/* 隨機流 */
import java.io.*;
class  Example8_4
{
	public static void main(String[] args) 
	{
		try{
		RandomAccessFile f=new RandomAccessFile("a.txt","rw");
		f.writeBytes("Zhang si ming");
		f.close();
		}
		catch(IOException e){
		System.out.println(e);
		}
	}
}