Scope issue with scoreboard teams?

Discussion in 'Plugin Development' started by ThePandaPlayer, Aug 21, 2017.

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  1. Offline

    ThePandaPlayer

    Hello all! I am having trouble with a scoreboard. Here is the code:
    Code:
        public void onEnable() {
       
        this.getServer().getPluginManager().registerEvents(this,this);
        Team ownerrank = rank.registerNewTeam("owner");
        ownerrank.setPrefix(ChatColor.RED+"Owner"+ChatColor.WHITE);
        Team platformadmin = rank.registerNewTeam("platformadmin");
        platformadmin.setPrefix(ChatColor.RED+"Platform Admin"+ChatColor.WHITE);
        Team adminrank = rank.registerNewTeam("admin");
        adminrank.setPrefix(ChatColor.RED+"Admin"+ChatColor.WHITE);
        Team devrank = rank.registerNewTeam("dev");
        devrank.setPrefix(ChatColor.YELLOW+"Dev");
        Team srmodrank = rank.registerNewTeam("srmod");
        srmodrank.setPrefix(ChatColor.DARK_PURPLE+"Sr.Mod"+ChatColor.WHITE);
        Team modrank = rank.registerNewTeam("mod");
        modrank.setPrefix(ChatColor.DARK_PURPLE+"Mod"+ChatColor.WHITE);
        Team deluxerank = rank.registerNewTeam("deluxe");
        deluxerank.setPrefix(ChatColor.GOLD+"✪"+ChatColor.YELLOW);
       
       
       
       
       
    }
public void updateRanks() {
  for(Player p : Bukkit.getOnlinePlayers()) {
    if(p.hasPermission(owner) {
       ownerrank.addPlayer(p);
    This is where the problem lies: ownerrank.addPlayer(p); Eclipse gives me an error saying "ownerrank cannot be resolved" is this a scope issue?
     
    ThePandaPlayer, Aug 21, 2017
    #1
  2. Offline

    timtower Administrator Administrator Moderator

    timtower, Aug 21, 2017
    #2
  3. Offline

    ThePandaPlayer

    @timtower
    Okay, how would I fix this. I want the ranks to be updated every time a player joins and leaves.
     
    ThePandaPlayer, Aug 21, 2017
    #3
  4. Offline

    timtower Administrator Administrator Moderator

    timtower, Aug 21, 2017
    #4
  5. Offline

    ThePandaPlayer

    Okay I'll see about it.

    @timtower
    Okay, when I load up the server it gives me an error:
    Code:
    [08:12:16] [Server thread/ERROR]: Could not load 'plugins\MCDuelsPrefix.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.NullPointerException
    at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:133) ~[spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
    at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:326) ~[spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
    at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:248) [spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
    at org.bukkit.craftbukkit.v1_12_R1.CraftServer.loadPlugins(CraftServer.java:298) [spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
    at net.minecraft.server.v1_12_R1.DedicatedServer.init(DedicatedServer.java:205) [spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
    at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:544) [spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
    at java.lang.Thread.run(Unknown Source) [?:1.8.0_141]
Caused by: java.lang.NullPointerException
    at com.mcduels.prefix.Main.<init>(Main.java:28) ~[?:?]
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.8.0_141]
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.8.0_141]
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) ~[?:1.8.0_141]
    at java.lang.reflect.Constructor.newInstance(Unknown Source) ~[?:1.8.0_141]
    at java.lang.Class.newInstance(Unknown Source) ~[?:1.8.0_141]
    at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:76) ~[spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
    at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:129) ~[spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
    ... 6 more
[08:12:16]
    If you look closely, "at com.mcduels.prefix.Main.<init>(Main.java:28)~[?:1.8.0_141]
    That means, at line 28 there is some kind of error. Look what line 28 of my code is:

    Code:
    package com.mcduels.prefix;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.permissions.Permission;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.scoreboard.Scoreboard;
import org.bukkit.scoreboard.Team;

public class Main extends JavaPlugin implements Listener {
  
  
    public Permission owner = new Permission("mcduels.prefix.owner");
    public Permission backadmin = new Permission("mcduels.prefix.platformadmin");
    public Permission admin = new Permission("mcduels.perefix.admin");
    public Permission dev = new Permission("mcduels.prefix.dev");
    public Permission srmod = new Permission("mcduels.prefix.srmod");
    public Permission mod = new Permission("mcduels.prefix.mod");
    public Permission yt = new Permission("mcduels.prefix.yt");
    public Permission premium = new Permission("mcduels.prefix.premium");
    public Permission deluxe = new Permission("mcduels.prefix.deluxe");
  
    private Scoreboard rank;
    
    Team ownerrank = rank.registerNewTeam("owner");
    Team platformadmin = rank.registerNewTeam("platformadmin");
    Team premiumrank = rank.registerNewTeam("premium");
    Team adminrank = rank.registerNewTeam("admin");
    Team devrank = rank.registerNewTeam("dev");
    Team srmodrank = rank.registerNewTeam("srmod");
    Team modrank = rank.registerNewTeam("mod");
    Team deluxerank = rank.registerNewTeam("deluxe");
    Team op = rank.registerNewTeam("op");
    Team ytrank = rank.registerNewTeam("yt");
    
  
  
    @Override
    public void onEnable() {
      
        this.getServer().getPluginManager().registerEvents(this,this);

        ownerrank.setPrefix(ChatColor.RED+"Owner"+ChatColor.WHITE);
      
        op.setPrefix(ChatColor.DARK_RED+"Op"+ChatColor.WHITE);
      
        platformadmin.setPrefix(ChatColor.RED+"Platform Admin"+ChatColor.WHITE);
      
        adminrank.setPrefix(ChatColor.RED+"Admin"+ChatColor.WHITE);
      
        devrank.setPrefix(ChatColor.YELLOW+"Dev");
      
        srmodrank.setPrefix(ChatColor.DARK_PURPLE+"Sr.Mod"+ChatColor.WHITE);
      
        modrank.setPrefix(ChatColor.DARK_PURPLE+"Mod"+ChatColor.WHITE);
      
        deluxerank.setPrefix(ChatColor.GOLD+"✪"+ChatColor.YELLOW);
      
        ytrank.setPrefix(ChatColor.RED+"You"+ChatColor.DARK_RED+"Tube");
      
        premiumrank.setPrefix(ChatColor.BLUE+"✯"+ChatColor.DARK_AQUA);
      
      
      
      
      
    }
  
    @SuppressWarnings("deprecation")
    public void updateRanks() {
        for(Player p : Bukkit.getOnlinePlayers()) {
            if(p.isOp()) {
                op.addPlayer(p);
                return;
            }
          
            else if(p.hasPermission(owner)) {
              
                ownerrank.addPlayer(p);
                return;
            }
            else if(p.hasPermission(admin)) {
                adminrank.addPlayer(p);
                return;
            }
            else if(p.hasPermission(dev)) {
                devrank.addPlayer(p);
            }
            else if(p.hasPermission(srmod)) {
                srmodrank.addPlayer(p);
                return;
            }
            else if(p.hasPermission(mod)) {
                modrank.addPlayer(p);
                return;
            }
          
            else if(p.hasPermission(backadmin)) {
                platformadmin.addPlayer(p);
                return;
            }
            else if(p.hasPermission(yt)) {
                ytrank.addPlayer(p);
                return;
            }
            else if(p.hasPermission(premium)) {
                premiumrank.addPlayer(p);
                return;
            }
            else if(p.hasPermission(deluxe)) {
                deluxerank.addPlayer(p);
                return;
            }
            else {
                return;
              
              
            }
          
          
        }
      
    }
  
  

  
    @EventHandler
    public void onPlayerJoin(PlayerJoinEvent e)  {
      
        Main rankReloader = new Main();
        rankReloader.updateRanks();
      
    }
  
  

}
    [EDIT: Oops! I had the Teams commented to see if it still errored. (It didn't but it cut out the main functionality]
    Line 28 is where I start declaring my Team fields.
    Any way to fix this?

    EDIT by Moderator: merged posts, please use the edit button instead of double posting.
     
    Last edited: Aug 22, 2017
    ThePandaPlayer, Aug 21, 2017
    #5
  6. Offline

    timtower Administrator Administrator Moderator

    @ThePandaPlayer rank is null.
    Declare in the class, initialize in the onEnable.
     
    timtower, Aug 22, 2017
    #6
  7. Offline

    ThePandaPlayer

    Okay, so I have the actual Scoreboard object declared in the class. If I initialize the teams in the onEnable, it gives me the scope error I had before. (I don't want to sound annoying, I'm just genuinely confused)
     
    ThePandaPlayer, Aug 22, 2017
    #7
  8. Offline

    timtower Administrator Administrator Moderator

    @ThePandaPlayer Initializing is without the type in front of it.
    So value = something
    Not Scoreboard value = something
     
    timtower, Aug 22, 2017
    #8
  9. Offline

    ThePandaPlayer

    I see now. Thank you.

    UPDATE:
    I just compiled and got ANOTHER simiar error:
    Code:
    java.lang.NullPointerException: null
    at com.mcduels.prefix.Main.onEnable(Main.java:47) ~[?:?]
    at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:264) ~[spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
    at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:337) [spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
    at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:402) [spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
    at org.bukkit.craftbukkit.v1_12_R1.CraftServer.enablePlugin(CraftServer.java:374) [spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
    at org.bukkit.craftbukkit.v1_12_R1.CraftServer.enablePlugins(CraftServer.java:323) [spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
    at net.minecraft.server.v1_12_R1.MinecraftServer.t(MinecraftServer.java:421) [spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
    at net.minecraft.server.v1_12_R1.MinecraftServer.l(MinecraftServer.java:382) [spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
    at net.minecraft.server.v1_12_R1.MinecraftServer.a(MinecraftServer.java:337) [spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
    at net.minecraft.server.v1_12_R1.DedicatedServer.init(DedicatedServer.java:272) [spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
    at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:544) [spigot-1.12.jar:git-Spigot-596221b-9a1fc1e]
    at java.lang.Thread.run(Unknown Source) [?:1.8.0_141]
[09:37:21]
    Here is the code after revisions:

    Code:
    package com.mcduels.prefix;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.permissions.Permission;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.scoreboard.Scoreboard;
import org.bukkit.scoreboard.Team;

public class Main extends JavaPlugin implements Listener {
   
   
    public Permission owner = new Permission("mcduels.prefix.owner");
    public Permission backadmin = new Permission("mcduels.prefix.platformadmin");
    public Permission admin = new Permission("mcduels.perefix.admin");
    public Permission dev = new Permission("mcduels.prefix.dev");
    public Permission srmod = new Permission("mcduels.prefix.srmod");
    public Permission mod = new Permission("mcduels.prefix.mod");
    public Permission yt = new Permission("mcduels.prefix.yt");
    public Permission premium = new Permission("mcduels.prefix.premium");
    public Permission deluxe = new Permission("mcduels.prefix.deluxe");
   
    private Scoreboard rank;
    private Team ownerrank;
    private Team platformadmin;
    private Team premiumrank;
    private Team adminrank;
    private Team devrank;
    private Team srmodrank;
    private Team modrank;
    private Team deluxerank;
    private Team op;
    private Team ytrank;
   
   
   
   
   
    @Override
    public void onEnable() {
       
        getLogger().info("Registering Ranks...");
        ownerrank = rank.registerNewTeam("owner");
        platformadmin = rank.registerNewTeam("platformadmin");
        premiumrank = rank.registerNewTeam("premium");
        adminrank = rank.registerNewTeam("admin");
        devrank = rank.registerNewTeam("dev");
        srmodrank = rank.registerNewTeam("srmod");
        modrank = rank.registerNewTeam("mod");
        deluxerank = rank.registerNewTeam("deluxe");
        op = rank.registerNewTeam("op");
        ytrank = rank.registerNewTeam("yt");
       
       
        getLogger().info("Registering events...");
        this.getServer().getPluginManager().registerEvents(this,this);
       
        getLogger().info("Setting Prefixes...");
       
        ownerrank.setPrefix(ChatColor.RED+"Owner"+ChatColor.WHITE);
       
        op.setPrefix(ChatColor.DARK_RED+"Op"+ChatColor.WHITE);
       
        platformadmin.setPrefix(ChatColor.RED+"Platform Admin"+ChatColor.WHITE);
       
        adminrank.setPrefix(ChatColor.RED+"Admin"+ChatColor.WHITE);
       
        devrank.setPrefix(ChatColor.YELLOW+"Dev");
       
        srmodrank.setPrefix(ChatColor.DARK_PURPLE+"Sr.Mod"+ChatColor.WHITE);
       
        modrank.setPrefix(ChatColor.DARK_PURPLE+"Mod"+ChatColor.WHITE);
       
        deluxerank.setPrefix(ChatColor.GOLD+"✪"+ChatColor.YELLOW);
       
        ytrank.setPrefix(ChatColor.RED+"You"+ChatColor.DARK_RED+"Tube");
       
        premiumrank.setPrefix(ChatColor.BLUE+"✯"+ChatColor.DARK_AQUA);
       
        getLogger().info("Successful initalization!");
       
       
       
       
       
       
    }
   
   
    @SuppressWarnings("deprecation")
    public void updateRanks() {
        for(Player p : Bukkit.getOnlinePlayers()) {
            if(p.isOp()) {
                op.addPlayer(p);
                return;
            }
           
            else if(p.hasPermission(owner)) {
               
               
                ownerrank.addPlayer(p);
                return;
            }
            else if(p.hasPermission(admin)) {
                adminrank.addPlayer(p);
                return;
            }
            else if(p.hasPermission(dev)) {
                devrank.addPlayer(p);
            }
            else if(p.hasPermission(srmod)) {
                srmodrank.addPlayer(p);
                return;
            }
            else if(p.hasPermission(mod)) {
                modrank.addPlayer(p);
                return;
            }
           
            else if(p.hasPermission(backadmin)) {
                platformadmin.addPlayer(p);
                return;
            }
            else if(p.hasPermission(yt)) {
                ytrank.addPlayer(p);
                return;
            }
            else if(p.hasPermission(premium)) {
                premiumrank.addPlayer(p);
                return;
            }
            else if(p.hasPermission(deluxe)) {
                deluxerank.addPlayer(p);
                return;
            }
            else {
                return;
               
               
            }
           
           
        }
       
    }
   
   

   
    @EventHandler
    public void onPlayerJoin(PlayerJoinEvent e)  {
       
        Main rankReloader = new Main();
        rankReloader.updateRanks();
       
    }
   
   

}
    The error is pointing to line 47 which is: ownerrank = rank.registerNewTeam("owner");
    I am trying to make the 'rank' object something, but Eclipse tells me "cannot instantiate Scoreboard" because it's just an interface.
     
    Last edited: Aug 22, 2017
    ThePandaPlayer, Aug 22, 2017
    #9
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