题解 | #字符串反转#

public static void main(String[] args) { Scanner in = new Scanner(System.in); while (in.hasNextLine()){ String str = in.nextLine(); String str1 = str.toLowerCase(); StringBuffer sb = new StringBuffer(); for (int i = str1.length()-1; i >= 0; i--) { sb.append(str1.charAt(i)); } System.out.println(sb.toString());

    }
}