Java:如何使用方法计算ArrayList中出现的次数

import java.util.ArrayList;
import java.util.Collections;

public class Main {
    public static void main(String[] args) {
        ArrayList<Integer> list = new ArrayList<>();
        list.add(1);
        list.add(2);
        list.add(3);
        list.add(2);
        list.add(2);

        int count = countOccurrences(list, 2);
        System.out.println("元素2在ArrayList中出现的次数为：" + count);
    }

    public static int countOccurrences(ArrayList<Integer> list, int target) {
        return Collections.frequency(list, target);
    }
}

元素2在ArrayList中出现的次数为：3