course.java

来自「《Java编程思想》第四版源代码」· Java 代码 · 共 18 行

//: enumerated/menu/Course.java
package enumerated.menu;
import net.mindview.util.*;

public enum Course {
  APPETIZER(Food.Appetizer.class),
  MAINCOURSE(Food.MainCourse.class),
  DESSERT(Food.Dessert.class),
  COFFEE(Food.Coffee.class);
  private Food[] values;
  private Course(Class<? extends Food> kind) {
    values = kind.getEnumConstants();
  }
  public Food randomSelection() {
    return Enums.random(values);
  }
} ///:~