1 /** 2 * @Auther: lzy 3 * @Date: 2018/12/12 16:07 4 * @Description: 集合嵌套存儲和遍歷元素的示例 5 */ 6 public class ListTest { 7 public static void main(String[] args) { 8 //創(chuàng)建大集合 9 ArrayList<ArrayList<Student>> bigArrayList = new ArrayList<ArrayList<Student>>(); 10 //創(chuàng)建第一個小集合 11 ArrayList<Student> firstArrayList = new ArrayList<Student>(); 12 //創(chuàng)建學生 13 Student s1 = new Student("fff",22); 14 Student s2 = new Student("hhh",21); 15 Student s3 = new Student("nnn",20); 16 //把學生存儲到第一個小集合中 17 firstArrayList.add(s1); 18 firstArrayList.add(s2); 19 firstArrayList.add(s3); 20 //把第一個小集合存儲到大集合中 21 bigArrayList.add(firstArrayList); 22 //創(chuàng)建第二個小集合 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 }

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轉載于:https://www.cnblogs.com/lzy-417/p/10109201.html

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