public boolean equals(Object obj) {
if (obj instanceof Pair) {
Pair po = (Pair) obj;
return po.toString().equals(this.toString());
}
return false;
}
public int compareTo(Object o) {
if (o instanceof Pair) {
Pair po = (Pair) o;
String thisString = this.toString();
String poString = po.toString();
return thisString.compareTo(poString);
}
return -1;
}