大小写转换

public class DaXiao_cast {
    public static void main(String[] args) {
        String s = "aAsdsWERr";
        System.out.println(s.toUpperCase());
        System.out.println(s.toLowerCase());

        String a = s.toUpperCase();
        System.out.println(a);
    }
}

标签：转换,String,System,toUpperCase,大小写,println,public,out
来源： https://www.cnblogs.com/longesang/p/10967967.html