class Checker {
    public Comparator desc = new Comparator() { 
        public int compare(Player obj1, Player obj2) { 
            // compare 
        } 
    }; 
}
OR even
public Comparator desc = null; 
public Checker() { 
    desc = new Comparator() { 
        public int compare(Player p1, Player p2) { 
            //compare 
        } 
    };
}