import java.util.Scanner;
class Product{
    
    //Class attributes
    private String name;
    private double price;
    private int score; 
    
    public Product() {
        name = "";
        score = 0; 
        price = 1;
    }
    
    public void printData(){
        System.out.println("Name: " + name);
        System.out.println("Price: " + price);
        System.out.println("Score: " + score);
    }
    
    
    public void read() {
        
        Scanner in  = new Scanner(System.in);
        
        System.out.println("Product name: ");
        String name = in.nextLine(); 
        System.out.println("Price: ");
        double price = in.nextDouble();
        System.out.println("Score: ");
        int core = in.nextInt();
    }
    
    public boolean is_better_than(Product other) {
        
        if (score/price > other.score/other.price)
            return true;
         
        return false;
        
    }
}
public class Main {
    public static void main(String[] args) {
 
        Scanner in  = new Scanner(System.in);
        
        Product best = new Product();
        
        boolean more = true;
        while(more) {
            
            
            Product current = new Product();
            
            current.read(); // 
            if (current.is_better_than(best)) {
                best = current;
            }
                            
            System.out.println("More Products? 1:YES, 2:NO");
            int answer  = in.nextInt();
            if (answer != 1)
                more = false;
            in.nextLine();
        
        }
        
        best.printData(); 
    }
}

字符集
当我输入一个名字，一个分数和一个价格，它显示什么价格的变量被赋予在begining的programm，而不是新的