sequence execution of initilization block,static block,constructor

[Satyajeet Kadam]

Please correct me if i am wrong?

<code>

class One {
    
    /** Creates a new instance of Test */
    {
      System.out.println("3");
    }
    
    {
      System.out.println("4");
    }
    
    
    static
    {
      System.out.println("one");
    }
    
    static
    {
      System.out.println("two");
    
    }
    
    One()
    {
        System.out.println("5   constructor");
    }
}
 
class Test  extends One{
    
    
    {
       System.out.println("o1");
    }
    
    
    {
       System.out.println("o2");
    }
    
    
    static{System.out.println("fuu");}
    Test()
    {
       System.out.println("Test sub class constrcutor ");
    
    }
    
    public static void main(String a[])
    {
       new Test();
    
    }
  
}
 

</code>



<output>
compile-single:
run-single:
one
two
fuu
3
4
5 constructor
o1
o2
Test sub class constrcutor
BUILD SUCCESSFUL (total time: 0 seconds)

</output>


It seems that
1) static blocks gets executed first in order they are declared in superclass then sublass.
2) initlization blocks of superclass followed by superclass constructor.
3)initilization blocks of subclass followed by supclass constructor


Please let me know this is a correct seq or something is remaining?

Any trick to remmber this for exam?



[BSouther: Added UBB CODE tags]
[ January 27, 2008: Message edited by: Ben Souther ]

[Ian Edwards]

Yes that appears to be correct.

What you need to remember is that before an object can be created the classes first need to be loaded by the class loader. This is when the static initialisers are executed. Once they are completed the non-static initialisers and constructors can be executed. For each class in the hierarchy execute the non-static initialisation block then its constructor.