Convert UTC Time with offset to LocalTime

I am using joda 2.7, I want to convert

      UTC Time= 09:30:10-06:00
   to Local Time= 03:30:10
         and
      UTC Time=10:45:00+07:30
   to Local Time = 18:15:00

I tried different formats both joda's and my own and methods to handle the offset part, but I am not able to get the required output. What is the best approach.

Solution

You can do:

DateTimeFormatter fmt = DateTimeFormat.forPattern("HH:mm:ssZ");
String utcTime = "09:30:10-06:00";
DateTime localTime = fmt.parseDateTime(utcTime);
String localTimeString = localTime.toString("HH:mm:ss");

This will convert it to your local time, according to your default timezone (do System.out.println(DateTimeZone.getDefault()) to check what's your default timezone).

If you want to convert to a different timezone, you need to do something like:

DateTimeFormatter fmt = DateTimeFormat.forPattern("HH:mm:ssZ").withZone(/*DateTimeZone you want*/);

In your specific cases, to get the output you want, you just need to use the timezone in which you have the desired outputs:

DateTimeFormatter fmt = DateTimeFormat.forPattern("HH:mm:ssZ").withZone(DateTimeZone.forOffsetHours(-12));

String utcTime = "09:30:10-06:00";
DateTime localTime = fmt.parseDateTime(utcTime);
System.out.println(localTime.toString("HH:mm:ss"));

utcTime = "10:45:00+07:30";
localTime = fmt.withZone(DateTimeZone.forOffsetHours(15)).parseDateTime(utcTime);
System.out.println(localTime.toString("HH:mm:ss"));

Output is:

03:30:10
18:15:00