静态块

public class OrderTest {
    public static void main(String[] args) {
        new Child();
    }
}
class Parent {
    static String name = "hello";
    static {
        System.out.println("Parent static");
    }
    public Parent() {
        System.out.println("Parent constructor");
    }
}
class Child extends Parent {
    static String childName = "world";
    static {
        System.out.println("Child static");
    }
    public Child() {
        super();
        System.out.println("Child constructor");
    }
}

结果

Parent static
Child static
Parent constructor
Child constructor