Impl.java

package com.cb;
import java.util.Map;

public class Impl {
    public static void main(String[] args) {
        //Immutable
        Map map = Map.of(1, "Sunday", 2, "Monday", 3, "Tuesday");
        System.out.println(map); // {1=Sunday, 2=Monday, 3=Tuesday}
    }
}