How to work with arraylist in java?

The ArrayList class provides a resizable array and implements the List interface.

Example:

  ArrayList names = new ArrayList<>();
  names.add("Alice");
  names.add("Bob");
  names.add("Charlie");
  System.out.println(names.get(0));  // Outputs: Alice
  

Solution:

Other ArrayList methods:

  names.remove("Bob");
  names.size();  // Returns: 2