{"id":2156,"date":"2020-08-23T11:04:38","date_gmt":"2020-08-23T03:04:38","guid":{"rendered":"http:\/\/127.0.0.2\/?p=2156"},"modified":"2020-08-23T11:05:34","modified_gmt":"2020-08-23T03:05:34","slug":"2020java%e6%95%99%e7%a8%8b%ef%bc%9a%e5%8f%af%e5%8f%98%e5%ad%97%e7%ac%a6%e4%b8%b2%e4%b9%a0%e9%a2%98","status":"publish","type":"post","link":"https:\/\/www.9713job.com\/?p=2156","title":{"rendered":"2020java\u6559\u7a0b\uff1a\u53ef\u53d8\u5b57\u7b26\u4e32\u4e60\u9898"},"content":{"rendered":"<h3>\u53ef\u53d8\u5b57\u7b26\u4e32\u4e60\u9898<\/h3>\n<pre>\u83b7\u53d6\u90ae\u7bb1 \"\u6211\u7231\u4f60\u5440@baidu.com.cn\"\u4e2d\u7684\u7528\u6237\u540d \"\u6211\u7231\u4f60\u5440\"<\/pre>\n<pre>public class demos{\r\n    public static void main(String[] args) {\r\n        \/\/\u83b7\u53d6\u90ae\u7bb1 \"\u6211\u7231\u4f60\u5440@baidu.com.cn\"\u4e2d\u7684\u7528\u6237\u540d \"\u6211\u7231\u4f60\u5440\"\r\n        String s=\"\u6211\u7231\u4f60\u5440@baidu.com.cn\";\r\n        int i1 = s.indexOf(\"@\");\r\n        String str=s.substring(0,i1);\r\n        System.out.println(str);\r\n    }\r\n}<\/pre>\n<p><!--more--><\/p>\n<p>\u7ed9\u90ae\u7bb1\u7528\u6237\u540d\u540e\u9762\u8ffd\u52a0\u90ae\u7bb1\u540e\u7f00<\/p>\n<pre>public class demos{\r\n    public static void main(String[] args) {\r\n        \/\/\u7ed9\u90ae\u7bb1\u7528\u6237\u540d\u540e\u9762\u8ffd\u52a0\u90ae\u7bb1\u540e\u7f00\r\n        String s=\"hao123\";\r\n        String emailName=emailEnds(s);\r\n        System.out.println(emailName);\r\n    }\r\n    public static String emailEnds(String emailName){\r\n        StringBuilder sb=new StringBuilder(emailName);\r\n        sb.append(\"@baidu.com.cn\");\r\n        return sb.toString();\r\n    }\r\n}<\/pre>\n<p>\u83b7\u53d6\u968f\u673a\u7684 4 \u4e2a\u5b57\u7b26\uff0c\u5e76\u4f7f\u7528 StringBuilder \u62fc\u63a5\u6210\u5b57\u7b26\u4e32\u3002<\/p>\n<pre>import java.util.Random;\r\n\r\npublic class demos{\r\n    public static void main(String[] args) {\r\n        \/\/\u83b7\u53d6\u968f\u673a\u7684 4 \u4e2a\u5b57\u7b26\uff0c\u5e76\u4f7f\u7528 StringBuilder \u62fc\u63a5\u6210\u5b57\u7b26\u4e32\u3002\r\n        String s=\"ABCDEFGhijklmn1234567890\";\r\n        StringBuilder sb=new StringBuilder();\r\n        Random random=new Random();\r\n        for(int i=0;i&lt;4;i++){\r\n            int n = random.nextInt(s.length());\r\n            char c=s.charAt(n);\r\n            sb.append(c);\r\n        }\r\n        System.out.println(sb.toString());\r\n    }\r\n}<\/pre>\n<p>\u7edf\u8ba1\u51fa\u6bcf\u4e2a\u6570\u5b57\u51fa\u73b0\u7684\u6b21\u6570<\/p>\n<pre>public class demos{\r\n    public static void main(String[] args) {\r\n        \/\/\u7edf\u8ba1\u51fa\u6bcf\u4e2a\u6570\u5b57\u51fa\u73b0\u7684\u6b21\u6570\r\n        String s=\"748965204856201\";\r\n        int[] count=new int[10];\r\n        char[] c=s.toCharArray();\r\n        for(char i=48;i&lt;58;i++){\r\n            int a=0;\r\n            for(int j=0;j&lt;s.length();j++){\r\n                if(c[j]==i){\r\n                    a++;\r\n                    count[i-48]=a;\r\n                }\r\n            }\r\n        }\r\n        for(int i=0;i&lt;count.length;i++){\r\n            System.out.println(i+\"\u51fa\u73b0\u4e86\"+count[i]);\r\n        }\r\n    }\r\n}<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u53ef\u53d8\u5b57\u7b26\u4e32\u4e60\u9898 \u83b7\u53d6\u90ae\u7bb1 &#8220;\u6211\u7231\u4f60\u5440@baidu.com.cn&#8221;\u4e2d\u7684\u7528\u6237\u540d &#8220;\u6211\u7231\u4f60\u5440&#8221; public cla [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-2156","post","type-post","status-publish","format-standard","hentry"],"_links":{"self":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts\/2156","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2156"}],"version-history":[{"count":2,"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts\/2156\/revisions"}],"predecessor-version":[{"id":2159,"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts\/2156\/revisions\/2159"}],"wp:attachment":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2156"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2156"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2156"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}