Here you can find the source of format(long date)
public static String format(long date)
//package com.java2s; /*/*from w w w . ja va 2 s.c o m*/ Copyright 2013 Nationale-Nederlanden Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ import java.text.SimpleDateFormat; import java.util.Date; public class Main { /** * Format for "yyyy-MM-dd HH:mm:ss.SSS" */ public static final String FORMAT_FULL_GENERIC = "yyyy-MM-dd HH:mm:ss.SSS"; public static String format(Date date, String dateFormat) { SimpleDateFormat formatter = new SimpleDateFormat(dateFormat); return formatter.format(date); } public static String format(long date, String dateFormat) { return format(new Date(date), dateFormat); } public static String format(long date) { return format(new Date(date), FORMAT_FULL_GENERIC); } public static String format(Date date) { return format(date, FORMAT_FULL_GENERIC); } }