ADT Garis

class Point2 {
    float x;
    float y;
}

class Line {
    Point2 awal;
    Point2 akhir;
}

public class ADTGaris {

    static Point2 makePoint(float x, float y){
        Point2 temp = new Point2();
        temp.x = x;
        temp.y = y;
        return temp;
    }

    static Line makeLine(Point2 a, Point2 b){
        Line temp = new Line();
        temp.awal = a;
        temp.akhir = b;
        return temp;
    }

    static float distanceX(Point2 a, Point2 b){
        return b.x - a.x;
    }

    static float distanceY(Point2 a, Point2 b){
        return b.y - a.y;
    }

    static float gradient(Point2 a, Point2 b){
        return (b.y - a.y)/(b.x - a.x);
    }

    static void writeLine(Line a){
        System.out.println("Point awal : "+a.awal.x+" , "+a.awal.y+"\nPoint akhir : "+a.akhir.x+" , "+a.akhir.y);
    }

    public static void main(String[] args){
        Point2 a = makePoint(1, 2);
        Point2 b = makePoint(3, 4);
        Line l = makeLine(a, b);

        writeLine(l);

        System.out.println("Jarak X : "+distanceX(a, b)+"\nJarak Y : "+distanceY(a, b));
        System.out.println("Gradien garis : "+gradient(a, b));
    }
}

HASIL :

Point awal : 1.0 , 2.0
Point akhir : 3.0 , 4.0
Jarak X : 2.0
Jarak Y : 2.0
Gradien garis : 1.0