３７は間違えです　すいません

class Super{
int d=10;
void meth(){
System.out.println(d);
}
}
class Sub extends Super{
double d=30.0;

void meth(){
System.out.println(d);
}
}
class InstanceChk {
public static void main(String[] args) {

Super s = new Sub();
System.out.println(s.d);
s.meth();

}
}