Chapter 5 : Control Structures 2 : Repetition

 1 import java.util.*;
 2 import java.io.*;
 3
 4 public class Loop {
 5
 6     static Scanner console = new Scanner(System.in);
 7
 8     public static void main(String[] args) {
 9
10         int i = 0;
11         int sum = 0;
12
13         while ( console.hasNext() ) {
14             i = console.nextInt();
15             System.out.println(i);
16             sum = sum + i;
17
18         }
19
20         System.out.println("sum = " + sum);
21
22     }
23
24 }

这个代码，本来实验while和console.hasNext()，不知错在哪里