use createStringListFromObject for simplicity

Author: HSGamer

src/main/java/me/hsgamer/bettergui/betterforms/impl/simple/SimpleFormMenu.java

@@ -19,13 +19,14 @@
 import me.hsgamer.bettergui.betterforms.api.menu.FormMenu;
 import me.hsgamer.bettergui.betterforms.api.sender.FormSender;
 import me.hsgamer.bettergui.util.StringReplacerApplier;
+import me.hsgamer.hscore.common.CollectionUtils;
 import me.hsgamer.hscore.common.MapUtils;
 import me.hsgamer.hscore.config.Config;
 import org.bukkit.entity.Player;
 import org.geysermc.cumulus.form.SimpleForm;
 import org.geysermc.cumulus.response.SimpleFormResponse;
 
-import java.util.List;
+import java.util.Optional;
 
 public class SimpleFormMenu extends FormMenu<SimpleForm, SimpleFormResponse, SimpleForm.Builder> {
     private static final ComponentProviderBuilder<SimpleForm, SimpleFormResponse, SimpleForm.Builder> builder = new ComponentProviderBuilder<>();
@@ -34,27 +35,20 @@ public class SimpleFormMenu extends FormMenu<SimpleForm, SimpleFormResponse, Sim
         builder.register(SimpleButtonComponentProvider::new, "button", "");
     }
 
-    private final StringBuilder content = new StringBuilder();
+    private final String content;
 
     public SimpleFormMenu(FormSender sender, Config config) {
         super(sender, config);
 
-        Object source = MapUtils.getIfFound(menuSettings, "content");
-        if (source == null) {
-            return;
-        }
-        if (source instanceof List<?>) {
-            for (Object item : (List<?>) source) {
-                content.append(item.toString()).append("\n");
-            }
-            return;
-        }
-        content.append(source);
+        content = Optional.ofNullable(MapUtils.getIfFound(menuSettings, "content"))
+                .map(CollectionUtils::createStringListFromObject)
+                .map(list -> String.join("\n", list))
+                .orElse("");
     }
 
     @Override
     protected SimpleForm.Builder createFormBuilder(Player player) {
-        return SimpleForm.builder().content(StringReplacerApplier.replace(content.toString(), player.getUniqueId(), this));
+        return SimpleForm.builder().content(StringReplacerApplier.replace(content, player.getUniqueId(), this));
     }
 
     @Override