public class GroupBuy {

    // 商品信息 
    private String name; // 商品名称 
    private int price; // 商品价格 
    private int number; // 团购人数 

    public GroupBuy(String name, int price, int number) { 
        this.name = name; 
        this.price = price; 
        this.number = number; 
    }

    public String getName() { return name; }

    public void setName(String name) { this.name = name; }

    public int getPrice() { return price;}

    public void setPrice(int price) { this.price = price;}

      public int getNumber() { return number;}

      public void setNumber(int number) {this.number = number;}

      // 计算团购价格的方法，满10人减5元，满20人减10元，依此类推。 
      public double groupBuyPrice(){