public static void main(String[] args) {
Map<String, Pet> petMap = new HashMap<String, Pet>();
petMap.put("My Cat", new Cat("Molly"));
petMap.put("My Dog", new Dog("Ginger"));
petMap.put("My Hamster", new Hamster("Bosco"));
print(petMap);
Pet dog = petMap.get("My Dog");
print(dog);
print(petMap.containsKey("My Dog"));
print(petMap.containsValue(dog));
}
public class Countries {
public static final String[][] DATA = {
// Africa
{"ALGERIA", "Algiers"},
{"ANGOLA", "Luanda"},
{"BENIN", "Porto-Novo"},
{"BOTSWANA", "Gaberone"},
{"BURKINA FASO", "Ouagadougou"},
{"BURUNDI", "Bujumbura"},
{"CAMEROON", "Yaounde"},
{"CAPE VERDE", "Praia"},
{"CENTRAL AFRICAN REPUBLIC", "Bangui"},
{"CHAD", "N'djamena"},
{"COMOROS", "Moroni"},
{"CONGO", "Brazzaville"},
{"DJIBOUTI", "Dijibouti"},
{"EGYPT", "Cairo"},
{"EQUATORIAL GUINEA", "Malabo"},
{"ERITREA", "Asmara"},
{"ETHIOPIA", "Addis Ababa"},
{"GABON", "Libreville"},
{"THE GAMBIA", "Banjul"},
{"GHANA", "Accra"},
{"GUINEA", "Conakry"},
{"BISSAU", "Bissau"},
{"COTE D'IVOIR (IVORY COAST)", "Yamoussoukro"},
{"KENYA", "Nairobi"},
{"LESOTHO", "Maseru"},
{"LIBERIA", "Monrovia"},
{"LIBYA", "Tripoli"},
{"MADAGASCAR", "Antananarivo"},
{"MALAWI", "Lilongwe"},
{"MALI", "Bamako"},
{"MAURITANIA", "Nouakchott"},
{"MAURITIUS", "Port Louis"},
{"MOROCCO", "Rabat"},
{"MOZAMBIQUE", "Maputo"},
{"NAMIBIA", "Windhoek"},
{"NIGER", "Niamey"},
{"NIGERIA", "Abuja"},
{"RWANDA", "Kigali"},
{"SAO TOME E PRINCIPE", "Sao Tome"},
{"SENEGAL", "Dakar"},
{"SEYCHELLES", "Victoria"},
{"SIERRA LEONE", "Freetown"},
{"SOMALIA", "Mogadishu"},
{"SOUTH AFRICA", "Pretoria/Cape Town"},
{"SUDAN", "Khartoum"},
{"SWAZILAND", "Mbabane"},
{"TANZANIA", "Dodoma"},
{"TOGO", "Lome"},
{"TUNISIA", "Tunis"},
{"UGANDA", "Kampala"},
{"DEMOCRATIC REPUBLIC OF THE CONGO (ZAIRE)", "Kinshasa"},
{"ZAMBIA", "Lusaka"},
{"ZIMBABWE", "Harare"},
// Asia
{"AFGHANISTAN", "Kabul"},
{"BAHRAIN", "Manama"},
{"BANGLADESH", "Dhaka"},
{"BHUTAN", "Thimphu"},
{"BRUNEI", "Bandar Seri Begawan"},
{"CAMBODIA", "Phnom Penh"},
{"CHINA", "Beijing"},
{"CYPRUS", "Nicosia"},
{"INDIA", "New Delhi"},
{"INDONESIA", "Jakarta"},
{"IRAN", "Tehran"},
{"IRAQ", "Baghdad"},
{"ISRAEL", "Jerusalem"},
{"JAPAN", "Tokyo"},
{"JORDAN", "Amman"},
{"KUWAIT", "Kuwait City"},
{"LAOS", "Vientiane"},
{"LEBANON", "Beirut"},
{"MALAYSIA", "Kuala Lumpur"},
{"THE MALDIVES", "Male"},
{"MONGOLIA", "Ulan Bator"},
{"MYANMAR (BURMA)", "Rangoon"},
{"NEPAL", "Katmandu"},
{"NORTH KOREA", "P'yongyang"},
{"OMAN", "Muscat"},
{"PAKISTAN", "Islamabad"},
{"PHILIPPINES", "Manila"},
{"QATAR", "Doha"},
{"SAUDI ARABIA", "Riyadh"},
{"SINGAPORE", "Singapore"},
{"SOUTH KOREA", "Seoul"},
{"SRI LANKA", "Colombo"},
{"SYRIA", "Damascus"},
{"TAIWAN (REPUBLIC OF CHINA)", "Taipei"},
{"THAILAND", "Bangkok"},
{"TURKEY", "Ankara"},
{"UNITED ARAB EMIRATES", "Abu Dhabi"},
{"VIETNAM", "Hanoi"},
{"YEMEN", "Sana'a"},
// Australia and Oceania
{"AUSTRALIA", "Canberra"},
{"FIJI", "Suva"},
{"KIRIBATI", "Bairiki"},
{"MARSHALL ISLANDS", "Dalap-Uliga-Darrit"},
{"MICRONESIA", "Palikir"},
{"NAURU", "Yaren"},
{"NEW ZEALAND", "Wellington"},
{"PALAU", "Koror"},
{"PAPUA NEW GUINEA", "Port Moresby"},
{"SOLOMON ISLANDS", "Honaira"},
{"TONGA", "Nuku'alofa"},
{"TUVALU", "Fongafale"},
{"VANUATU", "< Port-Vila"},
{"WESTERN SAMOA", "Apia"},
// Eastern Europe and former USSR
{"ARMENIA", "Yerevan"},
{"AZERBAIJAN", "Baku"},
{"BELARUS (BYELORUSSIA)", "Minsk"},
{"BULGARIA", "Sofia"},
{"GEORGIA", "Tbilisi"},
{"KAZAKSTAN", "Almaty"},
{"KYRGYZSTAN", "Alma-Ata"},
{"MOLDOVA", "Chisinau"},
{"RUSSIA", "Moscow"},
{"TAJIKISTAN", "Dushanbe"},
{"TURKMENISTAN", "Ashkabad"},
{"UKRAINE", "Kyiv"},
{"UZBEKISTAN", "Tashkent"},
// Europe
{"ALBANIA", "Tirana"},
{"ANDORRA", "Andorra la Vella"},
{"AUSTRIA", "Vienna"},
{"BELGIUM", "Brussels"},
{"BOSNIA", "-"},
{"HERZEGOVINA", "Sarajevo"},
{"CROATIA", "Zagreb"},
{"CZECH REPUBLIC", "Prague"},
{"DENMARK", "Copenhagen"},
{"ESTONIA", "Tallinn"},
{"FINLAND", "Helsinki"},
{"FRANCE", "Paris"},
{"GERMANY", "Berlin"},
{"GREECE", "Athens"},
{"HUNGARY", "Budapest"},
{"ICELAND", "Reykjavik"},
{"IRELAND", "Dublin"},
{"ITALY", "Rome"},
{"LATVIA", "Riga"},
{"LIECHTENSTEIN", "Vaduz"},
{"LITHUANIA", "Vilnius"},
{"LUXEMBOURG", "Luxembourg"},
{"MACEDONIA", "Skopje"},
{"MALTA", "Valletta"},
{"MONACO", "Monaco"},
{"MONTENEGRO", "Podgorica"},
{"THE NETHERLANDS", "Amsterdam"},
{"NORWAY", "Oslo"},
{"POLAND", "Warsaw"},
{"PORTUGAL", "Lisbon"},
{"ROMANIA", "Bucharest"},
{"SAN MARINO", "San Marino"},
{"SERBIA", "Belgrade"},
{"SLOVAKIA", "Bratislava"},
{"SLOVENIA", "Ljuijana"},
{"SPAIN", "Madrid"},
{"SWEDEN", "Stockholm"},
{"SWITZERLAND", "Berne"},
{"UNITED KINGDOM", "London"},
{"VATICAN CITY", "---"},
// North and Central America
{"ANTIGUA AND BARBUDA", "Saint John's"},
{"BAHAMAS", "Nassau"},
{"BARBADOS", "Bridgetown"},
{"BELIZE", "Belmopan"},
{"CANADA", "Ottawa"},
{"COSTA RICA", "San Jose"},
{"CUBA", "Havana"},
{"DOMINICA", "Roseau"},
{"DOMINICAN REPUBLIC", "Santo Domingo"},
{"EL SALVADOR", "San Salvador"},
{"GRENADA", "Saint George's"},
{"GUATEMALA", "Guatemala City"},
{"HAITI", "Port-au-Prince"},
{"HONDURAS", "Tegucigalpa"},
{"JAMAICA", "Kingston"},
{"MEXICO", "Mexico City"},
{"NICARAGUA", "Managua"},
{"PANAMA", "Panama City"},
{"ST. KITTS", "-"},
{"NEVIS", "Basseterre"},
{"ST. LUCIA", "Castries"},
{"ST. VINCENT AND THE GRENADINES", "Kingstown"},
{"UNITED STATES OF AMERICA", "Washington, D.C."},
// South America
{"ARGENTINA", "Buenos Aires"},
{"BOLIVIA", "Sucre (legal)/La Paz(administrative)"},
{"BRAZIL", "Brasilia"},
{"CHILE", "Santiago"},
{"COLOMBIA", "Bogota"},
{"ECUADOR", "Quito"},
{"GUYANA", "Georgetown"},
{"PARAGUAY", "Asuncion"},
{"PERU", "Lima"},
{"SURINAME", "Paramaribo"},
{"TRINIDAD AND TOBAGO", "Port of Spain"},
{"URUGUAY", "Montevideo"},
{"VENEZUELA", "Caracas"},
};
// Use AbstractMap by implementing entrySet()
private static class FlyweightMap extends AbstractMap<String, String> {
private static class Entry implements Map.Entry<String, String> {
int index;
Entry(int index) {
this.index = index;
}
public boolean equals(Object o) {
return DATA[index][0].equals(o);
}
public String getKey() {
return DATA[index][0];
}
public String getValue() {
return DATA[index][1];
}
public String setValue(String value) {
throw new UnsupportedOperationException();
}
public int hashCode() {
return DATA[index][0].hashCode();
}
}
// Use AbstractSet by implementing size() & iterator()
static class EntrySet extends AbstractSet<Map.Entry<String, String>> {
private int size;
EntrySet(int size) {
if (size < 0) this.size = 0;
// Can't be any bigger than the array:
else if (size > DATA.length) this.size = DATA.length;
else this.size = size;
}
public int size() {
return size;
}
private class Iter implements Iterator<Map.Entry<String, String>> {
// Only one Entry object per Iterator:
private Entry entry = new Entry(-1);
public boolean hasNext() {
return entry.index < size - 1;
}
public Map.Entry<String, String> next() {
entry.index++;
return entry;
}
public void remove() {
throw new UnsupportedOperationException();
}
}
public Iterator<Map.Entry<String, String>> iterator() {
return new Iter();
}
}
private static Set<Map.Entry<String, String>> entries = new EntrySet(DATA.length);
public Set<Map.Entry<String, String>> entrySet() {
return entries;
}
}
// Create a partial map of 'size' countries:
static Map<String, String> select(final int size) {
return new FlyweightMap() {
public Set<Map.Entry<String, String>> entrySet() {
return new EntrySet(size);
}
};
}
static Map<String, String> map = new FlyweightMap();
public static Map<String, String> capitals() {
return map; // The entire map
}
public static Map<String, String> capitals(int size) {
return select(size); // A partial map
}
static List<String> names = new ArrayList<String>(map.keySet());
// All the names:
public static List<String> names() {
return names;
}
// A partial list:
public static List<String> names(int size) {
return new ArrayList<String>(select(size).keySet());
}
public static void main(String[] args) {
print(capitals(10));
print(names(10));
print(new HashMap<String, String>(capitals(3)));
print(new LinkedHashMap<String, String>(capitals(3)));
print(new TreeMap<String, String>(capitals(3)));
print(new Hashtable<String, String>(capitals(3)));
print(new HashSet<String>(names(6)));
print(new LinkedHashSet<String>(names(6)));
print(new TreeSet<String>(names(6)));
print(new ArrayList<String>(names(6)));
print(new LinkedList<String>(names(6)));
print(capitals().get("BRAZIL"));
}
} /*
