Here you can find the source of getDay(SimpleDateFormat df, String dateStr)
public static int getDay(SimpleDateFormat df, String dateStr)
//package com.java2s; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; public class Main { public static int getDay(SimpleDateFormat df, String dateStr) { Calendar c = Calendar.getInstance(); try {// w ww .j av a2s. co m c.setTime(df.parse(dateStr)); } catch (ParseException e) { e.printStackTrace(); } return c.get(Calendar.DATE); } public static Date parse(SimpleDateFormat df, String date) { try { return df.parse(date); } catch (ParseException e) { return null; } } }