lab4/FindString2.java

   1 /*
   2  * FindString2.java
   3  *
   4  * Version:
   5  *     $Id: FindString2.java,v 1.1 2008/04/03 18:45:33 rmh3093 Exp rmh3093 $
   6  *
   7  * Revisions:
   8  *     $Log: FindString2.java,v $
   9  *     Revision 1.1  2008/04/03 18:45:33  rmh3093
  10  *     Initial revision
  11  *
  12  */
  13
  14 import java.io.BufferedReader;
  15 import java.io.FileNotFoundException;
  16 import java.io.FileOutputStream;
  17 import java.io.FileReader;
  18 import java.io.IOException;
  19 import java.io.OutputStream;
  20 import java.io.PrintWriter;
  21
  22 /**
  23  * @author rmh3093
  24  *
  25  */
  26 public class FindString2 {
  27
  28         /**
  29          * Seach for the occurences of string in file
  30          *
  31          * @param args command line arguments
  32          */
  33         public static void main(String[] args) {
  34
  35                 if ((args.length < 2) || (args.length > 3)) {
  36                         System.out.println("Usage: java FindString2 search-string " +
  37                                         "infile-name [ outfile-name ]");
  38                 } else {
  39                         try {
  40                                 FileReader filereader = new FileReader(args[1]);
  41                                 BufferedReader buffer = new BufferedReader(filereader);
  42                                 PrintWriter printwriter = null;
  43                                 if (args.length < 3) {
  44                                         printwriter = new PrintWriter(System.out);
  45                                 } else {
  46                                         printwriter = new PrintWriter(args[2]);
  47                                 }
  48                                 CharSequence sequence = args[0];
  49                                 String s = buffer.readLine();
  50                                 while (s != null) {
  51                                         if (s.contains(sequence)) {
  52                                                 printwriter.println(s);
  53                                         }
  54                                         s = buffer.readLine();
  55                                 }
  56                                 buffer.close();
  57                                 filereader.close();
  58                                 printwriter.close();
  59                         } catch (FileNotFoundException e) {
  60                                 System.err.printf("%s occurred: %s\n",
  61                                                 e.getClass().getSimpleName(),e.getMessage());
  62                         } catch (IOException e) {
  63                                 System.err.printf("%s occurred: %s\n",
  64                                                 e.getClass().getSimpleName(),e.getMessage());
  65                         }
  66                 }
  67
  68         }
  69
  70 }