Point.java COMPLETE

public class Point{

   private int x, y;

   public Point(){
      x = 0;
      y = 0;
   }

   public Point( int theX, int theY ){
      x = theX;
      y = theY;
   }

   public int getX(){
      return x;
   }

   public int getY(){
      return y;
   }

   public void setX( int theX ){
      x = theX;
   }

   public void setY( int theY ){
      y = theY;
   }

   public String toString(){
      return "(" + x + ", " + y + ")";
   }
/*Add the following method to the Point class:

public int quadrant()

Returns which quadrant of the x/y plane this Point object falls in. Quadrant 1 contains all points whose x and y values are both positive. Quadrant 2 contains all points with negative x but positive y. Quadrant 3 contains all points with negative x and y values. Quadrant 4 contains all points with positive x but negative y. If the point lies directly on the x and/or y axis, return 0.
*/
   public int quadrant(){
      if( y == 0 || x == 0 )
         return 0;
      else if( x > 0 && y > 0 )
         return 1;
      else if( x < 0 && y > 0 )
         return 2;
      else if( x < 0 && y < 0 )
         return 3;
      else
         return 4;
   }

   public void flip(){
      int temp = x;
      x = -y;
      y = -temp;
   }

/*Add the following method to your Point class:

public boolean isVertical(Point other)

Returns true if the given Point lines up vertically with this Point; that is, if their x coordinates are the same.
*/
   public boolean isVertical(Point other){
      if( x == other.getX() )
         return true;
      else
         return false;
   }

/*Add the following method to the Point class:

public double slope(Point other)

Returns the slope of the line drawn between this Point and the given other Point. Use the formula (y2 - y1) / (x2 - x1) to determine the slope between two points (x1, y1) and (x2, y2). Note that this formula fails for points with identical x-coordinates
*/
   public double slope(Point other){
      return (1.0 * y - other.getY())/(1.0 * x - other.getX() );
   }
}