here is a question I wanted to solve:

https://www.testdome.com/questions/java/song/88836

I came across a solution, however I am having trouble understanding part of it. Specifically, this snippet of code:

Song song1 = this;
Song song2 = this;

I have never seen the this keyword used like this. If someone can help me understand, it would be much appreciated.

public Song(String name) {
    this.name = name;
}

public void setNextSong(Song nextSong) {
    this.nextSong = nextSong;
}

public boolean isInRepeatingPlaylist() {
 
  Song song1 = this;       
  Song song2 = this; 

  while (song2 != null && song2.nextSong != null) {
     song1 = song1.nextSong;
     song2 = song2.nextSong.nextSong;
     
    if (song1 == song2) {
       return true;
     }
  }
  return false;
}

public static void main(String[] args) {
    Song first = new Song("Hello");
    Song second = new Song("Eye of the tiger");

    first.setNextSong(second);
    second.setNextSong(first);

    System.out.println(first.isInRepeatingPlaylist());
}

}