FileInputStream跟FileOutputStream类的学习

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 block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

	}
}