TestRandomAccessFile种写入文件出现乱码

import java.io.*;public class TestRandomAccessFile {  public static void main(String args[]) throws Exception{      RandomAccessFile raf=new RandomAccessFile("C:\\Documents and Settings\\Administrator\\桌面\\raf.txt","rw");      for(int i=0;i<10;i++){          raf.writeLong(i*1000);      }      raf.seek(5*8);      raf.writeLong(13256);      raf.seek(0);      for(int i=0;i<10;i++){          System.out.println(i+"="+raf.readLong());      }      raf.close();  }}