/40107","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=40107"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/40107\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=40107"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=40107"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=40107"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}