From 9a078396cde9740c1b841b82978be43ffa82ffe8 Mon Sep 17 00:00:00 2001
From: ZhouXY108 <luquanlion@outlook.com>
Date: Wed, 28 Jun 2023 01:29:37 +0800
Subject: [PATCH] fix bugs.

---
 .../java/xyz/zhouxy/plusone/commons/util/MoreCollections.java | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/main/java/xyz/zhouxy/plusone/commons/util/MoreCollections.java b/src/main/java/xyz/zhouxy/plusone/commons/util/MoreCollections.java
index 5ad4142..1efca6a 100644
--- a/src/main/java/xyz/zhouxy/plusone/commons/util/MoreCollections.java
+++ b/src/main/java/xyz/zhouxy/plusone/commons/util/MoreCollections.java
@@ -60,7 +60,7 @@ public class MoreCollections {
         return toConcurrentHashMap(c, keyGenerator, c.size());
     }
 
-    public static <K, V> TreeMap<K, V> toTreeMap(Iterable<V> c, Function<? super V, K> keyGenerator) {
+    public static <K extends Comparable<? super K>, V> TreeMap<K, V> toTreeMap(Iterable<V> c, Function<? super V, K> keyGenerator) {
         TreeMap<K, V> map = new TreeMap<>();
         fillIntoEmptyMap(map, c, keyGenerator);
         return map;
@@ -106,7 +106,7 @@ public class MoreCollections {
         return toConcurrentHashMap(c, keyGenerator, c.length);
     }
 
-    public static <K, V> TreeMap<K, V> toTreeMap(V[] c, Function<? super V, K> keyGenerator) {
+    public static <K extends Comparable<? super K>, V> TreeMap<K, V> toTreeMap(V[] c, Function<? super V, K> keyGenerator) {
         TreeMap<K, V> map = new TreeMap<>();
         fillIntoEmptyMap(map, c, keyGenerator);
         return map;