datastream2.java

这是清华大学编写的JAVA教材中所有题目的源代码！

import java.io.*;

class DataStream2
{
	public static void main(String args[])
	{
		File f=new File("hello.txt");
		try
		{
			FileOutputStream fos = new FileOutputStream(f);
			BufferedOutputStream bos=new BufferedOutputStream(fos);
			DataOutputStream dos=new DataOutputStream(bos);
			
			//dos.writeUTF("ab中国");
			//dos.writeBytes("ab中国");
			dos.writeChars("ab中国");
			dos.close();
			
			FileInputStream fis = new FileInputStream(f);
			BufferedInputStream bis=new BufferedInputStream(fis);
			DataInputStream dis=new DataInputStream(bis);
						
			//System.out.println(dis.readUTF());			
			
			byte[] buf=new byte[1024];
			int len=dis.read(buf);
			System.out.println(len);			
			System.out.println(new String(buf,0,len));			
			
			dis.close();
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}
	}
}