From feba8fcb42d48ec080463b82671aa8b3fa7d947b Mon Sep 17 00:00:00 2001
From: Looly <loolly@aliyun.com>
Date: Tue, 4 Jun 2024 08:47:34 +0800
Subject: [PATCH] =?UTF-8?q?CollUtil.subtract=E5=A2=9E=E5=8A=A0=E7=A9=BA?=
 =?UTF-8?q?=E5=88=A4=E5=AE=9A?=
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---
 .../java/org/dromara/hutool/core/collection/CollUtil.java     | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/hutool-core/src/main/java/org/dromara/hutool/core/collection/CollUtil.java b/hutool-core/src/main/java/org/dromara/hutool/core/collection/CollUtil.java
index d2fbb372c..e21fe7afc 100644
--- a/hutool-core/src/main/java/org/dromara/hutool/core/collection/CollUtil.java
+++ b/hutool-core/src/main/java/org/dromara/hutool/core/collection/CollUtil.java
@@ -397,6 +397,10 @@ public class CollUtil {
 	 * @return 单差集
 	 */
 	public static <T> Collection<T> subtract(final Collection<T> coll1, final Collection<T> coll2) {
+		if(isEmpty(coll1) || isEmpty(coll2)){
+			return coll1;
+		}
+
 		Collection<T> result = ObjUtil.clone(coll1);
 		if (null == result) {
 			result = CollUtil.create(coll1.getClass());