Unparseable date error in Java -

i want convert system date yyyy-mm-dd format. there similar questions in so. found need parse date in input format , convert output format. stuck @ first stage itself. not able parse system date such (sat apr 25 14:44:15 ist 2015).

here mwe:

import java.util.*; import java.text.*;  public class test {     public static void main(string[] args)     {         try         {             date date = new date();                                       simpledateformat dateformat = new simpledateformat("eee mm dd hh:mm:ss aaa yyyy");                       date = dateformat.parse(date.tostring());             system.out.println(date);         }         catch(exception e)         {             system.out.println(e.getmessage());         }     } } 

i exception :

unparseable date: "sat apr 25 14:53:33 ist 2015"

date object can converted string of date format. string can converted date come in standard date format's cant in 1 want..

if want format system date yyyy-mm-dd format use:

date date = new date(); simpledateformat dateformater = new simpledateformat("yyyy-mm-dd");            string date1 = dateformater.format(date); 

as specified in comment want subtract sql date current date convert sql date normal date format.
this:

string date = date; simpledateformat dateformat = new simpledateformat("yyyy-mm-dd");      date date1 = dateformat.parse(date);  date currentdate = new date(); 

then use calender objects:

calendar calendar = calendar.getinstance(); calendar.settime(date1);  calendar calendar2 = calendar.getinstance(); calendar2.settime(currentdate);  long difference = (calendar2.gettimeinmillis() - calendar     .gettimeinmillis()) / 60000; 

this give difference between 2 dates in minutes.