java - Problems with accessing HashMaps from other classes -

i writing plugin using spigot (pretty bukkit) i'm having problems accessing hashmap 1 class in another. here hashmap , getter:

private map<string, integer> compplayers = new hashmap<string, integer>();  public map<string, integer> getcompplayers(){     return compplayers; } 

i able see if hashmap contains keys within class such here:

if(args[0].equalsignorecase("join")){     if(compplayers.containskey(p.getname())){         p.sendmessage(chatcolor.red + "you part of competition");         return false;     } 

yet in listener class, can't seem access properly. here's section of code in listener class:

public class competitionlistener implements listener {  private pluginmain plugin;  public competitionlistener(pluginmain plugin){     this.plugin = plugin; }  @eventhandler public void onblockplace(blockbreakevent e){         player p = (player) e.getplayer();         p.sendmessage("blockbreakevent");         if(plugin.getcommands().getcompplayers().containskey(p.getname())){             p.sendmessage(chatcolor.yellow + "you scored point!");             plugin.getcommands().getcompplayers().put(p.getname(), plugin.getcommands().getcompplayers().get(p.getname() + 1));         }     } } 

pluginmain class extends javaplugin , getcommands() getter commands class within it.

though able access these methods listener class without errors, line checking if player name in hashmap doesn't work , returns false. event work.

you never register events in listener class.

in listener class's constructor, add following:

plugin.getserver().getpluginmanager().registerevents(this, plugin);