static和构造函数初始化顺序

abstract class demo{

    public demo() {}

    protected void a() {

        System.out.println("I am parents!");

    }

}

class demoChild extends demo{

    public demoChild() {

        System.out.println("Begin from here");

        a();

        String a  ="hellp";

    }

    static {

        //static初始化优先于构造函数

        System.out.println("Begin/....");

    }

}

public class Elvis {

    private static final Elvis INSTANCE = new Elvis();

    private Elvis() {}

    public static Elvis getInstance() {

        new demoChild();

        return INSTANCE;

    }

    public static void main(String[] args) {

        (new Elvis()).getInstance();

    }

}

结果为：

可以看书static标记的位置初始化时优先于构造函数。