集合类遍历时正确删除元素

 

public class Test {
    public static void main(String[] args) {
        List<String> list = new ArrayList<>();
        list.add("aaa");
        list.add("bbb");
        list.add("ccc");
        Iterator<String> iterator = list.iterator();
        while(iterator.hasNext()) {
            String next = iterator.next();
            if("aaa".equals(next)) {
                iterator.remove(); //正确删除
                // list.remove(next); //抛出ConcurrentModificationException
            }
            System.out.println(next);
        }
        System.out.println(list);
    }
}