import java.time.Instant;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
import java.util.Locale;
 
public class Main {
	public static void main(String[] args) {
		// Test
		System.out.println(getFormattedDateTimeInDeviceTz("2021-10-26T18:12:20.698134Z", "uuuu-MM-dd'T'HH:mm:ssXXX"));
	}
 
	static String getFormattedDateTimeInDeviceTz(String iso, String pattern) {
		Instant instant = Instant.parse(iso);
 
		// Get the date-time in the device's timezone (e.g. Asia/Kolkata
		DateTimeFormatter dtf = DateTimeFormatter.ofPattern(pattern, Locale.ENGLISH);
		return instant.atZone(ZoneId.of("Asia/Kolkata")).format(dtf);
	}
}

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