Java tutorial
//package com.java2s; import java.text.NumberFormat; import java.util.Calendar; public class Main { public final static String TIME_NONE = "none"; public static String getTimeFromLong(long l) { Calendar c = Calendar.getInstance(); c.setTimeInMillis(l); Calendar t = Calendar.getInstance(); t.set(Calendar.HOUR_OF_DAY, 0); t.set(Calendar.MINUTE, 1); t.set(Calendar.SECOND, 0); if (c.after(t)) { NumberFormat nf = NumberFormat.getInstance(); nf.setMinimumIntegerDigits(2); return nf.format(c.get(Calendar.HOUR_OF_DAY)) + ":" + nf.format(c.get(Calendar.MINUTE)); } else { return TIME_NONE; } } }