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  1. // package seupackage.
  2.  
  3. import java.util.Arrays;
  4. import java.util.LinkedHashSet;
  5. import java.util.Set;
  6.  
  7. public class Main {
  8.  
  9.     public static class Party {
  10.  
  11.         private final Set<String> players;
  12.  
  13.         public Party() {
  14.             this.players = new LinkedHashSet<>();
  15.         }
  16.  
  17.         public void toggle(String player) {
  18.             if (players.contains(player)) {
  19.                 players.remove(player);
  20.             } else {
  21.                 players.add(player);
  22.             }
  23.         }
  24.  
  25.         public String[] toArray() {
  26.            return players.toArray(new String[players.size()]);
  27.         }
  28.  
  29.         public Set<String> toSet() {
  30.             return new LinkedHashSet<>(players);
  31.         }
  32.     }
  33.  
  34.     public static void main(String[] args) {
  35.         Party p = new Party();
  36.         p.toggle("Pedro"); // Adiciona o Pedro
  37.         System.out.println(Arrays.asList(p.toArray())); // Imprime [Pedro]
  38.         p.toggle("Maria"); // Adiciona a Maria
  39.         System.out.println(Arrays.asList(p.toArray())); // Imprime [Pedro, Maria]
  40.         p.toggle("Pedro"); // Remove o Pedro
  41.         System.out.println(Arrays.asList(p.toArray())); // Imprime [Maria]
  42.         p.toggle("Carlos"); // Adiciona o Carlos
  43.         p.toggle("Fernando"); // Adiciona o Fernando
  44.         System.out.println(p.toSet()); // Imprime [Maria, Carlos, Fernando]
  45.         p.toggle("Carlos"); // Remove o Carlos
  46.         System.out.println(p.toSet()); // Imprime [Maria, Fernando]
  47.    }
  48. }
Success #stdin #stdout 0.1s 320320KB
comments (?)
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Standard input is empty
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[Pedro]
[Pedro, Maria]
[Maria]
[Maria, Carlos, Fernando]
[Maria, Fernando]
https://ideone.com/qzVwzi
language:
Java (HotSpot 12)
created:
9 years ago
visibility:
public

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