字符串倒着输出

    /**
     *     倒着输出
     * @param originStr
     * @return
     */
    public static String reverse(String originStr) {
        if(originStr == null || originStr.length() <= 1) 
            return originStr;
        String substring = originStr.substring(1);
        char charAt = originStr.charAt(0);
        return reverse(substring) + charAt;
    }

/**
   *
   *demo
   */  

  public static void main(String[] args) throws Exception{
        for (int i = 0; i < 1; i++) {
            String string = reverse("abc");
            System.out.println(string);    //cba
        }
    }