diff --git a/catvod/src/main/java/com/github/catvod/utils/Prefers.java b/catvod/src/main/java/com/github/catvod/utils/Prefers.java
index 91d0bdcc8..3927090f8 100644
--- a/catvod/src/main/java/com/github/catvod/utils/Prefers.java
+++ b/catvod/src/main/java/com/github/catvod/utils/Prefers.java
@@ -73,8 +73,7 @@ public class Prefers {
             getPrefers().edit().putInt(key, (Integer) obj).apply();
         } else if (obj instanceof Long) {
             getPrefers().edit().putLong(key, (Long) obj).apply();
-        } else if (obj instanceof LazilyParsedNumber) {
-            LazilyParsedNumber number = (LazilyParsedNumber) obj;
+        } else if (obj instanceof LazilyParsedNumber number) {
             if (number.toString().contains(".")) put(key, number.floatValue());
             else put(key, number.intValue());
         }
diff --git a/quickjs/src/main/java/com/fongmi/quickjs/utils/Connect.java b/quickjs/src/main/java/com/fongmi/quickjs/utils/Connect.java
index 74d8b801c..1b74f7baf 100644
--- a/quickjs/src/main/java/com/fongmi/quickjs/utils/Connect.java
+++ b/quickjs/src/main/java/com/fongmi/quickjs/utils/Connect.java
@@ -85,7 +85,7 @@ public class Connect {
     }
 
     private static RequestBody getFormDataBody(Req req) {
-        String boundary = "--dio-boundary-" + new SecureRandom().nextInt(42949) + "" + new SecureRandom().nextInt(67296);
+        String boundary = "--dio-boundary-" + new SecureRandom().nextInt(42949) + new SecureRandom().nextInt(67296);
         MultipartBody.Builder builder = new MultipartBody.Builder(boundary).setType(MultipartBody.FORM);
         Map<String, String> params = Json.toMap(req.getData());
         for (String key : params.keySet()) builder.addFormDataPart(key, params.get(key));
diff --git a/quickjs/src/main/java/com/fongmi/quickjs/utils/Crypto.java b/quickjs/src/main/java/com/fongmi/quickjs/utils/Crypto.java
index 44357c97d..809c2d840 100644
--- a/quickjs/src/main/java/com/fongmi/quickjs/utils/Crypto.java
+++ b/quickjs/src/main/java/com/fongmi/quickjs/utils/Crypto.java
@@ -4,6 +4,7 @@ import android.util.Base64;
 
 import com.github.catvod.utils.Util;
 
+import java.nio.charset.StandardCharsets;
 import java.security.Key;
 import java.security.KeyFactory;
 import java.security.PublicKey;
@@ -38,8 +39,8 @@ public class Crypto {
             SecretKeySpec keySpec = new SecretKeySpec(keyBuf, "AES");
             if (iv == null) cipher.init(encrypt ? Cipher.ENCRYPT_MODE : Cipher.DECRYPT_MODE, keySpec);
             else cipher.init(encrypt ? Cipher.ENCRYPT_MODE : Cipher.DECRYPT_MODE, keySpec, new IvParameterSpec(ivBuf));
-            byte[] inBuf = inBase64 ? Base64.decode(input.replaceAll("_", "/").replaceAll("-", "+"), Base64.DEFAULT) : input.getBytes("UTF-8");
-            return outBase64 ? Base64.encodeToString(cipher.doFinal(inBuf), Base64.NO_WRAP) : new String(cipher.doFinal(inBuf), "UTF-8");
+            byte[] inBuf = inBase64 ? Base64.decode(input.replaceAll("_", "/").replaceAll("-", "+"), Base64.DEFAULT) : input.getBytes(StandardCharsets.UTF_8);
+            return outBase64 ? Base64.encodeToString(cipher.doFinal(inBuf), Base64.NO_WRAP) : new String(cipher.doFinal(inBuf), StandardCharsets.UTF_8);
         } catch (Exception e) {
             e.printStackTrace();
             return "";
@@ -51,7 +52,7 @@ public class Crypto {
             Key rsaKey = generateKey(pub, key);
             int len = getModulusLength(rsaKey);
             byte[] outBytes = new byte[0];
-            byte[] inBytes = inBase64 ? Base64.decode(input.replaceAll("_", "/").replaceAll("-", "+"), Base64.DEFAULT) : input.getBytes("UTF-8");
+            byte[] inBytes = inBase64 ? Base64.decode(input.replaceAll("_", "/").replaceAll("-", "+"), Base64.DEFAULT) : input.getBytes(StandardCharsets.UTF_8);
             Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
             cipher.init(encrypt ? Cipher.ENCRYPT_MODE : Cipher.DECRYPT_MODE, rsaKey);
             int blockLen = encrypt ? len / 8 - 11 : len / 8;
@@ -64,7 +65,7 @@ public class Crypto {
                 bufIdx = bufEndIdx;
                 outBytes = concatArrays(outBytes, tmpBytes);
             }
-            return outBase64 ? Base64.encodeToString(outBytes, Base64.NO_WRAP) : new String(outBytes, "UTF-8");
+            return outBase64 ? Base64.encodeToString(outBytes, Base64.NO_WRAP) : new String(outBytes, StandardCharsets.UTF_8);
         } catch (Exception e) {
             e.printStackTrace();
             return "";