Code:   interface Bicycle{ //interface for bicycle     void changeGear(int val); //abstract methods     void changeSpeed(int inc);     void applyBrakes(int dec);     void ringBell(int count);

Code:

interface Bicycle{ //interface for bicycle

    void changeGear(int val); //abstract methods

    void changeSpeed(int inc);

    void applyBrakes(int dec);

    void ringBell(int count);   

}

class NewCycle implements Bicycle{ //class for a new cycle

    int speed=0; //stores the speed value

    int gear=0; //stores the gear value

    @Override

    public void changeGear(int val) { //method to change the gear

        gear=val;

    }

    @Override

    public void changeSpeed(int inc) { //method to change the speed

        speed=speed+inc;

    }

    @Override

    public void applyBrakes(int dec) { //method to apply brakes

        speed=speed-dec;

    }

    @Override

    public void ringBell(int count) { //method to ring the bell

        for(int i=0;i<count;i++){

            System.out.print("Clang!!"+"  ");

        }

        System.out.println("");

    }

    public void printState(){ //method to print the states

        System.out.println("Ring bell, Speed, Gear, Brake, Ring Bell, Ring Bell");

    }

}

public class BicycleDemo { //application class

    public static void main(String args[]){ //main method

        NewCycle obj=new NewCycle(); //object creation

        obj.ringBell(1); //method call to ring the bell

        obj.changeSpeed(3); //method call for changing the speed

        System.out.println("Speed of bicycle: "+obj.speed);

        obj.changeGear(2); //method call for changing the gear

        System.out.println("Gear of bicycle: "+obj.gear);

        obj.applyBrakes(1); //method call for applying brakes

        System.out.println("Speed of bicycle: "+obj.speed);

        obj.ringBell(2); //method call to ring the bell

        obj.printState(); //method call for printing the states

    }

}

Instructions:

Continue the above code(program):

Also:

• A subclasss of you bicycle class for a mountain bicycle, as described in the section: Classes
• Your  brand comes with a water bottle (both the generic and mountain type). Add a new field that will keep the percentage of water remaining in the bottle (1 full, 0 emptty, 0.5 half empty), as described in the section: Declaring member variables. The water bottle is emptty by default.
• Declare a method to completely fill the water bottle. Declare a method to completely drink the water. No parameters needed. See: Defining methods.
• Declare a method that will specify how much to fill the water bottle, as a percentage. If the bottle has already that quantity, do nothing. The method must have the same name as above. A parameter is needed.
• Declare a method that will specify how much to drink from the water as a percentage. The method must have the same name as above. A parameter is needed. 
• Create a new constructor that will specify the initial cadence, gear and water level. See: Providing Constructors for Your Classes
• Create another class, with a main method, in which you will take a trip aroound your house in your mountain bicycle, changing your bicycle attributes, starting and ending from a complete stop, and ringing the bell twice at start and once at the end. You must start with 3/4 filled water bottle, and dring some water once.
• Your trip must have at least 5 different parts in which you change your bicycle state and print its state (starting and ending from a rest state).