misc
Class LineReader

java.lang.Object
  misc.LineReader

public class LineReader

extends java.lang.Object

Small class demostrating the use of the java.io.LineNumberReader class and it's usefulness in searching text files.
TODO At some point consider the following enhancements

• Implementing search strings that contain spaces - from the command line. Do this by using double quotes around each end of the string and combining each arg into one until a second delimiting last double quote is found. For example "This is a search string" goes from an String args[5] to String arg.
• Implement command line flag for Match Case
• Implement command line flag for Match Whole Words
• Implement regex searching
• Change the class structure so that it's not dependent upon files - only LineNumberReader objects.
• Implement a user class that that takes a directory name and creates the file list automatically

Nested Class Summary

class

LineReader.RetList Use a public inner class as the return for the searching.

Field Summary

private static boolean	bCommandLine true when called the class is used via a command line
(package private) java.util.List	fileList A list of files to process
(package private) java.lang.String	strSearchText The text to search for in the file

Constructor Summary

LineReader(java.lang.String[] args)
Constructor that processes the command line arguments
The minimum number of args is 2.

Method Summary

static void	main(java.lang.String[] args) Main function - runs the show
private java.util.List	search(java.lang.String fileName, java.io.LineNumberReader lnr) Get hold of each line and search it for the first instance of the search string
java.util.List	searchFiles() Search the file list a line at a time for the search string
private void	usage() Display the usage details for this class - if called from the command line

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

bCommandLine

private static boolean bCommandLine

true when called the class is used via a command line

strSearchText

java.lang.String strSearchText

The text to search for in the file

fileList

java.util.List fileList

A list of files to process

Constructor Detail

LineReader

public LineReader(java.lang.String[] args)

Constructor that processes the command line arguments
The minimum number of args is 2. args[0] = search string and args[1] = file to search

Method Detail

main

public static void main(java.lang.String[] args)

Main function - runs the show

searchFiles

public java.util.List searchFiles()

Search the file list a line at a time for the search string

search

private java.util.List search(java.lang.String fileName,
                              java.io.LineNumberReader lnr)
                       throws java.io.IOException

Get hold of each line and search it for the first instance of the search string

Throws:

java.io.IOException

usage

private void usage()

Display the usage details for this class - if called from the command line