Write a class named Fan to model fans. The properties are speed, on, radius, and

Question

Write a class named Fan to model fans. The properties are speed, on, radius, and color. You need to provide the accessor methods for the properties, and the toString method for returning a string consisting of all the string values of all the properties in this class. Suppose the fan has three fixed speeds. Use constants 1, 2, and 3 to denote slow, medium, and fast speeds.

The outline of the class is given as follows:

public class Fan {

public final int SLOW = 1;

public final int MEDIUM = 2;

public final int FAST = 3;

private int speed = SLOW;

private boolean on = false;

private double radius = 5;

private String color = "white";

public Fan ( ) { }

public Fan (int speed, boolean on, double radius, String color) { }

public int getSpeed ( ) { }

public void setSpeed (int speed) { }

public boolean isOn ( ) { }

public void setOn ( ) { }

public double getRadius ( ) { }

public void setRadius (double radius ) { }

public String getColor ( ) { }

public void setColor ( String color ) { }

public String toString ( ) { }

}

Write a client program (test application) to test the Fan class. In the client program, create a Fan object. Assign maximum speed, radius 10, color yellow, and turn it on. Display the object by invoking its toString method.

You also need to test this program.

Explanation / Answer

FanTest.java

public class FanTest {

  
   public static void main(String[] args) {
       Fan f = new Fan();
       f.setSpeed(100);
       f.setColor("yellow");
       f.setOn();
       f.setRadius(10);
       System.out.println(f.toString());
   }

}

Fan.java

public class Fan {
public final int SLOW = 1;
public final int MEDIUM = 2;
public final int FAST = 3;
private int speed = SLOW;
private boolean on = false;
private double radius = 5;
private String color = "white";
public Fan ( ) { }
public Fan (int speed, boolean on, double radius, String color) {
   this.speed = speed;
   this.on = on;
   this.radius=radius;
   this.color=color;
}
public int getSpeed ( ) {
   return speed;
}
public void setSpeed (int speed) {
   this.speed= speed;
}
public boolean isOn ( ) {
   return on;
}
public void setOn ( ) {
   this.on = true;
}
public double getRadius ( ) {
   return radius;
}
public void setRadius (double radius ) {
   this.radius = radius;
}
public String getColor ( ) {
   return color;
}
public void setColor ( String color ) {
   this.color = color;
}
public String toString ( ) {
   return "Speed: "+speed+" Radius: "+radius+" Color: "+color+" Turn On: "+on;
}
}

Output:

Speed: 100
Radius: 10.0
Color: yellow
Turn On: true

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