public boolean equals(Object that) 
{
        if (this == that) {
            return true;
        } else {
            try {
                Pair other = (Pair) that;
                return (this.first.equals(other.first) && this.second
                        .equals(other.second));
            } catch (ClassCastException e) {
                return false;
            }
        }
}

Test equality of this object with that.

 public final Object getFirst() 
{
        return first;
}

Get the first object in the pair.

 public final Object getSecond() 
{
        return second;
}

Get the second object in the pair.

 public int hashCode() 
{
        return (17 * first.hashCode()) + second.hashCode();
}

 public final  void setFirst(Object first) 
{
        this.first = first;
}

Set the value of the first object in the pair.

 public final  void setSecond(Object second) 
{
        this.second = second;
}

Set the second object in the pair.