标签：class code tar bool get OLE return div write
List<String> list = new ArrayList<>();
使用ArrayList对数据进行赋值，会出现不同线程争抢同一资源造成写入失败问题，会抛出异常“ConcurrentModificationException”
List<String> list = new Vector<>();
List<String> list = Collections.synchronizedList(new ArrayList<>());
List<String> list = new CopyOnWriteArrayList();
#CopyOnWriteArrayList代表在写入数据时，源码执行如下
/** * Appends the specified element to the end of this list. * * @param e element to be appended to this list * @return {@code true} (as specified by {@link Collection#add}) */ public boolean add(E e) { final ReentrantLock lock = this.lock; lock.lock(); try { Object[] elements = getArray(); int len = elements.length; Object[] newElements = Arrays.copyOf(elements, len + 1); newElements[len] = e; setArray(newElements); return true; } finally { lock.unlock(); } }
标签：class code tar bool get OLE return div write
原文地址：https://www.cnblogs.com/ttyypjt/p/12601864.html
