Java Program to Find Direction of a Point from a Line Segment

import java.awt.Point; 
import java.util.Scanner;
import static java.lang.Math.*;
public class Main
{
    // Static constant values
    static int RIGHT = 1, LEFT = -1, ZERO = 0;
    public static void main(String[] args)
    {
        Scanner scan = new Scanner(System.in);        
        //Coordinates of the line
        Point a = new Point(-30,10);
        Point b = new Point(29,-15);
        //Coordinates of the line
        Point p = new Point(15,28);
        // Calls the function to find the direction of point w.r.t. the line segment
        int dir = pointDirection(a,b,p);
        if (dir == 1)
            System.out.println("Point is towards the right of the line");
        else if (dir == -1)
            System.out.println("Point is towards the left of the line");
        else
            System.out.println("Point is on the Line");
    }
    
    // Function to calculate direction of  the point from the line segment
    static int pointDirection(Point A, Point B, Point P)
    {
        // Subtracting the coordinates of the first point 
        // from the rest points to make A origin
        B.x -= A.x;
        B.y -= A.y;
        P.x -= A.x;
        P.y -= A.y;
        //Cross product formula
        int crossPro = B.x * P.y - B.y * P.x;
        // Returns zero,right or left based on the sign of the crossproduct
        if (crossPro > 0)
            return RIGHT; 
        if (crossPro < 0)
            return LEFT;
        return ZERO;
    }
}

Output:

Point is towards the right of the line