{"id":266,"date":"2020-02-05T19:30:02","date_gmt":"2020-02-05T11:30:02","guid":{"rendered":"https:\/\/twocups.cn\/?p=266"},"modified":"2021-03-21T18:17:36","modified_gmt":"2021-03-21T10:17:36","slug":"19","status":"publish","type":"post","link":"https:\/\/twocups.cn\/index.php\/2020\/02\/05\/19\/","title":{"rendered":"\u3010Java\u3011String\u4e0e\u5404\u79cd\u6570\u636e\u7c7b\u578b\u4e4b\u95f4\u7684\u8f6c\u6362"},"content":{"rendered":"\n<h4><img width=\"80\" src=\"https:\/\/twocups.cn\/wp-content\/uploads\/2019\/12\/logo\u6a2a.png\" alt=\"\" class=\"wp-image-152\" srcset=\"https:\/\/twocups.cn\/wp-content\/uploads\/2019\/12\/logo\u6a2a.png 3337w, https:\/\/twocups.cn\/wp-content\/uploads\/2019\/12\/logo\u6a2a-300x125.png 300w, https:\/\/twocups.cn\/wp-content\/uploads\/2019\/12\/logo\u6a2a-1024x426.png 1024w, https:\/\/twocups.cn\/wp-content\/uploads\/2019\/12\/logo\u6a2a-768x320.png 768w, https:\/\/twocups.cn\/wp-content\/uploads\/2019\/12\/logo\u6a2a-1536x639.png 1536w, https:\/\/twocups.cn\/wp-content\/uploads\/2019\/12\/logo\u6a2a-2048x852.png 2048w\" sizes=\"(max-width: 3337px) 100vw, 3337px\" \/>\u7248\u6743\u58f0\u660e\uff1a\u672c\u6587\u4e3a\u535a\u4e3b\u539f\u521b\u6587\u7ae0\uff0c\u8f6c\u8f7d\u8bf7\u6ce8\u660e\u51fa\u5904\uff1a<a href=\"https:\/\/twocups.cn\/index.php\/2020\/02\/05\/19\/\">https:\/\/twocups.cn\/index.php\/2020\/02\/05\/19\/<\/a><\/h4>\n\n\n\n<h2>String \u4e0e int \uff08byte\u3001short\u3001long\u3001float\u3001doule \u540c\u7406\uff09<\/h2>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\" data-enlighter-theme=\"classic\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ String \u8f6c int\nString str = \"2020\";\nint num1 = Integer.parseInt(str);\nint num2 = Integer.valueOf(str).intValue();\n\n\/\/ int \u8f6c String\nint num = 2020;\nString str1 = num + \"\";\nString str2 = Integer.toString(num);\nString str3 = String.valueOf(num);<\/pre>\n\n\n\n<p>int \u8f6c String \u5927\u5bb6\u597d\u7406\u89e3\uff0c\u4f46 String \u8f6c int \u4e0d\u4f1a\u51fa\u95ee\u9898\u5417\uff1f\u6bd4\u5982 String \u662f \u201cabc\u201d\u8fd9\u79cd\u60c5\u51b5\uff0c\u8f6c\u6362\u6210 int \u540e\u4f1a\u53d8\u6210\u4ec0\u4e48\u6837\uff1f<\/p>\n\n\n\n<p>\u5f53\u7136\u6709\u53ef\u80fd\u51fa\u95ee\u9898\u3002Integer.parseInt(str) \u5728\u9047\u5230\u4ee5\u4e0b\u4e09\u79cd\u60c5\u51b5\u65f6\u4f1a\u629b\u51fa\u5f02\u5e38 NumberFormatException\uff1a<\/p>\n\n\n\n<p>1. String \u5185\u5bb9\u4e0d\u662f\u6570\u5b57\u65f6\uff0c\u4f8b\u5982\u5b57\u6bcd\u3001\u7b26\u53f7\u3002<\/p>\n\n\n\n<p>2. String \u5185\u5bb9\u4e3a\u7a7a\u65f6\u3002<\/p>\n\n\n\n<p>3. String \u5185\u5bb9\u8d85\u51fa int \u4e0a\u9650\u65f6\u3002<\/p>\n\n\n\n<h2>String \u4e0e StringBuilder\u3001StringBuffer<\/h2>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\" data-enlighter-theme=\"classic\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ String \u8f6c StringBuilder\u3001StringBuffer\nString str = \"Twocups\";\nStringBuilder sBuilder = new StringBuilder(str);\nStringBuffer sBuffer = new StringBuffer(str);\nsBuilder.append(str);\nsBuffer.append(str);\n\n\/\/ StringBuilder\u3001StringBuffer \u8f6c String\nString str1 = sBuilder.toString();\nString str2 = sBuffer.toString();\n<\/pre>\n\n\n\n<h2>String \u4e0e String \u6570\u7ec4\u3001String \u96c6\u5408<\/h2>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\" data-enlighter-theme=\"classic\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ String \u8f6c String \u6570\u7ec4\nString str = \"aa,bb,cc\";\nString[] strArray = str.split(\",\");\n\n\/\/ String \u8f6c String\u96c6\u5408\nString str1 = \"Two\";\nString str2 = \"cups\";\nString str3 = \".cn\";\nList&lt;String> strList = Arrays.asList(str1, str2, str3);<\/pre>\n\n\n\n<h2>String \u4e0e char \u6570\u7ec4<\/h2>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\" data-enlighter-theme=\"classic\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ String \u8f6c char \u6570\u7ec4\nString str = \"Twocups\";\nchar[] c = str.toCharArray();\n\n\/\/ char \u6570\u7ec4 \u8f6c String\nString str1 = String.copyValueOf(c);\nString str2 = Arrays.toString(c);<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u7248\u6743\u58f0\u660e\uff1a\u672c\u6587\u4e3a\u535a\u4e3b\u539f\u521b\u6587\u7ae0\uff0c\u8f6c\u8f7d\u8bf7\u6ce8\u660e\u51fa\u5904\uff1ahttps:\/\/twocups.cn\/index.php\/202 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":220,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[80],"tags":[32,87,86],"_links":{"self":[{"href":"https:\/\/twocups.cn\/index.php\/wp-json\/wp\/v2\/posts\/266"}],"collection":[{"href":"https:\/\/twocups.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/twocups.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/twocups.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/twocups.cn\/index.php\/wp-json\/wp\/v2\/comments?post=266"}],"version-history":[{"count":0,"href":"https:\/\/twocups.cn\/index.php\/wp-json\/wp\/v2\/posts\/266\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/twocups.cn\/index.php\/wp-json\/wp\/v2\/media\/220"}],"wp:attachment":[{"href":"https:\/\/twocups.cn\/index.php\/wp-json\/wp\/v2\/media?parent=266"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/twocups.cn\/index.php\/wp-json\/wp\/v2\/categories?post=266"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/twocups.cn\/index.php\/wp-json\/wp\/v2\/tags?post=266"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}