Here you can find the source of formatDateTime(Date date)
public static String formatDateTime(Date date)
//package com.java2s; //License from project: Apache License import java.text.SimpleDateFormat; import java.util.Date; public class Main { private static final String DEFAULT_DATE_PATTERN = "yyyy-MM-dd"; private static final String DEFAULT_DATETIME_PATTERN = "yyyy-MM-dd hh:mm:ss"; public static String formatDateTime(Date date) { return formatDate(date, DEFAULT_DATETIME_PATTERN); }/* w w w. j a v a2 s. co m*/ public static String formatDateTime(long date) { return formatDate(new Date(date), DEFAULT_DATETIME_PATTERN); } public static String formatDate(Date date, String pattern) { SimpleDateFormat format = new SimpleDateFormat(pattern); return format.format(date); } public static String formatDate(Date date) { return formatDate(date, DEFAULT_DATE_PATTERN); } /** * @param date long: 141536480014L * @return */ public static String formatDate(long date) { return formatDate(new Date(date), DEFAULT_DATE_PATTERN); } }