Print date in different locales

Time & Locale

package _;

import org.joda.time.DateTime;
import org.joda.time.DateTimeZone;
import org.joda.time.format.ISODateTimeFormat;
 
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;

/**
 * Getting and printing time with different locales.
 * 
 * A sample output of this program is:
 * -- java 7 time: ---
 Date.toString in Amsterdam: Wed May 27 15:18:07 CEST 2015
 Date.toString in Tokyo:     Wed May 27 22:18:07 JST 2015
 Time difference:-8ms
 Amsterdam prints time in UTC       2015-05-27T01:18:07.480Z
 Amsterdam prints time in Tokyo     2015-05-27T10:18:07.480Z
 Amsterdam prints time in Amsterdam 2015-05-27T03:18:07.480Z
 Tokyo prints time in UTC       2015-05-27T01:18:07.488Z
 Tokyo prints time in Tokyo     2015-05-27T10:18:07.488Z
 Tokyo prints time in Amsterdam 2015-05-27T03:18:07.488Z
 -- Joda time: ---
 DateTime.toString in Amsterdam: 2015-05-27T15:18:07.535+02:00
 DateTime.toString in Tokyo    : 2015-05-27T22:18:07.580+09:00
 Amsterdam time in UTC: 2015-05-27T13:18:07.535Z
 Tokyo     time in UTC: 2015-05-27T13:18:07.580Z

 Process finished with exit code 0
 */
public class Time {
    public static void main(String[] args) {
        printTimesWithJava7();
        printTimeWithJoda();
    }

    private static void printTimesWithJava7() {
        System.out.println("-- java 7 time: ---");

        TimeZone tzAmsterdam = TimeZone.getTimeZone("Europe/Amsterdam");
        TimeZone tzTokyo = TimeZone.getTimeZone("Asia/Tokyo");
        TimeZone tzUtc = TimeZone.getTimeZone("UTC");
        
        // a computer in Amsterdam gets the time and prints it
        TimeZone.setDefault(tzAmsterdam);
        Date nowAmsterdam = new Date();
        System.out.println("Date.toString in Amsterdam: " + nowAmsterdam);

        // a computer in Tokyo gets the time and prints it
        TimeZone.setDefault(tzTokyo);
        Date nowTokyo = new Date();
        System.out.println("Date.toString in Tokyo:     " + nowTokyo);

        // The time difference is just the time consumed by println
        System.out.println("Time difference:" + (nowAmsterdam.getTime() - nowTokyo.getTime()) + "ms");

        // Prepare time formatters: UTC, Amsterdam, Tokyo
        SimpleDateFormat formatUTC = new SimpleDateFormat("yyyy-MM-dd'T'hh:mm:ss.SSS'Z'");
        formatUTC.setTimeZone(tzUtc);
        SimpleDateFormat formatAmsterdam = new SimpleDateFormat("yyyy-MM-dd'T'hh:mm:ss.SSS'Z'");
        formatAmsterdam.setTimeZone(tzAmsterdam);
        SimpleDateFormat formatTokyo = new SimpleDateFormat("yyyy-MM-dd'T'hh:mm:ss.SSS'Z'");
        formatTokyo.setTimeZone(tzTokyo);

        //Amsterdam prints times
        TimeZone.setDefault(tzAmsterdam);
        System.out.println("Amsterdam prints time in UTC       " + formatUTC.format(nowAmsterdam));
        System.out.println("Amsterdam prints time in Tokyo     " + formatTokyo.format(nowAmsterdam));
        System.out.println("Amsterdam prints time in Amsterdam " + formatAmsterdam.format(nowAmsterdam));

        //Tokyo prints times
        TimeZone.setDefault(tzTokyo);
        System.out.println("Tokyo prints time in UTC       " + formatUTC.format(nowTokyo));
        System.out.println("Tokyo prints time in Tokyo     " + formatTokyo.format(nowTokyo));
        System.out.println("Tokyo prints time in Amsterdam " + formatAmsterdam.format(nowTokyo));

    }

    private static void printTimeWithJoda() {

        System.out.println("-- Joda time: ---");


        DateTimeZone tzAmsterdam = DateTimeZone.forID("Europe/Amsterdam");
        DateTimeZone tzTokyo = DateTimeZone.forID("Asia/Tokyo");


        // a computer in Amsterdam gets the time and prints it
        DateTime nowAmsterdam = new DateTime(tzAmsterdam);
        System.out.println("DateTime.toString in Amsterdam: " + nowAmsterdam);

        // a computer in Tokyo gets the time and prints it
        DateTime nowTokyo = new DateTime(tzTokyo);
        System.out.println("DateTime.toString in Tokyo    : " + nowTokyo);


        System.out.println("Amsterdam time in UTC: " +
            ISODateTimeFormat.dateTime().print(nowAmsterdam.toInstant()));
        System.out.println("Tokyo     time in UTC: " +
            ISODateTimeFormat.dateTime().print(nowTokyo.toInstant()));
    }
}