Java中Enum方法toString与ordinal方法

public enum Language {
     C, Java, PHP;
}

public class EnumDemo {

    public static void main(String args[]) {

         // returns the name of this enum constant（String）
         System.out.println("Programming in " + Language.C.toString());
         System.out.println("Programming in " + Language.Java.toString());
         System.out.println("Programming in " + Language.PHP.toString());
         // returns the ordinal of this enum constant，start with 0 （int）
         System.out.println("Programming in " + Language.C.ordinal());
         System.out.println("Programming in " + Language.Java.ordinal());
         System.out.println("Programming in " + Language.PHP.ordinal());
       }

}