public class DemoTest {
    public static void main(String[] args) {
       int i =  sum(1,2,3);
        System.out.println(i);

      }
//此方法可以调用1个int参数，或两个int参数，或多个int参数
    public static int sum(int... numbers){
        int sum = 0;
        for (int number : numbers) {
            sum += number;
        }
        return sum;
    }
  }