A labeled point has x- and y-coordinates and a string label. Provide a class LabeledPoint with a constructor LabeledPoint(int x, int y, String label) and hashCodeand equals methods. Two labeled points are considered the same when they have the same location and label.
Modify the LabeledPoint class of Exercise given above so that it implements the Comparable interface. Sort points first by their x-coordinates. If two points have the same x-coordinate, sort them by their y-coordinates. If two points have the same x- and y-coordinates, sort them by their label. Write a tester program that checks all cases by inserting points into a TreeSet.
