public class FanZhuan {
      public static void main(String[] args) {
          String s = "987654321088123about我是谁";         System.out.println("直接输出：" + s);         String str = String.valueOf(s);         String reverseStr = "";         for (int i = str.length()-1; i >=0; i--) {
              reverseStr +=str.charAt(i);         }         System.out.println("反转输出："+reverseStr);     } }