JAVA可变参数实例

public class Kebiancanshu {

    public static void main(String[] args) {

        System.out.println(average(8, 2, 3, 4, 5, 6, 7, 8, 1));
        System.out.println(average(3,5,6,7));

    }

    public static double average(int n,int... nums) {
        int sum = 0;

        for (int num : nums) {
            sum += num;
        }

        return (double)sum / nums.length;
    }
}

n表示可变参数的个数，个数不确定的情况下，average参数可以只有可变参数数组，average(int...nums).

JAVA1.5版本以后支持可变参数。