This is a java project.

Details

• Consider you are designing vehicles engine.
• When you are done with the hardware part, you want some of the software functionalities to be implemented by a client who is using your engine. So, in that case, you can define your engine functionalities in an interface.
• Your interface is named Engine and its able to change gear and speed.

void changeGear(int a);

void speedUp(int a);

• Create a class Vehicle implementing the above interface and implements its methods.
• In the main, create vehicle object and set the gear to 3 and speed to 70 and then call this line:

System.out.println(objv);