Java tutorial
//package com.java2s; import java.util.Calendar; public class Main { public static long getTimeMillisAsHourAndMinute(long millis) { Calendar calendar = Calendar.getInstance(); calendar.setTimeInMillis(millis); int hour = calendar.get(Calendar.HOUR_OF_DAY); int minute = calendar.get(Calendar.MINUTE); calendar.setTimeInMillis(System.currentTimeMillis()); calendar.set(Calendar.HOUR_OF_DAY, hour); calendar.set(Calendar.MINUTE, minute); return calendar.getTimeInMillis(); } }