how to create arraylist of object and how to take value for object code example

Example 1: arraylist with values java

ArrayList<String> cities = new ArrayList<>(Arrays.asList("London", "Tokyo", "New York"));

Example 2: java arraylist declaration

ArrayList<E> yourArray = new ArrayList<E>();

//'E' can be raplaced with any data type or object, or left as 
// E if used for general funcitonality