Here you can find the source of getYestoday(String sourceDate, String format)
public static String getYestoday(String sourceDate, String format)
//package com.java2s; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; import java.util.GregorianCalendar; public class Main { public static String getYestoday(String sourceDate, String format) { return getFormatDateAdd(getDateFromString(sourceDate, format), -1, format);//from w w w .j ava 2s. c o m } public static String getFormatDateAdd(Date date, int amount, String format) { Calendar cal = new GregorianCalendar(); cal.setTime(date); cal.add(GregorianCalendar.DATE, amount); return getFormatDateTime(cal.getTime(), format); } public static Date getDateFromString(String dateStr, String pattern) { SimpleDateFormat sdf = new SimpleDateFormat(pattern); Date resDate = null; try { resDate = sdf.parse(dateStr); } catch (Exception e) { e.printStackTrace(); } return resDate; } public static String getFormatDateTime(Date date, String format) { SimpleDateFormat sdf = new SimpleDateFormat(format); return sdf.format(date); } }