LinkedList inside a LinkedList iteration in java

Im trying to iterate a Linked List inside of a linked list but I'm not sure how to proceed with it. I'm used to using a passed parameter for what will be iterated but when I'm iterating a linked list within a linked list and plan to iterate until I hit a record that matches a passed dummy object.

Here is an example of what I’m trying to do

private static boolean addSongFromAlbumToAlbum(LinkedList<Album> albums1, LinkedList<Song> targetAlbum,
String title){
//creating a dummy song for comparison of title parameter with arbitrary time duration.
Song dummySong = new Song(title, 000);
ListIterator<Album> album1ListIterator = albums1.listIterator();
ListIterator<Song> targetAlbumListIterator = targetAlbum.listIterator();
//nested album iterator
ListIterator<Song> nestedAlbumInAlbum = nestedAlbum.listIterator();
//checking whether the song with the "title" parameter entered exists in the LinkedList
//of albums
while(album1ListIterator.hasNext()){
while(nestedAlbumInAlbum.hasNext()){
//checking if current iteration has an object with same value for title as title parameter.
Song comparisonSongToAdd = nestedAlbumInAlbum.next();
int comparisonValue = comparisonSongToAdd.getTitle().compareTo(title);
if(comparisonValue ==0){
//check whether the found object already exists in the album
while (targetAlbumListIterator.hasNext()){
SongComparator comparator = new SongComparator(); //create new comparator object to compare
int comparatorValue = comparator.compare(comparisonSongToAdd, targetAlbumListIterator.next());
if (comparatorValue == 0) {
System.out.println(comparisonSongToAdd + " already exists in the Album. please choose\n a different song.");
return false;
}//end if comparator
}//end target album while
targetAlbumListIterator.add(comparisonSongToAdd);
}//end if song title found
}//end nested album while
}//end albums while iterator
return true;
}//end addSongFromAlbum method

///Here is the SongComparator class

public class SongComparator implements Comparator<Song> {
public int compare(Song song1, Song song2){
if(song1.getTitle() == song2.getTitle() && song1.getDurationSeconds() == song2.getDurationSeconds()){
return 0;
}else{
return -1;
}
}
}

How am I supposed to iterate the LinkedList within the LinkedList of albums without a parameter? And if it requires a parameter how I’m I supposed to determine what to use for the parameter considering it will be changing with each iteration of the outer while loop.

you can use java 8 streams,
instead of creating iterators,

in order to find whats in album 1 and album 2 use:

    albums1.forEach(album1Element -> {
//keeps only what returns true in the filter.
List<Song> listOfSongsToAdd = targetAlbum.filter(song -> song.compareTo(title)).collect(Collectors.toList);
listOfSongsToAdd.forEach(songToAdd -> {
...
});
});

Check below line of code. Here, next() returns a Song object and title is a String object. These both cannot be compared. You may have to call nestedAlbumInAlbum.next() and store the object in a Song reference variable and compare song.getTitle() with title.

int comparisonValue = nestedAlbumInAlbum.next().compareTo(title);

Also, you are calling nestedAlbumInAlbum.next() multiple times. 1 instance is above, another instance is within the if condition. You should restrict calling next() method only once for iteration. Each time when you call nestedAlbumInAlbum.next(), it returns the next Song object.