diff --git a/app/src/main/java/io/legado/app/lib/icu4j/CharsetDetector.java b/app/src/main/java/io/legado/app/lib/icu4j/CharsetDetector.java
index 8432cb005..a2da7a174 100644
--- a/app/src/main/java/io/legado/app/lib/icu4j/CharsetDetector.java
+++ b/app/src/main/java/io/legado/app/lib/icu4j/CharsetDetector.java
@@ -1,10 +1,10 @@
 // © 2016 and later: Unicode, Inc. and others.
 // License & terms of use: http://www.unicode.org/copyright.html
-/**
- * ******************************************************************************
- * Copyright (C) 2005-2016, International Business Machines Corporation and    *
- * others. All Rights Reserved.                                                *
- * ******************************************************************************
+/*
+  ******************************************************************************
+  Copyright (C) 2005-2016, International Business Machines Corporation and    *
+  others. All Rights Reserved.                                                *
+  ******************************************************************************
  */
 package io.legado.app.lib.icu4j;
 
@@ -332,7 +332,7 @@ public class CharsetDetector {
      *               it by removing what appears to be html markup.
      */
     private void MungeInput() {
-        int srci = 0;
+        int srci;
         int dsti = 0;
         byte b;
         boolean inMarkup = false;
@@ -496,6 +496,7 @@ public class CharsetDetector {
         list.add(new CSRecognizerInfo(new CharsetRecog_sbcs.CharsetRecog_IBM420_ar_rtl(), false));
         list.add(new CSRecognizerInfo(new CharsetRecog_sbcs.CharsetRecog_IBM420_ar_ltr(), false));
 
+        //noinspection Java9CollectionFactory
         ALL_CS_RECOGNIZERS = Collections.unmodifiableList(list);
     }