List interface

List interface

In this tutorial, we are going to discuss List interface in java. The List interface provides a way to store the ordered collection.

List interface
  • It is the child interface of Collection.
  • Suppose we want to represent a group of individual objects as a single entity where duplicates are allowed, and insertion order is preserved. Then we should go for List.
  • Insertion order will be preserved by means of Index.
  • We can differentiate duplicate objects and maintain insertion order using Index; hence “index plays a very important role in List.”
  • List interface defines the following specific methods.
boolean add(int index,Object o);
boolean addAll(int index,Collectio c);
Object get(int index);
Object remove(int index);
Object set(int index,Object new); //to replace
int indexOf(Object o); // Returns index of first occurrence of "o".
int lastIndexOf(Object o);
ListIterator listIterator();

List interface contains 4 classes

  1. ArrayList
  2. LinkedList
  3. VectorList
  4. Stack
List interface
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