继承(构造方法的执行)

public class Demo4 {
    static{
        System.out.println("Demo4静态代码块执行了");
    }
    {
        System.out.println("Demo4构造代码块执行了");
    }
    public Demo4(){
        System.out.println("Demo4构造方法执行了");
    }
    public static void main(String[] rgs){
        new Demo5();
        new Demo4();
}
}

public class Demo5 extends Demo4 {
    String name = "王五";
    static{
        System.out.println("Demo5静态代码块执行了");
        Demo5 ps = new Demo5();
        System.out.println(ps.name);
        
    }
    {
        System.out.println("Demo5构造代码块执行了");
    }
    public Demo5(){
        System.out.println("Demo5构造方法执行了");
    }
}