*/
    public String toString() {
        String output = "";
        
        for (int i = 0; i < this.map.length; i++) {
            if (this.map[i] != null && this.map[i].getKey() != null) {
                output += "key: " + this.map[i].getKey() 
                        + " value: " + this.map[i].getValue() + "\n";
            }
        }
        output += "-----------------------";
        return output;
    }