I am copying the Rectangle Class right ouf of the book I am studying
from.  Why do I get errors declaring color to be static.  I get " The
field color cannot be declared static, fields can only be declared in
static or top level types".  Same for the two methods that use static
color.

In addition, when I try to create an instance to test Rectangle. I get
a "no enclosing instance of type C5E1 is accessible.  What am i doing
wrong?
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public class C5E1 {
    public static void main(String[] args)
    {
        //create rectangle
        Rectangle r1 = new Rectangle();

    }//end main

    public class Rectangle
    {
        private double width = 1;
        private double height = 1;
        private static String color = "white";

        public Rectangle()
        {// default constructor
        }//end Rectangle

        public Rectangle(double width, double height, String color)
        {
        }//end Rectangle

        public double getWidth()
        {
            return width;
        }//end getWidth

        public void setWidth(double width)
        {
            this.width = width;
        }//end setWidth

        public double getHeight()
        {
            return height;
        }//end getHeight

        public void setHeight(double height)
        {
            this.height = height;
        }//end setHeight

        public static String getColor()
        {
            return color;
        }//end getColor

        public static void setColor(String color)
        {
            this.color = color;
        }//end setColor

        public double findArea()
        {
            double area = this.height * this.width;
            return area;
        }//end findArea
    }//end class rectangle
}