Solved Scoreboard won't show up

Hello!
Why is this not show up in the game?

Form an another class, i call this "ScoreBoards" and the scoreboard isn't show up.

Code:

public class ScoreBoards implements Listener{

   public static Team players = null;
   public static void registerScoreBoard(){
     
     ScoreboardManager manager = Bukkit.getScoreboardManager();
     Scoreboard sBoard = manager.getNewScoreboard();
     Objective obj = sBoard.registerNewObjective("test", "health");
     obj.setDisplaySlot(DisplaySlot.SIDEBAR);
     obj.setDisplayName("Players");
     players = sBoard.registerNewTeam("players");
     players.setPrefix(ChatColor.RED + "");
     for(Player p : Bukkit.getOnlinePlayers()){
       
       players.addPlayer(p);
       p.setScoreboard(sBoard);
       
     }
     
   }
}

Thanks!

 

I think that the scoreboard isn't showing up, because you first need to set a score, or the scores needs to be updated

 

And this?

Code:

public class ScoreBoards implements Listener{
public static ArrayList<Player> uhcplayers;
   public static Team players = null;
   public static void getUHCPlayers(ArrayList<Player> players){//This is from an another class
     
     uhcplayers = players;
     registerScoreBoard();
   }
   public static void registerScoreBoard(){
     
     ScoreboardManager manager = Bukkit.getScoreboardManager();
     Scoreboard sBoard = manager.getNewScoreboard();
     Objective obj = sBoard.registerNewObjective("test", "health");
     obj.setDisplaySlot(DisplaySlot.SIDEBAR);
     obj.setDisplayName("Players");
     players = sBoard.registerNewTeam("players");
     players.setPrefix(ChatColor.RED + "");
     for(Player p : uhcplayers){
       
       players.addPlayer(p);
       
     }
     Score score = null;
     for(Player p: uhcplayers){
       
       score.setScore((int) p.getHealth());
       p.setScoreboard(sBoard);
     }
     
   }
}

And this?

Code:

public class ScoreBoards implements Listener{
public static ArrayList<Player> uhcplayers;
   public static Team players = null;
   public static void getUHCPlayers(ArrayList<Player> players){//This is from an another class
   
     uhcplayers = players;
     registerScoreBoard();
   }
   public static void registerScoreBoard(){
   
     ScoreboardManager manager = Bukkit.getScoreboardManager();
     Scoreboard sBoard = manager.getNewScoreboard();
     Objective obj = sBoard.registerNewObjective("test", "health");
     obj.setDisplaySlot(DisplaySlot.SIDEBAR);
     obj.setDisplayName("Players");
     players = sBoard.registerNewTeam("players");
     players.setPrefix(ChatColor.RED + "");
     for(Player p : uhcplayers){
     
       players.addPlayer(p);
     
     }
     Score score = null;
     for(Player p: uhcplayers){
     
       score.setScore((int) p.getHealth());
       p.setScoreboard(sBoard);
     }
   
   }
}

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

@LLX001
That will throw a NullPointerException cause you haven't initialized score. Something like obj.getScore(p.getName()) would do