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An email collection program

, 11 Aug 2001
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This is a small program that can extract email addresses from files that are not necessarily text files.
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This is a small program that can extract email addresses from files that are not necessarily text files.

The program works by opening the input file as a binary file. If an '@' sign is found in the file, the program "backs up" in the file to find the first character that could not be a valid email character.

Then, the email address is collected and stored in an array which is placed in memory. This process continues until the end of file is reached.

When the entire input file is read, the addresses are sorted in alphabetical order, and duplicate addresses are removed. Email addresses that are found in the file are shown in an edit box.

Additionally, a text file containing the same list is created (called emails.txt) in the root directory.

All enhancements and modifications are left to the creativity and imagination of the progrmamer.

Note: This program demonstrates the use of a very efficient sort algorithm. Also, this program shows beginning programmers how to allocate and free memory. Other items of potential interest show file positioning and removal of duplicate entries.


12 Aug 2001 - I incorporated a suggestion from a codeproject member, fixed a few bugs, and then made many improvements to the program. The program now can collect up to 250,000 email addresses per file.


This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

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About the Author

Scott Wenger

United States United States
Scott Wenger

Comments and Discussions

GeneralMy vote of 5 Pinmemberxuplus18-Nov-10 23:26 
Questionhow to detect what files attached in the mail? Pinmembervanta6-Feb-03 23:31 
GeneralJBuilder 6 and reading Excel file Pinmemberfsy21-Sep-02 1:18 
I just want to learn how I can read from .csv file and store the information into an object in JBuilder 6.
When I added " import jxl.*; " package it showed me a message which says that " can not access directory .jxl " .
Please someone give me some hint to read data from the excel (.csv) file and store the information into the object. The lecturer said that the (row,column) can be obtained with the "comma" delimeter. I can't understand , cuase it is a normal excel file , where is the comman ??
Cry | :((

Thanks in advance

Generalloop unrolling Pinmembercarel16-Jul-01 7:12 
GeneralBad link Pinmemberxlam15-Jul-01 18:47 
GeneralRe: Bad link PinmemberChris Maunder15-Jul-01 19:41 

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