From a0cba2fd55a42ce899084871a456f7d5ca55c68b Mon Sep 17 00:00:00 2001
From: Looly <loolly@gmail.com>
Date: Sun, 15 Jan 2023 11:01:28 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E5=A4=8DHexUtil.isHexNumber()?=
 =?UTF-8?q?=E5=AF=B9"-"=E7=9A=84=E5=88=A4=E6=96=AD=E9=97=AE=E9=A2=98?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 CHANGELOG.md                                                | 3 ++-
 hutool-core/src/main/java/cn/hutool/core/util/HexUtil.java  | 6 +++++-
 .../src/test/java/cn/hutool/core/util/HexUtilTest.java      | 4 ++++
 3 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index d0c658db7..ccb2e82b2 100755
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,10 +3,11 @@
 
 -------------------------------------------------------------------------------------------------------------
 
-# 5.8.12.M1 (2022-12-27)
+# 5.8.12.M1 (2023-01-15)
 
 ### 🐣新特性
 ### 🐞Bug修复
+* 【core  】      修复HexUtil.isHexNumber()对"-"的判断问题（issue#2857@Github）
 
 -------------------------------------------------------------------------------------------------------------
 
diff --git a/hutool-core/src/main/java/cn/hutool/core/util/HexUtil.java b/hutool-core/src/main/java/cn/hutool/core/util/HexUtil.java
index 5a04f270e..8d9dda219 100755
--- a/hutool-core/src/main/java/cn/hutool/core/util/HexUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/util/HexUtil.java
@@ -27,7 +27,11 @@ public class HexUtil {
 	 * @return 是否为16进制
 	 */
 	public static boolean isHexNumber(String value) {
-		int index = (value.startsWith("-") ? 1 : 0);
+		if(StrUtil.startWith(value, '-')){
+			// issue#2875
+			return false;
+		}
+		int index = 0;
 		if (value.startsWith("0x", index) || value.startsWith("0X", index)) {
 			index += 2;
 		} else if (value.startsWith("#", index)) {
diff --git a/hutool-core/src/test/java/cn/hutool/core/util/HexUtilTest.java b/hutool-core/src/test/java/cn/hutool/core/util/HexUtilTest.java
index 161266c72..095381842 100755
--- a/hutool-core/src/test/java/cn/hutool/core/util/HexUtilTest.java
+++ b/hutool-core/src/test/java/cn/hutool/core/util/HexUtilTest.java
@@ -49,6 +49,10 @@ public class HexUtilTest {
 		// 错误的
 		a = "0x0000001000T00001158e460913d00000";
 		Assert.assertFalse(HexUtil.isHexNumber(a));
+
+		// 错误的,https://github.com/dromara/hutool/issues/2857
+		a = "-1";
+		Assert.assertFalse(HexUtil.isHexNumber(a));
 	}
 
 	@Test