OnJava8-Examples/collectiontopics/SetOrder.java

// collectiontopics/SetOrder.java
// (c)2017 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
import java.util.*;
import onjava.HTMLColors;

public class SetOrder {
  static String[] sets = {
    "java.util.HashSet",
    "java.util.TreeSet",
    "java.util.concurrent.ConcurrentSkipListSet",
    "java.util.LinkedHashSet",
    "java.util.concurrent.CopyOnWriteArraySet",
  };
  static final List<String> RLIST =
    new ArrayList<>(HTMLColors.LIST);
  static {
    Collections.reverse(RLIST);
  }
  public static void
  main(String[] args) throws Exception {
    for(String type: sets) {
      System.out.format("[-> %s <-]%n",
        type.substring(type.lastIndexOf('.') + 1));
      @SuppressWarnings("unchecked")
      Set<String> set = (Set<String>)
        Class.forName(type).newInstance();
      set.addAll(RLIST);
      set.stream()
        .limit(10)
        .forEach(System.out::println);
    }
  }
}
/* Output:
[-> HashSet <-]
MediumOrchid
PaleGoldenRod
Sienna
LightSlateGray
DarkSeaGreen
Black
Gainsboro
Orange
LightCoral
DodgerBlue
[-> TreeSet <-]
AliceBlue
AntiqueWhite
Aquamarine
Azure
Beige
Bisque
Black
BlanchedAlmond
Blue
BlueViolet
[-> ConcurrentSkipListSet <-]
AliceBlue
AntiqueWhite
Aquamarine
Azure
Beige
Bisque
Black
BlanchedAlmond
Blue
BlueViolet
[-> LinkedHashSet <-]
YellowGreen
Yellow
WhiteSmoke
White
Wheat
Violet
Turquoise
Tomato
Thistle
Teal
[-> CopyOnWriteArraySet <-]
YellowGreen
Yellow
WhiteSmoke
White
Wheat
Violet
Turquoise
Tomato
Thistle
Teal
*/