hello-java/basic/c05_structures/Sets.java at main · mouredev/hello-java · GitHub

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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");

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);

}

hello-java/basic/c05_structures/Sets.java at main · mouredev/hello-java · GitHub

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