Chapter 10.3, Problem 11SC

Explanation of Solution

To sort an array of “Country” objects:

• To sort an array of objects of “Country” class, let the “Country” class that implements the “Comparable” interface as follows,

//Create a class that implements Comparable interface

public class Country implements Comparable

{

    //Code

    //Define the method compareTo()

    public int compareTo(Object otherObject)

    {

        //Cast object reference

        Country otherob = (Country) otherObject;

        //Check the condition

        if (area < otherob...