Ellipse.java

public class Ellipse extends Shape {
    public final float majorRadius;
    public final float minorRadius;

    private Ellipse(Color color, String name, float majorRadius, float minorRadius) {
        super(color, name);
        this.majorRadius = majorRadius;
        this.minorRadius = minorRadius;
    }

    public static class Builder extends Shape.Builder<Ellipse.Builder> {
        private float majorRadius;
        private float minorRadius;

        public Builder majorRadius(float majorRadius) {
            this.majorRadius = majorRadius;
            return this;
        }

        public Builder minorRadius(float minorRadius) {
            this.minorRadius = minorRadius;
            return this;
        }

        @Override
        public Ellipse build() {
            return new Ellipse(this.color, this.name, this.majorRadius, this.minorRadius);
        }
    }

    @Override
    public String toString() {
        return "Ellipse: name = " + name + ", color = " + color + ", major radius = " + majorRadius
                + ", minor radius = " + minorRadius;
    }
}