Array and List in Java

In Java, Array and List have a lot in common. Now I am going to introduce how to convert them to each other.

---

How to convert List to Array?

List<T> list = new ArrayList<T>();
T [] array = list.toArray(new T[list.size()]);

---

How to convert Array to List?

There are two ways to convert Array to List.

• Flexible Length Way (Recommended)

  List list = new ArrayList(Arrays.asList(array));

The above is recommended because it returns an ArrayList which has flexible length (you can add extra elements).

• Easy but Inflexible Way

  List list = Arrays.asList(array);

---

The End

---