第2个回答 2021-04-07
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.print("输入任意正整数:");
StringBuffer sb = new StringBuffer(input.next());
sb.reverse();
System.out.print("逆序为:");
System.out.println(sb);
}本回答被网友采纳