學(xué)習(xí)筆記，僅供參考，有錯必糾

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ArrayList嵌套ArrayList

• 舉個例子

package com.guiyang.object;import java.sql.Array; import java.util.ArrayList;import com.guiyang.bean.People;public class Demo5_ArrayListArrayList {public static void main(String[] args) {ArrayList<ArrayList<People>> list = new ArrayList<>();ArrayList<People> first = new ArrayList<>();first.add(new People("Ada", 21));first.add(new People("Jack", 22));first.add(new People("Petty", 19));ArrayList<People> second = new ArrayList<>();second.add(new People("小白", 18));second.add(new People("小黑", 19));list.add(first);list.add(second);for (ArrayList<People> arrayList : list) {for (People people : arrayList) {System.out.println(people);} }} }

輸出：

People [name=Ada, age=21] People [name=Jack, age=22] People [name=Petty, age=19] People [name=小白, age=18] People [name=小黑, age=19]

總結(jié)

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