package org.mafagafogigante.dungeon.achievements.comparators; import org.mafagafogigante.dungeon.achievements.UnlockedAchievement; import java.io.Serializable; import java.util.Comparator; class NameUnlockedAchievementComparator implements Comparator<UnlockedAchievement>, Serializable { @Override public int compare(UnlockedAchievement a, UnlockedAchievement b) { return a.getName().compareTo(b.getName()); } }