LINE

public class Line {
    private Point A;
    private Point B;

    public Line() {
        A=new Point(0, 0);
        B=new Point(0, 1);
    }

    public Line(Point A, Point B) {
        this.A = A;
        this.B = B;
    }
    public Line(double x1,double x2, double y1, double y2){
        this.A=new Point(x1,y1);
        this.B=new Point(x2,y2);
    }
    public double getLength(){
        double dx=Math.abs(A.getX()-B.getX());
        double dy=Math.abs(A.getY()-B.getY());
        return Math.sqrt(dx*dx+dy*dy);
    }

    public double getDiagonal(){
        return Math.sqrt(2)*getLength();

    }
    public double getPerimeter(){
        return 4*getLength();
    }
    public double getSquare(){

        return Math.pow(getLength(),2);
    }


    public Point getA() {
        return A;
    }

    public Point getB() {
        return B;
    }

    public void setA(Point A) {
        this.A = A;
    }

    public void setB(Point B) {
        this.B = B;
    }
    @Override
    public String toString(){
        return "Line(point A("+A.getX()+","+A.getY()+"); point B("+B.getX()+","+B.getY()+")";
    }



}