在Java中对数组进行操作不是线程安全的.相反，您可以将ArrayList与Collections.synchronizedList()

Operation on array in java is not thread safe. Instead you may use ArrayList with Collections.synchronizedList()

假设我们正在尝试填充String的同步ArrayList.然后，您可以将项目添加到列表中，例如-

Suppose we are trying to populate a synchronized ArrayList of String. Then you can add item to the list like -

List<String> list = 
         Collections.synchronizedList(new ArrayList<String>());

       //Adding elements to synchronized ArrayList
       list.add("Item1");
       list.add("Item2");
       list.add("Item3"); 

然后从这样的synchronized块访问它们-

Then access them from a synchronized block like this -

synchronized(list) {
       Iterator<String> iterator = list.iterator(); 
       while (iterator.hasNext())
       System.out.println(iterator.next());
}  

或者您可以使用ArrayList的线程安全变体-此处一个>.

Or you may use a thread safe variant of ArrayList - CopyOnWriteArrayList. A good example can be found here.

希望这会有所帮助.