Find Movies where an actor with first and last name has worked using Java 8 Streams, map, filter, reduce
$begingroup$
I am trying to playaround with Java 8 Stream API and wanted to convert the following method using Java 8 stream filter map reduce.
I have a list of Movies and every Movie object has a list of Actors along with other fields.
I want to find all the movies where the actor with a specific first and last name has worked in it.
The method below is Java 7 based where I loop over the list of Movies and then loop over a list of actors for that movie. If an actor with that first and last name is found, I break the inner loop and add that movie to the list of movies which is returned.
My question is how can I re-write this code using Java 8 streams. I can see it is a map, filter, reduce problem but I am not able to come up with a clear solution.
public List<Movie> getMoviesForActor(String firstName, String lastName) {
final List<Movie> allMovies = movieRepository.getAllMovies();
final List<Movie> movies = new ArrayList<>();
for (Movie movie : allMovies) {
boolean actorFound = false;
for (Actor actor : movie.getActors()) {
if(firstName.equalsIgnoreCase(actor.getFirstName()) && lastName.equalsIgnoreCase(actor.getLastName())) {
actorFound = true;
break;
}
}
if(actorFound) {
movies.add(movie);
}
}
return movies;
}
java stream
asked 4 mins ago
KashifKashif
11
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Kashif is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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add a comment |
$begingroup$
I am trying to playaround with Java 8 Stream API and wanted to convert the following method using Java 8 stream filter map reduce.
I have a list of Movies and every Movie object has a list of Actors along with other fields.
I want to find all the movies where the actor with a specific first and last name has worked in it.
The method below is Java 7 based where I loop over the list of Movies and then loop over a list of actors for that movie. If an actor with that first and last name is found, I break the inner loop and add that movie to the list of movies which is returned.
My question is how can I re-write this code using Java 8 streams. I can see it is a map, filter, reduce problem but I am not able to come up with a clear solution.
public List<Movie> getMoviesForActor(String firstName, String lastName) {
final List<Movie> allMovies = movieRepository.getAllMovies();
final List<Movie> movies = new ArrayList<>();
for (Movie movie : allMovies) {
boolean actorFound = false;
for (Actor actor : movie.getActors()) {
if(firstName.equalsIgnoreCase(actor.getFirstName()) && lastName.equalsIgnoreCase(actor.getLastName())) {
actorFound = true;
break;
}
}
if(actorFound) {
movies.add(movie);
}
}
return movies;
}
java stream
asked 4 mins ago
KashifKashif
11
New contributor
Kashif is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
add a comment |
$begingroup$
I am trying to playaround with Java 8 Stream API and wanted to convert the following method using Java 8 stream filter map reduce.
I have a list of Movies and every Movie object has a list of Actors along with other fields.
I want to find all the movies where the actor with a specific first and last name has worked in it.
The method below is Java 7 based where I loop over the list of Movies and then loop over a list of actors for that movie. If an actor with that first and last name is found, I break the inner loop and add that movie to the list of movies which is returned.
My question is how can I re-write this code using Java 8 streams. I can see it is a map, filter, reduce problem but I am not able to come up with a clear solution.
public List<Movie> getMoviesForActor(String firstName, String lastName) {
final List<Movie> allMovies = movieRepository.getAllMovies();
final List<Movie> movies = new ArrayList<>();
for (Movie movie : allMovies) {
boolean actorFound = false;
for (Actor actor : movie.getActors()) {
if(firstName.equalsIgnoreCase(actor.getFirstName()) && lastName.equalsIgnoreCase(actor.getLastName())) {
actorFound = true;
break;
}
}
if(actorFound) {
movies.add(movie);
}
}
return movies;
}
java stream
asked 4 mins ago
KashifKashif
11
New contributor
Kashif is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
I am trying to playaround with Java 8 Stream API and wanted to convert the following method using Java 8 stream filter map reduce.
I have a list of Movies and every Movie object has a list of Actors along with other fields.
I want to find all the movies where the actor with a specific first and last name has worked in it.
The method below is Java 7 based where I loop over the list of Movies and then loop over a list of actors for that movie. If an actor with that first and last name is found, I break the inner loop and add that movie to the list of movies which is returned.
My question is how can I re-write this code using Java 8 streams. I can see it is a map, filter, reduce problem but I am not able to come up with a clear solution.
public List<Movie> getMoviesForActor(String firstName, String lastName) {
final List<Movie> allMovies = movieRepository.getAllMovies();
final List<Movie> movies = new ArrayList<>();
for (Movie movie : allMovies) {
boolean actorFound = false;
for (Actor actor : movie.getActors()) {
if(firstName.equalsIgnoreCase(actor.getFirstName()) && lastName.equalsIgnoreCase(actor.getLastName())) {
actorFound = true;
break;
}
}
if(actorFound) {
movies.add(movie);
}
}
return movies;
}
java stream
java stream
asked 4 mins ago
KashifKashif
11
New contributor
Kashif is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 4 mins ago
KashifKashif
11
New contributor
Kashif is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 4 mins ago
KashifKashif
11
New contributor
Kashif is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 4 mins ago
KashifKashif
11
asked 4 mins ago
KashifKashif
11
11
New contributor
Kashif is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Kashif is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Kashif is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
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