Hi sona nagee !though I agree with . But give a explaination about the code bellowed which from Axel Janssen (you can find the code of his in gzw0733's "which method will be use?") class vehicle{ public String color = "vehicle-color"; public void drive(){ System.out.println("vehicle:drive"); } public static void brake() { System.out.println("vehicle:brake"); } } class car extends vehicle{ public String color = "car-color"; public void drive(){ System.out.println(" car:drive"); } public static void brake() { System.out.println("car:brake"); } } public class Test12{ public static void main(String args[]){ vehicle v; car c; v=new vehicle(); c=new car(); System.out.println("---- first object ------"); v.drive(); v.brake(); System.out.println(v.color); System.out.println("---- second object ------"); c.drive(); c.brake(); System.out.println(c.color); v=c; System.out.println("---- variable of first object now points to second object, but is of type first object ------"); v.drive(); v.brake(); System.out.println(v.color); } }
first of all i am mrs class vehicle{ public void drive(){ System.out.println("vehicle:drive"); } }
class car extends vehicle{ public void drive(){ System.out.println(" car:drive"); } } public class test10{ public static void main(String args[]){ vehicle v; car c; // methods are picked according to the object type and variables are picked according to the reference type // reference is vehicle type and object is also vehicle type v=new vehicle(); // refernce is car type and object is also car type c=new car(); // drive() of vehicle is pickeup up as the object type is vehicle v.drive(); // vehicle:drive // drive() of car is picked up as the object type is car c.drive(); // car: drive // v is a reference of vehicle type which is now made to refer to an object type of car. remember the object type here is car v=c; // methods of object type are picked up so drive() of car is picked up v.drive(); // car:drive } } hope it is clear now
0
