ArrayList的使用,删除其中为 5 的数

import java.util.*;

public class ArrayList_Operation_3 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        ArrayList<Integer> a = new ArrayList<>();

        for(int i=0 ; i<20 ; i++)
        {
            Random rand = new Random();
            int n = rand.nextInt();
            n = rand.nextInt(10);
            a.add(n);
        }
        Iterator arr = a.iterator();
        while(arr.hasNext())
        {
            int p = (int)arr.next();
            System.out.print(p+" ");
        }
        for(int i=0;i<arr.size();i++)
        {
            if(arr.get(i)==5)
            {
                  arr.remove(i);
            }
        }
        for(int i=0 ; i<3 ; i++)
        {
            Random rand = new Random();
            int n = rand.nextInt();
            n = rand.nextInt(10);
            a.add(4+i,n);
        }
    }
   
}