Java中如何实现时间对象的精确操作？

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javaprivate synchronized static String getTransFileDateTime() { long time=System.currentTimeMillis(); SimpleDateFormat sdfTime=new SimpleDateFormat(yyyyMMddHHmmss); return sdfTime.format(time);}

private synchronized static String getTransFileDateTime() {

try {

Thread.sleep(1);

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

long time = System.currentTimeMillis();

SimpleDateFormat sdfTimeb = new SimpleDateFormat("yyyyMMddHHmmssSS");

Date d = new Date(time);

String formatStr = sdfTimeb.format(d);

return formatStr;

}