Scanner实现求和和均值

public static void main(String[] args) {
    //输入多个数字，求和和平均数
    Scanner scanner = new Scanner(System.in);
    double sum = 0;
    int m = 0;
    //当输入的不是一个double类型就会结束循环
    while (scanner.hasNextDouble()){
        double x = scanner.nextDouble();
        sum += x;
        m++;
    }
    System.out.println(m + "个数的和" + sum);
    System.out.println(m + "个数的平均值为" + (sum / m));
    scanner.close();
    /*控制台如下
    10
    20
    30
    kk
    3个数的和60.0
    3个数的平均值为20.0
     */
}