Explains Enums in java

Rectangle.java

package learnquest;

public class Rectangle {
	private final Size size;

	public Rectangle(Size size) {
		this.size = size;
	}

	public Size getSize() {
		return size;
	}

	public void getArea() {
		size.area();
	}

	public static void main(String[] args) {
		Rectangle small = new Rectangle(Size.SMALL);
		Rectangle med = new Rectangle(Size.MEDIUM);
		Rectangle large = new Rectangle(Size.LARGE);
		small.getArea();
		med.getArea();
		large.getArea();
	}
	private static void foo(Size size){
		switch(size){
		case SMALL:
			;
		case MEDIUM:
			;
		case LARGE:
			;
		}
	}
}

enum Size {
	SMALL(5, 5) {
		public void area() {
			System.out.println("Area of SMALL");
		}
	},
	MEDIUM(7, 7) {
		@Override
		public void area() {
			System.out.println("Area of MEDIUM");

		}
	},
	LARGE(10, 10) {
		@Override
		public void area() {
			System.out.println("Area of LARGE");

		}
	};
	private final int height;
	private final int width;

	private Size(int height, int width) {
		this.height = height;
		this.width = width;
	}

	public int getHeight() {
		return height;
	}

	public int getWidth() {
		return width;
	}

	public abstract void area();
}