java - 使用迭代器从 List 中获取数据

Question

我正在尝试使用列表但使用迭代器来获取数据。它正在向我展示该物体。我怎样才能从中获取数据？

import java.util.*;
    class Getter_Setter
    {
        int id;
        String name;
        public List<Getter_Setter> buckets;
        public String getName()
        {
            return name;
        }
        public int getId()
        {
            return id;
        }
        public void setId(int id)
        {
            this.id=id;
        }
        public void setName(String name)
        {
            this.name=name;
        }
        public void setGetter_Setter(List<Getter_Setter> buck)
        {
            this.buckets=buck;
        }
    }
    class Simple
    {
        public static void main(String arg[])
        {
            run();
        }
        public static void run()
        {

            List<Getter_Setter> getList=sum();
            Iterator itr=getList.iterator();
            while(itr.hasNext())
            {
                System.out.println(itr.next());
            }
        }
        public static List<Getter_Setter> sum()
        {
            List<Getter_Setter> list=new ArrayList<Getter_Setter>();
            Getter_Setter get=new Getter_Setter();
            get.setId(30);
            get.setName("Hanish");

            System.out.println(get.getId());
            System.out.println(get.getName());
            list.add(get);
            return  list;
        }
    }

Answer 1

您的sum方法返回类型化的 List<Getter_Setter> ，因此您可以从中获取强类型迭代器:

List<Getter_Setter> getList = sum();
Iterator itr<Getter_Setter> = getList.iterator();

这允许您直接检索Getter_Setter元素，您可以在其上调用 getId()和getName()方法:

Iterator<Getter_Setter> itr = getList.iterator();
while (itr.hasNext()) {
    Getter_Setter item = its.next();
    System.out.println(item.getId());
    System.out.println(item.getName());
}