{"id":36935,"date":"2024-11-26T16:30:41","date_gmt":"2024-11-26T08:30:41","guid":{"rendered":"https:\/\/fwq.ai\/blog\/36935\/"},"modified":"2024-11-26T16:30:41","modified_gmt":"2024-11-26T08:30:41","slug":"%e6%80%8e%e4%b9%88%e5%88%9b%e5%bb%bastring%e6%95%b0%e7%bb%84-java","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/36935\/","title":{"rendered":"\u600e\u4e48\u521b\u5efastring\u6570\u7ec4 java"},"content":{"rendered":"<blockquote><p>\n  java \u4e2d\u521b\u5efa string \u6570\u7ec4\u7684\u4e24\u79cd\u65b9\u6cd5\uff1a\u957f\u5ea6\u5df2\u77e5\uff1a\u4f7f\u7528 new \u521b\u5efa\u6307\u5b9a\u957f\u5ea6\u7684\u6570\u7ec4\uff0c\u5143\u7d20\u521d\u59cb\u4e3a null\u3002\u957f\u5ea6\u672a\u77e5\uff1a\u4f7f\u7528 arraylist \u5b58\u50a8\u503c\uff0c\u7136\u540e\u8f6c\u6362\u4e3a\u6570\u7ec4\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/12\/2024111221545482412.jpg\" class=\"aligncenter\" title=\"\u600e\u4e48\u521b\u5efastring\u6570\u7ec4 java\u63d2\u56fe\" alt=\"\u600e\u4e48\u521b\u5efastring\u6570\u7ec4 java\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u521b\u5efa String \u6570\u7ec4<\/strong><\/p>\n<p><strong>\u7b80\u4ecb<\/strong><\/p>\n<p>String \u6570\u7ec4\u7528\u4e8e\u5b58\u50a8\u591a\u4e2a String \u503c\u3002\u5728 Java \u4e2d\uff0c\u521b\u5efa String \u6570\u7ec4\u6709\u4e24\u79cd\u4e3b\u8981\u65b9\u6cd5\u3002<\/p>\n<p><strong>1. \u957f\u5ea6\u5df2\u77e5\u7684\u6570\u7ec4<\/strong><\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<p>\u5982\u679c\u63d0\u524d\u77e5\u9053\u6570\u7ec4\u6240\u9700\u7684\u957f\u5ea6\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\u521b\u5efa\u5b83\uff1a<\/p>\n<pre>String[] names = new String[5];<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u8fd9\u5c06\u521b\u5efa\u4e00\u4e2a\u957f\u5ea6\u4e3a 5 \u7684 String \u6570\u7ec4\uff0c\u5176\u4e2d\u7684\u5143\u7d20\u6700\u521d\u4e3a null\u3002<\/p>\n<p><strong>2. \u957f\u5ea6\u672a\u77e5\u7684\u6570\u7ec4<\/strong><\/p>\n<p>\u5982\u679c\u4e0d\u77e5\u9053\u6570\u7ec4\u6240\u9700\u7684\u957f\u5ea6\uff0c\u53ef\u4ee5\u4f7f\u7528 ArrayList \u6765\u5b58\u50a8 String \u503c\uff0c\u7136\u540e\u5728\u9700\u8981\u65f6\u5c06\u5176\u8f6c\u6362\u4e3a String \u6570\u7ec4\uff1a<\/p>\n<pre>List&lt;String&gt; names = new ArrayList&lt;&gt;();\n\/\/ ... \u6dfb\u52a0\u5143\u7d20\u5230\u5217\u8868\u4e2d\nString[] array = names.toArray(new String[0]);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u8fd9\u5c06\u521b\u5efa\u4e00\u4e2a String \u6570\u7ec4\uff0c\u5176\u4e2d\u5305\u542b\u4e0e ArrayList \u4e2d\u76f8\u540c\u7684\u503c\u3002<\/p>\n<p><strong>\u793a\u4f8b<\/strong><\/p>\n<p>\u521b\u5efa\u4e00\u4e2a\u5305\u542b\u4e09\u4e2a String \u503c\u7684\u6570\u7ec4\uff1a<\/p>\n<pre>String[] colors = {\"Red\", \"Green\", \"Blue\"};<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u8bbf\u95ee\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\uff1a<\/p>\n<pre>System.out.println(colors[1]); \/\/ \u8f93\u51fa \"Green\"<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u6539\u53d8\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\uff1a<\/p>\n<pre>colors[2] = \"Purple\";<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u6ce8\u610f<\/strong><\/p>\n<ul>\n<li>String \u6570\u7ec4\u662f\u5bf9\u8c61\uff0c\u56e0\u6b64\u5b83\u4eec\u53ef\u4ee5\u88ab\u8d4b\u4e88 null \u503c\u3002<\/li>\n<li>String \u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u53ef\u4ee5\u662f\u4efb\u4f55 String \u503c\uff0c\u5305\u62ec null\u3002<\/li>\n<li>\u6570\u7ec4\u7684\u957f\u5ea6\u4e0d\u80fd\u6539\u53d8\u4e00\u65e6\u521b\u5efa\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662f\u600e\u4e48\u521b\u5efastring\u6570\u7ec4 java\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>java \u4e2d\u521b\u5efa string \u6570\u7ec4\u7684\u4e24\u79cd\u65b9\u6cd5\uff1a\u957f\u5ea6\u5df2\u77e5\uff1a\u4f7f\u7528 new \u521b\u5efa\u6307\u5b9a\u957f\u5ea6\u7684\u6570\u7ec4\uff0c\u5143\u7d20\u521d\u59cb\u4e3a null\u3002\u957f\u5ea6\u672a\u77e5\uff1a\u4f7f\u7528 arraylist \u5b58\u50a8\u503c\uff0c\u7136\u540e\u8f6c\u6362\u4e3a\u6570\u7ec4\u3002 \u5982\u4f55\u521b\u5efa String \u6570\u7ec4 \u7b80\u4ecb String \u6570\u7ec4\u7528\u4e8e\u5b58\u50a8\u591a\u4e2a String \u503c\u3002\u5728 Java \u4e2d\uff0c\u521b\u5efa String \u6570\u7ec4\u6709\u4e24\u79cd\u4e3b\u8981\u65b9\u6cd5\u3002 1. \u957f\u5ea6\u5df2\u77e5\u7684\u6570\u7ec4 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u5982\u679c\u63d0\u524d\u77e5\u9053\u6570\u7ec4\u6240\u9700\u7684\u957f\u5ea6\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\u521b\u5efa\u5b83\uff1a String[] names = new String[5]; \u767b\u5f55\u540e\u590d\u5236 \u8fd9\u5c06\u521b\u5efa\u4e00\u4e2a\u957f\u5ea6\u4e3a 5 \u7684 String \u6570\u7ec4\uff0c\u5176\u4e2d\u7684\u5143\u7d20\u6700\u521d\u4e3a null\u3002 2. \u957f\u5ea6\u672a\u77e5\u7684\u6570\u7ec4 \u5982\u679c\u4e0d\u77e5\u9053\u6570\u7ec4\u6240\u9700\u7684\u957f\u5ea6\uff0c\u53ef\u4ee5\u4f7f\u7528 ArrayList \u6765\u5b58\u50a8 String \u503c\uff0c\u7136\u540e\u5728\u9700\u8981\u65f6\u5c06\u5176\u8f6c\u6362\u4e3a String \u6570\u7ec4\uff1a List&lt;String&gt; names = new ArrayList&lt;&gt;(); \/\/ &#8230; \u6dfb\u52a0\u5143\u7d20\u5230\u5217\u8868\u4e2d String[] [&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-36935","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/36935","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=36935"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/36935\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=36935"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=36935"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=36935"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}