题目链接

346. 数据流中的移动平均值

思路

队列设计基础题

代码

class MovingAverage {
    private Integer currentSum = 0;
    private Queue<Integer> queue = new LinkedList<>();
    private int size;

    public MovingAverage(int size) {
        this.size = size;
    }

    public double next(int val) {
        queue.offer(val);
        currentSum += val;

        if(queue.size() > this.size){
            currentSum -= queue.remove();
        }

        return 1.0 * currentSum / queue.size();
    }
}