FileInputStream和FileOutputStream类的学习
这2个类是分别用来创建磁盘文件的输入流和输出流对象,
创建FileInputSream实例对象时,指定的文件应该是存在并且可读的.
创建FileOutputStream实例对象时,如果指定文件名已经存在,这个文件的内容将被覆盖清除;
下面通过一个例子来熟悉这2个类:

package cn.com;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;public class FileStream {public static void main(String[] args) {FileOutputStream out;try {out = new FileOutputStream("hello.txt");out.write("www.sohu.com".getBytes());out.close();byte[] buf = new byte[1024];File f = new File("hello.txt");FileInputStream in = new FileInputStream(f);int len = in.read(buf);System.out.println(new String(buf, 0, len));} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}