Answer:
The class definition with the instance variable and all the required methods is given below:
<em>public class Distance{</em>
<em> double miles;</em>
<em> public Distance (double startMiles) {</em>
<em> this.miles = startMiles;</em>
<em> }</em>
<em> public double toKilometers ( ){</em>
<em> double kilometerValue = miles/0.62137;</em>
<em> return kilometerValue;</em>
<em> }</em>
<em> public double toYards(){</em>
<em> double yardsValue = miles*1760;</em>
<em> return yardsValue;</em>
<em> }</em>
<em> public double toFeet(){</em>
<em> double feetsValue = miles*5280;</em>
<em> return feetsValue;</em>
<em> }</em>
<em> public double getMiles(){</em>
<em> return miles;</em>
<em> }</em>
<em>}</em>
The main method to test the class is given in the explanation section
Explanation:
<em>public class Main {</em>
<em> public static void main(String[] args) {</em>
<em> Distance karelToSchool = new Distance(5.0);</em>
<em> Distance karelToPark = new Distance(10.0);</em>
<em> Distance karelToFriend = new Distance (12.0);</em>
<em />
<em> double karel_Yards_From_School = karelToSchool.toYards();</em>
<em> System.out.println("Karel's Yards from School is "+karel_Yards_From_School);</em>
<em />
<em> double karel_kilometers_from_park = karelToPark.toKilometers();</em>
<em> System.out.println("Karel's Kilometers from Park is "+karel_kilometers_from_park);</em>
<em />
<em> double karel_feets_from_friend = karelToFriend.toFeet();</em>
<em> System.out.println("Karel's Feets from Friend is "+karel_feets_from_friend);</em>
<em> }</em>
<em />
<em>}</em>