java——输入流FileInputStream

package com.liaojianya.chapter5;

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

/**
 * This program demonstrates Scanner class
 * @author LIAO JIANYA
 *
 */
public class ScannerTest2
{
	public static void main(String[] args) throws FileNotFoundException
	{
//		File file = new File("F:\\", "HelloWorld.txt");
//		FileInputStream in = new FileInputStream(file);
		FileInputStream in = new FileInputStream("F:\\HelloWorld.txt");
		Scanner s = new Scanner(in);
		while(s.hasNextLine())
		{
			System.out.println(s.nextLine());
		}
		s.close();
	}
	

}

在F盘写一个简单的txt文件如下　　

结果显示：
public class HelloWorld
{
    public static void main(String[] args)
    {
	System.out.println("Hello world!");
    }

}