有谁能帮忙，理解一下这段代码的输出，在eclipse下运行有输出，没看懂输出

Question

package StaticTests;

class StaticSuper{
static {
System.out.println("super static block");
}
StaticSuper(){
System.out.println("super constructor");
}
}
public class StaticTests extends StaticSuper {
static int rand;
static{
rand=(int)(Math.random()*6);
System.out.println("static block "+ rand);
}
StaticTests(){
System.out.println("constructor");
}
public static void main(String[] args){
System.out.println("in main");

StaticTests st = new StaticTests();
}
}

Answer 1

 static {
System.out.println("super static block");
}
static{
rand=(int)(Math.random()*6);
System.out.println("static block "+ rand);
}

static是静态的，只要类加载就会执行这部分代码块