Answer 1

List is an interface where ArrayList is a class that implements the List interface (this is why ArrayList has the List methods). This means List cannot be instantiated.

This is not valid!
import java.util.*;

public class Program
{
public static void main(String[] args) {
List<String> list = new List<>(); // error
list.add("try");
list.add("again");
}
}

More info:

https://techdifferences.com/difference-between-list-and-arraylist-in-java.html

https://docs.oracle.com/javase/8/docs/api/java/util/List.html

https://docs.oracle.com/javase/8/docs/api/java/util/ArrayList.html

Answer 2

Standard Java arrays are of fixed length, which means that once they are created, they cannot be expanded or shrunk.

On the other hand, ArrayList classes are created with the original size, but if the size is exceeded, the collection is automatically increased.

When objects are removed, the ArrayList may shrink in size. Note that the ArrayList class is in the java.util package, so you must import it before using it.

Answer 3

there is a vast difference between list and arraylist that are not similar list is mainly used for listing the number of elements in a program where as arraylist this used to Les De dynamic elements of the array