Solved Help with scoreboard and scheduler

I'm trying for a long time to fix that, but I can not. how to fix?
He says that already exists, but I just registered the new goal after he check whether you already have. Why this happens?

Code:

if(!(this.sb.getObjective("showhealt") == null)){
            this.objective.setDisplayName(ChatColor.RED + "❤");
            p.setHealth(p.getHealth());
        }else{
        this.objective = this.sb.registerNewObjective("showhealth", "health");  
        this.objective.setDisplaySlot(DisplaySlot.BELOW_NAME);
        this.objective.setDisplayName(ChatColor.RED + "❤");
        p.setHealth(p.getHealth());
        }

error:

Code:

20:26:42 [WARNING] [TheTags] Task #14 for TheTags v2.0 generated an exception
java.lang.IllegalArgumentException: An objective of name 'showhealth' already ex
ists
        at org.apache.commons.lang.Validate.isTrue(Validate.java:157)
        at org.bukkit.craftbukkit.v1_5_R3.scoreboard.CraftScoreboard.registerNew
Objective(CraftScoreboard.java:40)
        at org.bukkit.craftbukkit.v1_5_R3.scoreboard.CraftScoreboard.registerNew
Objective(CraftScoreboard.java:20)
        at me.souonick.C.TheTags.Placar.update(Placar.java:36)
        at me.souonick.C.TheTags.Main$1.run(Main.java:23)
        at org.bukkit.craftbukkit.v1_5_R3.scheduler.CraftTask.run(CraftTask.java
:53)
        at org.bukkit.craftbukkit.v1_5_R3.scheduler.CraftScheduler.mainThreadHea
rtbeat(CraftScheduler.java:345)
        at net.minecraft.server.v1_5_R3.MinecraftServer.r(MinecraftServer.java:5
13)
        at net.minecraft.server.v1_5_R3.DedicatedServer.r(DedicatedServer.java:2
26)
        at net.minecraft.server.v1_5_R3.MinecraftServer.q(MinecraftServer.java:4
77)
        at net.minecraft.server.v1_5_R3.MinecraftServer.run(MinecraftServer.java
:410)
        at net.minecraft.server.v1_5_R3.ThreadServerApplication.run(SourceFile:5
73)
>

 

@SrNicks_
Can we see the whole class?

 

@meguy26

Code:

package me.SrNick.C.TheTags;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.entity.Player;
import org.bukkit.scoreboard.DisplaySlot;
import org.bukkit.scoreboard.Objective;
import org.bukkit.scoreboard.Scoreboard;
import org.bukkit.scoreboard.ScoreboardManager;
import org.bukkit.scoreboard.Team;

public class Placar
{
  private ScoreboardManager sm;
  private Scoreboard sb;
  private Team team;
  private Objective objective;
  Main main;

  public Placar(Main main)
  {
    this.main = main;
  }

  public void update(Player p)
  {
    this.sm = Bukkit.getScoreboardManager();
    this.sb = this.sm.getMainScoreboard();   
        String hasNameTeam = p.getName();
        String nameTeam;   
        nameTeam = hasNameTeam;
        if(!(this.sb.getObjective("showhealt") == null)){
            this.objective.setDisplayName(ChatColor.RED + "❤");
            p.setHealth(p.getHealth());
        }else{
        this.objective = this.sb.registerNewObjective("showhealth", "health");  
        this.objective.setDisplaySlot(DisplaySlot.BELOW_NAME);
        this.objective.setDisplayName(ChatColor.RED + "❤");
        p.setHealth(p.getHealth());
        }
        String tagFinal = "[Opped] ";
        if (this.sb.getTeam(nameTeam) != null)
        {
          this.team = this.sb.getTeam(nameTeam);
          this.team.addPlayer(p);
          this.team.setPrefix(tagFinal);
      
        }
        else
        {
          this.team = this.sb.registerNewTeam(nameTeam);
          this.team.addPlayer(p);
          this.team.setPrefix(tagFinal);
        }
  
    }

  public void setScoreboardPlayer(Player p)
  {
    p.setScoreboard(this.sb);
  }
}

 

@SrNicks_
OHMYGOSH IVEGOTIT!!!!
I think ive got it, its actually quite simple really:

Code:

//check for "showhealth" instead of "showhealt"
if(!(this.sb.getObjective("showhealth") == null)){
            this.objective.setDisplayName(ChatColor.RED + "❤");
            p.setHealth(p.getHealth());
        }else{
        this.objective = this.sb.registerNewObjective("showhealth", "health");
        this.objective.setDisplaySlot(DisplaySlot.BELOW_NAME);
        this.objective.setDisplayName(ChatColor.RED + "❤");
        p.setHealth(p.getHealth());
        }

I believe you just mistyped the if statement....

EDIT:

I just realized the complete and total redundancy of that sentence...

 

@meguy26
Thank you for your help. I got another error, know how to solve?

Code:

21:26:36 [WARNING] [TheTags] Task #14 for TheTags v2.0 generated an exception
java.lang.NullPointerException
        at me.SrNick.C.TheTags.Placar.update(Placar.java:33)
        at me.SrNick.C.TheTags.Main$1.run(Main.java:23)
        at org.bukkit.craftbukkit.v1_5_R3.scheduler.CraftTask.run(CraftTask.java
:53)
        at org.bukkit.craftbukkit.v1_5_R3.scheduler.CraftScheduler.mainThreadHea
rtbeat(CraftScheduler.java:345)
        at net.minecraft.server.v1_5_R3.MinecraftServer.r(MinecraftServer.java:5
13)
        at net.minecraft.server.v1_5_R3.DedicatedServer.r(DedicatedServer.java:2
26)
        at net.minecraft.server.v1_5_R3.MinecraftServer.q(MinecraftServer.java:4
77)
        at net.minecraft.server.v1_5_R3.MinecraftServer.run(MinecraftServer.java
:410)
        at net.minecraft.server.v1_5_R3.ThreadServerApplication.run(SourceFile:5
73)

 

@SrNicks_
http://bukkit.org/threads/how-to-re...ubleshoot-your-own-plugins-by-yourself.32457/

 

@SrNicks_ Placar line 33 is pointing to a null value.

 

@meguy26 and @nverdier
thanks!

 

Glad to be of help