/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
class Product {
 
}
 
class Order{
     public List<Product> products = java.util.Arrays.asList(new Product[4]); 
}
 
/* Name of the class has to be "Main" only if the class is public. */
class Main
{
	public static void main (String[] args) throws java.lang.Exception
	{
		Order o = new Order();
		o.products.set(0, new Product());
		System.out.println(o.products);
		o.products.add(new Product()); // throws UnsuportedOperationException
	}
}

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