Once, I implemented a mail client/server in Java long back (around 2002 I think). I found that no mails are being sent. I started putting System.out messages everywhere (No debugging tools back then :(. Used to use notepad to write code). Finally to find out that the sendMail method was never called. Took around 30 minutes to find that that line was commented by me the previous day to do some fast coding+debugging on UI feature. :)

Once, I implemented a mail client/server in Java long back (around 2002 I think). I found that no mails are being sent. I started putting System.out messages everywhere (No debugging tools :(. Used to use notepad to write code). Finally to find out that the sendMail method was never called. Took around 30 minutes to find that that line was commented by me the previous day to do some fast coding+debugging on UI feature. :)