下题关于子类和继承中上转型对象及类方法的应用，请输出运行结果（为便于填写，请在不同输出结果之间用1个空格分隔，否则系统评分为0，请注意。如1.0 2 3.2 4）class A{ double f(double x,double y){return x+y; } static int g(int n){ //类方法return n*n; }}class B extends A{ double f(double x,double y){double m=super.f(x,y);return m+x*y; } static int g(int n){int m=A.g(n);return m+n; }}public class T1{ public static void main(String args[]){B b=new B();System.out.println(b.f(3.0,4.0));System.out.println(b.g(4));A a=new B();System.out.println(a.f(3.0,4.0));System.out.println(a.g(5)); }}