How to Get List of All Country Codes in Java Using Locale Class

   /**
     * Method to get a sorted map of country names and their
     * ISO 3166 Country Codes
     * 
     * @return Treemap of <Country,Country Code>
     */
    public Map<String,String> getCountryCodeDetails() {

        Map<String, String> mapOfCountryAndCodes = new TreeMap();
        String[] countriesLocaleArr = Locale.getISOCountries();

        for (String countryCode : countriesLocaleArr) {

            Locale locale = new Locale("en", countryCode);
            mapOfCountryAndCodes.put(locale.getCountry(), locale.getDisplayCountry());

        }
       return mapOfCountryAndCodes;

    }

Example:

Map<String,String> countryCodeMap = countryCodes.getCountryCodeDetails();
countryCodeMap.forEach((code, country) -> System.out.println((code + ": " + country)));

Output List:

AD: Andorra
AE: United Arab Emirates
AF: Afghanistan
AG: Antigua & Barbuda
AI: Anguilla
AL: Albania
AM: Armenia
AN: Netherlands Antilles
AO: Angola
AQ: Antarctica
AR: Argentina
AS: American Samoa
AT: Austria
AU: Australia
AW: Aruba
AX: Åland Islands
AZ: Azerbaijan
BA: Bosnia & Herzegovina
BB: Barbados
BD: Bangladesh
BE: Belgium
BF: Burkina Faso
BG: Bulgaria
BH: Bahrain
BI: Burundi
BJ: Benin
BL: St. Barthélemy
BM: Bermuda
BN: Brunei
BO: Bolivia
BQ: Caribbean Netherlands
BR: Brazil
BS: Bahamas
BT: Bhutan
BV: Bouvet Island
BW: Botswana
BY: Belarus
BZ: Belize
CA: Canada
CC: Cocos (Keeling) Islands
CD: Congo - Kinshasa
CF: Central African Republic
CG: Congo - Brazzaville
CH: Switzerland
CI: Côte d’Ivoire
CK: Cook Islands
CL: Chile
CM: Cameroon
CN: China
CO: Colombia
CR: Costa Rica
CU: Cuba
CV: Cape Verde
CW: Curaçao
CX: Christmas Island
CY: Cyprus
CZ: Czechia
DE: Germany
DJ: Djibouti
DK: Denmark
DM: Dominica
DO: Dominican Republic
DZ: Algeria
EC: Ecuador
EE: Estonia
EG: Egypt
EH: Western Sahara
ER: Eritrea
ES: Spain
ET: Ethiopia
FI: Finland
FJ: Fiji
FK: Falkland Islands
FM: Micronesia
FO: Faroe Islands
FR: France
GA: Gabon
GB: United Kingdom
GD: Grenada
GE: Georgia
GF: French Guiana
GG: Guernsey
GH: Ghana
GI: Gibraltar
GL: Greenland
GM: Gambia
GN: Guinea
GP: Guadeloupe
GQ: Equatorial Guinea
GR: Greece
GS: South Georgia & South Sandwich Islands
GT: Guatemala
GU: Guam
GW: Guinea-Bissau
GY: Guyana
HK: Hong Kong SAR China
HM: Heard & McDonald Islands
HN: Honduras
HR: Croatia
HT: Haiti
HU: Hungary
ID: Indonesia
IE: Ireland
IL: Israel
IM: Isle of Man
IN: India
IO: British Indian Ocean Territory
IQ: Iraq
IR: Iran
IS: Iceland
IT: Italy
JE: Jersey
JM: Jamaica
JO: Jordan
JP: Japan
KE: Kenya
KG: Kyrgyzstan
KH: Cambodia
KI: Kiribati
KM: Comoros
KN: St. Kitts & Nevis
KP: North Korea
KR: South Korea
KW: Kuwait
KY: Cayman Islands
KZ: Kazakhstan
LA: Laos
LB: Lebanon
LC: St. Lucia
LI: Liechtenstein
LK: Sri Lanka
LR: Liberia
LS: Lesotho
LT: Lithuania
LU: Luxembourg
LV: Latvia
LY: Libya
MA: Morocco
MC: Monaco
MD: Moldova
ME: Montenegro
MF: St. Martin
MG: Madagascar
MH: Marshall Islands
MK: North Macedonia
ML: Mali
MM: Myanmar (Burma)
MN: Mongolia
MO: Macao SAR China
MP: Northern Mariana Islands
MQ: Martinique
MR: Mauritania
MS: Montserrat
MT: Malta
MU: Mauritius
MV: Maldives
MW: Malawi
MX: Mexico
MY: Malaysia
MZ: Mozambique
NA: Namibia
NC: New Caledonia
NE: Niger
NF: Norfolk Island
NG: Nigeria
NI: Nicaragua
NL: Netherlands
NO: Norway
NP: Nepal
NR: Nauru
NU: Niue
NZ: New Zealand
OM: Oman
PA: Panama
PE: Peru
PF: French Polynesia
PG: Papua New Guinea
PH: Philippines
PK: Pakistan
PL: Poland
PM: St. Pierre & Miquelon
PN: Pitcairn Islands
PR: Puerto Rico
PS: Palestinian Territories
PT: Portugal
PW: Palau
PY: Paraguay
QA: Qatar
RE: Réunion
RO: Romania
RS: Serbia
RU: Russia
RW: Rwanda
SA: Saudi Arabia
SB: Solomon Islands
SC: Seychelles
SD: Sudan
SE: Sweden
SG: Singapore
SH: St. Helena
SI: Slovenia
SJ: Svalbard & Jan Mayen
SK: Slovakia
SL: Sierra Leone
SM: San Marino
SN: Senegal
SO: Somalia
SR: Suriname
SS: South Sudan
ST: São Tomé & Príncipe
SV: El Salvador
SX: Sint Maarten
SY: Syria
SZ: Eswatini
TC: Turks & Caicos Islands
TD: Chad
TF: French Southern Territories
TG: Togo
TH: Thailand
TJ: Tajikistan
TK: Tokelau
TL: Timor-Leste
TM: Turkmenistan
TN: Tunisia
TO: Tonga
TR: Turkey
TT: Trinidad & Tobago
TV: Tuvalu
TW: Taiwan
TZ: Tanzania
UA: Ukraine
UG: Uganda
UM: U.S. Outlying Islands
US: United States
UY: Uruguay
UZ: Uzbekistan
VA: Vatican City
VC: St. Vincent & Grenadines
VE: Venezuela
VG: British Virgin Islands
VI: U.S. Virgin Islands
VN: Vietnam
VU: Vanuatu
WF: Wallis & Futuna
WS: Samoa
YE: Yemen
YT: Mayotte
ZA: South Africa
ZM: Zambia
ZW: Zimbabwe

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