Sequence of constructors and free Blocks

Package com. spoto. test;
 

Public class test1 {
 

Private Static string S1 = "parent static variable ";
 

Private string S2 = "parent variable ";
 

Public test1 (){
 
System. Out. println ("parent class constructor ");
 
}
 
/**
 
* Static code block
 
*/
 

Static {
 
System. Out. println ("parent static block ");
 

}
 
/**
 
* Free block
 
*/
 
{
 
System. Out. println (S2 );
 
System. Out. println (S1 );
 
System. Out. println ("parent class free block ");
 

}
 

Public static void main (string [] ARGs ){
 
New testchild ();
 
}
 

}
 

Class testchild extends test1 {
 

Private Static string S1 = "subclass static variables ";
 

Private string S2 = "subclass variable ";
 
/**
 
* Static code block
 
*/
 

Static {
 
System. Out. println ("subclass static block ");
 

}
 
/**
 
* Free block
 
*/
 
{
 
System. Out. println (S2 );
 
System. Out. println (S1 );
 
System. Out. println ("subclass free block ");
 

}
 

Public testchild (){
 
System. Out. println ("sub-class constructor ");
 
}
 

}

Running result:

Parent static Block
Subclass static Block
Parent variable
Parent static variable
Parent free block
Parent class Constructor
Subclass variable
Static subclass Variables
Subclass free block
Constructor of subclass

Reference: http://java.bootcamp.cn/forum.php? MoD = viewthread & tid = 1976.