JAvaでの列挙タイプEnum

/*
	    Enum
*/
public class TestEnum {
	//      MyColor，MyDoorOpener，    
	public enum MyColor { red, green, blue };
	public enum MyDoorOpener {me, mywife};
	
	public static void main(String[] args) {
		//      MyColor  red，MyColor.red          
		//   MyColor   ，        
		MyColor m = MyColor.red;
		//  m  
		switch(m) {
			case red:
				System.out.println("red");
				break;
			case green:
				System.out.println("green");
				break;
			default:
				System.out.println("default");
		}
		System.out.println(m);
	}
}

F:\java>javac TestEnum.java

F:\java>java TestEnum
red
red

F:\java>