{"id":4617,"date":"2019-10-19T13:31:09","date_gmt":"2019-10-19T04:31:09","guid":{"rendered":"https:\/\/chat-messenger.com\/?p=4617"},"modified":"2019-10-19T13:43:05","modified_gmt":"2019-10-19T04:43:05","slug":"java-string","status":"publish","type":"post","link":"https:\/\/chat-messenger.com\/zh\/\u535a\u5ba2\/java\/java-\u5b57\u7b26\u4e32","title":{"rendered":"Java \u4e2d\u7684\u57fa\u672c\u5b57\u7b26\u4e32\u64cd\u4f5c\u6458\u8981\u3002"},"content":{"rendered":"<h2>\u5206\u5272\u5b57\u7b26\u4e32 -. <strong>(\u610f\u89c1) \u5206\u6b67<\/strong><\/h2>\n<p>\u5728\u7279\u5b9a\u5b57\u7b26\u4e32\uff08\u5206\u9694\u7b26\uff09\u5904\u5206\u5272\u5b57\u7b26\u4e32\u3002<\/p>\n<h4>\u793a\u4f8b\u4ee3\u7801<\/h4>\n<pre class=\"sample_src\">\r\npublic static void splitSample() {\r\n    String line = \"apple,mandarin orange,banana\"\uff1b\r\n    String[] fruits = line.split(\",\")\uff1b\r\n    for (String fruit : fruits) {\r\n        System.out.println(fruit)\uff1b\r\n    }\r\n}\r\n<\/pre>\n<p>\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<pre class=\"console\">\r\n\u82f9\u679c\r\n\u67d1\u6a58\r\n\u6cb9\u83dc\r\n<\/pre>\n<h2>\u57fa\u672c\u5b57\u7b26\u4e32\u5408\u5e76<\/h2>\n<p>\u5b57\u7b26\u4e32\u53ef\u4ee5\u4f7f\u7528 \"+\"\u8fd0\u7b97\u7b26\u8fdb\u884c\u7ec4\u5408\u3002<\/p>\n<h4>\u793a\u4f8b\u4ee3\u7801<\/h4>\n<pre class=\"sample_src\">\r\npublic static void plusSample() {\r\n    \u5b57\u7b26\u4e32 s1 = \"hello\"\uff1b\r\n    \u5b57\u7b26\u4e32 s2 = \"world!\r\n    System.out.println(s1 + s2)\uff1b\r\n}\r\n<\/pre>\n<p>\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<pre class=\"console\">\r\n\u4e16\u754c\u4f60\u597d\r\n<\/pre>\n<p><script type=\"text\/javascript\" src=\"https:\/\/chat-messenger.com\/js\/common.js?dd12sssas2223\" charset=\"UTF-8\"><\/script><br \/>\n<script type=\"text\/javascript\"> writePR(); <\/script><\/p>\n<h2>\u8fde\u63a5\u5e26\u5206\u9694\u7b26 - \u7684\u5b57\u7b26\u4e32\u3002 <strong>\u52a0\u5165<\/strong><\/h2>\n<p>\u5c06\u5b57\u7b26\u4e32\u4e0e\u7279\u5b9a\u5b57\u7b26\u4e32\uff08\u5206\u9694\u7b26\uff09\u7ec4\u5408\uff08\u9002\u7528\u4e8e java8 \u53ca\u66f4\u9ad8\u7248\u672c\uff09\u3002<\/p>\n<h4>\u793a\u4f8b\u4ee3\u7801<\/h4>\n<pre class=\"sample_src\">\r\npublic static void joinSample() {\r\n    String line = String.join(\",\", \"apple\", \"mandarin\", \"banana\")\uff1b\r\n    System.out.println(line)\uff1b\r\n}\r\n<\/pre>\n<p>\u4e0e\u5b57\u7b26\u4e32\u6570\u7ec4\u7684\u8fde\u63a5\u65b9\u5f0f\u76f8\u540c\u3002<\/p>\n<pre class=\"sample_src\">\r\npublic static void joinArraySample() {\r\n    String[] fruits = {\"\u82f9\u679c\"\u3001\"\u67d1\u6a58\"\u3001\"\u9999\u8549\"}\uff1b\r\n    String line = String.join(\",\"\", fruits)\uff1b\r\n    System.out.println(line); \/\/ \u7ed3\u679c\u76f8\u540c\r\n}\r\n<\/pre>\n<p>\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<pre class=\"console\">\r\n\u82f9\u679c\u3001\u6a58\u5b50\u3001\u9999\u8549\r\n<\/pre>\n<h2>\u4ece\u6307\u5b9a\u8303\u56f4\u5185\u526a\u5207\u51fa\u4e00\u4e2a\u5b57\u7b26\u4e32 -. <strong>\u5b50\u4e32<\/strong><\/h2>\n<p>\u901a\u8fc7\u6307\u5b9a\u526a\u5207\u7684\u8d77\u70b9\u548c\u7ec8\u70b9\uff0c\u526a\u5207\u51fa\u5b57\u7b26\u4e32\u7684\u4e00\u90e8\u5206\u3002<\/p>\n<h4>\u793a\u4f8b\u4ee3\u7801<\/h4>\n<pre class=\"sample_src\">\r\npublic static void substringSample() {\r\n    \u5b57\u7b26\u4e32 str = \"hello world!\r\n    System.out.println(str.substring(0, 5))\uff1b\r\n    System.out.println(str.substring(2, 9))\uff1b\r\n    System.out.println(str.substring(6)); \/\/\u53ea\u80fd\u6307\u5b9a\u8d77\u70b9\u3002\r\n}\r\n<\/pre>\n<p>\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<pre class=\"console\">\r\n\u4f60\u597d\r\n\u4e16\u754c\r\nworld\uff01\r\n<\/pre>\n<h2>\u5220\u9664\u524d\u9762\u548c\u540e\u9762\u7684\u7a7a\u683c -\u3002 <strong>\u5185\u9970<\/strong><\/h2>\n<p>\u5220\u9664\u5b57\u7b26\u4e32\u524d\u540e\u7684\u534a\u89d2\u7a7a\u683c\u3001\u6362\u884c\u7b26\u548c\u5236\u8868\u7b26\u3002<br \/>\n\u5b57\u7b26\u4e32\u4e2d\u95f4\u7684\u7a7a\u683c\u548c\u53cc\u5b57\u8282\u7a7a\u683c\u4e0d\u4f1a\u88ab\u5220\u9664\u3002<\/p>\n<h4>\u793a\u4f8b\u4ee3\u7801<\/h4>\n<pre class=\"sample_src\">\r\npublic static void trimSample() {\r\n    \u5b57\u7b26\u4e32 str = \" \u4f60\u597d\uff0c\u4e16\u754c\uff01\"\uff1b\r\n    System.out.println(str.trim())\uff1b\r\n}\r\n<\/pre>\n<p>\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<pre class=\"console\">\r\n\u4e16\u754c\u4f60\u597d\r\n<\/pre>\n<h2>\u7528\u53e6\u4e00\u4e2a\u5b57\u7b26\u4e32\u66ff\u6362\u90e8\u5206\u5b57\u7b26\u4e32 -. <strong>\u9876\u66ff<\/strong><\/h2>\n<p>\u7528\u6307\u5b9a\u5b57\u7b26\u4e32\u66ff\u6362\u90e8\u5206\u5b57\u7b26\u4e32\u3002<\/p>\n<h4>\u793a\u4f8b\u4ee3\u7801<\/h4>\n<pre class=\"sample_src\">\r\npublic static void replaceSample() {\r\n    \u5b57\u7b26\u4e32 str = \"hello world!\r\n    System.out.println(str.replace(\"l\", \"x\"))\uff1b\r\n}\r\n<\/pre>\n<p>\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<pre class=\"console\">\r\n\u4ed6 x x o wor xd\uff01\r\n<\/pre>\n<p>replaceFirst \u53ea\u66ff\u6362\u7b2c\u4e00\u4e2a\u5339\u914d\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n<h4>\u793a\u4f8b\u4ee3\u7801<\/h4>\n<pre class=\"sample_src\">\r\npublic static void replaceFirstSample() {\r\n    \u5b57\u7b26\u4e32 str = \"hello world!\r\n    System.out.println(str.replaceFirst(\"l\", \"x\"))\uff1b\r\n}\r\n<\/pre>\n<p>\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<pre class=\"console\">\r\n\u4ed6 x \u6d1b\u4e16\u754c\uff01\r\n<\/pre>\n<h2>\u8fd4\u56de\u5b57\u7b26\u4e32 - \u4e2d\u7684\u5b57\u7b26\u6570\u3002 <strong>\u957f\u5ea6<\/strong><\/h2>\n<p>\u8fd4\u56de\u5b57\u7b26\u4e32\u4e2d\u7684\u5b57\u7b26\u6570\uff1bString.length() \u53ea\u8fd4\u56de\u5b57\u7b26\u6570\u3002<\/p>\n<h4>\u793a\u4f8b\u4ee3\u7801<\/h4>\n<pre class=\"sample_src\">\r\npublic static void lengthSample() {\r\n    String str = \"10-11, \u25b3\u25b3-cho, \u25a1\u25a1 city, 00 prefecture\"\uff1b\r\n    System.out.println(str.length())\uff1b\r\n}\r\n<\/pre>\n<p>\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<pre class=\"console\">\r\n14\r\n<\/pre>\n<p>\u5982\u679c\u60f3\u77e5\u9053\u5b57\u8282\u6570\uff0c\u8bf7\u4f7f\u7528 String.getBytes().length\uff1bJava 8 \u7684\u5b57\u7b26\u7f16\u7801\u9ed8\u8ba4\u4e3a UTF8\uff0c\u56e0\u6b64\u6bcf\u4e2a\u53cc\u5b57\u8282\u5b57\u7b26\u6709 3 \u4e2a\u5b57\u8282\u3002<\/p>\n<h4>\u793a\u4f8b\u4ee3\u7801<\/h4>\n<pre class=\"sample_src\">\r\npublic static void byteLengthSample() {\r\n    String str = \"10-11, \u25b3\u25b3-cho, \u25a1\u25a1 city, 00 prefecture\"\uff1b\r\n    System.out.println(str.getBytes().length)\uff1b\r\n}\r\n<\/pre>\n<p>\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<pre class=\"console\">\r\n32\r\n<\/pre>","protected":false},"excerpt":{"rendered":"<p>\u5206\u5272\u5b57\u7b26\u4e32 \u2013 split \u5728\u7279\u5b9a\u5b57\u7b26\u4e32\uff08\u5206\u9694\u7b26\uff09\u5904\u5206\u5272\u5b57\u7b26\u4e32\u3002\u793a\u4f8b\u4ee3\u7801 [...]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"swell_btn_cv_data":""},"categories":[19],"tags":[],"_links":{"self":[{"href":"https:\/\/chat-messenger.com\/zh\/wp-json\/wp\/v2\/posts\/4617"}],"collection":[{"href":"https:\/\/chat-messenger.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/chat-messenger.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/chat-messenger.com\/zh\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/chat-messenger.com\/zh\/wp-json\/wp\/v2\/comments?post=4617"}],"version-history":[{"count":8,"href":"https:\/\/chat-messenger.com\/zh\/wp-json\/wp\/v2\/posts\/4617\/revisions"}],"predecessor-version":[{"id":4628,"href":"https:\/\/chat-messenger.com\/zh\/wp-json\/wp\/v2\/posts\/4617\/revisions\/4628"}],"wp:attachment":[{"href":"https:\/\/chat-messenger.com\/zh\/wp-json\/wp\/v2\/media?parent=4617"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/chat-messenger.com\/zh\/wp-json\/wp\/v2\/categories?post=4617"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/chat-messenger.com\/zh\/wp-json\/wp\/v2\/tags?post=4617"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}