// Fig. 16.20: FactoryMethods.java
// Java SE 9 collection factory methods.
import java.util.List;
import java.util.Map;
import java.util.Set;

public class FactoryMethods {
   public static void main(String[] args) {
      // create a List 
      List<String> colorList = List.of("red", "orange", "yellow", 
         "green", "blue", "indigo", "violet");
      System.out.printf("colorList: %s%n%n", colorList);

      // create a Set
      Set<String> colorSet = Set.of("red", "orange", "yellow", 
         "green", "blue", "indigo", "violet");
      System.out.printf("colorSet: %s%n%n", colorSet);

      // create a Map using method "of"
      Map<String, Integer> dayMap = Map.of("Monday", 1, "Tuesday", 2,
         "Wednesday", 3, "Thursday", 4, "Friday", 5, "Saturday", 6,
         "Sunday", 7);
      System.out.printf("dayMap: %s%n%n", dayMap);

      // create a Map using method "ofEntries" for more than 10 pairs
      Map<String, Integer> daysPerMonthMap = Map.ofEntries(
         Map.entry("January", 31),
         Map.entry("February", 28),
         Map.entry("March", 31),
         Map.entry("April", 30),
         Map.entry("May", 31),
         Map.entry("June", 30),
         Map.entry("July", 31),
         Map.entry("August", 31),
         Map.entry("September", 30),
         Map.entry("October", 31),
         Map.entry("November", 30),
         Map.entry("December", 31)
      );
      System.out.printf("monthMap: %s%n", daysPerMonthMap);
   }
}



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