copytextprices.java

《A first book of java》by Gary J.Bronson 北大出版社

import java.io.*;
public class CopyTextPrices
{
  static final int EOF = -1;
  public static void main(String[] args)
    throws java.io.IOException
  {
    FileReader fr = new 
        FileReader("prices.txt");
    FileWriter fw = new 
        FileWriter("copyprices.txt");

    int c;

    while ((c = fr.read()) != EOF)
      fw.write(c);

    fr.close();
    fw.close();
  }
}