Class RectangularParallelopiped

public class RectangularParallelopiped extends

Polyhedron {

private double width, length, height;

// A constructor - It sets protected parent variables:

RectangularParallelopiped

(double theWidth, double theLength, double theHeight) {

width=theWidth; length=theLength; height=theHeight;

nFaces = 6; nVertices = 8; nEdges = 12;

}

// A concrete method for the parent’s abstract method:

public double volume() {

return width * length * height;

}