LongStream concat() method creates a concatenated stream in which the elements are all the elements of the first stream followed by all the elements of the second stream. The resulting stream is ordered if both of the input streams are ordered, and parallel if either of the input streams is parallel.
static LongStream concat(LongStream a, LongStream b)
- LongStream : A sequence of primitive long-valued elements.
- a : Represents the first stream.
- b : Represents the second stream.
Return Value : The function returns the concatenation of the two input LongStreams.
The calls to LongStream.concat(LongStream a, LongStream b) can be think of as forming a binary tree. The concatenation of all the input streams is at the root. The individual input streams are at the leaves. Below given is example for 3 LongStreams a, b and c.
Each additional input stream adds one layer of depth to the tree and one layer of indirection to reach all the other streams.
Note : The elements returned by LongStream.concat() method is ordered. For example, the following two lines returns the same result:
LongStream.concat(LongStream.concat(stream1, stream2), stream3); LongStream.concat(stream1, LongStream.concat(stream2, stream3));
But the result for the following two are different.
LongStream.concat(LongStream.concat(stream1, stream2), stream3); LongStream.concat(LongStream.concat(stream2, stream1), stream3);
Example 1 :
2 4 6 1 3 5
Example 2 :
2 4 6 1
- IntStream concat() in Java
- DoubleStream concat() in Java
- Stream.concat() in Java
- LongStream sum() in Java
- LongStream of() in Java
- Java String concat() with examples
- Difference between concat() and + operator in Java
- LongStream builder() in Java
- LongStream boxed() in Java
- LongStream toArray() in Java
- LongStream summaryStatistics() in Java
- LongStream parallel() in Java
- LongStream range() in Java
- LongStream sequential() in Java
- LongStream skip() in Java
If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to email@example.com. See your article appearing on the GeeksforGeeks main page and help other Geeks.
Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.