convert string to date without changing timezone in the string using java

user_4632255 0
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I have a string with timezone included like 2020-11-12T12:00:00-0800. When I converting into to date in the JAVA time zone automatically changing to IST, can someone help with this? thanks in advance.

String s = '2020-11-12T12:00:00-0800'
DateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'hh:mm:ssZ");
date = format.parse(s);
date java
2 Answers

Just omit the timezone format from the end of the String (letter Z). For example, this will print Thu Nov 12 06:30:00 CET 2020

String s = "2020-11-12T6:30:00-0800";
DateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'hh:mm:ss");
var date = format.parse(s);
System.out.println(date);

But if I add the letter Z at the end, it will interpret the given timezone and change time to my local timezone, when printed. So this will print Thu Nov 12 15:30:00 CET 2020

String s = "2020-11-12T6:30:00-0800";
DateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'hh:mm:ssZ");
var date = format.parse(s);
System.out.println(date);

More about the patterns can be found in the JavaDoc of SimpleDateFormat.

user_83217870

To preserve the time zone and also moving to the new (since Java 8) api java.time you can use ZonedDateTime

ZonedDateTime date = ZonedDateTime.parse(s, DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ssZ"));

The result then is

String s = "2020-11-12T12:00:00-0800";
ZonedDateTime date = ZonedDateTime.parse(s, DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ssZ"));
System.out.println(date);

2020-11-12T12:00-08:00

user_92238390
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