练习题2

Java继承后类的初始化顺序

问题：静态代码块、⾮静态代码、⽗类/子类无参构造⽅方法、父类/子类的⼀一般⽅法

public class Father {
    static {
        System.out.println("父类静态代码块");
    }
    public Father(){
        System.out.println("father 无参构造函数");
    }
    public Father(int age){
        System.out.println("father 有参构造函数");
    }
    public void sleep(){
        System.out.println("father sleep方法");
    }
}
public class Children extends Father{
    static {
        System.out.println("Child静态代码块");
    }
    public Children(){
        //super();
        System.out.println("Child⽆参构造函数");
        super.sleep();
    }
    public void sleep(){
        System.out.println("Child sleep方法");
    }
}
public static void main(String[] args) {
        new Children().sleep();
 }

浏览量：加载中...