Line Intersect

public class LineIntersect {
    static class Point {
        float x, y;

        public Point(float x, float y) {
            this.x = x;
            this.y = y;
        }

        public String toString() {
            return String.format("(%.2f, %.2f)", x, y);
        }
    }

    static class Line {
        float slope, intcpt;

        public Line(float slope, float intcpt) {
            this.slope = slope;
            this.intcpt = intcpt;
        }

        public String toString() {
            return String.format("y = %.2fx + %.2f", slope, intcpt);
        }
    }

    /** Calculates the value of y, given a line and an x-coordinate. */
    static float calculateSlopeIntercept(Line line, float x) {
        return line.slope * x + line.intcpt;
    }

    /**
     * Finds the intersection of two lines. If the slopes of the lines are
     * equal, null will be returned.
     */
    static Point findIntersection(Line line1, Line line2) {
        if (line1.slope == line2.slope) {
            return null;
        }
        float x = (line2.intcpt - line1.intcpt) / (line1.slope - line2.slope);
        return new Point(x, calculateSlopeIntercept(line1, x));
    }

    public static void main(String[] args) {
        Line line1 = new Line(1, 3);
        Line line2 = new Line(-2, 12);

        /* Print out the point of intersection. */
        System.out.println("Line #1: " + line1);
        System.out.println("Line #2: " + line2);
        System.out.println("\nIntersection: " + findIntersection(line1, line2));
    }
}