partcodesmany.java

Java经典例程 从外国一大学计算机教授出版物下载的代码 经典

import java.io.*;
import javagently.*;

class PartCodesMany {

  /* The new Part Codes program   by J M Bishop 1990
   * --------------------------   Java 1.1 July 1999
   *                              updated May 2000
   *
   * Assigns numbers to parts read from a file.
   * Can handle any number of parts.
   * Illustrates handling an EOF Exception.
   */

 PartCodesMany () throws IOException {

    Stream in  = new Stream (System.in);
    Stream fin = new Stream ("parts.dat",Stream.READ);
    Stream fout= new Stream ("parts.out",Stream.WRITE);

    int number = 0;
    String part;
    System.out.println(
           "****** Parts from parts.dat file ******");
    System.out.print("Part starting number? ");
    number = in.readInt();
    System.out.print("Writing to file parts.out");

    try {
      for (int i = number; ; i++) {
        part = fin.readLine();
        fout.println(i+"  "+part);
        System.out.print(".");
      }
    }
    catch (EOFException e) {
      System.out.println("\nData complete");
    }
    fout.close();
  }

   public static void main(String args []) throws IOException {
     new PartCodesMany ();
   }
}