执行下列代码后，输出的结果为( )。 class Base {int x = 30;void setX( ) {x=1O;} } class SubClass extends Base {int x=40;void setX ( ) {x=20;}int getX( ) {return super. x; } } public class Test {public static void main(String[ ] args) { SubClass sub=new SubClass( ); sub. setX( ); System. out. println(sub, getX( ) ); } }
A．10
B．20
C．30
D．40
