This week's book giveaway is in the OCAJP forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide 1Z0-808 and have Jeanne Boyarsky & Scott Selikoff on-line! See this thread for details.
public static void main(String args) is a method like any other. Any method in any class can reference it via YourClassName.main(), passing either a String or null, depending on what's in main. If you want to know about exception handling, there are lots of posts to this forum, and other sources of information, that explain the syntax options when calling a method that is declared to throw exceptions.