74 lines
1.4 KiB
Java
74 lines
1.4 KiB
Java
// enums/menu/Meal2.java
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// ©2016 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
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package enums.menu;
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import onjava.*;
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public enum Meal2 {
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APPETIZER(Food.Appetizer.class),
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MAINCOURSE(Food.MainCourse.class),
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DESSERT(Food.Dessert.class),
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COFFEE(Food.Coffee.class);
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private Food[] values;
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private Meal2(Class<? extends Food> kind) {
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values = kind.getEnumConstants();
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}
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public interface Food {
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enum Appetizer implements Food {
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SALAD, SOUP, SPRING_ROLLS;
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}
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enum MainCourse implements Food {
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LASAGNE, BURRITO, PAD_THAI,
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LENTILS, HUMMOUS, VINDALOO;
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}
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enum Dessert implements Food {
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TIRAMISU, GELATO, BLACK_FOREST_CAKE,
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FRUIT, CREME_CARAMEL;
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}
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enum Coffee implements Food {
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BLACK_COFFEE, DECAF_COFFEE, ESPRESSO,
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LATTE, CAPPUCCINO, TEA, HERB_TEA;
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}
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}
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public Food randomSelection() {
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return Enums.random(values);
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}
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public static void main(String[] args) {
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for(int i = 0; i < 5; i++) {
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for(Meal2 meal : Meal2.values()) {
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Food food = meal.randomSelection();
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System.out.println(food);
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}
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System.out.println("---");
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}
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}
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}
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/* Output:
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SPRING_ROLLS
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VINDALOO
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FRUIT
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DECAF_COFFEE
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---
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SOUP
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VINDALOO
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FRUIT
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TEA
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---
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SALAD
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BURRITO
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FRUIT
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TEA
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---
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SALAD
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BURRITO
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CREME_CARAMEL
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LATTE
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---
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SOUP
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BURRITO
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TIRAMISU
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ESPRESSO
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---
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*/
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