{"id":4718,"date":"2019-11-02T21:58:50","date_gmt":"2019-11-02T12:58:50","guid":{"rendered":"https:\/\/chat-messenger.com\/?p=4718"},"modified":"2024-01-14T02:34:30","modified_gmt":"2024-01-13T17:34:30","slug":"string-valueof-integer-parseint","status":"publish","type":"post","link":"https:\/\/chat-messenger.com\/zh_tw\/\u90e8\u843d\u683c\/java\/\u6574\u6578\u89e3\u6790\u7684\u5b57\u4e32\u503c","title":{"rendered":"Java \u6570\u503c \u21d4 \u5b57\u7b26\u4e32 \u21d4 \u65e5\u671f\u8f6c\u6362"},"content":{"rendered":"<h2>\u6578\u5b57\u21d2\u5b57\u7b26\u4e32\u8f49\u63db<\/h2>\n\n\n\n<p>\u8981\u5c07\u6578\u5b57\u8f49\u63db\u70ba\u5b57\u4e32\uff0c<strong>String.valueof()<\/strong> \u4f7f\u7528\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">String str = String.valueOf(num);<\/pre>\n\n\n\n<p>\u9084\u6709\u5176\u4ed6\u65b9\u6cd5\u53ef\u4ee5\u5beb\u9019\u500b\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">String str = Integer.toString(num); String str = &quot;&quot; + num;<\/pre>\n\n\n\n<p>\u6700\u5f8c\u4e00\u500b\u201c\u201d + num \u5229\u7528\u4e86 Java \u5728\u8207\u5b57\u4e32\u9023\u63a5\u6642\u5c07\u6578\u5b57\u8996\u70ba\u5b57\u4e32\u7684\u80fd\u529b\u3002<\/p>\n\n\n\n<p>\u6700\u5f8c\u4e00\u7a2e\u65b9\u6cd5\u5beb\u8d77\u4f86\u6700\u7c21\u55ae\uff0c\u4f46\u5c0d\u65bc\u6c92\u6709\u6df1\u5165\u4e86\u89e3Java\u7279\u6027\u7684\u4eba\u4f86\u8aaa\u53ef\u80fd\u9700\u8981\u4e00\u4e9b\u6642\u9593\u624d\u80fd\u89e3\u8b80\u5176\u610f\u5716\u3002<\/p>\n\n\n\n<h2>\u5b57\u4e32\u21d2\u6578\u503c\u8f49\u63db<\/h2>\n\n\n\n<p>\u5f9e\u5b57\u4e32\u5230\u6578\u5b57\u7684\u8f49\u63db\u662f<strong>\u6574\u6578.parseInt()<\/strong> \u4f7f\u7528\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">int num = Integer.parseInt(str);<\/pre>\n\n\n\n<p>\u8acb\u6ce8\u610f\uff0c\u5982\u679c\u7531\u65bc\u67d0\u7a2e\u539f\u56e0\u7121\u6cd5\u57f7\u884c\u8f49\u63db\uff0c\u4f8b\u5982\u5305\u542b\u4e0d\u9069\u5408\u8a72\u985e\u578b\u7684\u5b57\u5143\u6216\u6578\u5b57\uff0c\u5247\u6703\u51fa\u73fe NumberFormatException\u3002<\/p>\n\n\n\n<h2>\u65e5\u671f\u21d2\u5b57\u7b26\u4e32\u8f49\u63db<\/h2>\n\n\n\n<p>\u5c07\u65e5\u671f\u8f49\u63db\u70ba\u5b57\u4e32\u6bd4\u5c07\u6578\u5b57\u8f49\u63db\u70ba\u5b57\u4e32\u7a0d\u5fae\u8907\u96dc\u4e00\u4e9b\u3002<\/p>\n\n\n\n<p>\u7b2c\u4e00\u7684 <strong>\u7c21\u55ae\u65e5\u671f\u683c\u5f0f<\/strong> \u5275\u5efa \u7684\u5be6\u4f8b\u3002\u5efa\u7acb\u6642\u6307\u5b9a\u65e5\u671f\u683c\u5f0f\u3002\u9019\u662f\u8f49\u63db\u70ba\u5b57\u4e32\u6642\u7684\u683c\u5f0f\u3002<\/p>\n\n\n\n<p>\u6700\u5f8c <strong>SimpleDateFormat.format()<\/strong> \u88ab\u8f49\u63db\u70ba\u5b57\u4e32\u3002<\/p>\n\n\n\n<h4>\u7bc4\u4f8b\u7a0b\u5f0f\u78bc<\/h4>\n\n\n\n<div class=\"hcb_wrap\" data-no-translation=\"\"><pre class=\"prism line-numbers lang-java\" data-lang=\"Java\"><code>public static void main(String[] args) {\n    Date date = new Date();\n    SimpleDateFormat sdf = new SimpleDateFormat(&quot;yyyy\/MM\/dd hh:mm:ss&quot;);\n    String str = sdf.format(date);\n    \n    System.out.println(&quot;\u65e5\u4ed8\u578b = &quot; + date);\n    System.out.println(&quot;\u6587\u5b57\u5217 = &quot; + str);\n}<\/code><\/pre><\/div>\n\n\n\n<h4>\u8f38\u51fa\u7d50\u679c\uff1a<\/h4>\n\n\n\n<div class=\"hcb_wrap\" data-no-translation=\"\"><pre class=\"prism line-numbers lang-bash\" data-lang=\"Bash\"><code>\u65e5\u4ed8\u578b = Sat Nov 02 12:11:55 UTC 2019\n\u6587\u5b57\u5217 = 2019\/11\/02 12:11:55<\/code><\/pre><\/div>\n\n\n\n<h2>\u5b57\u7b26\u4e32\u21d2\u65e5\u671f\u8f49\u63db<\/h2>\n\n\n\n<p>\u82e5\u8981\u5c07\u5b57\u4e32\u8f49\u63db\u70ba\u65e5\u671f\uff0c\u8acb\u4f7f\u7528<strong>SimpleDateFormat.parse<\/strong> \u65b9\u6cd5\u3002<\/p>\n\n\n\n<p>\u50cf\u5efa\u7acb\u65e5\u671f \u21d2 \u5b57\u4e32\u4e00\u6a23\u5efa\u7acb SimpleDateFormat\u3002\u60a8\u5728\u5efa\u7acb\u6642\u6307\u5b9a\u65e5\u671f\u683c\u5f0f\uff0c\u8a72\u683c\u5f0f\u8207\u6b63\u5728\u8f49\u63db\u7684\u5b57\u4e32\u7684\u65e5\u671f\u683c\u5f0f\u76f8\u7b26\u3002<\/p>\n\n\n\n<p>\u6700\u5f8c <strong>SimpleDateFormat.parse()<\/strong> \u5c07\u5176\u8f49\u63db\u70ba\u65e5\u671f\u3002<\/p>\n\n\n\n<h4>\u7bc4\u4f8b\u7a0b\u5f0f\u78bc<\/h4>\n\n\n\n<div class=\"hcb_wrap\" data-no-translation=\"\"><pre class=\"prism line-numbers lang-java\" data-lang=\"Java\"><code>public static void main(String[] args) {\n    try {\n        String strDate = &quot;2019\/11\/01 12:34:56&quot;;\n     \n        SimpleDateFormat sdf = new SimpleDateFormat(&quot;yyyy\/MM\/dd hh:mm:ss&quot;);\n        Date date = sdf.parse(strDate);\n        \n        System.out.println(&quot;\u6587\u5b57\u5217 = &quot; + strDate);\n        System.out.println(&quot;\u65e5\u4ed8\u578b = &quot; + date);\n        \n    } catch (ParseException e) {\n        \/\/\u4f8b\u5916\u51e6\u7406\n    }\n}<\/code><\/pre><\/div>\n\n\n\n<h4>\u8f38\u51fa\u7d50\u679c\uff1a<\/h4>\n\n\n\n<div class=\"hcb_wrap\" data-no-translation=\"\"><pre class=\"prism line-numbers lang-bash\" data-lang=\"Bash\"><code>\u6587\u5b57\u5217 = 2019\/11\/01 12:34:56\n\u65e5\u4ed8\u578b = Fri Nov 01 00:34:56 UTC 2019<\/code><\/pre><\/div>\n\n\n\n<p>\u8acb\u6ce8\u610f\uff0cparse \u65b9\u6cd5\u6703\u62cb\u51fa ParseException\uff0c\u56e0\u6b64\u60a8\u9700\u8981\u5c07\u5176\u5305\u542b\u5728 try-catch \u8a9e\u53e5\u4e2d\u6216\u518d\u6b21\u62cb\u51fa\u3002<\/p>\n\n\n\n<h2>\u6578\u5b57\u21d4\u65e5\u671f\u8f49\u63db<\/h2>\n\n\n\n<p>\u4e0d\u5e78\u7684\u662f\uff0c\u6c92\u6709\u8a2d\u8a08\u7528\u65bc\u5c07\u6578\u5b57\u8f49\u63db\u70ba\u65e5\u671f\u6216\u5c07\u65e5\u671f\u8f49\u63db\u70ba\u6578\u5b57\u7684\u65b9\u6cd5\u3002\u5169\u8005\u90fd\u9700\u8981\u7d93\u904e\u4e00\u6b21\u5b57\u4e32\u8f49\u63db\u3002<\/p>","protected":false},"excerpt":{"rendered":"<p>\u5f9e\u5b57\u4e32\u8f49\u63db\u6578\u5b57 \u4f7f\u7528 String.valueof() \u5c07\u6578\u5b57\u8f49\u63db\u70ba\u5b57\u4e32\u3002\u7d30\u7e69 [\u2026]<\/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\/4718"}],"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=4718"}],"version-history":[{"count":7,"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/posts\/4718\/revisions"}],"predecessor-version":[{"id":8895,"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/posts\/4718\/revisions\/8895"}],"wp:attachment":[{"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/media?parent=4718"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/categories?post=4718"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/tags?post=4718"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}