How to Specify a Time Zone for a java.util.Date Object?

Setting Time Zone of a java.util.Date

When parsing a java.util.Date from a string, the default local time zone is often applied. However, this may not be the desired time zone for the date. This article explores how to specify a specific time zone for a java.util.Date.

Utilizing DateFormat

To set the time zone of a Date object effectively, the DateFormat class can be employed. This class provides the ability to parse and format dates according to different time zones. Here's an example demonstrating its usage:

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;

public class SetTimezoneOfDate {

    public static void main(String[] args) throws Exception {
        // Create a date object from a string
        String dateString = "2010-05-23T09:01:02";

        // Initialize a SimpleDateFormat object
        SimpleDateFormat isoFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss");

        // Set the desired time zone (UTC in this example)
        isoFormat.setTimeZone(TimeZone.getTimeZone("UTC"));

        // Parse the string into a Date object
        Date date = isoFormat.parse(dateString);

        // Display the parsed date with the specified time zone
        System.out.println("Parsed Date: " + date);
    }
}

In this example, the SimpleDateFormat is configured to use the "UTC" time zone before parsing the date string. This ensures that the parsed Date object accurately reflects the specified time zone. The output will display the parsed date with the UTC time zone applied.

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