怎么让文本中的信息显示在DOS下啊

import java.io.*;
public class read
{
public static void main(String args[])
{ String s;
try {
FileReader in = new FileReader("come.txt");//和read.java在同一目录下
BufferedReader du = new BufferedReader(in);
while((s = du.readLine())!=null)
{
System.out.println(s);
}
}
catch(IOException e){}

}

}