java 基础新特性

public class  {
    public static void main(String[] args) {
    
        System.out.println(add());
        System.out.println(add(1, 2));
        System.out.println(add(1, 2, 3, 4, 5));
        System.out.println(add(new int[] { 1, 2, 4, 5, 6, 7 }));
    }
    public static int add(int... data) {
        int sum = 0;
        for (int i = 0; i < data.length; i++) {
            sum += data[i];
        }
        return sum;
    }
}