public class Rectangle {

private double length;

private double width;

private static int numRectangles;

public Rectangle() {

this(1.0, 1.0);

}//end no-arg ctor

public Rectangle(double length, double width) {

this.length = length;

this.width = width;

numRectangles++;

}//end ctor

public double getLength() {

return length;

}

public double getWidth() {

return width;

}

public void setLength(double length) {

this.length = length;

}

public void setWidth(double width) {

this.width = width;

}

public double area() {

return length * width;

}

public double perimeter() {

return 2 * length + 2 * width;

}

public static int getNumRectangles() {

return numRectangles;

}

}