Java字符串格式转化成日期格式并减去几天的时间

String beginTime="2019-05-24 00:00:00";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date date = sdf.parse(beginTime);
System.out.println("原始时间====" + date);
System.out.println("原始时间减去10天====" + sdf.format(new Date(date.getTime() - (long) 10 * 24 * 60 * 60 * 1000)));
String jianTime = sdf.format(new Date(date.getTime() - (long) 10 * 24 * 60 * 60 * 1000));