memory optimization with command help

src/main/java/net/nuggetmc/ai/commands/CommandHandler.java

@@ -8,28 +8,44 @@ import net.nuggetmc.ai.commands.commands.PlayerAICommand;
 import org.bukkit.ChatColor;
 
 import java.lang.reflect.Method;
-import java.util.Arrays;
-import java.util.List;
-import java.util.Map;
+import java.util.*;
 import java.util.stream.Collectors;
 
 public class CommandHandler {
 
     private final DrinkCommandService drink;
+    private final Map<Class<? extends CommandInstance>, List<String>> help;
 
     public CommandHandler(PlayerAI plugin) {
         drink = (DrinkCommandService) Drink.get(plugin);
         drink.register(new PlayerAICommand(this), "bot", "playerai", "pai", "ai", "npc");
         drink.registerCommands();
+
+        help = new HashMap<>();
+
+        setHelps(new Class[] {
+                PlayerAICommand.class
+        });
     }
 
-    public List<String> getUsage(Class<? extends CommandInstance> clazz) {
+    private void setHelps(Class<? extends CommandInstance>[] cls) {
+        for (Class<? extends CommandInstance> clazz : cls) {
+            help.put(clazz, getUsage(clazz));
+        }
+    }
+
+    public List<String> getHelp(Class<? extends CommandInstance> clazz) {
+        return help.get(clazz);
+    }
+
+    private List<String> getUsage(Class<? extends CommandInstance> clazz) {
         String rootName = getRootName(clazz);
+
         return getSubCommands(clazz).stream().map(c -> {
             Command command = c.getAnnotation(Command.class);
             return ChatColor.GRAY + " ▪ " + ChatColor.YELLOW + "/" + rootName + " " + command.name() + ChatColor.GRAY + " ▪ "
                     + ChatColor.RESET + command.desc();
-        }).collect(Collectors.toList());
+        }).sorted().collect(Collectors.toList());
     }
 
     private String getRootName(Class<? extends CommandInstance> clazz) {