Why use static blocks over initializing instance variables directly?

Question

Why would I use a static block:

static {
   B = 10;
}

over:

Integer B = 10;

What is the advantages/disadv

Answer 1

First your Integer B appears to be a non static member variable and can not be accessed from a static block. So you either meant to write

//Initialize static field
static {
   B = 10;
}
static Integer B = 10;

or

//Initialize member field
{
   B = 10;
}
Integer B = 10;

In both cases you can use it to initialize B with a value that could cause an exception or do something more complex without writing a special method for init.

{
   try{
      B = thisWillThrowAFileNotFound();
   }catch(FileNotFoundException){
      B = 10;//Set default
   }

}