StringBuilder实现字符串反转

public class StringBuilderDemo02 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入一个字符串：");
        String line = sc.nextLine();

        String s = myReverse(line);
        System.out.println(s);

    }

    public static String myReverse(String s) {
        StringBuilder sb = new StringBuilder(s);
        sb.reverse();
        String ss = sb.toString();
        return ss;
    }
}



myReverse的简洁写法：

public static String myReverse(String s) {
    return new StringBuilder(s).reverse().toString();
}