JDK 1.5 新特性——Scanner

 

 1 package bin.ykb;
 2 
 3 import java.io.File;
 4 import java.io.FileNotFoundException;
 5 import java.util.Scanner;
 6 
 7 public class Demo1 {
 8 
 9     /**
10      * 具体看JDK文档
11      * 
12      * @author yokoboy
13      * @throws FileNotFoundException
14      */
15     public static void readFile() throws FileNotFoundException {
16         Scanner scanner = new Scanner(new File("C:\\1.txt"));
17         while (scanner.hasNext()) {
18             System.out.println(scanner.next());
19         }
20     }
21 
22     // 读取控制台输入
23     public static void readIn() {
24         Scanner scanner = new Scanner(System.in);
25         while (scanner.hasNext()) {
26             String s = scanner.nextLine();
27             if (s.equals("#")) {
28                 break;
29             }
30             System.out.println(s);
31         }
32     }
33 
34     public static void readString() {
35         Scanner scanner = new Scanner("11g3").useDelimiter("g");// 跳过g
36         System.out.println(scanner.nextInt());
37         System.out.println(scanner.nextInt());
38     }
39 
40     public static void demo1() {
41         String input = "1fish 2 fish red fish blue fish";
42         Scanner s = new Scanner(input).useDelimiter("\\s*fish\\s*");// 跳过fish,无论fish前后有没有空格
43         System.out.println(s.nextInt());
44         System.out.println(s.nextInt());
45         System.out.println(s.next());
46         System.out.println(s.next());
47         s.close();
48     }
49 
50     public static void main(String[] args) throws FileNotFoundException {
51         readFile();// 读取文件
52         readIn();// 读取控制台输入
53         readString();//读取字符串
54         demo1();//API文档中的例子
55 
56     }
57 }

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http://www.cnblogs.com/yokoboy/archive/2012/07/25/2608427.html

posted @ 2012-07-25 15:41  yokoboy  阅读(457)  评论(0)  编辑  收藏  举报
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