ProductClass

public class Product implements Comparable<Product>{
    private String name;
    private double price;

    public Product(String name, double price){
        this.name = name;
        this.price = price;
    }

    public String getName(){
        return name;
    }

    public double getPrice(){
        return price;
    }

    public int compareTo(Product compareFruit) {

        double otherPrice = ((Product) compareFruit).getPrice();

        //ascending order
        if(this.price>otherPrice) return 1;
        else
        if(this.price==otherPrice) return 0;
        return -1;
    }
}