如何在不获取ConcurrentModificationException的情况下，通过线程将对象添加到列表中，同时使用列表？

import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;

public class ThreadSafeListExample {
    private List<Object> list = new CopyOnWriteArrayList<>();

    public void addObject(Object obj) {
        list.add(obj);
    }

    public void printList() {
        for (Object obj : list) {
            System.out.println(obj);
        }
    }
}

import java.util.ArrayList;
import java.util.List;

public class ThreadSafeListExample {
    private List<Object> list = new ArrayList<>();

    public void addObject(Object obj) {
        synchronized (list) {
            list.add(obj);
        }
    }

    public void printList() {
        synchronized (list) {
            for (Object obj : list) {
                System.out.println(obj);
            }
        }
    }
}