Chapter 18.3, Problem 18.28CP

Explanation of Solution

Comparator:

• Comparator is an object that is used to compare two other objects and find whether one is less than or greater than or equal to another.
• It is mainly used to order the objects of a user-defined class...

Explanation of Solution

“Comparator” interface:

• Comparator implements the “Comparator” interface that is in “java.util” package.
• The “Comparator” interface consists of two abstract methods. They are:

//Comparator interface

public interface Comparator <T>

{

    //abstract methods

  public int compare (T o1, T o2)

  public boolean equals (Object o)

   �...