Java tutorial
//package com.java2s; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; public class Main { public static String getNowTime(int i) { SimpleDateFormat dft = new SimpleDateFormat("yyyyMMdd"); Date beginDate = new Date(); Calendar date = Calendar.getInstance(); date.setTime(beginDate); date.set(Calendar.DATE, date.get(Calendar.DATE) - i); Date endDate = null; try { endDate = dft.parse(dft.format(date.getTime())); String format = dft.format(endDate); return format; } catch (ParseException e) { e.printStackTrace(); } return ""; } }