partcodes.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 PartCodes {

  /* The Part Codes program   by J M Bishop 1990
   * ----------------------   Java 1.1 July 1999
   *                          updated May 2000
   *                          for Stream class
   *
   * Assigns numbers to parts read from a file.
   * Illustrates file input and output.
   */

 PartCodes () 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");

    for (int i = number; i < number+5; i++) {
        part = fin.readLine();
        fout.println(i+"  "+part);
        System.out.print(".");
    }
    System.out.println();
    fout.close();
  }

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

}