String... to 可变参数的使用

public class testMail {

    public static void fun(int... x) {
          for(int i = 0;i < x.length;i++) {  
              System.out.print(x[i] + ",");  
              } 
          } 
        public static void main(String args[]) throws Exception{ 
            fun(5);  System.out.println("");  
            fun(5,6);  System.out.println("");
            fun(5,6,7); 
            }
}

输出：
5,

5,6,

5,6,7,