[ 뇌를 자극하는 Java 프로그래밍 ] 9장, Excercise 9-5

세계 시간 프로그램

뉴욕, 홍콩, 파리의 현재 시간을 다음과 같은 포맷으로 한꺼번에 출력하는 프로그램을 작성하십시오.

뉴욕 2005/11/13    (일)    오후 7:32

홍콩 2005/11/14    (월)    오전 8:32

파리 2005/11/14    (월)    오전 1:32

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일단 식별자를 알아야 한다.

import java.util.*; class TimeZoneTest { public static void main( String args[] ) { String [] ids = TimeZone.getAvailableIDs(); for( String id : ids ) { System.out.println( id ); } } }

위의 코드로 다음과 같은 결과를 획득했다.

Etc/GMT+12

Etc/GMT+11

Pacific/Midway

Pacific/Niue

Pacific/Pago_Pago

Pacific/Samoa

US/Samoa

America/Adak

America/Atka

Etc/GMT+10

HST

Pacific/Honolulu

Pacific/Johnston

Pacific/Rarotonga

Pacific/Tahiti

SystemV/HST10

US/Aleutian

US/Hawaii

Pacific/Marquesas

AST

America/Anchorage

America/Juneau

America/Nome

America/Sitka

America/Yakutat

Etc/GMT+9

Pacific/Gambier

SystemV/YST9

SystemV/YST9YDT

US/Alaska

America/Dawson

America/Ensenada

America/Los_Angeles

America/Metlakatla

America/Santa_Isabel

America/Tijuana

America/Vancouver

America/Whitehorse

Canada/Pacific

Canada/Yukon

Etc/GMT+8

Mexico/BajaNorte

PST

PST8PDT

Pacific/Pitcairn

SystemV/PST8

SystemV/PST8PDT

US/Pacific

US/Pacific-New

America/Boise

America/Cambridge_Bay

America/Chihuahua

America/Creston

America/Dawson_Creek

America/Denver

America/Edmonton

America/Hermosillo

America/Inuvik

America/Mazatlan

America/Ojinaga

America/Phoenix

America/Shiprock

America/Yellowknife

Canada/Mountain

Etc/GMT+7

MST

MST7MDT

Mexico/BajaSur

Navajo

PNT

SystemV/MST7

SystemV/MST7MDT

US/Arizona

US/Mountain

America/Bahia_Banderas

America/Belize

America/Cancun

America/Chicago

America/Costa_Rica

America/El_Salvador

America/Guatemala

America/Indiana/Knox

America/Indiana/Tell_City

America/Knox_IN

America/Managua

America/Matamoros

America/Menominee

America/Merida

America/Mexico_City

America/Monterrey

America/North_Dakota/Beulah

America/North_Dakota/Center

America/North_Dakota/New_Salem

America/Rainy_River

America/Rankin_Inlet

America/Regina

America/Resolute

America/Swift_Current

America/Tegucigalpa

America/Winnipeg

CST

CST6CDT

Canada/Central

Canada/East-Saskatchewan

Canada/Saskatchewan

Chile/EasterIsland

Etc/GMT+6

Mexico/General

Pacific/Easter

Pacific/Galapagos

SystemV/CST6

SystemV/CST6CDT

US/Central

US/Indiana-Starke

America/Atikokan

America/Bogota

America/Cayman

America/Coral_Harbour

America/Detroit

America/Fort_Wayne

America/Grand_Turk

America/Guayaquil

America/Havana

America/Indiana/Indianapolis

America/Indiana/Marengo

America/Indiana/Petersburg

America/Indiana/Vevay

America/Indiana/Vincennes

America/Indiana/Winamac

America/Indianapolis

America/Iqaluit

America/Jamaica

America/Kentucky/Louisville

America/Kentucky/Monticello

America/Lima

America/Louisville

America/Montreal

America/Nassau

America/New_York

America/Nipigon

America/Panama

America/Pangnirtung

America/Port-au-Prince

America/Thunder_Bay

America/Toronto

Canada/Eastern

Cuba

EST

EST5EDT

Etc/GMT+5

IET

Jamaica

SystemV/EST5

SystemV/EST5EDT

US/East-Indiana

US/Eastern

US/Michigan

America/Caracas

America/Anguilla

America/Antigua

America/Argentina/San_Luis

America/Aruba

America/Asuncion

America/Barbados

America/Blanc-Sablon

America/Boa_Vista

America/Campo_Grande

America/Cuiaba

America/Curacao

America/Dominica

America/Eirunepe

America/Glace_Bay

America/Goose_Bay

America/Grenada

America/Guadeloupe

America/Guyana

America/Halifax

America/Kralendijk

America/La_Paz

America/Lower_Princes

America/Manaus

America/Marigot

America/Martinique

America/Moncton

America/Montserrat

America/Port_of_Spain

America/Porto_Acre

America/Porto_Velho

America/Puerto_Rico

America/Rio_Branco

America/Santiago

America/Santo_Domingo

America/St_Barthelemy

America/St_Kitts

America/St_Lucia

America/St_Thomas

America/St_Vincent

America/Thule

America/Tortola

America/Virgin

Antarctica/Palmer

Atlantic/Bermuda

Brazil/Acre

Brazil/West

Canada/Atlantic

Chile/Continental

Etc/GMT+4

PRT

SystemV/AST4

SystemV/AST4ADT

America/St_Johns

CNT

Canada/Newfoundland

AGT

America/Araguaina

America/Argentina/Buenos_Aires

America/Argentina/Catamarca

America/Argentina/ComodRivadavia

America/Argentina/Cordoba

America/Argentina/Jujuy

America/Argentina/La_Rioja

America/Argentina/Mendoza

America/Argentina/Rio_Gallegos

America/Argentina/Salta

America/Argentina/San_Juan

America/Argentina/Tucuman

America/Argentina/Ushuaia

America/Bahia

America/Belem

America/Buenos_Aires

America/Catamarca

America/Cayenne

America/Cordoba

America/Fortaleza

America/Godthab

America/Jujuy

America/Maceio

America/Mendoza

America/Miquelon

America/Montevideo

America/Paramaribo

America/Recife

America/Rosario

America/Santarem

America/Sao_Paulo

Antarctica/Rothera

Atlantic/Stanley

BET

Brazil/East

Etc/GMT+3

America/Noronha

Atlantic/South_Georgia

Brazil/DeNoronha

Etc/GMT+2

America/Scoresbysund

Atlantic/Azores

Atlantic/Cape_Verde

Etc/GMT+1

Africa/Abidjan

Africa/Accra

Africa/Bamako

Africa/Banjul

Africa/Bissau

Africa/Casablanca

Africa/Conakry

Africa/Dakar

Africa/El_Aaiun

Africa/Freetown

Africa/Lome

Africa/Monrovia

Africa/Nouakchott

Africa/Ouagadougou

Africa/Sao_Tome

Africa/Timbuktu

America/Danmarkshavn

Atlantic/Canary

Atlantic/Faeroe

Atlantic/Faroe

Atlantic/Madeira

Atlantic/Reykjavik

Atlantic/St_Helena

Eire

Etc/GMT

Etc/GMT+0

Etc/GMT-0

Etc/GMT0

Etc/Greenwich

Etc/UCT

Etc/UTC

Etc/Universal

Etc/Zulu

Europe/Belfast

Europe/Dublin

Europe/Guernsey

Europe/Isle_of_Man

Europe/Jersey

Europe/Lisbon

Europe/London

GB

GB-Eire

GMT

GMT0

Greenwich

Iceland

Portugal

UCT

UTC

Universal

WET

Zulu

Africa/Algiers

Africa/Bangui

Africa/Brazzaville

Africa/Ceuta

Africa/Douala

Africa/Kinshasa

Africa/Lagos

Africa/Libreville

Africa/Luanda

Africa/Malabo

Africa/Ndjamena

Africa/Niamey

Africa/Porto-Novo

Africa/Tunis

Africa/Windhoek

Arctic/Longyearbyen

Atlantic/Jan_Mayen

CET

ECT

Etc/GMT-1

Europe/Amsterdam

Europe/Andorra

Europe/Belgrade

Europe/Berlin

Europe/Bratislava

Europe/Brussels

Europe/Budapest

Europe/Copenhagen

Europe/Gibraltar

Europe/Ljubljana

Europe/Luxembourg

Europe/Madrid

Europe/Malta

Europe/Monaco

Europe/Oslo

Europe/Paris

Europe/Podgorica

Europe/Prague

Europe/Rome

Europe/San_Marino

Europe/Sarajevo

Europe/Skopje

Europe/Stockholm

Europe/Tirane

Europe/Vaduz

Europe/Vatican

Europe/Vienna

Europe/Warsaw

Europe/Zagreb

Europe/Zurich

MET

Poland

ART

Africa/Blantyre

Africa/Bujumbura

Africa/Cairo

Africa/Gaborone

Africa/Harare

Africa/Johannesburg

Africa/Kigali

Africa/Lubumbashi

Africa/Lusaka

Africa/Maputo

Africa/Maseru

Africa/Mbabane

Africa/Tripoli

Asia/Amman

Asia/Beirut

Asia/Damascus

Asia/Gaza

Asia/Hebron

Asia/Istanbul

Asia/Jerusalem

Asia/Nicosia

Asia/Tel_Aviv

CAT

EET

Egypt

Etc/GMT-2

Europe/Athens

Europe/Bucharest

Europe/Chisinau

Europe/Helsinki

Europe/Istanbul

Europe/Kiev

Europe/Mariehamn

Europe/Nicosia

Europe/Riga

Europe/Simferopol

Europe/Sofia

Europe/Tallinn

Europe/Tiraspol

Europe/Uzhgorod

Europe/Vilnius

Europe/Zaporozhye

Israel

Libya

Turkey

Africa/Addis_Ababa

Africa/Asmara

Africa/Asmera

Africa/Dar_es_Salaam

Africa/Djibouti

Africa/Juba

Africa/Kampala

Africa/Khartoum

Africa/Mogadishu

Africa/Nairobi

Antarctica/Syowa

Asia/Aden

Asia/Baghdad

Asia/Bahrain

Asia/Kuwait

Asia/Qatar

Asia/Riyadh

EAT

Etc/GMT-3

Europe/Kaliningrad

Europe/Minsk

Indian/Antananarivo

Indian/Comoro

Indian/Mayotte

Asia/Riyadh87

Asia/Riyadh88

Asia/Riyadh89

Mideast/Riyadh87

Mideast/Riyadh88

Mideast/Riyadh89

Asia/Tehran

Iran

Asia/Baku

Asia/Dubai

Asia/Muscat

Asia/Tbilisi

Asia/Yerevan

Etc/GMT-4

Europe/Moscow

Europe/Samara

Europe/Volgograd

Indian/Mahe

Indian/Mauritius

Indian/Reunion

NET

W-SU

Asia/Kabul

Antarctica/Mawson

Asia/Aqtau

Asia/Aqtobe

Asia/Ashgabat

Asia/Ashkhabad

Asia/Dushanbe

Asia/Karachi

Asia/Oral

Asia/Samarkand

Asia/Tashkent

Etc/GMT-5

Indian/Kerguelen

Indian/Maldives

PLT

Asia/Calcutta

Asia/Colombo

Asia/Kolkata

IST

Asia/Kathmandu

Asia/Katmandu

Antarctica/Vostok

Asia/Almaty

Asia/Bishkek

Asia/Dacca

Asia/Dhaka

Asia/Qyzylorda

Asia/Thimbu

Asia/Thimphu

Asia/Yekaterinburg

BST

Etc/GMT-6

Indian/Chagos

Asia/Rangoon

Indian/Cocos

Antarctica/Davis

Asia/Bangkok

Asia/Ho_Chi_Minh

Asia/Hovd

Asia/Jakarta

Asia/Novokuznetsk

Asia/Novosibirsk

Asia/Omsk

Asia/Phnom_Penh

Asia/Pontianak

Asia/Saigon

Asia/Vientiane

Etc/GMT-7

Indian/Christmas

VST

Antarctica/Casey

Asia/Brunei

Asia/Choibalsan

Asia/Chongqing

Asia/Chungking

Asia/Harbin

Asia/Hong_Kong

Asia/Kashgar

Asia/Krasnoyarsk

Asia/Kuala_Lumpur

Asia/Kuching

Asia/Macao

Asia/Macau

Asia/Makassar

Asia/Manila

Asia/Shanghai

Asia/Singapore

Asia/Taipei

Asia/Ujung_Pandang

Asia/Ulaanbaatar

Asia/Ulan_Bator

Asia/Urumqi

Australia/Perth

Australia/West

CTT

Etc/GMT-8

Hongkong

PRC

Singapore

Australia/Eucla

Asia/Dili

Asia/Irkutsk

Asia/Jayapura

Asia/Pyongyang

Asia/Seoul

Asia/Tokyo

Etc/GMT-9

JST

Japan

Pacific/Palau

ROK

ACT

Australia/Adelaide

Australia/Broken_Hill

Australia/Darwin

Australia/North

Australia/South

Australia/Yancowinna

AET

Antarctica/DumontDUrville

Asia/Yakutsk

Australia/ACT

Australia/Brisbane

Australia/Canberra

Australia/Currie

Australia/Hobart

Australia/Lindeman

Australia/Melbourne

Australia/NSW

Australia/Queensland

Australia/Sydney

Australia/Tasmania

Australia/Victoria

Etc/GMT-10

Pacific/Chuuk

Pacific/Guam

Pacific/Port_Moresby

Pacific/Saipan

Pacific/Truk

Pacific/Yap

Australia/LHI

Australia/Lord_Howe

Antarctica/Macquarie

Asia/Sakhalin

Asia/Vladivostok

Etc/GMT-11

Pacific/Efate

Pacific/Guadalcanal

Pacific/Kosrae

Pacific/Noumea

Pacific/Pohnpei

Pacific/Ponape

SST

Pacific/Norfolk

Antarctica/McMurdo

Antarctica/South_Pole

Asia/Anadyr

Asia/Kamchatka

Asia/Magadan

Etc/GMT-12

Kwajalein

NST

NZ

Pacific/Auckland

Pacific/Fiji

Pacific/Funafuti

Pacific/Kwajalein

Pacific/Majuro

Pacific/Nauru

Pacific/Tarawa

Pacific/Wake

Pacific/Wallis

NZ-CHAT

Pacific/Chatham

Etc/GMT-13

MIT

Pacific/Apia

Pacific/Enderbury

Pacific/Fakaofo

Pacific/Tongatapu

Etc/GMT-14

Pacific/Kiritimati

다음과 같은 코드로 시간을 획득해서 출력한다.

import java.util.*; import java.text.*; class WorldTime { public static void main( String args[] ) { GregorianCalendar calendar = new GregorianCalendar(); printTime( calendar, "뉴욕", TimeZone.getTimeZone( "America/New_York" ) ); printTime( calendar, "홍콩", TimeZone.getTimeZone( "Asia/Hong_Kong" ) ); printTime( calendar, "파리", TimeZone.getTimeZone( "Europe/Paris" ) ); } public static void printTime( Calendar calendar, String locale, TimeZone timeZone ) { SimpleDateFormat dateFormat = new SimpleDateFormat( "YYYY/MM/dd\t(E)\ta hh:mm" ); dateFormat.setTimeZone( timeZone ); String str = locale + " " + dateFormat.format( calendar.getTime() ); System.out.println( str ); } }

결과는 다음과 같다.

뉴욕 2013/04/21 (일) 오전 11:14

홍콩 2013/04/21 (일) 오후 11:14

파리 2013/04/21 (일) 오후 05:14