// EnumDemo.java - demonstrates some enum features
// cmc, 10/10/05

import java.util.Scanner;

public class EnumDemo {
    
    // define an enumeration to represent types of fruit
    enum Fruit { APPLE, PEAR, ORANGE, GRAPE, PEACH }  // no semi-colon required

    public static void main(String[] args) {

        // print all fruit types by enhanced for loop over the values
        System.out.println("Fruit choices:");
        for (Fruit f : Fruit.values() )
            System.out.println(f);

        // get a fruit type from the user as a string
        System.out.println("What type of fruit do you want?");
        Scanner in = new Scanner(System.in);
        String fruitString = in.next();

        // get associated Fruit - may throw IllegalArgumentException
        Fruit userFruit = Fruit.valueOf(fruitString);

        // use values as constant case labels of switch structure
        switch (userFruit) { // compiler knows the cases are Fruit values
            case APPLE: case PEACH:
                System.out.println("Umm. Good for pie.");
                break;
            case PEAR:
                System.out.println("Hmmm. Odd shape.");
                break;
            case ORANGE: case GRAPE:
                System.out.println("Ahh. Refreshing juice.");
        }

        // but must spell out completely in some situations
        // if (userFruit == PEAR)... causes "cannot find symbol" error
        if (userFruit == Fruit.PEAR) // compiler insists on Fruit.
            System.out.println(" :-)");
    }
}