diff --git a/src/main/java/emu/grasscutter/game/dungeons/challenge/factory/KillMonsterTimeChallengeFactoryHandler.java b/src/main/java/emu/grasscutter/game/dungeons/challenge/factory/KillMonsterTimeChallengeFactoryHandler.java
index f2d4c63ae..8b17ac2b2 100644
--- a/src/main/java/emu/grasscutter/game/dungeons/challenge/factory/KillMonsterTimeChallengeFactoryHandler.java
+++ b/src/main/java/emu/grasscutter/game/dungeons/challenge/factory/KillMonsterTimeChallengeFactoryHandler.java
@@ -29,8 +29,7 @@ public class KillMonsterTimeChallengeFactoryHandler implements ChallengeFactoryH
             Scene scene,
             SceneGroup group) {
         val realGroup = scene.getScriptManager().getGroupById(groupId);
-        val challengeTriggers = new ArrayList<ChallengeTrigger>();
-        challengeTriggers.addAll(List.of(new KillMonsterCountTrigger(), new InTimeTrigger()));
+        val challengeTriggers = new ArrayList<>(List.of(new KillMonsterCountTrigger(), new InTimeTrigger()));
 
         val challengeData = GameData.getDungeonChallengeConfigDataMap().get(challengeId);
         val challengeType = challengeData.getChallengeType();
diff --git a/src/main/java/emu/grasscutter/game/mail/MailHandler.java b/src/main/java/emu/grasscutter/game/mail/MailHandler.java
index 45b3373f6..2862f6ebe 100644
--- a/src/main/java/emu/grasscutter/game/mail/MailHandler.java
+++ b/src/main/java/emu/grasscutter/game/mail/MailHandler.java
@@ -58,8 +58,7 @@ public class MailHandler extends BasePlayerManager {
     }
 
     public void deleteMail(List<Integer> mailList) {
-        List<Integer> sortedMailList = new ArrayList<>();
-        sortedMailList.addAll(mailList);
+		    List<Integer> sortedMailList = new ArrayList<>(mailList);
         sortedMailList.sort(Collections.reverseOrder());
 
         List<Integer> deleted = new ArrayList<>();