java如何判断一个字符串某个字符有几个

判断长度 "abc".length() 判断某个字du符有zhidao几个 String a = "abbdfsads"; int n = a.length()-a.replaceAll("a", "").length();System.out.println("字符串zhuan字符 ...

Wed Mar 03 16:50:00 CST 2021 0 1640
 
粤ICP备18138465号  © 2018-2025 CODEPRJ.COM