Java方法的可变参数

Posted 2020-11-23 fairy-land

 1 class Demo
 2 {
 3     public static int sum(int ... data) {            //此处可以传递一个数组，也可以是多个参数
 4         int sum = 0;
 5         for (int i : data)
 6             sum = sum + i;
 7         return sum;
 8     }
 9 }
10 public class Variable {
11     public static void main(String[] args) {
12         System.out.println(Demo.sum(1,2,3,4,5));
13         System.out.println(Demo.sum(new int [] {1,2,4,5,3,4}));      
14     }
15 }

从JDK1.5开始，为了方便开发者进行可变参数的定义，就提供了此功能，喵~~