这里有什么问题?我收到 java.lang.ClassCastException 错误，但看不到哪里出错了

2022-01-21 00:00:00 queue arraylist java classcastexception

这是我第一次真正使用列表和队列，所以这可能是一个非常简单的错误.是因为我的队列中充满了无法转换为整数的对象吗?

This is the first time I have really used Lists and Queues so this might be a very simple mistake. Is it because my queue is full of objects that can't be cast to integers? 

           //populate array
        for(int i=0; i<11; i++){
            numberarray[i] = i; 
        }
        // populate list with numbers from array
        List numList = Arrays.asList(numberarray);
        Collections.shuffle(numList);

        Queue queue = new LinkedList();
        queue.addAll(numList);

        int num1 = (Integer) queue.poll();
        assignPictures(button01, num1);

推荐答案

你真的应该使用泛型和 ArrayList/ArrayDeque，除非它对性能非常关键，并且你使用了很多原子类型，比如 int.那你应该看看http://labs.carrotsearch.com/hppc.html

You really should use Generics and ArrayList/ArrayDeque unless it's really performance critical and you use a lot of atomic types like int. Then you should have a look at http://labs.carrotsearch.com/hppc.html

相关文章