Java programming This question need to create additional classes as required to solve the problem.

 * This class represents a library of films. * Each film has a unique name, a year of production, a single director, * and one or more actors. * Each person (actor or director) is uniquely identified by their name, and a * person may be either an actor, or a director, or both, for one or more films. */ public class Q3Hollywood { This is what I have done for this question: 

class Film{ String filmName; int year; String director; Set actors; Set linkto; Set linkfrom; Film (String filmName, int year, String director, Set actors){ this.filmName=filmName; this.year=year; this.director=director; this.actors=actors; this.linkto =new HashSet<>(); this.linkfrom=new HashSet<>(); } } Map films=new HashMap<>();

 /** * Add a new film to this library. If the given film name exists, do not * modify this library. * * @param filmName the name of the film * @param year the year that the film was produced * @param director the name of the director of the film * @param actors the names of the actors of the film * @return true if the film was added to this library, or false if the * film was not added (because a film with the given name already exists) */ public boolean addFilm(String filmName, int year, String director, Set actors) { // FIXME complete this method return false; } /** * Remove the film with the given name from the library. * If no film with the given name exists, do not modify this library. * * @param filmName the name of the film to be removed * @return true if the removal was successful, otherwise false */ public boolean deleteFilm(String filmName) { // FIXME complete this method return false; } /** * @return the total number of films in this library */ public int getFilmCount() { // FIXME complete this method return -1; } /** * Get the names of all films that were directed by a particular person. * If the given person has not directed any film, return an empty set. * * @param directorName the name of a director * @return the names of all films for which the given person was director */ public Set getFilmsDirectedBy(String directorName) { // FIXME complete this method return null; } /** * Get the names of all films in which the given person has been either * an actor or a director. * If the given person has not acted or directed in any film, return an * empty set. * * @param personName the name of a person * @return the names of all films for which the given person was either * an actor or a director */ public Set getFilms(String personName) { // FIXME complete this method return null; } /** * Gets the total number of unique actors across all films in this library. * Each actor is only counted once, even if they have acted in multiple * films. Directors are not included in this count unless they have also * been actors. * For example, if there are four films in the library: * "Malcolm X", 1992, director: "Spike Lee", actors: "Denzel Washington", "Angela Bassett", "Spike Lee" * "Boyz n da Hood", 1991, director: "John Singleton", actors: "Ice Cube", "Cuba Gooding, Jr.", "Angela Bassett", "Laurence Fishburne" * "Higher Learning", 1995, director: "John Singleton", actors: "Jennifer Connolly", "Ice Cube", "Laurence Fishburne" * "Waiting to Exhale", 1995, director: "Forest Whitaker", actors: "Whitney Houston", "Angela Bassett" * then getNumActors() == 8. * * @return the number of unique actors across all films */ public int getNumActors() { // FIXME complete this method return -1; } /** * Checks whether two people are both actors in the same film. * * @return true if person1 and person2 have both been actors in the same film */ public boolean areCoStars(String person1, String person2) { // FIXME complete this method return false; } /** * @return the first year in which the given person was either * an actor or director in any film, or -1 if they were not an actor * or director for any film */ public int getFirstFilmYear(String personName) { // FIXME complete this method return -1; } /** * Gets the greatest number of films that any person has been either an * actor or director in. * If a person is both an actor and director in the same film, that film * only counts once. *

* For example, if there are four films in the library: * "Malcolm X", 1992, director: "Spike Lee", actors: "Denzel Washington", "Angela Bassett", "Spike Lee" * "Boyz n da Hood", 1991, director: "John Singleton", actors: "Ice Cube", "Cuba Gooding, Jr.", "Angela Bassett", "Laurence Fishburne" * "Higher Learning", 1995, director: "John Singleton", actors: "Jennifer Connolly", "Ice Cube", "Laurence Fishburne" * "Waiting to Exhale", 1995, director: "Forest Whitaker", actors: "Whitney Houston", "Angela Bassett" * then getMaxFilms() == 3 (for the actor Angela Bassett) * * @return the maximum number of films for any person */ public int getMaxFilms() { // FIXME complete this method return -1; } /** * Gets the maximum number of unique co-stars of any actor. * Two actors are co-stars if they are both actors in the same film. * Only unique co-stars are counted i.e. if two actors appear together * in multiple films, this only adds one towards the total number * of co-stars. *

* For example, if there are three films in the library: * "Malcolm X", 1992, director: "Spike Lee", actors: "Denzel Washington", "Angela Bassett", "Spike Lee" * "Boyz n da Hood", 1991, director: "John Singleton", actors: "Ice Cube", "Cuba Gooding, Jr.", "Angela Bassett", "Laurence Fishburne" * "Higher Learning", 1995, director: "John Singleton", actors: "Jennifer Connolly", "Ice Cube", "Laurence Fishburne" * then getMaxCoStars() == 5 for the actor Angela Bassett. Note that * although Ice Cube and Laurence Fishburne are co-stars in two films, * this only counts once for both and so they only have four co-stars each. * * @return the maximum number of co-stars for any actor */ public int getMaxCoStars() { // FIXME complete this method return -1; } }