SafeVarargs (#113)

Author: realDuYuanChao

src/main/java/com/examplehub/datastructures/linkedlist/SinglyLinkedList.java

@@ -60,7 +60,8 @@ public void insertHead(E data) {
  *
  * @param items the items to be inserted.
  */
- public void insertHead(E... items) {
+ @SafeVarargs
+ public final void insertHead(E... items) {
  for (E item : items) {
  insertHead(item);
  }
@@ -80,7 +81,8 @@ public void insertTail(E data) {
  *
  * @param items the items to be inserted.
  */
- public void insertTail(E... items) {
+ @SafeVarargs
+ public final void insertTail(E... items) {
  for (E item : items) {
  insertTail(item);
  }