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Stream Collect menggunakan java 8 ​

Stream to List ​

java
List<String> alphabets = Arrays.asList("aa", "bbb", "cat", "dog");
    List<String> data = alphabets.stream()
        .filter(s -> s.startsWith("c"))
        .collect(Collectors.toList());
    System.out.println(data);

Stream to Set ​

java
List<String> alphabets = Arrays.asList("aa", "bbb", "cat", "dog");
    Set<String> data = alphabets.stream()
        .filter(s -> s.startsWith("a"))
        .collect(Collectors.toSet());
    System.out.println(data);

Stream to Map ​

java
List<String> alphabets = Arrays.asList("aa", "bbb", "cat", "dog");
    Map<String, Integer> data = alphabets.stream()
        .collect(Collectors.toMap(Function.identity(), String::length));
    System.out.println(data);

Stream to ArrayList ​

java
List<String> alphabets = Arrays.asList("aa", "bbb", "cat", "dog");
    ArrayList<String> data = alphabets.stream()
        .filter(s -> s.length() > 2)
        .collect(Collectors.toCollection(ArrayList::new));
    System.out.println(data);

Straem collector ​

java
List<String> itemsList = IntStream.range(0, itemsArray.length())
    .mapToObj(i -> itemsArray.getString(i))
    .collect(Collectors.toList());