Java에서 국가 목록을 찾고 알파벳순으로 정렬하는 방법은 무엇입니까?

게시 됨: 2022-03-06

Java에서 국가 목록을 찾는 방법은 무엇입니까? 아래 질문 중 하나가 있으면 올바른 위치에 있습니다.

Java에서 국가 목록을 얻는 가장 좋은 방법은 무엇입니까?
국가 목록을 올바른 이름으로 알파벳순으로 정렬하는 방법은 무엇입니까?

시작하자:

Java 클래스 CrunchifyListOfCountries.java를 만듭니다.
아래 코드를 파일에 넣습니다.

다음은 논리입니다.

Cloneable 및 Serializable 인터페이스를 구현하는 Locale 클래스를 사용합니다.
Locale 클래스는 API 목록을 제공하며 getCountry() 및 getDisplayCountry() 를 반복하여 모든 국가 및 코드 목록을 가져옵니다.
다음 메서드 getCountriesListInAlphabetical()에서는 List 및 ListIterator 메서드를 사용하여 반복하고 sort() 메서드를 사용하여 목록을 알파벳 순서로 정렬합니다.

package crunchify . com . java . tutorials ;

import java . util . * ;

/**

* @author Crunchify.com

* Program: In Java how to find list of Countries?

* How to get countries list alphabetically arranged with the correct names?

public class CrunchifyListOfCountries {

public static void main ( String [ ] args ) {

CrunchifyListOfCountries crunchifyObj = new CrunchifyListOfCountries ( ) ;

crunchifyObj . run ( ) ;

}

public void run ( ) {

// getISOCountries: Returns a list of all 2-letter country codes defined in ISO 3166. Can be used to create Locales.

// This method is equivalent to getISOCountries(Locale.IsoCountryCode type) with type Locale.IsoCountryCode.PART1_ALPHA2.

// Note: The Locale class also supports other codes for country (region),

// such as 3-letter numeric UN M.49 area codes.

// Therefore, the list returned by this method does not contain ALL valid codes that can be used to create Locales.

String [ ] crunchifyLocales = Locale . getISOCountries ( ) ;

for ( String crunchifyCountry : crunchifyLocales ) {

// Locale: A Locale object represents a specific geographical, political, or cultural region.

// An operation that requires a Locale to perform its task is called locale-sensitive and uses the Locale to tailor information for the user.

// For example, displaying a number is a locale-sensitive operation— the number should be formatted

// according to the customs and conventions of the user's native country, region, or culture.

Locale crunchifyObj = new Locale ( "" , crunchifyCountry ) ;

System . out . println ( "Here is a Country Code = " + crunchifyObj . getCountry ( )

+ " \t Country Name = " + crunchifyObj . getDisplayCountry ( ) ) ;

}

System . out . println ( "\n\nCountry List in Alphabetical Order:\n" ) ;

getCountriesListInAlphabetical ( ) ;

System . out . println ( "CrunchifyListOfCountries Finished..." ) ;

}

// Country List in Alphabetical Order

public void getCountriesListInAlphabetical ( ) {

List < String > crunchifyList = new ArrayList < String > ( ) ;

String [ ] locales = Locale . getISOCountries ( ) ;

for ( String countryCode : locales ) {

Locale obj = new Locale ( "" , countryCode ) ;

crunchifyList . add ( obj . getDisplayCountry ( ) ) ;

}

// sort(): Sorts the specified list into ascending order,

// according to the natural ordering of its elements.

// All elements in the list must implement the Comparable interface. Furthermore,

// all elements in the list must be mutually comparable

// (that is, e1.compareTo(e2) must not throw a ClassCastException for any elements e1 and e2 in the list).

Collections . sort ( crunchifyList ) ;

// listIterator(): Returns a list iterator over the elements in this list (in proper sequence).

ListIterator < String > crunchifyListIterator = crunchifyList . listIterator ( ) ;

while ( crunchifyListIterator . hasNext ( ) ) {

// next(): Returns the next element in the list and advances the cursor position. This method may be called repeatedly to iterate through the list, or intermixed with calls to previous to go back and forth.

// (Note that alternating calls to next and previous will return the same element repeatedly.)

System . out . println ( crunchifyListIterator . next ( ) ) ;

}

위의 프로그램을 Java Application으로 실행하면 아래와 같은 결과를 볼 수 있습니다.

IntelliJ IDEA 결과:

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Here is a Country Code = SB Country Name = Solomon Islands

Here is a Country Code = SC Country Name = Seychelles

Here is a Country Code = SD Country Name = Sudan

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Here is a Country Code = SI Country Name = Slovenia

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Here is a Country Code = SS Country Name = South Sudan

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Here is a Country Code = UG Country Name = Uganda

Here is a Country Code = UM Country Name = U . S . Outlying Islands

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Here is a Country Code = UY Country Name = Uruguay

Here is a Country Code = UZ Country Name = Uzbekistan

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Here is a Country Code = VC Country Name = St . Vincent & Grenadines

Here is a Country Code = VE Country Name = Venezuela

Here is a Country Code = VG Country Name = British Virgin Islands

Here is a Country Code = VI Country Name = U . S . Virgin Islands

Here is a Country Code = VN Country Name = Vietnam

Here is a Country Code = VU Country Name = Vanuatu

Here is a Country Code = WF Country Name = Wallis & Futuna

Here is a Country Code = WS Country Name = Samoa

Here is a Country Code = YE Country Name = Yemen

Here is a Country Code = YT Country Name = Mayotte

Here is a Country Code = ZA Country Name = South Africa

Here is a Country Code = ZM Country Name = Zambia

Here is a Country Code = ZW Country Name = Zimbabwe

Country List in Alphabetical Order :

Afghanistan

Albania

Algeria

American Samoa

Andorra

Angola

Anguilla

Antarctica

Antigua & Barbuda

Argentina

Armenia

Aruba

Australia

Austria

Azerbaijan

Bahamas

Bahrain

Bangladesh

Barbados

Belarus

Belgium

Belize

Benin

Bermuda

Bhutan

Bolivia

Bosnia & Herzegovina

Botswana

Bouvet Island

Brazil

British Indian Ocean Territory

British Virgin Islands

Brunei

Bulgaria

Burkina Faso

Burundi

Cambodia

Cameroon

Canada

Cape Verde

Caribbean Netherlands

Cayman Islands

Central African Republic

Chad

Chile

China

Christmas Island

Cocos ( Keeling ) Islands

Colombia

Comoros

Congo - Brazzaville

Congo - Kinshasa

Cook Islands

Costa Rica

Croatia

Cuba

Cura c ao

Cyprus

Czechia

C o te d ’ Ivoire

Denmark

Djibouti

Dominica

Dominican Republic

Ecuador

Egypt

El Salvador

Equatorial Guinea

Eritrea

Estonia

Eswatini

Ethiopia

Falkland Islands

Faroe Islands

Fiji

Finland

France

French Guiana

French Polynesia

French Southern Territories

Gabon

Gambia

Georgia

Germany

Ghana

Gibraltar

Greece

Greenland

Grenada

Guadeloupe

Guam

Guatemala

Guernsey

Guinea

Guinea - Bissau

Guyana

Haiti

Heard & McDonald Islands

Honduras

Hong Kong SAR China

Hungary

Iceland

India

Indonesia

Iran

Iraq

Ireland

Isle of Man

Israel

Italy

Jamaica

Japan

Jersey

Jordan

Kazakhstan

Kenya

Kiribati

Kuwait

Kyrgyzstan

Laos

Latvia

Lebanon

Lesotho

Liberia

. . .

And so on . . . .

CrunchifyListOfCountries Finished . . .

Process finished with exit code 0

위 프로그램을 실행하는 데 문제가 있으면 알려주십시오.

즐거운 코딩.