package com.company.DaYuanXue;
import java.util.ArrayList;
import java.util.Random;
public class ArrayListDemo03 {
public static void main(String[] args) {
ArrayList<Integer> bigList= new ArrayList<>();
Random random = new Random();
for (int i = 0; i < 20; i++) {
int a = random.nextInt(100);
bigList.add(a);
}
ArrayList<Integer> smallList = getSmallList(bigList);
System.out.println("偶数的个数有:"+ smallList.size());
for (int i1 = 0; i1 < smallList.size(); i1++) {
System.out.println(smallList.get(i1));
}
}
public static ArrayList<Integer> getSmallList(ArrayList<Integer> bigList){
ArrayList<Integer> smallList = new ArrayList<>();
for (int i = 0; i < bigList.size(); i++) {
int num = bigList.get(i);
if (num%2 == 0){
smallList.add(num);
}
}
return smallList;
}
}