Create a new class called Quadrilateral that extends Shape and implement the following constructor.

protected Quadrilateral(Point[] aPoints)

This constructor calls the superclasss constructor and passes it the name "Quadrilateral". It then passes a copy of the first four entries in the aPoints array to the setPoints method.

Override the following methods.

4

1. public double getPerimeter()

This method calculates the perimeter of the Quadrilateral. The perimeter of a quadrilateral is the sum of the lengths its sides (to get the length of a side, calculate the distance between the two of its vertices).

2. public double getArea()

This method calculates the area of the Quadrilateral. If the vertices of a quadrilateral are A = (ax,ay), B = (bx,by), C = (cx,cy), and D = (dx,dy), then the area of the quadrilateral is given by the expression

[(axby aybx)+(bxcy bycx)+(cxdy cydx)+(dxay dyax)] / 2

Here is my code for shape

import java.awt.Point;

public abstract class Shape {

private String name;

private Point[] points;

protected Shape(String aName) {

this.name = aName;

}

public final String getName() {

return this.name;

}

protected final void setPoints(Point[] thePoints) {

this.points = thePoints;

}

public final Point[] getPoints() {

return this.points;

}

public static double getDistance(Point p1, Point p2) {

double x1 = p1.getX();

double x2 = p2.getX();

double y1 = p1.getY();

double y2 = p2.getY();

double add1 = x1 - x2;

double sqr1 = add1 * add1;

double add2 = y1 - y2;

double sqr2 = add2 * add2;

double sqrt = sqr2 + sqr1;

return Math.sqrt(sqrt);

}

abstract double getPerimeter();// Just Remove Method body

}