import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

interface FilterString {
	public List<Item> filter(List<Item> items, String category);
}

interface FilterInteger {
	public List<Item> filter(List<Item> items, Integer price);
}

interface Filter<T> {
	public List<Item> filter(List<Item> items, T filter);
}

class Item {
	private String name;
	private int price;
	private List<String> categories;
	
	public String getName() { return name; }
	public Integer getPrice() { return price; }
	public List<String> getCategories() { return categories; }
	
	Item(String name, Integer price, List<String> categories) {
		this.name = name; 
		this.price = price;
		this.categories = categories;
	}
}

public class Main {
	public static void main(String []args) {
		List<Item> itemList = Arrays.asList(
				new Item[]{
					new Item("Webcam", 27, Arrays.asList("Accessory", "Multimedia")),
					new Item("Core i5", 99, Arrays.asList("Component", "CPU")),
					new Item("Core i7", 199, Arrays.asList("Component", "CPU")),
					new Item("Core i9", 299, Arrays.asList("Component", "CPU")),
					new Item("Asus H310", 149, Arrays.asList("Component", "MB")),
					new Item("Asus H510", 95, Arrays.asList("Component", "MB")),
					new Item("GB2 Pro 13", 1149, Arrays.asList("Notebook")),
					new Item("Book Air", 1349, Arrays.asList("Notebook")),
					new Item("ADA", 1349, Arrays.asList("Notebook")),
				});
		
		MyFilter f = new MyFilter(); 

        // filter and print
        
        List<Item> result = f.filter(itemList, "CPU");
        System.out.println(result);

		
	}
}