Here you can find the source of getLastYearMonthYYYYMM()
public static String getLastYearMonthYYYYMM()
//package com.java2s; //License from project: Open Source License import java.text.SimpleDateFormat; import java.util.Calendar; public class Main { public static String getLastYearMonthYYYYMM() { Calendar calendar = Calendar.getInstance(); calendar.set(Calendar.MONTH, calendar.get(Calendar.MONTH) - 1); SimpleDateFormat simpleFormate = new SimpleDateFormat("yyyyMM"); return simpleFormate.format(calendar.getTime()).trim(); }/* w ww. j av a2s.co m*/ public static String format(java.util.Date date, String format) { String result = ""; try { if (date != null) { java.text.DateFormat df = new java.text.SimpleDateFormat(format); result = df.format(date); } } catch (Exception e) { } return result; } public static String format(java.util.Date date) { return format(date, "yyyy/MM/dd"); } public static String getTime(java.util.Date date) { return format(date, "HH:mm:ss"); } }