java119-set类

public class Goods {
     //商品实体类
     private String number;//商品编号
     private String name;//商品价格
     private  double price;//商品单价
     private  int quantity;//商品数量
  
     public void setNumber(String number) {
         this.number = number;
     }
     public String getNumber() {
         return number;
     }
  
     public void setName(String name) {
         this.name = name;
     }
     public String getName() {
         return name;
     }
     public void setPrice(double price) {
         this.price = price;
     }
     public double getPrice() {
         return price;
     }
     public void setQuantity(int quantity) {
         this.quantity = quantity;
     }
     public int getQuantity() {
         return quantity;
     }
 }
 测试结果import java.util.HashSet;
 import java.util.Iterator;
 import java.util.Set;
 import java.util.UUID;
  
 //set接口
 public class test59 {
     public static void main(String[] args){
         //Set goodsset=new HashSet(18);//初始容量，不够用会自动扩展
         Set goodsset=new HashSet(16);
         Goods goods0=new Goods();
         goods0.setName("肥皂");
         goods0.setNumber(UUID.randomUUID().toString());
         goods0.setQuantity(20000);
  
         Goods goods1=new Goods();
         goods1.setName("洗发水");
         goods1.setNumber(UUID.randomUUID().toString());
         goods1.setQuantity(20000);
  
         Goods goods2=new Goods();
         goods2.setName("运动鞋");
         goods2.setNumber(UUID.randomUUID().toString());
         goods2.setQuantity(20000);
  
  
  
         goodsset.add(goods2);
         goodsset.add(goods1);
         goodsset.add(goods0);
        // goodsset.add(goods3);
  
         Iterator iterator=goodsset.iterator();
         while(iterator.hasNext()){
             Goods g=(Goods)iterator.next();
             System.out.println(g.getName()+"\t"+g.getNumber()+"\t"+g.getQuantity());
         }
     }
 }