Can we execute a program without main() method?

Can we execute a program without main() method?

Ans- Yes, one of the way is static block but in previous version of JDK not in JDK 1.7.

1. class A3{  
2.   static{  
3.   System.out.println("static block is invoked");  
4.   System.exit(0);  
5.   }  
6. }  

Output: static block is invoked (if not JDK7)

In JDK7 and above, output will be:

Output: Error: Main method not found in class A3; please define the main method as:

public static void main(String[] args)