diff --git a/hutool-core/src/main/java/cn/hutool/core/stream/EasyStream.java b/hutool-core/src/main/java/cn/hutool/core/stream/EasyStream.java
index 44d5db66d..52b4e392c 100644
--- a/hutool-core/src/main/java/cn/hutool/core/stream/EasyStream.java
+++ b/hutool-core/src/main/java/cn/hutool/core/stream/EasyStream.java
@@ -1181,11 +1181,9 @@ public class EasyStream<T> implements Stream<T>, Iterable<T> {
 	 * @param idx 下标
 	 * @return 指定下标的元素
 	 */
+	@SuppressWarnings("unchecked")
 	public Optional<T> at(final Integer idx) {
-		return Opt.ofNullable(idx).map(i -> {
-			//noinspection unchecked
-			return (T) ArrayUtil.get(toArray(), i);
-		}).toOptional();
+		return Opt.ofNullable(idx).map(i -> (T) ArrayUtil.get(toArray(), i)).toOptional();
 	}
 
 	/**
diff --git a/hutool-core/src/main/java/cn/hutool/core/util/ArrayUtil.java b/hutool-core/src/main/java/cn/hutool/core/util/ArrayUtil.java
index 1cfaac9e2..330802f70 100755
--- a/hutool-core/src/main/java/cn/hutool/core/util/ArrayUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/util/ArrayUtil.java
@@ -1025,7 +1025,7 @@ public class ArrayUtil extends PrimitiveArrayUtil {
 		if (null == array) {
 			return null;
 		}
-		if(null == indexes){
+		if (null == indexes) {
 			return newArray(array.getClass().getComponentType(), 0);
 		}
 
@@ -1553,6 +1553,7 @@ public class ArrayUtil extends PrimitiveArrayUtil {
 	 * 是否存在{@code null}或空对象，通过{@link ObjUtil#isEmpty(Object)} 判断元素<br>
 	 * 如果提供数组本身为空，
 	 *
+	 * @param <T>  元素类型
 	 * @param args 被检查对象
 	 * @return 是否存在
 	 * @since 4.5.18