Here you can find the source of getPrevHour(Date date)
public static Date getPrevHour(Date date)
//package com.java2s; //License from project: Apache License import java.text.DateFormat; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; public class Main { public static long MINUTE_MILLISECONDS = 1000 * 60; public static Date getPrevHour(Date date) { return new Date(date.getTime() - 60 * MINUTE_MILLISECONDS); }/*w w w. jav a 2s . c o m*/ public static long getTime(String s) { return parseMysql(s).getTime(); } public static Date parseMysql(String s) { try { DateFormat fmtTemp = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); return fmtTemp.parse(s); } catch (ParseException e) { return null; } } }