From 49a5efff46ec604578d6cb98015a8700bdf1fa21 Mon Sep 17 00:00:00 2001
From: Joe Zhou <zhoushuqun@gmail.com>
Date: Tue, 4 Jun 2024 01:02:45 +0800
Subject: [PATCH] Add a private constructor to hide the implicit public one.

---
 .../main/java/us/codecraft/webmagic/utils/CharsetUtils.java   | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/webmagic-core/src/main/java/us/codecraft/webmagic/utils/CharsetUtils.java b/webmagic-core/src/main/java/us/codecraft/webmagic/utils/CharsetUtils.java
index ccf00a4..63bb4c1 100644
--- a/webmagic-core/src/main/java/us/codecraft/webmagic/utils/CharsetUtils.java
+++ b/webmagic-core/src/main/java/us/codecraft/webmagic/utils/CharsetUtils.java
@@ -21,6 +21,10 @@ public abstract class CharsetUtils {
 
     private static Logger logger = LoggerFactory.getLogger(CharsetUtils.class);
 
+    private CharsetUtils() {
+        throw new AssertionError("No us.codecraft.webmagic.utils.CharsetUtils instances for you!");
+    }
+
     public static String detectCharset(String contentType, byte[] contentBytes) throws IOException {
         String charset;
         // charset