Get Slice of a Primitive Array in Java

In this post, we will see how to get slice of a primitive array in Java. In other words, get subarray of a given primitive array between specified indexes.


 

1. Arrays.copyOfRange()

The idea is to use Arrays.copyOfRange() to copy the specified range of the specified array into a new array. Arrays class provides several overloaded versions of copyOfRange() method, for all primitive types.

 

Download   Run Code

Output:

[2, 3, 4, 5]

 

2. Java 8

From Java 8 onwards, we can simply get a Stream of elements between the specified range and then call toArray() method to accumulate elements of the stream into corresponding primitive array.

 

Download   Run Code

Output:

[2, 3, 4, 5]

 

3. ArrayUtils.subarray() in Apache Commons

Apache Commons provides ArrayUtils class that has several utility methods for primitive arrays. It has subarray() method that can produce a primitive subarray containing the elements between specified indexes.

 

Download

Output:

[2, 3, 4, 5]

 

4. Naive

Finally, we can also write our own custom method which creates a new array and copy the elements from original array to new array by iterating over the array between specified indexes.

 

Download   Run Code

Output:

[2, 3, 4, 5]

 
1 Star2 Stars3 Stars4 Stars5 Stars (1 votes, average: 5.00 out of 5)

Loading...

Thanks for reading.

Please use our online compiler to post code in comments. To contribute, get in touch with us.
Like us? Please spread the word and help us grow. Happy coding 🙂
 



Leave a Reply

avatar
  Subscribe  
Notify of