How to make a new List in Java

Question

We create a Set as:

Set myset = new HashSet()

How do we create a List in Java?

Answer 1

List myList = new ArrayList();

or with generics (Java 7 or later)

List<MyType> myList = new ArrayList<>();

or with generics (Old java versions)

List<MyType> myList = new ArrayList<MyType>();

Hope this helps!

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Thanks!

Answer 2

Initializing a List in Java

The Java.util.List is a child interface of Collection. It is an ordered collection of objects in which duplicate values can be stored. Since List preserves the insertion order, it allows positional access and insertion of elements. List Interface is implemented by ArrayList, LinkedList, Vector, and Stack classes.

List is an interface, and the instances of List can be created in the following ways:

List a = new ArrayList();
List b = new LinkedList();
List c = new Vector(); 
List d = new Stack(); 

Examples:

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import java.util.*; import java.util.function.Supplier;    public class GFG {     public static void main(String args[])     {            // For ArrayList         List<Integer> list = new ArrayList<Integer>();         list.add(1);         list.add(3);         System.out.println("ArrayList : " + list.toString());            // For LinkedList         List<Integer> llist = new LinkedList<Integer>();         llist.add(2);         llist.add(4);         System.out.println("LinkedList : " + llist.toString());            // For Stack         List<Integer> stack = new Stack<Integer>();         stack.add(3);         stack.add(1);         System.out.println("Stack : " + stack.toString());     } }

Output:

ArrayList : [1, 3]
LinkedList : [2, 4]
Stack : [3, 1]