From 4204cb853236de2c3bef077ca9819cc5748cc6ce Mon Sep 17 00:00:00 2001
From: Looly <loolly@gmail.com>
Date: Wed, 7 Sep 2022 09:27:08 +0800
Subject: [PATCH] simle code

---
 hutool-core/src/main/java/cn/hutool/core/map/MapUtil.java | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/hutool-core/src/main/java/cn/hutool/core/map/MapUtil.java b/hutool-core/src/main/java/cn/hutool/core/map/MapUtil.java
index 18e643b76..240cfd09e 100755
--- a/hutool-core/src/main/java/cn/hutool/core/map/MapUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/map/MapUtil.java
@@ -1258,13 +1258,7 @@ public class MapUtil extends MapGetUtil {
 
 		final Map<K, List<V>> map = new HashMap<>();
 		for (final Map.Entry<K, V> pair : entries) {
-			final List<V> values;
-			if (map.containsKey(pair.getKey())) {
-				values = map.get(pair.getKey());
-			} else {
-				values = ListUtil.of();
-				map.put(pair.getKey(), values);
-			}
+			final List<V> values = map.computeIfAbsent(pair.getKey(), k -> new ArrayList<>());
 			values.add(pair.getValue());
 		}
 		return map;