class Base {
    static int a = 1;

    public Base() {
        System.out.println(" 55555");
    }

    static {
        System.out.println("Static Base");
    }

    static void method() {
        System.out.println("Base");
    }
}

class Sub extends Base {
    public Sub() {
        System.out.println(" 44444");
    }

    static int b = 2;
    static {
        System.out.println("Static Sub");
    }

}

public class Traversc {
    public static void main(String[] args) {
        Sub sub = new Sub();//先执行父类的构造函数，再执行子类的构造函数
        Sub.method();//调用static程序段,先于构造函数执行，且永远只执行一次
        //Sub.method();
        //System.out.println("a=" + Sub.b);
    }
}