As I understand. You don’t call any Derived
properties (myVar
belongs to Base
, not to Derived
). And java is not running static block from Derived
. If you add some static field to Derived
and access it, then java executes all static blocks.
class Base {
static public int myVar;
}
class Derived extends Base {
static public int myVar2;
static
{
Base.myVar = 10;
}
}
public class Main {
public static void main( String[] args ) throws Exception {
System.out.println(Derived.myVar2);
System.out.println(Base.myVar);
}
}
From java specification, when class is initialized (and static block got executed):
12.4.1 When Initialization Occurs A class or interface type T will be initialized immediately before the first occurrence of any one of the following:
• T is a class and an instance of T is created.
• T is a class and a static method declared by T is invoked.
• A static field declared by T is assigned.
• A static field declared by T is used and the field is not a constant variable (§4.12.4).
• T is a top level class (§7.6), and an assert statement (§14.10) lexically nested within T (§8.1.3) is executed.