// get min element
private static void testGetMin() {
Collection<String> collection = Lists.newArrayList("5", "1", "3", "8", "4");
OrderedIterable<String> orderedIterable = FastList.newListWith("5", "1", "3", "8", "4");
Iterable<String> iterable = collection;
// get min element
String jdk = Collections.min(collection); // using JDK
String gs = orderedIterable.min(); // using GS
String guava = Ordering.natural().min(iterable); // using guava
System.out.println("min = " + jdk + ":" + guava + ":" + gs); // print min = 1:1:1
}
// get a element, if collection has only one element
private static void testGetSingle() {
Collection<String> collection = Lists.newArrayList("a3");
OrderedIterable<String> orderedIterable = FastList.newListWith("a3");
Iterable<String> iterable = collection;
// get a element, if collection has only one element
String guava = Iterables.getOnlyElement(iterable); // using guava
String jdk = collection.iterator().next(); // using JDK
String apache = CollectionUtils.extractSingleton(collection); // using Apache
assert (orderedIterable.size() != 1); // using GS
String gs = orderedIterable.getFirst();
System.out.println(
"single = " + jdk + ":" + guava + ":" + apache + ":" + gs); // print single = a3:a3:a3:a3
}
// get last element
private static void testGetLast() {
Collection<String> collection = Lists.newArrayList("a1", "a2", "a3", "a8");
OrderedIterable<String> orderedIterable = FastList.newListWith("a1", "a2", "a3", "a8");
Iterable<String> iterable = collection;
// get last element
Iterator<String> iterator = collection.iterator(); // using JDK
String jdk = "1";
while (iterator.hasNext()) {
jdk = iterator.next();
}
String guava = Iterables.getLast(iterable, "1"); // using guava
String apache = CollectionUtils.get(collection, collection.size() - 1); // using Apache
String gs = orderedIterable.getLast(); // using GS
String stream =
collection.stream().skip(collection.size() - 1).findFirst().orElse("1"); // using Stream API
System.out.println(
"last = " + jdk + ":" + guava + ":" + apache + ":" + gs + ":"
+ stream); // print last = a8:a8:a8:a8:a8
}
