(HashSet) Решение задачи 5.

src/com/school/faang/hashset/задача_5/Solution.java

@@ -1,7 +1,87 @@
 package com.school.faang.hashset.задача_5;
 
+import java.util.ArrayList;
+import java.util.Objects;
+import java.util.HashSet;
+import java.util.List;
+
 public class Solution {
-    public static void main(String[] args) {
+    static class Player {
+        private String nickname;
+        private String status;
+
+        public Player(String nickname, String status) {
+            this.nickname = nickname;
+            this.status = status;
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hash(nickname);
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (o == null) {
+                return false;
+            }
+            Player player = (Player) o;
+
+            return nickname.equals(player.nickname);
+        }
+
+        String getNickname() {
+            return nickname;
+        }
+
+        String getStatus() {
+            return status;
+        }
+    }
 
+    static class GameLobby {
+        private HashSet<Player> players;
+        private List<Player> playerJoinOrder;
+
+        public GameLobby(HashSet<String> players, ArrayList<Player> playerJoinOrder) {
+            this.players = new HashSet<>();
+            this.playerJoinOrder = new ArrayList<>();
+        }
+
+        void addPlayer(String nickname) {
+            Player player = new Player(nickname, "Не готов");
+            if (players.add(player)) {
+                playerJoinOrder.add(player);
+            }
+        }
+
+        void removePlayer(String nickname) {
+            Player player = new Player(nickname, "Не готов");
+            players.remove(player);
+            playerJoinOrder.remove(player);
+        }
+
+        boolean hasPlayer(String nickname) {
+            Player player = new Player(nickname, "Не готов");
+            return playerJoinOrder.contains(player);
+        }
+
+        void displayPlayers() {
+            for (Player player : playerJoinOrder) {
+                System.out.println(player.getNickname() + " " + player.getStatus());
+            }
+        }
+    }
+
+    public static void main(String[] args) {
+        GameLobby lobby = new GameLobby(new HashSet<>(), new ArrayList<Player>());
+        lobby.addPlayer("gellivar");
+        lobby.addPlayer("jeenek");
+        lobby.addPlayer("S1mple");
+        lobby.addPlayer("doggy");
+        lobby.addPlayer("gellivar");
+        lobby.displayPlayers();
+        lobby.removePlayer("jeenek");
+        lobby.displayPlayers();
     }
 }