1 /**
 2  * @Auther: lzy
 3  * @Date: 2018/12/12 16:07
 4  * @Description: 集合巢狀儲存和遍歷元素的示例
 5  */
 6 public class ListTest {
 7     public static void main(String[] args) {
 8         //建立大集合
 9         ArrayList<ArrayList<Student>> bigArrayList = new ArrayList<ArrayList<Student>>();
 
10         //建立第一個小集合
11         ArrayList<Student> firstArrayList = new ArrayList<Student>();
12         //建立學生
13         Student s1 = new Student("fff",22);
14         Student s2 = new Student("hhh",21);
15         Student s3 = new Student("nnn",20);
16         //把學生儲存到第一個小集合中
17         firstArrayList.add(s1);
 
18         firstArrayList.add(s2);
19         firstArrayList.add(s3);
20         //把第一個小集合儲存到大集合中
21         bigArrayList.add(firstArrayList);
22         //建立第二個小集合
23         ArrayList<Student> secondArrayList = new ArrayList<Student>();
24         Student s21 = new Student("sss",22);
25         Student s22 = new
 
 Student("xxx",21);
26         Student s23 = new Student("zzz",20);
27         secondArrayList.add(s21);
28         secondArrayList.add(s22);
29         secondArrayList.add(s23);
30         bigArrayList.add(secondArrayList);
31         //遍歷大集合
32         for (ArrayList<Student> arrayList:bigArrayList){
33             //遍歷小集合
34             for (Student s:arrayList){
35                 System.out.println(s.getName()+","+s.getAge());
36             }
37 
38         }
39 
40 
41     }
42 }