Here you can find the source of getMonth(Date d)
public static int getMonth(Date d)
//package com.java2s; import java.util.Calendar; import java.util.Date; import java.util.GregorianCalendar; import java.util.Locale; import java.util.TimeZone; public class Main { /**//from ww w . j av a 2s .c om * Jan = 1 ... Dec = 12 */ public static int getMonth(Date d) { Calendar c = getCalendar(); c.setTime(d); return (c.get(Calendar.MONTH) + 1); } /** * month ranges from 1 to 12 (not 0 to 11) */ private static Calendar getCalendar() { return (getCalendar(null, null)); } private static Calendar getCalendar(TimeZone timeZone, Locale locale) { if (timeZone == null) timeZone = TimeZone.getDefault(); if (locale == null) locale = Locale.getDefault(); Calendar c = new GregorianCalendar(timeZone, locale); return (c); } public static Date setTime(Date d, long time) { d.setTime(time); return (d); } }