Here you can find the source of getYesterday()
public static String getYesterday()
//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 String getYesterday() { Calendar calendar = Calendar.getInstance(); calendar.add(Calendar.DATE, -1); return formatDate(calendar.getTime(), "yyyy-MM-dd"); }//from www . ja v a 2 s .c o m public static String formatDate(Date date) { if (date == null) { return ""; } SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); return dateFormat.format(date); } public static String formatDate(Date date, String format) { SimpleDateFormat dateFormat = new SimpleDateFormat(format); return dateFormat.format(date); } }