... bike02, bike 03; bike01 = new Bicycle(20, 10, 1); bike02 = new MountainBike(20, 10, 5, "Dual"); bike 03 = new RoadBike(40, 20, 8, 23) ; bike01.printDescription(); bike02.printDescription(); bike 03. printDescription(); ... nhi u giao di n khác public interface GroupedInterface extends Interface1, Interface2, Interface3 { double E = 2.718282; void doSomething (int i, double x); int doSomethingElse(String s); } Lê ... (subclass, child class) ho c l p d n xu t (derived class) ho c l p m r ng (extended class) •Trong java, t t c l p ñ u ñư c d n xu t t Object Quan h k th a t o thành hay c u trúc phân c p Lê ðình...