package main; import java.io.File; import javafx.collections.FXCollections; import javafx.collections.ObservableList; public class Difficulty { public String title; public ObservableList leaderboard = FXCollections.observableArrayList(); public File notes; public void parseMetadata(File file) { title = "placeholderDiff"; } public void parseLeaderboard(File file) { //and here leaderboard.add(new LeaderboardEntry("placeholderScore", 0, "0/0/0")); } }