Here you can find the source of getCurrHourDate()
public static String getCurrHourDate()
//package com.java2s; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; public class Main { public static String getCurrHourDate() { Calendar now = Calendar.getInstance(); String date = getDate(now.getTime(), "yyyy-MM-dd"); int hour = now.get(Calendar.HOUR_OF_DAY); return date + "_" + hour; }/*from w w w .j a va 2 s . c o m*/ public static String getDate() { return getDate(getCurDate(), "yyyy-MM-dd"); } public static String getDate(Date date, String format) { String dtstr = ""; if (date == null) { return dtstr; } if (format == null || "".equals(format.trim())) { format = "yyyy-MM-dd"; } SimpleDateFormat sdf = new SimpleDateFormat(format); dtstr = sdf.format(date); return (dtstr == null ? "" : dtstr); } public static String getDate(Date date) { return getDate(date, "yyyy-MM-dd"); } public static Date getDate(long time) { Calendar c = getCurCalendar(); c.setTimeInMillis(time); return c.getTime(); } public static String getTime(Calendar c) { return getDate(c.getTime(), "HH:mm:ss"); } public static Date getCurDate() { return getCurCalendar().getTime(); } public static Calendar getCurCalendar() { return Calendar.getInstance(); } }