Java Forward Reference

According to the book and read the article, leads to a "forward reference" question:

 Public classInstanceinittest {Static {//    {A = 6; System.out.println (a);//cannot reference a field before it is definedSystem.out.println (Fun ()); }    Static intFun () {returnA; }    Static intA = 9;  Public Static voidMain (string[] args) {System.out.println (Newinstanceinittest (). a); }}

Errors in compiling:

There is still no understanding, less information, and a lot of people don't know so much about the specifics of the Java language specification. Wait for the time to review and understand.

Links to forward references:

Http://www.cnblogs.com/nokiaguy/p/3156357.html

Http://www.cnblogs.com/iamzhoug37/p/4306304.html

Java Forward Reference