Create Map in Java

Question

I'd like to create a map that contains entries consisting of (int, Point2D)

How can I do this in Java?

I tried the following unsuccessfully.

HashMap hm = new HashMap();  hm.put(1, new Point2D.Double(50, 50)); 

Answer 1

Map <Integer, Point2D.Double> hm = new HashMap<Integer, Point2D>(); hm.put(1, new Point2D.Double(50, 50)); 

Answer 2

Java 9

public static void main(String[] args) {     Map<Integer,String> map = Map.ofEntries(entry(1,"A"), entry(2,"B"), entry(3,"C")); }