package aaa_duotai;public class Demo {
        static Demo d1 = new Demo();
        static Demo d2 = new Demo();
        {
            System.out.println("构造代码块");
        }
        static {
            System.out.println("静态构造代码块");
        }
        public Demo() {
            System.out.println("构造方法");
        }
        public static void main(String[] args) {
             Demo d1 = new Demo();        }
}