diff --git a/src/main/java/emu/grasscutter/data/excels/RewardPreviewData.java b/src/main/java/emu/grasscutter/data/excels/RewardPreviewData.java
index dad51e911..caba57447 100644
--- a/src/main/java/emu/grasscutter/data/excels/RewardPreviewData.java
+++ b/src/main/java/emu/grasscutter/data/excels/RewardPreviewData.java
@@ -25,7 +25,7 @@ public class RewardPreviewData extends GameResource {
                     Arrays.stream(this.previewItems)
                             .filter(d -> d.getId() > 0 && d.getCount() != null && !d.getCount().isEmpty())
                             .map(ItemParamStringData::toItemParamData)
-                            .toArray(size -> new ItemParamData[size]);
+                            .toArray(ItemParamData[]::new);
         } else {
             this.previewItemsArray = new ItemParamData[0];
         }
diff --git a/src/main/java/emu/grasscutter/game/props/ItemUseAction/ItemUseGainAvatar.java b/src/main/java/emu/grasscutter/game/props/ItemUseAction/ItemUseGainAvatar.java
index 1dae2822d..add08558d 100644
--- a/src/main/java/emu/grasscutter/game/props/ItemUseAction/ItemUseGainAvatar.java
+++ b/src/main/java/emu/grasscutter/game/props/ItemUseAction/ItemUseGainAvatar.java
@@ -1,5 +1,6 @@
 package emu.grasscutter.game.props.ItemUseAction;
 
+import emu.grasscutter.data.excels.avatar.AvatarSkillDepotData;
 import emu.grasscutter.game.avatar.Avatar;
 import emu.grasscutter.game.props.ItemUseOp;
 import emu.grasscutter.game.systems.InventorySystem;
@@ -43,7 +44,7 @@ public class ItemUseGainAvatar extends ItemUseInt {
             int itemId =
                     Optional.ofNullable(params.player.getAvatars().getAvatarById(this.i))
                             .map(Avatar::getSkillDepot)
-                            .map(depot -> depot.getTalentCostItemId())
+                            .map(AvatarSkillDepotData::getTalentCostItemId)
                             .orElse((this.i % 1000) + 100);
             return params.player.getInventory().addItem(itemId);
         }
diff --git a/src/main/java/emu/grasscutter/game/systems/InventorySystem.java b/src/main/java/emu/grasscutter/game/systems/InventorySystem.java
index 568872e23..f84ae7078 100644
--- a/src/main/java/emu/grasscutter/game/systems/InventorySystem.java
+++ b/src/main/java/emu/grasscutter/game/systems/InventorySystem.java
@@ -58,7 +58,7 @@ public class InventorySystem extends BaseGameSystem {
         } else {
             avatarId =
                     Optional.ofNullable(GameData.getItemDataMap().get(id))
-                            .map(itemData -> itemData.getItemUseActions())
+                            .map(ItemData::getItemUseActions)
                             .flatMap(
                                     actions ->
                                             actions.stream()