This is how do it with Java.
public class MongoClient{
private final MongoDatabase mongoDatabase;
public MongoClient() {
com.mongodb.MongoClient mongoClient = new com.mongodb.MongoClient(
new MongoClientURI(
"StringURLtoMongodb"
)
);
this.mongoDatabase = mongoClient.getDatabase("databaseName );
}
public void changeField(String newValue) {
MongoCollection<Document> collection = mongoDatabase.getCollection("students");
Bson filter = eq("Name", "Peter");
Bson update = set("student.0.something.something.field, newValue);
collection.updateOne(filter, update);
}
}