Points-inside-thet-House

import java.util.Scanner;

public class _09_PointsInsideTheHouse {

    public static void main(String[] args) {

        double[] point = readPoint();

        String result = "Outside";

        if (isInsideLeftRectangle(point) || isInsideRightRectangle(point)
                || isInsideTriangle(point)) {

            result = "Inside";

        }

        System.out.println(result);

    }

    public static boolean isInsideTriangle(double[] point) {

        double[] p1 = { 12.5, 8.5 };

        double[] p2 = { 17.5, 3.5 };

        double valueOfLineFunction1 = getValueOfLineFunction(p1, p2, point[0]);

        double[] p3 = { 22.5, 8.5 };

        double valueOfLineFunction2 = getValueOfLineFunction(p3, p2, point[0]);

        boolean result = false;

        if (valueOfLineFunction1 <= point[1]
                && valueOfLineFunction2 <= point[1] && point[1] <= 8.5) {

            result = true;

        }

        return result;
    }

    public static boolean isInsideLeftRectangle(double[] point) {

        boolean result = false;

        if (isRange(point[0], 12.5, 17.5) && isRange(point[1], 8.5, 13.5)) {

            result = true;

        }

        return result;

    }

    public static boolean isInsideRightRectangle(double[] point) {

        boolean result = false;

        if (isRange(point[0], 20, 22.5) && isRange(point[1], 8.5, 13.5)) {

            result = true;

        }

        return result;
    }

    // check whether the number is in a range min max.
    public static boolean isRange(double number, double min, double max) {

        return number >= min && number <= max;

    }

    // Read a point. Return a array with a two member. The first member is X
    // (index 0). The second is Y (index 1)
    public static double[] readPoint() {

        Scanner input = new Scanner(System.in);

        String[] inputArr = input.nextLine().split(" ");

        double[] point = new double[2];

        point[0] = Double.parseDouble(inputArr[0]);

        point[1] = Double.parseDouble(inputArr[1]);

        return point;

    }

    public static double getValueOfLineFunction(double[] point1,
            double[] point2, double x) {

        double a = (point2[1] - point1[1]) / (point2[0] - point1[0]);

        double b = point1[1]
                - ((point2[1] - point1[1]) / (point2[0] - point1[0]))
                * point1[0];

        double y = a * x + b;

        return y;
    }

}