String oldStr = “abc”;
String newStr = oldStr.substring(0, 1).toUpperCase() + oldStr.substring(1);
//Abc
System.out.println(newStr);
java中字符串首字母大写
最新推荐文章于 2025-04-14 08:17:48 发布
String oldStr = “abc”;
String newStr = oldStr.substring(0, 1).toUpperCase() + oldStr.substring(1);
//Abc
System.out.println(newStr);