Java(三)

 1 import java.util.Scanner;
 2 
 3 public class sum {
 4 
 5     @SuppressWarnings("resource")
 6     public static void main(String[] args) {
 7         // TODO Auto-generated method stub
 8         System.out.println("你想输入几个数字：");
 9         int nextValue;
10         Scanner kblnput = new Scanner(System.in);
11         nextValue = kblnput.nextInt();
12         int num[] = new int[nextValue];
13         int sum = 0;
14         System.out.print("输入的数字为：");
15         for (int i = 0; i < num.length; i++) {
16             num[i] = kblnput.nextInt();
17             sum += num[i];   }
18         System.out.println("它们的和是：" + sum);
19     }
20 
21 }

 1 import java.util.Scanner;
 2 
 3 
 4 public class test_scanner {
 5 
 6     /**
 7      * @param args
 8      */
 9     public static void main(String[] args) {
10         
11         int nextValue,sum = 0;
12         Scanner kbInput = new Scanner(System.in);     //创建Scanner类
13         kbInput.useDelimiter("\\s");                  //设置分隔符
14         while (kbInput.hasNextInt()) {                //使用hasNextInt()方法判断是否还有整数
15             nextValue = kbInput.nextInt();            //读取数据流中的下一个整数
16             sum += nextValue;    
17         }
18         kbInput.close();                              //关闭流对象
19         System.out.println("Sum:" + sum);
20     }
21 
22 }