{"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_tw\/\u90e8\u843d\u683c\/java\/java\u5b57\u4e32","title":{"rendered":"Java \u4e2d\u7684\u57fa\u672c\u5b57\u7b26\u4e32\u64cd\u4f5c\u6458\u8981\u3002"},"content":{"rendered":"<h2>\u5206\u5272\u5b57\u4e32 \u2013 <strong>\u5206\u88c2<\/strong><\/h2>\n<p>\u5728\u7279\u5b9a\u5b57\u4e32\uff08\u5206\u9694\u7b26\u865f\uff09\u8655\u62c6\u5206\u5b57\u4e32\u3002<\/p>\n<h4>\u7bc4\u4f8b\u7a0b\u5f0f\u78bc<\/h4>\n<pre class=\"sample_src\">\r\npublic static void splitSample() { String line = &quot;\u860b\u679c\u3001\u67f3\u6a59\u3001\u9999\u8549&quot;; String[]fruits = line.split(&quot;,&quot;); for (Stringfruit:fruits) { System.out.println(fruit); } }\r\n<\/pre>\n<p>\u8f38\u51fa\u7d50\u679c\uff1a<\/p>\n<pre class=\"console\">\r\n\u860b\u679c \u67f3\u6a59 \u9999\u8549\r\n<\/pre>\n<h2>\u57fa\u672c\u5b57\u4e32\u9023\u63a5<\/h2>\n<p>\u60a8\u53ef\u4ee5\u4f7f\u7528\u201c+\u201d\u904b\u7b97\u7b26\u7d44\u5408\u5b57\u4e32\u3002<\/p>\n<h4>\u7bc4\u4f8b\u7a0b\u5f0f\u78bc<\/h4>\n<pre class=\"sample_src\">\r\npublic static void plusSample() { String s1 = &quot;hello &quot;; String s2 = &quot;world!&quot;; System.out.println(s1 + s2); }\r\n<\/pre>\n<p>\u8f38\u51fa\u7d50\u679c\uff1a<\/p>\n<pre class=\"console\">\r\n\u4f60\u597d\u4e16\u754c\uff01\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>\u7528\u5206\u9694\u7b26\u865f\u9023\u63a5\u5b57\u4e32 \u2013 <strong>\u52a0\u5165<\/strong><\/h2>\n<p>\u4f7f\u7528\u7279\u5b9a\u5b57\u4e32\uff08\u5206\u9694\u7b26\u865f\uff09\u9023\u63a5\u5b57\u4e32\uff08\u81ea Java 8 \u8d77\u53ef\u7528\uff09<\/p>\n<h4>\u7bc4\u4f8b\u7a0b\u5f0f\u78bc<\/h4>\n<pre class=\"sample_src\">\r\npublic static void joinSample() { String line = String.join(&quot;,&quot;, &quot;\u860b\u679c&quot;, &quot;\u67f3\u6a59&quot;, &quot;\u9999\u8549&quot;); System.out.println(line); }\r\n<\/pre>\n<p>join \u53ef\u7528\u65bc\u4ee5\u76f8\u540c\u7684\u65b9\u5f0f\u9023\u63a5\u5b57\u4e32\u9663\u5217\u3002<\/p>\n<pre class=\"sample_src\">\r\npublic static void joinArraySample() { String[]fruits = {\u201c\u860b\u679c\u201d\uff0c\u201c\u6a58\u5b50\u201d\uff0c\u201c\u9999\u8549\u201d}; String line = String.join(\u201c\uff0c\u201d\uff0cfruits); System.out.println(line); \/ \/\u7d50\u679c\u662f\u4e00\u6a23\u7684}\r\n<\/pre>\n<p>\u8f38\u51fa\u7d50\u679c\uff1a<\/p>\n<pre class=\"console\">\r\n\u860b\u679c\u3001\u67f3\u6a59\u3001\u9999\u8549\r\n<\/pre>\n<h2>\u63d0\u53d6\u6307\u5b9a\u7bc4\u570d\u7684\u5b57\u4e32 \u2013 <strong>\u5b50\u5b57\u4e32<\/strong><\/h2>\n<p>\u900f\u904e\u6307\u5b9a\u8d77\u9ede\u548c\u7d42\u9ede\u4f86\u63d0\u53d6\u5b57\u4e32\u7684\u4e00\u90e8\u5206\u3002<\/p>\n<h4>\u7bc4\u4f8b\u7a0b\u5f0f\u78bc<\/h4>\n<pre class=\"sample_src\">\r\npublic static void substringSample() { String str = &quot;hello world!&quot;; System.out.println(str.substring(0, 5)); System.out.println(str.substring(2, 9)); System. out.println(str.substring(6)); \/\/\u4e5f\u53ef\u4ee5\u53ea\u6307\u5b9a\u8d77\u9ede}\r\n<\/pre>\n<p>\u8f38\u51fa\u7d50\u679c\uff1a<\/p>\n<pre class=\"console\">\r\n\u4f60\u597d\uff0c\u4e16\u754c\uff01\r\n<\/pre>\n<h2>\u522a\u9664\u524d\u5c0e\u548c\u5c3e\u96a8\u7a7a\u683c \u2013 <strong>\u4fee\u526a<\/strong><\/h2>\n<p>\u522a\u9664\u5b57\u4e32\u524d\u5f8c\u7684\u534a\u89d2\u7a7a\u683c\u3001\u63db\u884c\u7b26\u548c\u88fd\u8868\u7b26\u3002<br \/>\n\u5b57\u4e32\u4e2d\u9593\u7684\u7a7a\u683c\u548c\u96d9\u4f4d\u5143\u7d44\u7a7a\u683c\u4e0d\u6703\u88ab\u522a\u9664\u3002<\/p>\n<h4>\u7bc4\u4f8b\u7a0b\u5f0f\u78bc<\/h4>\n<pre class=\"sample_src\">\r\n\u516c\u5171\u975c\u614b\u7121\u6548\u4fee\u526a\u6a23\u672c\uff08\uff09{\u5b57\u4e32str =\u201c\u4f60\u597d\u4e16\u754c\uff01\u201d; System.out.println\uff08str.trim\uff08\uff09\uff09; }\r\n<\/pre>\n<p>\u8f38\u51fa\u7d50\u679c\uff1a<\/p>\n<pre class=\"console\">\r\n\u4f60\u597d\u4e16\u754c\uff01\r\n<\/pre>\n<h2>\u5c07\u5b57\u4e32\u7684\u4e00\u90e8\u5206\u66ff\u63db\u70ba\u53e6\u4e00\u500b\u5b57\u4e32 \u2013 <strong>\u4ee3\u66ff<\/strong><\/h2>\n<p>\u5c07\u5b57\u4e32\u7684\u4e00\u90e8\u5206\u66ff\u63db\u70ba\u6307\u5b9a\u5b57\u4e32\u3002\u66ff\u63db\u66ff\u63db\u6240\u6709\u5339\u914d\u7684\u5b57\u4e32\u3002<\/p>\n<h4>\u7bc4\u4f8b\u7a0b\u5f0f\u78bc<\/h4>\n<pre class=\"sample_src\">\r\npublic static void ReplaceSample() { String str = &quot;hello world!&quot;; System.out.println(str.replace(&quot;l&quot;, &quot;\u00d7&quot;)); }\r\n<\/pre>\n<p>\u8f38\u51fa\u7d50\u679c\uff1a<\/p>\n<pre class=\"console\">\r\n\u4ed6\u00d7\u00d7o\u4e16\u754c\u00d7d\uff01\r\n<\/pre>\n<p>ReplaceFirst \u50c5\u53d6\u4ee3\u7b2c\u4e00\u500b\u7b26\u5408\u7684\u5b57\u4e32\u3002<\/p>\n<h4>\u7bc4\u4f8b\u7a0b\u5f0f\u78bc<\/h4>\n<pre class=\"sample_src\">\r\npublic static void ReplaceFirstSample() { String str = &quot;hello world!&quot;; System.out.println(str.replaceFirst(&quot;l&quot;, &quot;\u00d7&quot;)); }\r\n<\/pre>\n<p>\u8f38\u51fa\u7d50\u679c\uff1a<\/p>\n<pre class=\"console\">\r\n\u4ed6\u00d7\u77a7\u4e16\u754c\uff01\r\n<\/pre>\n<h2>\u50b3\u56de\u5b57\u4e32\u4e2d\u7684\u5b57\u5143\u6578 \u2013 <strong>\u9577\u5ea6<\/strong><\/h2>\n<p>\u50b3\u56de\u5b57\u4e32\u4e2d\u7684\u5b57\u5143\u6578\u3002 String.length() \u50c5\u50b3\u56de\u5b57\u5143\u6578\u3002<\/p>\n<h4>\u7bc4\u4f8b\u7a0b\u5f0f\u78bc<\/h4>\n<pre class=\"sample_src\">\r\npublic static void lengthSample() { String str = &quot;\u3007\u3007\u7e23\u25a1\u25a1\u5e02\u25b3\u25b3\u93ae10-11&quot;; System.out.println(str.length()); }\r\n<\/pre>\n<p>\u8f38\u51fa\u7d50\u679c\uff1a<\/p>\n<pre class=\"console\">\r\n14\r\n<\/pre>\n<p>\u5982\u679c\u60a8\u60f3\u77e5\u9053\u4f4d\u5143\u7d44\u6578\uff0c\u8acb\u4f7f\u7528 String.getBytes().length\u3002\u5f9eJava8\u958b\u59cb\uff0c\u6a19\u6e96\u5b57\u5143\u7de8\u78bc\u70baUTF8\uff0c\u56e0\u6b64\u6bcf\u500b\u5168\u89d2\u5b57\u5143\u70ba3\u500b\u4f4d\u5143\u7d44\u3002<\/p>\n<h4>\u7bc4\u4f8b\u7a0b\u5f0f\u78bc<\/h4>\n<pre class=\"sample_src\">\r\npublic static void byteLengthSample() { String str = &quot;\u3007\u3007\u7e23\u25a1\u25a1\u5e02\u25b3\u25b3\u93ae10-11&quot;; System.out.println(str.getBytes().length); }\r\n<\/pre>\n<p>\u8f38\u51fa\u7d50\u679c\uff1a<\/p>\n<pre class=\"console\">\r\n32\r\n<\/pre>","protected":false},"excerpt":{"rendered":"<p>\u5206\u5272\u5b57\u4e32 \u2013 split \u5728\u7279\u5b9a\u5b57\u4e32\uff08\u5206\u9694\u7b26\u865f\uff09\u8655\u5206\u5272\u5b57\u4e32\u3002\u7bc4\u4f8b\u7a0b\u5f0f\u78bc [...]<\/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_tw\/wp-json\/wp\/v2\/posts\/4617"}],"collection":[{"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/comments?post=4617"}],"version-history":[{"count":8,"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/posts\/4617\/revisions"}],"predecessor-version":[{"id":4628,"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/posts\/4617\/revisions\/4628"}],"wp:attachment":[{"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/media?parent=4617"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/categories?post=4617"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/tags?post=4617"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}