What is list interface in Java?

The List interface extends Collection and declares the behavior of a collection that stores a sequence of elements.

• Elements can be inserted or accessed by their position in the list, using a zero-based index.
• A list may contain duplicate elements.
• In addition to the methods defined by Collection, List defines some of its own, which are summarized in the following table.
• Several of the list methods will throw an UnsupportedOperationException if the collection cannot be modified, and a ClassCastException is generated when one object is incompatible with another.

Example

public class CollectionsDemo {
   public static void main(String[] args) {
      List a1 = new ArrayList();
      a1.add("Zara");
      a1.add("Mahnaz");
      a1.add("Ayan");
      System.out.println(" ArrayList Elements");
      System.out.print("\t" + a1);
      List l1 = new LinkedList();
      l1.add("Zara");
      l1.add("Mahnaz");
      l1.add("Ayan");
      System.out.println();
      System.out.println(" LinkedList Elements");
      System.out.print("\t" + l1);
   }
}

Output

ArrayList Elements
[Zara, Mahnaz, Ayan]
LinkedList Elements
[Zara, Mahnaz, Ayan]