How to find the distance between two ZipCodes using Java Code?

Question

My requirements are similar to this question, except the fact that I am prohibited to use the latitude and longitude values. I want to caluclate the \"walking\"

Answer 1

I followed a two step process...

1. First, I took the user's zipcode as input, than found the latitude and longitude values by using one of the freely available APIs,
2. Once I got the latitude, longitude pair,I was able to easily use the function suggested by @Bohemian...

However after sometimes I found that google and Yahoo APIs are the best possible way for this IMHO, so I integrated that in my project. If any one interested I can paste the code for that here.