java，

java，

/**类的执行顺序是，MAIN所在类的静态块，父类静态块，子类静态块，父类非静态块，父类构造器，子类非静态块，子类构造器。*/

public class OrderTest {

{
System.out.println("testCase");
}
static {
System.out.println("S"+"testCase");
}

public static void main(String[] args)
{
B b = new B();
System.out.println(b.x);
}



}

class A
{
int x = 10;
{
System.out.println("A");
}
static {
System.out.println("SA");
}
public A()
{
System.out.println("Ac");
System.out.println("x:"+x);
x=20;
}
}
class B extends A
{ int x =30;
{
System.out.println("B");
}
static {
System.out.println("SB");
}

public B()
{
System.out.println("Bc");
System.out.println("x:"+x);
x=40;
}
}

结果是
StestCase
SA
SB
A
Ac
x:10
B
Bc
x:30
40