want to change the format of date in java [duplicate]

Question

this is code , the output of the code is "Thu Jun 06 08:00:00 PKT 2013" , but i want the format 2013-06-08 00:00:00 , kindly help me

 import java.text.SimpleDateFormat; import java.text.ParseException; import java.util.*; import javax.script.*; public class time { public static void main (String[] args)throws ParseException{ String date1 = "2013/06/06"; String time1 = "08:00 AM"; String time2 = "18:00 PM"; SimpleDateFormat sdf = new SimpleDateFormat("yyy/MM/dd hh:mm "); try{ Date dateObj1 = sdf.parse(date1 + " " + time1); Date dateObj3 = sdf.parse(date1 + " " + time2); System.out.println("Date Start: "+dateObj1); System.out.println("Date End: "+dateObj3); int c=0; long dif = dateObj1.getTime(); while (dif < dateObj3.getTime()) { System.out.println(c++); Date slot = new Date(dif); System.out.println("Hour Slot --->" + slot); dif+=3600000; } System.out.println("c is :"+c); } catch(ParseException e){ ; } } }

By convention, Java type names usually start with an uppercase letter. — Sam Su
– Sam Su, Commented Jun 9, 2013 at 8:40

AllTooSir · Accepted Answer · 2013-06-09 08:50:01Z

The format of a Date is only for display purpose. We shouldn't be concerned how the run time represents or stores the Date object internally . See the comments in code :

String date1 = "2013/06/06"; String time1 = "08:00 AM"; // You are trying to convert the String "2013/06/06 08:00 AM" to a Date object // for this you tell the DateFormat that the date string is formatted as // "yyyy/MM/dd hh:mm a" , so when you parse the String to Date , it is converted to // a valid and expected Date object. DateFormat df = new SimpleDateFormat("yyyy/MM/dd hh:mm a"); Date date = df.parse(date1+" "+time1); System.out.println(date); //Thu Jun 06 08:00:00 IST 2013 // To print "2013-06-06 08:00:00" // You tell SimpleDateFormat to format the date as ""yyyy-MM-dd hh:mm:ss" while //printing System.out.println(new SimpleDateFormat("yyyy-MM-dd hh:mm:ss").format(date));

S Kr · Accepted Answer · 2013-06-09 08:56:06Z

Use this

 String date1 = "2013/06/06"; String time1 = "08:00 AM"; String time2 = "18:00 PM"; SimpleDateFormat sdf = new SimpleDateFormat("yyy/MM/dd hh:mm "); SimpleDateFormat sdf1 = new SimpleDateFormat("yyy-MM-dd hh:mm:ss "); try{ Date dateObj1 = sdf.parse(date1 + " " + time1); Date dateObj3 = sdf.parse(date1 + " " + time2); System.out.println("Date Start: "+sdf1.format(dateObj1)); System.out.println("Date End: "+sdf1.format(dateObj3)); int c=0; long dif = dateObj1.getTime(); while (dif < dateObj3.getTime()) { System.out.println(c++); Date slot = new Date(dif); System.out.println("Hour Slot --->" + sdf1.format(slot)); dif+=3600000; } System.out.println("c is :"+c); } catch(ParseException e){ ; }

My advice: Java 6 's data conversions is bad. Use joda time

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