Apresentação sobre google collection

1. Wende Mendes HiginoWende Mendes Higino
email: wende.mendes@bluesoft.com.bremail: wende.mendes@bluesoft.com.br
Google CollectionsGoogle Collections

2. ObjetivoObjetivo

3. Google CollectionsGoogle Collections
- List- List
- Set- Set
- Map- Map
- Multimap- Multimap
- Multiset- Multiset

4. Google CollectionsGoogle Collections
ListList

5. Google CollectionsGoogle Collections
Antes:
final List<String> dias = new ArrayList<String>();
dias.add("Segunda");
dias.add("Terça");
Agora:
final List<String> dias = Lists.newArrayList("Segunda", "Terça");

6. Google CollectionsGoogle Collections
MapMap

7. Google CollectionsGoogle Collections
Antes:
final Map<Integer, Fornecedor> fornecedores = new HashMap<Integer,
Fornecedor>();
fornecedores.put(1, new Fornecedor(1, "Bolha Peixes"));
fornecedores.put(2, new Fornecedor(1, "Lui Bebidas"));
Agora:
final Map<Integer, Fornecedor> fornecedoresGoogle = Maps.newHashMap();
fornecedoresGoogle.put(1, new Fornecedor(1, "Bolha Peixes"));
fornecedoresGoogle.put(2, new Fornecedor(1, "Lui Bebidas"));

8. Google CollectionsGoogle Collections
Antes:
Map<Integer, String> imutableMapAntigo;
final Map<Integer, String> mapAntigo = new HashMap<Integer, String>();
mapAntigo.put(1, "Bolha");
mapAntigo.put(2, "Wende");
imutableMapAntigo = Collections.unmodifiableMap(mapAntigo);
Agora:
ImmutableMap<Integer, String> immutableMap = ImmutableMap.of(1, "Bolha", 2, "Wende");

9. Google CollectionsGoogle Collections
Set

10. Google CollectionsGoogle Collections
- HashSet;
- LinkedHashSet;
- TreeSet;
- ImmutableSet

11. Google CollectionsGoogle Collections
Antes:
final Set<String> dias = new HashSet<String>();
dias.add("Segunda");
dias.add("Terça");
Ou:
final Set<String> dias = new HashSet<String>(Arrays.asList("Segunda", "Terça");
Agora:
final Set<String> dias = Sets.newHashSet("Segunda", "Terça");
Console:
Terça, Segunda ou Segunda, Terça

12. Google CollectionsGoogle Collections
Antes:
final Set<String> dias = new LinkedHashSet<String>();
dias.add("Segunda");
dias.add("Terça");
dias.add("Quarta");
Agora:
final Set<String> dias = Sets.newLinkedHashSet();
dias.add("Segunda");
dias.add("Terça");
dias.add("Quarta");
Console:
Segunda, Terça, Quarta

13. Google CollectionsGoogle Collections
Antes:
final Set<String> dias = new TreeSet<String>();
dias.add("Segunda");
dias.add("Terça");
dias.add("Quarta");
Agora:
final Set<String> dias = Sets.newTreeSet();
dias.add("Segunda");
dias.add("Terça");
dias.add("Quarta");
Console:
Quarta, Segunda, Terça

14. Google CollectionsGoogle Collections
Antes:
Set<String> setAntigo = new HashSet<String>();
setAntigo.add("Bolha");
setAntigo.add("Wende");
Collection<String> imutableSetAntigo = Collections.unmodifiableCollection(setAntigo);
Agora:
ImmutableSet<String> immutableSet = ImmutableSet.of("Lui", "Bolha");

15. Google CollectionsGoogle Collections
MultimapsMultimaps

16. Google CollectionsGoogle Collections
Antes:
final Map<Integer, List<Fornecedor>> map = new HashMap<Integer,
List<Fornecedor>>();
public void popular(final Integer fornecedorKey, final Fornecedor fornecedor) {
List<Fornecedor> fornecedores = map.get(fornecedorKey);
if (fornecedores == null) {
fornecedores = new ArrayList<Fornecedor>();
map.put(fornecedorKey, fornecedores);
}
fornecedores.add(fornecedor);
}

17. Google CollectionsGoogle Collections
Agora:
- ArrayListMultimap;
- LinkedListMultimap;
- TreeMultimap;
- HashMultimap;
- LinkedHashMultimap;
- ImmutableListMultimap
- ImmutableSetMultimap

18. Google CollectionsGoogle Collections
Agora:
final Multimap<Integer, Fornecedor> multimap = ArrayListMultimap.create();
public void popular(final Integer fornecedorKey, final Fornecedor fornecedor) {
multimap.put(fornecedorKey, fornecedor);
}

19. Google CollectionsGoogle Collections
final Multimap<Integer, Fornecedor> multimap = ArrayListMultimap.create();
multimap.put(1, "Lui");
multimap.put(2, "Wende");
multimap.put(2, "Wende");
multimap.put(2, "Wende");
multimap.put(1, "Andre");
multimap.put(2, "Bolha");
Console:
1 = {Lui, André}
2 = {Wende, Wende, Wende, Bolha}

20. Google CollectionsGoogle Collections
final Multimap<Integer, String> multimap = HashMultimap.create();
multimap.put(1, "Lui");
multimap.put(2, "Bolha");
multimap.put(2, "Wende");
multimap.put(2, "Wende");
multimap.put(2, "Wende");
multimap.put(1, "Andre");
Console:
1 = {André, Lui}
2 = {Wende, Bolha}

21. Google CollectionsGoogle Collections
final Multimap<Integer, String> multimap = LinkedHashMultimap.create();
multimap.put(1, "Lui");
multimap.put(2, "Bolha");
multimap.put(2, "Wende");
multimap.put(2, "Wende");
multimap.put(2, "Wende");
multimap.put(1, "Andre");
Console:
1 = {Lui, André}
2 = {Bolha, Wende}

22. Google CollectionsGoogle Collections
final Multimap<Integer, String> multimap = TreeMultimap.create();
multimap.put(1, "Lui");
multimap.put(2, "Bolha");
multimap.put(2, "Wende");
multimap.put(2, "Wende");
multimap.put(2, "Wende");
multimap.put(1, "Andre");
Console:
1 = {André, Lui}
2 = {Bolha, Wende}

23. Google CollectionsGoogle Collections
Agora:
Multimap<Integer, String> multimap =
ImmutableListMultimap.of(1, "Lui", 2, "Wende", 1, "China", 1, "Lui");
Console:
1 = { Lui, China, Lui }
2 = { Wende }

24. Google CollectionsGoogle Collections
Agora:
Multimap<Integer, String> multimap = ImmutableSetMultimap.of(1, "Lui", 2,
"Wende", 1, "China", 1, "Lui");
Console:
1 = { Lui, China}
2 = { Wende }

25. Google CollectionsGoogle Collections
MultisetsMultisets

26. Google CollectionsGoogle Collections
- HashMultiset
- LinkedHashMultiset
- TreeMultiset
- EnumMultiset

27. Google CollectionsGoogle CollectionsAgora:
Multiset<String> nomes = HashMultiset.create();
nomes.add("Wende");
nomes.add("China", 3);
nomes.add("Bolha");

28. Google CollectionsGoogle Collections
for (final String nome : nomes) {
System.out.println(nome);
}
O que será impresso ???

29. Google CollectionsGoogle Collections
Console:
Wende, Bolha, China, China, China

30. Google CollectionsGoogle Collections
System.out.println(nomes.elementSet());
Console:
Wende, Bolha, China
System.out.println(nomes.count("China"));
Console:
3
System.out.println(nomes.size());
Console:
5

31. Google CollectionsGoogle Collections
enum Fornecedor {
BolhaPeixes, DouglasCafe
}
final EnumMultiset<Fornecedor> fornecedores = EnumMultiset.create(Fornecedor.class);
fornecedores.add(Fornecedor.BolhaPeixes);
fornecedores.add(Fornecedor.BolhaPeixes);
fornecedores.add(Fornecedor.BolhaPeixes);
fornecedores.add(Fornecedor.DouglasCafe);
System.out.println(fornecedores.elementSet());
Console:
BolhaPeixes, DouglasCafe

32. Google CollectionsGoogle Collections
Também tenho estas opções:
final Multiset<String> nomes = LinkedHashMultiset.create();
final Multiset<String> nomes = TreeMultiset.create();

34. ImagensImagens
http://www.flickr.com/photos/dannysullivan/272645770/
http://www.flickr.com/photos/northbaywanderer/121971249/
http://www.fl ickr.com/photos/colm/551068416/
http://www.fl ickr.com/photos/vermininc/2335148856/
http://www.fl ickr.com/photos/caveman_92223/3185534518/
http://www.fl ickr.com/photos/fdecomite/2908653728/