initialization sequence

[geeta rai]

Could someone pls enlighten on the sequence of initialization steps when we have initializer blocks(both static and instance), superclass and subclass constructors in consideration.
Thanks.

[Ko Ko Naing]

I hope the following link might help you, which I bookmarked long time ago, when I was on my way to SCJP 1.2....
http://www.artima.com/objectsandjava/webuscript/InitCleanup1.html

[Dirk Schreckmann]

geeta,
When I'm curious about things of this nature, I like to write myself a quick example program to see just what happens.
Concerning your curiousity, the following example
Foo

public class Foo
{
  public static void main(String[] args)
  {
    new MiniBar();
  }
}

MiniBar

public class MiniBar extends Bar
{
  static
  {
    System.out.println("MiniBar's static initializer block");
  }
  
  {
    System.out.println("MiniBar's instance initializer block");
  }
  
  public MiniBar()
  {
    System.out.println("MiniBar's constructor");
  }
}

Bar

public class Bar
{
  static
  {
    System.out.println("Bar's static initializer block");
  }
  
  {
    System.out.println("Bar's instance initializer block");
  }
  
  public Bar()
  {
    System.out.println("Bar's constructor");
  }
}

produces the following output.

Bar's static initializer block
MiniBar's static initializer block
Bar's instance initializer block
Bar's constructor
MiniBar's instance initializer block
MiniBar's constructor