Java 商品类 Item：构造器、属性和商品数量统计

public class Item {\n private String code;\n private String name;\n private String type;\n private double price;\n private static int totalNum = 0;\n \n public Item() {\n totalNum++;\n }\n \n public Item(String code, String name) {\n this.code = code;\n this.name = name;\n totalNum++;\n }\n \n public String getCode() {\n return code;\n }\n \n public void setCode(String code) {\n this.code = code;\n }\n \n public String getName() {\n return name;\n }\n \n public void setName(String name) {\n this.name = name;\n }\n \n public String getType() {\n return type;\n }\n \n public void setType(String type) {\n this.type = type;\n }\n \n public double getPrice() {\n return price;\n }\n \n public void setPrice(double price) {\n this.price = price;\n }\n \n public static int getTotalNum() {\n return totalNum;\n }\n \n public static void setTotalNum(int totalNum) {\n Item.totalNum = totalNum;\n }\n \n public static void main(String[] args) {\n Item computer1 = new Item("666", "戴尔(DELL) 游戏笔记本");\n computer1.setType("游戏");\n computer1.setPrice(5499.00);\n \n Item computer2 = new Item("007", "苹果（Macbook pro）笔记本");\n computer2.setType("电脑,办公");\n computer2.setPrice(18000.00);\n \n System.out.println("商品1名称: " + computer1.getName());\n System.out.println("商品1价格: " + computer1.getPrice());\n \n System.out.println("商品2名称: " + computer2.getName());\n System.out.println("商品2价格: " + computer2.getPrice());\n \n System.out.println("总商品数量: " + Item.getTotalNum());\n }\n}