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70 lines (49 loc) · 1.52 KB
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package basic.c05_structures;
/*
Clase 42 - Sets
Vídeo: https://youtu.be/JOAqpdM36wI?t=13502
*/
import java.util.HashSet;
public class Sets {
public static void main(String[] args) {
// Declaración y creación
HashSet<String> names = new HashSet<>();
var numbers = new HashSet<Integer>();
// Tamaño
System.out.println(names.size());
// Inserción
names.add("Brais");
names.add("Moure");
names.add("MoureDev");
names.add("mouredev@gmail.com");
System.out.println(names.size());
System.out.println(names);
numbers.add(1);
numbers.add(2);
numbers.add(3);
// Eliminación
names.remove("Brais");
System.out.println(names.size());
// Búsqueda
System.out.println(names.contains("Brais"));
System.out.println(names.contains("mouredev@gmail.com"));
System.out.println(names);
names.add("Moure");
names.add("Moure");
names.add("Moure");
System.out.println(names);
// Conjuntos
// names.addAll(numbers); Error
var countries = new HashSet<String>();
countries.add("España");
countries.add("México");
countries.add("Argentina");
countries.add("MoureDev");
names.addAll(countries);
System.out.println(names);
names.removeAll(countries);
System.out.println(names);
names.retainAll(countries);
System.out.println(names);
}
}