Here you can find the source of getLastDay(Date date)
public static Date getLastDay(Date date)
//package com.java2s; //License from project: Apache License import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; public class Main { public static Date getLastDay(Date date) { Calendar cal = Calendar.getInstance(); cal.setTime(date);/*ww w. j a v a 2 s . c o m*/ int value = cal.getActualMaximum(Calendar.DAY_OF_MONTH); cal.set(Calendar.DAY_OF_MONTH, value); return cal.getTime(); } public static String getTime(Date date) { SimpleDateFormat formatter_f = new SimpleDateFormat("yyyy-MM-dd"); String str = formatter_f.format(date); return str; } public static String format(Date aTs_Datetime) { return format(aTs_Datetime, "yyyy-MM-dd"); } public static String format(Date aTs_Datetime, String as_Pattern) { if (aTs_Datetime == null || as_Pattern == null) return null; SimpleDateFormat dateFromat = new SimpleDateFormat(); dateFromat.applyPattern(as_Pattern); return dateFromat.format(aTs_Datetime); } }