diff --git a/entry/src/ohosTest/java/com/example/image_steganography_library_master/ExampleOhosTest.java b/entry/src/ohosTest/java/com/example/image_steganography_library_master/ExampleOhosTest.java
index 2ad35aee7209de6d47970e16ecb6476d3f41042c..22a3b203851dbcf766e695c48d83064cda9521cf 100644
--- a/entry/src/ohosTest/java/com/example/image_steganography_library_master/ExampleOhosTest.java
+++ b/entry/src/ohosTest/java/com/example/image_steganography_library_master/ExampleOhosTest.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/imagesteganographylibrary/src/main/java/com/example/imagesteganographylibrary/Utils/Crypto.java b/imagesteganographylibrary/src/main/java/com/example/imagesteganographylibrary/Utils/Crypto.java
index 61c48bd37adf4361c57aea7b62209bee6429527c..9ec081596b1314259865311ceadd50fbf274048f 100644
--- a/imagesteganographylibrary/src/main/java/com/example/imagesteganographylibrary/Utils/Crypto.java
+++ b/imagesteganographylibrary/src/main/java/com/example/imagesteganographylibrary/Utils/Crypto.java
@@ -2,12 +2,8 @@ package com.example.imagesteganographylibrary.Utils;
 
 import ohos.hiviewdfx.HiLog;
 import ohos.hiviewdfx.HiLogLabel;
-
 import javax.crypto.Cipher;
-import javax.crypto.NoSuchPaddingException;
 import javax.crypto.spec.SecretKeySpec;
-import java.security.InvalidKeyException;
-import java.security.NoSuchAlgorithmException;
 import java.util.Base64;
 
 public class Crypto {
diff --git a/imagesteganographylibrary/src/main/java/com/example/imagesteganographylibrary/Utils/ImageUtil.java b/imagesteganographylibrary/src/main/java/com/example/imagesteganographylibrary/Utils/ImageUtil.java
index f9863eae9d65387783ec4ce99923bd355ac5adbe..7fa169760a0beaa6ad60289ba28d244349668913 100644
--- a/imagesteganographylibrary/src/main/java/com/example/imagesteganographylibrary/Utils/ImageUtil.java
+++ b/imagesteganographylibrary/src/main/java/com/example/imagesteganographylibrary/Utils/ImageUtil.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/imagesteganographylibrary/src/main/java/com/example/imagesteganographylibrary/Utils/MergePixelMap.java b/imagesteganographylibrary/src/main/java/com/example/imagesteganographylibrary/Utils/MergePixelMap.java
index 1c424bc3a4775844f0af63d5687096daaa57d677..3d7df85d5338cc0c27ccd22cdbf97e48cc0fb531 100644
--- a/imagesteganographylibrary/src/main/java/com/example/imagesteganographylibrary/Utils/MergePixelMap.java
+++ b/imagesteganographylibrary/src/main/java/com/example/imagesteganographylibrary/Utils/MergePixelMap.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/imagesteganographylibrary/src/main/java/com/example/imagesteganographylibrary/Utils/ResUtils.java b/imagesteganographylibrary/src/main/java/com/example/imagesteganographylibrary/Utils/ResUtils.java
index 9498f7fbd5b84f3913e2fb4be27d7f15ebe7e3e9..c0ca71004b69866b24484e82278a1d9c7840a406 100644
--- a/imagesteganographylibrary/src/main/java/com/example/imagesteganographylibrary/Utils/ResUtils.java
+++ b/imagesteganographylibrary/src/main/java/com/example/imagesteganographylibrary/Utils/ResUtils.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/imagesteganographylibrary/src/main/java/com/example/imagesteganographylibrary/view/CircleView.java b/imagesteganographylibrary/src/main/java/com/example/imagesteganographylibrary/view/CircleView.java
index 975761239df9c4220f8fb9ec58bc3ac734c76379..8c52d212b3c89d7bacee4977e822345a2ee9650f 100644
--- a/imagesteganographylibrary/src/main/java/com/example/imagesteganographylibrary/view/CircleView.java
+++ b/imagesteganographylibrary/src/main/java/com/example/imagesteganographylibrary/view/CircleView.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *
diff --git a/imagesteganographylibrary/src/main/java/com/example/imagesteganographylibrary/view/ProgressDialog.java b/imagesteganographylibrary/src/main/java/com/example/imagesteganographylibrary/view/ProgressDialog.java
index f5f60a40234e449f31dcc9ac5ca6b9289de14fcb..535f9d9c928062ede8769241c140f64a8b41e745 100644
--- a/imagesteganographylibrary/src/main/java/com/example/imagesteganographylibrary/view/ProgressDialog.java
+++ b/imagesteganographylibrary/src/main/java/com/example/imagesteganographylibrary/view/ProgressDialog.java
@@ -2,7 +2,7 @@
  * Copyright (C) 2021 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
- * You may obtain an copy of the License at
+ * You may obtain a copy of the License at
  *
  * http://www.apache.org/licenses/LICENSE-2.0
  *