分析以下程序，其输出结果是什么public class Test{public static void main(String[] args){Flyanimal f=new Flyanimal();}}class Bird{static int wingsNumber=2;static{System.out.println("I am Bird");}public Bird(){System.out.println("Bird constructor");}}class Flyanimal extends Bird{static{System.out.println("I am fly Men");}public Flyanimal(){System.out.println("fly constructor");}}