Streams

Stream represents a sequence of objects from a source, which supports aggregate operations.

Basic Points of Streams :

1. Not a data structure
2. Designed for lambdas
3. Do not support indexed access
4. Can easily be outputted as arrays or lists
5. Lazy access supported
6. Parallelizable

---

Stream.of(val1, val2, val3….)

public class StreamBuilders {
      public static void main(String[] args) {
            Stream stream = Stream.of(1,2,3,4,5,6,7,8,9);
            stream.forEach(p -> System.out.println(p));
      }
}

---

Stream.of(arrayOfElements)

public class StreamBuilders {
      public static void main(String[] args) {
            Stream stream = Stream.of( new Integer[]{1,2,3,4,5,6,7,8,9} );
            stream.forEach(p -> System.out.println(p));
      }
}

---

List.stream()

public class StreamBuilders {
      public static void main(String[] args) {
            List list = new ArrayList();
            for(int i = 1; i< 10; i++) {
                  list.add(i);
            }
            Stream stream = list.stream();
            stream.forEach(p -> System.out.println(p));
      }
}

---

Stream.generate() or Stream.iterate()

public class StreamBuilders {
      public static void main(String[] args) {
            Stream stream = Stream.generate(() -> { return new Date(); });
            stream.forEach(p -> System.out.println(p));
            }
}

---

String chars or String Tokens (First Model)

public class StreamBuilders {
      public static void main(String[] args) {
            IntStream stream = "12345_abcdefg".chars();
            stream.forEach(p -> System.out.println(p));
      }
}

---

String chars or String Tokens (Second Model)

public class StreamBuilders {
      public static void main(String[] args) {
            Stream stream = Stream.of("A$B$C".split("\\$"));
            stream.forEach(p -> System.out.println(p));
      }
}