How to detect WLAN?

How to write a Java program that can detect WLAN? Because I have no idea how to start and where to search for even from google. Maybe anyone can give me some idea like what API or the step then i will definately try out myself first. I am new to network topic so no idea where to search from. 开发者_高级运维

There is no facilities present in the Java Runtime Library to identify WLAN, so you cannot do it without invoking external code in order to do whatever you need to do. This can either be commands or DLL's. The exact procedure varies.