package practice; class Vehicle{ Vehicle() { //父类构造方法 构造器 System.out.println("父类无参构造器"); } static { System.out.println("父类静态块初始化"); } { System.out.println("父类普通初始化块"); } } class Test5 extends Vehicle{ Test5() {//子类构造方法构造器 System.out.println("子类无参构造器"); } int speed; Test5(int speed){//子类有参构造方法 this.speed=speed; System.out.println(speed); } static{ System.out.println("子类静态块初始化"); } //普通的初始化块 { System.out.println("子类普通初始化块"); } public static void main(String[] args) { Vehicle b1=new Vehicle();// Vehicle is created System.out.println("-------------------"); Test5 b=new Test5(128);//Vehicle is created instance initializer block invoked 128 System.out.println("-----------------"); Test5 b2=new Test5(256);//Vehicle is created instance initializer block invoked 256 } }
答案
父类静态块初始化 子类静态块初始化 父类普通初始化块 父类无参构造器 ------------------- 父类普通初始化块 父类无参构造器 子类普通初始化块 128 ----------------- 父类普通初始化块 父类无参构造器 子类普通初始化块 256