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You can find following code examples:

• I. Compare collections in Apache, Guava, Gs Collection and JDK analog

  • 1. BiMap collection
  • 2. MultiMap collection
  • 3. Multiset collection

• II. Compare operations with collections in Apache, Guava, Gs Collection and JDK

  • 1. Operations for comparison collections (containsAll, containsAny, intersect, difference, symmetric difference, union)
  • 2. Operations for searching in collections (count, getFirst, getLast, getSingle, getMax, getMin, binarySearch, search, getByIndex, select)
  • 3. Create collections (ArrayList, HashSet, HashMap)
  • 4. Transform collections (sort, remove, retain, transform, changeAll)

• III. Examples of Stream API

• IV. Examples of Dependency injections in Dagger, Spring and Guice

• V. Examples of Natural Language Processing using OpenNLP, Stanford NLP amd so on

• VI. Examples of integration and html parsing

• VII. Examples of operation with String and Stream

• VII. Examples of operation with Array

• I. Stream API
• 1. All way to create Stream in Java 8

1. Classic: Create stream from collection | collection.stream() | Collection collection = Arrays.asList("a1", "a2", "a3");
   Stream streamFromCollection = collection.stream();
2. Create stream from values | Stream.of(value1,… ,valueN) | Stream streamFromValues = Stream.of("a1", "a2", "a3");
3. Create stream from array | Arrays.stream(array) | String[] array = {"a1","a2","a3"};
   Stream streamFromArrays = Arrays.stream(array);
4. Create stream from part of array | Arrays.stream(array, start, end) | String[] array = {"a1","a2","a3"};
   Stream streamFromArrays = Arrays.stream(array, 1, 2);
5. Create stream from file (every row from file become element of stream) | Files.lines(file_path) | Stream streamFromFiles = Files.lines(Paths.get("file.txt"));
6. Create stream from stirng (every char become element of stream) | "string".chars() | IntStream streamFromString = "123".chars();
7. Using Stream.builder | Stream.builder().add(...)....build() | Stream.builder().add("a1").add("a2").add("a3").build();
8. Create parallel stream from collection | collection.parallelStream() | Stream stream = collection.parallelStream();
9. Create infinive strean using Stream.iterate | Stream.iterate(init_value, generate_expression) | Stream streamFromIterate = Stream.iterate(1, n -> n + 1);
10. Create infinive strean using Stream.generate | Stream.generate(generate_expression) | Stream streamFromGenerate = Stream.generate(() -> "a1");
11. Create stream from path | Files.list(file_path) | Stream streamFromPath = Files.list(Paths.get(""));
12. Create stream from finding files | Files.find(file_path, max_depth, mathcher) | Stream streamFromFind = Files.find(Paths.get(""), 10, (p,a) -> true);
13. Create stream from files tree | Files.walk(file_path) | Stream streamFromFileTree = Files.walk(Paths.get(""));
14. Create stream from all entities of jar file | new JarFile(jar_file).stream() | …
15. Create stream from all entities of zip file | new ZipFile(zip_file).stream() | …
16. Create stream from iterator | StreamSupport.stream(Spliterators.spliteratorUnknownSize(iterator, 0), false) | ...
17. Create stream from iterable | StreamSupport.stream(iterable.spliterator(), false) | …
18. Create infinive stream from iterator | Stream.generate(iterator::next) | …
19. Create empty stream | Stream.empty() | Stream streamEmpty = Stream.empty();
20. Create stream from Pattern | Pattern.compile(reg_exp).splitAsStream(string) | Stream streamFromPattern = Pattern.compile(":").splitAsStream("a1:a2:a3");
21. Create stream from BufferedReader | bufferedReader.lines() | Stream streamFromBufferedReader = bufferedReader.lines();
22. Create stream from Enum | EnumSet.allOf(MyEnum.class).stream() | Stream streamFromEnum = EnumSet.allOf(MyEnum.class).stream();

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