Java Get yesterday date

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Take yesterday's date, the cut-off date of this thought is good. Another thought wrong, if today is a number what to do?
Two options available
1: The Old method

  Date as = new Date (new Date (). GetTime () -24*60*60*1000);
  SimpleDateFormat matter1 = new SimpleDateFormat ("Yyyy-mm-dd");
  String time = Matter1.format (AS);
  SYSTEM.OUT.PRINTLN (time);
  Take out the digital time   minus the 24*60*60*1000, you get the time yesterday;
This is a bit out of date!
2:calendar   cal   =   calendar.getinstance ();
  Cal.add (calendar.date,  -1);
  String yesterday = new SimpleDateFormat ("Yyyy-mm-dd"). Format (Cal.gettime ());
  SYSTEM.OUT.PRINTLN (yesterday);
This method is very convenient, month and day can be arbitrary change!
3, with Apache Dateutils (requires import org.apache.commons.lang.time.DateUtils;)
  Date currenttime = Apputils.getcurrentdate ();
 //Get yesterday time
  Date backuptime=dateutils.adddays (CurrentTime,-1);
 
4.sql query condition contains the processing method of the time:
Select * from TBIMC1 where Create_date_<to_date (To_char (sysdate-1, ' yyyy-mm-dd ') , ' Yyyy-mm-dd ')


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Java gets yesterday's date