Question

Note: According to the question, please write source code in java only using the class method. Sample Run (output) should be the same as displayed in the question below. Make sure the source code is working properly and no errors.​

Exercise #2: Design and implement class Radio to represent a radio object. The class defines the following attributes (variables) and methods Assume that the station and volume settings range from 1 to 10 1. A private variable of type int named station to represent a station number. Set to 1 2. A private variable of type int named volume to represent the volume setting. Set to1 3. A private variable of type boolean named on to represent the radio on or off. Set to false 4. A non-argument constructor method to create a default radio 5. Method getStation0 that returns the station. 6. Method getVolumeO that returns the volume 7. Method turnonO that turns the radio on. 8. Method turnOff) that turns the radio off. 9. Method stationUp0 that increments the station by 1 only when the radio is on. 10. Method stationDownO that decrements the station by 1 only when the radio is on. 11. Method ỵolumeWpO that increment the volume by 1 only when the radio is on. 12. Method ỵolumeDoyo() that decrements the volume by 1 only when the radio is on. 13. Method toString()to printout a meaningful description of the radio as follows(if the radio is on) The radio station is X and the volume level is Y Where X and Y are the values of variables station and volume If the radio is off, the message is: The radio is off. Now design and implement a test program to create a default radio object and test all class methods on the object in random order. Print the object after each method call and use meaningful label for each method call as shown in the following sample rurn. Sample run Turn radio on: The radio station is 1 and the volume level is 1.| Turn volume up by 3 The radio station is 1 and the volume level is 4 Move station up by 5 The radio station is 6 and the volume level is 4 Turn volume down by 1 The radio station is 6 and the volume level is 3 Move station up by 3 The radio station is 9 and the volume level is 3 Turn radio off. The radio is off. Turn volume up by 2 The radio is off. Turn station down by 2 The radio is off.

Answer 1

Here is the completed code for this problem. Comments are included, go through it, learn how things work and let me know if you have any doubts or if you need anything to change. If you are satisfied with the solution, please rate the answer. Thanks.

// Radio.java

public class Radio {

      // attributes

      private int station;

      private int volume;

      private boolean on;

      // default constructor

      public Radio() {

            // setting default values

            station = 1;

            volume = 1;

            on = false;

      }

      // getter methods for station and volume

      public int getStation() {

            return station;

      }

      public int getVolume() {

            return volume;

      }

      // method to turn radio on

      public void turnOn() {

            on = true;

      }

      // method to turn radio off

      public void turnOff() {

            on = false;

      }

      // method to turn station up

      public void stationUp() {

            // incrementing station if not crosses the boundary

            if (station < 10) {

                  station++;

            }

      }

      // method to turn station down

      public void stationDown() {

            // decrementing station if not crosses the boundary

            if (station > 1) {

                  station--;

            }

      }

      // method to turn volume up

      public void volumeUp() {

            // incrementing volume if not crosses the boundary

            if (volume < 10) {

                  volume++;

            }

      }

      // method to turn volume down

      public void volumeDown() {

            // decrementing volume if not crosses the boundary

            if (volume > 1) {

                  volume--;

            }

      }

      @Override

      public String toString() {

            // returning proper string based on the value of 'on'

            if (on) {

                  return "The radio station is " + station

                             + " and the volume level is " + volume + ".";

            } else {

                  return "The radio is off";

            }

      }

      public static void main(String[] args) {

            /**

            * Creating a Radio object, testing all methods, displaying output

            * exactly like the sample

            */

            Radio radio = new Radio();

            System.out.println("Turn radio on:");

            radio.turnOn();

            System.out.println(radio);

            System.out.println("Turn volume up by 3:");

            radio.volumeUp();

            radio.volumeUp();

            radio.volumeUp();

            System.out.println(radio);

            System.out.println("Move station up by 5:");

            radio.stationUp();

            radio.stationUp();

            radio.stationUp();

            radio.stationUp();

            radio.stationUp();

            System.out.println(radio);

            System.out.println("Turn volume down by 1:");

            radio.volumeDown();

            System.out.println(radio);

            System.out.println("Move station up by 3");

            radio.stationUp();

            radio.stationUp();

            radio.stationUp();

            System.out.println(radio);

            System.out.println("Turn radio off.");

            radio.turnOff();

            System.out.println(radio);

            System.out.println("Turn volume up by 2:");

            radio.volumeUp();

            radio.volumeUp();

            System.out.println(radio);

            System.out.println("Turn station down by 2:");

            radio.stationDown();

            radio.stationDown();

            System.out.println(radio);

      }

}

/*OUTPUT*/

Turn radio on:

The radio station is 1 and the volume level is 1.

Turn volume up by 3:

The radio station is 1 and the volume level is 4.

Move station up by 5:

The radio station is 6 and the volume level is 4.

Turn volume down by 1:

The radio station is 6 and the volume level is 3.

Move station up by 3

The radio station is 9 and the volume level is 3.

Turn radio off.

The radio is off

Turn volume up by 2:

The radio is off

Turn station down by 2:

The radio is off