The Walmart Java code sample is associated with the Walmart Product Lookup API and Walmart Search Lookup API. This code displays how to create iterating code over special buy and clearance. It also shows how to fetch item price and availability. A third example demonstrates how to search results with keywords.
Startups need to build quickly and iterate quicker. That means not re-inventing the wheel -- whenever possible. Just 5 years ago, people were asking why would you use an API? This has quickly turned to why wouldn't you! Since March 2007 there are 14 times as many APIs listed on the ProgrammableWeb site. And the growth rate is accelerating. API listings on ProgrammableWeb have exploded this year so far, doubling the same period last year, and about four times the same period in 2010 (see chart below).