import java.util.ArrayList;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
/*
*
* This class contains a map of string keys, representing professors, to an array list of strings.
* Each string in the array list represents a grad. student of a specific professor
*
* For example, if students "Ali", "Mohamed", "Hamna" all have "Dr. Smart" as their professor, then the map
* would map the key "Dr. Smart" to an array list where element 0 in the list is "Ali", element 1 is "Mohamed" and
* element 2 is "Hamna".
*
* In other words, with this map we can keep track of the distribution of grad. students as well as the individual students
* who are supervised by a specific professor
*/
public class ProfessorMap
{
//-----------Start below here. To do: approximate lines of code = 1
// Declare a tree map called professors that maps a String representing a professor name
// to an ArrayList of Strings.

//-----------------End here. Please do not remove this comment. Reminder: no changes outside the todo regions.

public ProfessorMap()
{
//-----------Start below here. To do: approximate lines of code = 1
// create an empty tree map and assign to professors

//-----------------End here. Please do not remove this comment. Reminder: no changes outside the todo regions.
}

/*
 * Establishes a mapping from the given professor to their list of grad. students
 */
public void add(String professor, String student)
{
//-----------Start below here. To do: approximate lines of code = 9
// map the professor to an array list and add the student to that list
// Hint: if this is the first mapping for the professor, create an empty array list,
// add the student to it then create the mapping from the professor key to the array list in the tree map



//-----------------End here. Please do not remove this comment. Reminder: no changes outside the todo regions.
}

/*
 * Prints the student distribution
 */
public void printStudentsOfProfessor()
{
//-----------Start below here. To do: approximate lines of code = 10
// Prints all the keys and associated lists
// Each line that is printed should print the professor followed by ": " followed by the size of the
// array list for that key, followed by " - " followed by each of the students in the list separated by a ", "
// Ensure the last student in a list has no following ", "



//-----------------End here. Please do not remove this comment. Reminder: no changes outside the todo regions.
}
}

Answer rating: 100% (QA)

import javautilArrayList import javautilMap import javautilSet import javautilTreeMap This class contains a map of string keys representing professors ... View the full answer