Functional Programming - Fixed length Streams

There are multiple ways using which we can create fix length streams.

Using Stream.of() method

Using Collection.stream() method

Using Stream.builder() method

Following example shows all of the above ways to create a fix length stream.

Example - Fix Length Stream

import java.util.Arrays;
import java.util.List;
import java.util.stream.Stream;

pubpc class FunctionTester {    
   pubpc static void main(String[] args) {

      System.out.println("Stream.of():");
      Stream<Integer> stream  = Stream.of(1, 2, 3, 4, 5);       
      stream.forEach(System.out::println);

      System.out.println("Collection.stream():");
      Integer[] numbers = {1, 2, 3, 4, 5};     
      List<Integer> pst = Arrays.asList(numbers);
      pst.stream().forEach(System.out::println);

      System.out.println("StreamBuilder.build():");
      Stream.Builder<Integer> streamBuilder = Stream.builder();
      streamBuilder.accept(1);
      streamBuilder.accept(2);
      streamBuilder.accept(3);
      streamBuilder.accept(4);
      streamBuilder.accept(5);
      streamBuilder.build().forEach(System.out::println);    
   }   
}

Output

Stream.of():
1
2
3
4
5
Collection.stream():
1
2
3
4
5
StreamBuilder.build():
1
2
3
4
5