JDK 1.5 新特性——Scanner

package bin.ykb;

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

public class Demo1 {

    /**
     * 具体看JDK文档
     * 
     * @author yokoboy
     * @throws FileNotFoundException
     */
    public static void readFile() throws FileNotFoundException {
        Scanner scanner = new Scanner(new File("C:\\1.txt"));
        while (scanner.hasNext()) {
            System.out.println(scanner.next());
        }
    }

    // 读取控制台输入
    public static void readIn() {
        Scanner scanner = new Scanner(System.in);
        while (scanner.hasNext()) {
            String s = scanner.nextLine();
            if (s.equals("#")) {
                break;
            }
            System.out.println(s);
        }
    }

    public static void readString() {
        Scanner scanner = new Scanner("11g3").useDelimiter("g");// 跳过g
        System.out.println(scanner.nextInt());
        System.out.println(scanner.nextInt());
    }

    public static void demo1() {
        String input = "1fish 2 fish red fish blue fish";
        Scanner s = new Scanner(input).useDelimiter("\\s*fish\\s*");// 跳过fish,无论fish前后有没有空格
        System.out.println(s.nextInt());
        System.out.println(s.nextInt());
        System.out.println(s.next());
        System.out.println(s.next());
        s.close();
    }

    public static void main(String[] args) throws FileNotFoundException {
        readFile();// 读取文件
        readIn();// 读取控制台输入
        readString();//读取字符串
        demo1();//API文档中的例子

    }
}

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