Solved Getting a NPE? -_-

Discussion in 'Plugin Development' started by PimpDuck, Sep 9, 2013.

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  1. Offline

    PimpDuck

    I've been trying to fix this for a half hour.. I'm getting an NPE on line 26 in my CommandClass

    Error:
    Code:
    16:30:31 [SEVERE] null
org.bukkit.command.CommandException: Unhandled exception executing command 'near
' in plugin DCNear v1.0
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46)
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:18
9)
        at org.bukkit.craftbukkit.v1_6_R2.CraftServer.dispatchCommand(CraftServe
r.java:523)
        at net.minecraft.server.v1_6_R2.PlayerConnection.handleCommand(PlayerCon
nection.java:964)
        at net.minecraft.server.v1_6_R2.PlayerConnection.chat(PlayerConnection.j
ava:882)
        at net.minecraft.server.v1_6_R2.PlayerConnection.a(PlayerConnection.java
:839)
        at net.minecraft.server.v1_6_R2.Packet3Chat.handle(SourceFile:49)
        at net.minecraft.server.v1_6_R2.NetworkManager.b(NetworkManager.java:296
)
        at net.minecraft.server.v1_6_R2.PlayerConnection.e(PlayerConnection.java
:118)
        at net.minecraft.server.v1_6_R2.ServerConnection.b(SourceFile:37)
        at net.minecraft.server.v1_6_R2.DedicatedServerConnection.b(SourceFile:3
0)
        at net.minecraft.server.v1_6_R2.MinecraftServer.t(MinecraftServer.java:5
90)
        at net.minecraft.server.v1_6_R2.DedicatedServer.t(DedicatedServer.java:2
26)
        at net.minecraft.server.v1_6_R2.MinecraftServer.s(MinecraftServer.java:4
86)
        at net.minecraft.server.v1_6_R2.MinecraftServer.run(MinecraftServer.java
:419)
        at net.minecraft.server.v1_6_R2.ThreadServerApplication.run(SourceFile:5
82)
Caused by: java.lang.NullPointerException
        at org.bukkit.ChatColor.translateAlternateColorCodes(ChatColor.java:203)
 
        at me.PimpDuck.DCNear.CommandClass.onCommand(CommandClass.java:26)
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
        ... 15 more
    CommandClass:
    Code:java
    1. package me.PimpDuck.DCNear;
    2.  
    3.  
    4. import org.bukkit.ChatColor;
    5. import org.bukkit.Location;
    6. import org.bukkit.command.Command;
    7. import org.bukkit.command.CommandExecutor;
    8. import org.bukkit.command.CommandSender;
    9. import org.bukkit.entity.Entity;
    10. import org.bukkit.entity.Player;
    11.  
    12. public class CommandClass implements CommandExecutor {
    13.  
    14.     private Main plugin;
    15.  
    16.     public CommandClass(Main instance)
    17.     {
    18.         plugin = instance;
    19.     }
    20.  
    21.     @Override
    22.     public boolean onCommand(CommandSender sender, Command cmd, String command, String[] args) {
    23.     if(cmd.getName().equalsIgnoreCase("near")){
    24.         Player player = (Player) sender;
    25.         String prefix = plugin.getConfig().getString("dcnear.chat-prefix");
    26.         prefix = ChatColor.translateAlternateColorCodes('&', prefix);
    27.  
    28.             if ((sender instanceof Player)) {
    29.                   if (args.length > 0)
    30.                   {
    31.                     if (args[0].equalsIgnoreCase("help")) {
    32.                         player.sendMessage(ChatColor.RED + "=============" + ChatColor.BLUE + "[ " + ChatColor.AQUA + "Diamcraft Near" + ChatColor.BLUE + " ]" + ChatColor.RED + "=============");
    33.                         player.sendMessage(ChatColor.BLACK + "* " + ChatColor.GOLD + "(/near) shows who's near you.");
    34.                         player.sendMessage(ChatColor.BLACK + "* " + ChatColor.GOLD + "(/near help) shows you this page of course. :P");
    35.                         player.sendMessage(ChatColor.RED + "------------------" + ChatColor.GOLD + "Ranks" + ChatColor.RED + "------------------");
    36.                         player.sendMessage(ChatColor.BLACK + "* " + ChatColor.GOLD + "GOD ranks distance is set to " + plugin.getConfig().getInt("dcnear.distance.god") + " blocks.");
    37.                         player.sendMessage(ChatColor.BLACK + "* " + ChatColor.GOLD + "UB3R ranks distance is set to " + plugin.getConfig().getInt("dcnear.distance.ub3r") + " blocks.");
    38.                         player.sendMessage(ChatColor.BLACK + "* " + ChatColor.GOLD + "Legend ranks distance is set to " + plugin.getConfig().getInt("dcnear.distance.legend") + " blocks.");
    39.                         player.sendMessage(ChatColor.BLACK + "* " + ChatColor.GOLD + "Super ranks distance is set to " + plugin.getConfig().getInt("dcnear.distance.super") + " blocks.");
    40.                         player.sendMessage(ChatColor.RED + "=========================================");
    41.                         return false;
    42.                     }
    43.                     if(args[0].equalsIgnoreCase("reload")){
    44.                         if(player.hasPermission("dcnear.reload") || player.hasPermission("dcnear.*")){
    45.                         plugin.reloadConfig();
    46.                         player.sendMessage(prefix + ChatColor.GOLD + "Configuration Reloaded!");
    47.                         return false;
    48.                     }else{
    49.                         player.sendMessage(prefix + ChatColor.RED + "You don't have permission to do this!");
    50.                         return true;
    51.                     }
    52.                   }
    53.                   }
    54.  
    55.                   if(args.length >= 1 && !args[0].equalsIgnoreCase("help") && !args[0].equalsIgnoreCase("reload") && !player.hasPermission("dcnear.*")){
    56.                       player.sendMessage(prefix + ChatColor.DARK_RED + "Too many arguments!");
    57.                       return true;
    58.                   }
    59.  
    60.                 double range = 0;
    61.                   if (Main.playerDelayed(player))
    62.                     {
    63.                         if(Main.getRemainingTime(player) < 1)
    64.                         {
    65.                             Main.removeDelayedPlayer(player);
    66.                         }else
    67.                         {
    68.                             int remaining = Main.getRemainingTime(player);
    69.                             String minutes = remaining == 1 ? " minute" : " minutes";
    70.  
    71.                             player.sendMessage(prefix + ChatColor.GOLD + ("You must wait " + remaining + minutes + " before using /near again!"));
    72.                             return false;
    73.                         }
    74.                     }
    75.                 if (player.hasPermission("dcnear.god") || player.hasPermission("dcnear.ub3r") || player.hasPermission("dcnear.legend") || player.hasPermission("dcnear.super") || player.hasPermission("dcnear.*")) {
    76.                     if (args.length == 1 && player.hasPermission("dcnear.*")) {
    77.                         try {
    78.                             range = Double.parseDouble(args[0]);
    79.                         } catch (NumberFormatException nfe) {
    80.                             player.sendMessage(prefix + ChatColor.RED + "Argument must be a number!");
    81.                             return false;
    82.                         }
    83.                     }
    84.                     if (args.length == 0 && player.hasPermission("dcnear.god")) {
    85.                         range = plugin.getConfig().getDouble("dcnear.distance.god");   
    86.                         Main.addDelayedPlayer(player);
    87.                     }
    88.                     if(args.length == 0 && player.hasPermission("dcnear.ub3r")){
    89.                         range = plugin.getConfig().getDouble("dcnear.distance.ub3r");
    90.                         Main.addDelayedPlayer(player);
    91.                     }
    92.                     if(args.length == 0 && player.hasPermission("dcnear.legend")){
    93.                         range = plugin.getConfig().getDouble("dcnear.distance.legend");
    94.                         Main.addDelayedPlayer(player);
    95.                     }
    96.                     if(args.length == 0 && player.hasPermission("dcnear.super")){
    97.                             range = plugin.getConfig().getDouble("dcnear.distance.super");
    98.                             Main.addDelayedPlayer(player);
    99.                     }
    100.                     if(args.length == 0 && player.hasPermission("dcnear.*")){
    101.                         player.sendMessage(prefix + ChatColor.GOLD + "Try /near [Number]");
    102.                         Main.removeDelayedPlayer(player);
    103.                         return true;
    104.                     }
    105.                     if (range != 0) {
    106.                         Location start_loc = player.getLocation();
    107.                         StringBuilder sb = new StringBuilder();
    108.                         for (Entity nearbyEntity : player.getNearbyEntities(range, range, range)) {
    109.                             if (nearbyEntity instanceof Player) {
    110.                                 Location end_loc = nearbyEntity.getLocation();
    111.                                 int distance = (int) start_loc.distance(end_loc);
    112.  
    113.                                 if(distance <= range){
    114.                                     sb.append(((Player) nearbyEntity).getName()).append(" (").append(ChatColor.DARK_RED).append(distance).append("m").append(ChatColor.WHITE).append("), ");
    115.                                 }
    116.                             }
    117.                         }
    118.                         String message;
    119.                         if (sb.length() > 0) {
    120.                             message = sb.toString().substring(0, (sb.length() - 2));
    121.                         } else {
    122.                             message = "none";
    123.                         }
    124.                         player.sendMessage(ChatColor.GOLD + "Players nearby: " + ChatColor.WHITE + message);
    125.                     }
    126.                 } else {
    127.                     player.sendMessage(prefix + ChatColor.RED + "You are not a high enough rank to do this! Do /near help for more information.");
    128.                     return true;
    129.                 }
    130.             } else {
    131.                 player.sendMessage(prefix + ChatColor.DARK_RED + "Only in game players can use this command!");
    132.                 return false;
    133.             }
    134.             return true;
    135.         }
    136.         return false;
    137.     }
    138. }
     
    PimpDuck, Sep 9, 2013
    #1
  2. Offline

    sharp237

    Maybe the variable prefix is null?
     
    sharp237, Sep 9, 2013
    #2
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