fixed command throwing error, added more messaging

plugin.yml

@@ -5,4 +5,3 @@ api-version: 1.13
 commands:
   tw:
     description: "controlls plugin"
-    usage: /jobs <list, info, stats, join, leave>

src/main/java/de/steev/Tridentwar/Tridentwar.java

@@ -17,7 +17,7 @@ public class Tridentwar extends JavaPlugin {
         getServer().getPluginManager().registerEvents(new ProjectileLaunchListener(this.gameManager, this), this);
         getServer().getPluginManager().registerEvents(new ProjectileHitListener(this.gameManager), this);
         getServer().getPluginManager().registerEvents(new PlayerDeathListener(this.gameManager), this);
-        getCommand("tw").setExecutor(new TridentwarCommand(gameManager));
+        getCommand("tw").setExecutor(new TridentwarCommand(this.gameManager));
     }
 
     @Override

src/main/java/de/steev/Tridentwar/commands/TridentwarCommand.java

@@ -15,13 +15,20 @@ public class TridentwarCommand implements CommandExecutor {
     }
 
     public boolean onCommand(CommandSender commandSender, Command command, String s, String[] args) {
-        if (args[0] == null) return false;
 
+        if(args.length >= 1) {
             switch (args[0].toLowerCase()){
+                default:
+                    commandSender.sendMessage("use args: start");
+                    break;
                 case "start":
+                    System.out.println(args[0]);
                     gameManager.setGameState(GameState.STARTING);
                     break;
             }
+        } else {
+            commandSender.sendMessage("Empty Commands are not allowed!");
+        }
         return false;
     }
 }

src/main/java/de/steev/Tridentwar/manager/GameManager.java

@@ -29,7 +29,11 @@ public class GameManager {
                 this.playerManager.giveKits();
                 break;
             case STARTING:
-                if(Bukkit.getOnlinePlayers().size() < 2) return; // TODO: Message about minimal player count not beeing reached
+                if(Bukkit.getOnlinePlayers().size() < 2) {
+                    // Message about minimal player count not beeing reached
+                    Bukkit.broadcastMessage("Game cannot be started with a single player");
+                    return;
+                }
                 Bukkit.broadcastMessage("Starting!");
                 this.gameStartCountdownTask = new GameStartCountdownTask(this);
                 this.gameStartCountdownTask.runTaskTimer(plugin, 0 , 20);