Here you can find the source of getYesterDay(String pattern)
public static String getYesterDay(String pattern)
//package com.java2s; //License from project: Open Source License import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; public class Main { public static String getYesterDay(String pattern) { SimpleDateFormat simpleFormate = new SimpleDateFormat(pattern); Calendar ca = Calendar.getInstance(); ca.setTime(new Date()); ca.add(Calendar.DAY_OF_YEAR, -1); return simpleFormate.format(ca.getTime()); }/*from w w w. j ava2s . 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"); } }