请说出E类中【代码1】和【代码2】的输出结果。
classA{
double f(double x,double y){
return x+y;
}
}
class B extends A{
double f(int x,int y){
return x*y;
}
}
public class E{
public static void main (String args[]){
B b = new B();
System.out.println(b.f(3,5)); //【代码1】
System.out.println(b.f(3.0,5.0)); //【代码2】
}
} 
