CoordinateSequence2D implements CoordinateSequence, Cloneable { public double getX(int index) { return x[index]; } CoordinateSequence2D(int n);  CoordinateSequence2D(double... xy); int getDimension(); Coordinate getCoordinate(int index); Coordinate getCoordinateCopy(int index); void getCoordinate(int index, Coordinate coord); double getX(int index); double getY(int index); double getOrdinate(int index, int ordinateIndex); int size(); void setOrdinate(int index, int ordinateIndex, double value); void setX(int index, double value); void setY(int index, double value); void setXY(int index, double x, double y); Coordinate[] toCoordinateArray(); Envelope expandEnvelope(Envelope env); @Override Object clone(); CoordinateSequence copy();  }
@Test public void testGetX() { CoordinateSequence2D cs = new CoordinateSequence2D(1.2, 3.4); assertEquals(1.2, cs.getX(0), TOL); }