Solved Issue with putting player name and scoreboard into hashmap.

I have been trying to put a player name and a scoreboard into a hashmap, and when i do i am confronted with an NPE. i am very agitated at this point.

putting name into HashMap:

Code:

@EventHandler
      public void onJoin(PlayerJoinEvent e){
          Player player = e.getPlayer(); //Save the player
          String name = player.getName();
  
       
          ScoreboardManager manager = Bukkit.getScoreboardManager();
          Scoreboard board = manager.getNewScoreboard();
          Objective objective = board.registerNewObjective("RankUp Info", "dummy");
          objective.setDisplaySlot(DisplaySlot.SIDEBAR);
          objective.setDisplayName(ChatColor.AQUA + "Simple Society");
          Score score = objective.getScore(Bukkit.getOfflinePlayer(ChatColor.GREEN + "Current Rank: " + plugin.perms.getPrimaryGroup(player)));
          score.setScore(0);
          player.setScoreboard(board);
        boards.put(name, board);
      }

NPE:

Code:

21.10 18:03:10 [Server] INFO ... 14 more
21.10 18:03:10 [Server] INFO at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot-1.8.7.jar:git-Spigot-b2c2c63-a3cb1bc]
21.10 18:03:10 [Server] INFO at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_40]
21.10 18:03:10 [Server] INFO at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_40]
21.10 18:03:10 [Server] INFO at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_40]
21.10 18:03:10 [Server] INFO at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_40]
21.10 18:03:10 [Server] INFO at Listeners.JoinListener.onJoin(JoinListener.java:41) ~[?:?]
21.10 18:03:10 [Server] INFO Caused by: java.lang.NullPointerException
21.10 18:03:10 [Server] INFO at java.lang.Thread.run(Thread.java:745) [?:1.8.0_40]
21.10 18:03:10 [Server] INFO at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:556) [spigot-1.8.7.jar:git-Spigot-b2c2c63-a3cb1bc]
21.10 18:03:10 [Server] INFO at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:653) [spigot-1.8.7.jar:git-Spigot-b2c2c63-a3cb1bc]
21.10 18:03:10 [Server] INFO at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [spigot-1.8.7.jar:git-Spigot-b2c2c63-a3cb1bc]
21.10 18:03:10 [Server] INFO at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:813) [spigot-1.8.7.jar:git-Spigot-b2c2c63-a3cb1bc]
21.10 18:03:10 [Server] INFO at net.minecraft.server.v1_8_R3.ServerConnection.c(ServerConnection.java:148) [spigot-1.8.7.jar:git-Spigot-b2c2c63-a3cb1bc]
21.10 18:03:10 [Server] INFO at net.minecraft.server.v1_8_R3.NetworkManager.a(NetworkManager.java:231) [spigot-1.8.7.jar:git-Spigot-b2c2c63-a3cb1bc]
21.10 18:03:10 [Server] INFO at net.minecraft.server.v1_8_R3.LoginListener.c(LoginListener.java:54) [spigot-1.8.7.jar:git-Spigot-b2c2c63-a3cb1bc]
21.10 18:03:10 [Server] INFO at net.minecraft.server.v1_8_R3.LoginListener.b(LoginListener.java:144) [spigot-1.8.7.jar:git-Spigot-b2c2c63-a3cb1bc]
21.10 18:03:10 [Server] INFO at net.minecraft.server.v1_8_R3.PlayerList.a(PlayerList.java:157) [spigot-1.8.7.jar:git-Spigot-b2c2c63-a3cb1bc]
21.10 18:03:10 [Server] INFO at net.minecraft.server.v1_8_R3.PlayerList.onPlayerJoin(PlayerList.java:298) [spigot-1.8.7.jar:git-Spigot-b2c2c63-a3cb1bc]
21.10 18:03:10 [Server] INFO at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot-1.8.7.jar:git-Spigot-b2c2c63-a3cb1bc]
21.10 18:03:10 [Server] INFO at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot-1.8.7.jar:git-Spigot-b2c2c63-a3cb1bc]
21.10 18:03:10 [Server] INFO at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot-1.8.7.jar:git-Spigot-b2c2c63-a3cb1bc]
21.10 18:03:10 [Server] INFO at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[spigot-1.8.7.jar:git-Spigot-b2c2c63-a3cb1bc]
21.10 18:03:10 [Server] INFO org.bukkit.event.EventException

 

@nick6899 You marked this as solved. Could you provide how you solved it for future reference of anyone wanting to do the same thing?

 

@henderry2019
I expect he forgot to initialize the HashMap.

 

Lol, Adam is right. I feel completely stupid.