Is there any method to sum elements in JAVA?

Is there any method to sum elements in JAVA?

References

Reference NO 1

http://stackoverflow.com/questions/15187774/is-there-any-method-to-sum-elements-in-java

Reference NO 2

http://stackoverflow.com/questions/5963847/is-there-possibility-of-sum-of-arraylist-without-looping

Reference NO 3

http://www.javacodegeeks.com/2013/02/40-java-collections-interview-questions-and-answers.html

Reference NO 4

http://www.techempower.com/blog/2013/03/26/everything-about-java-8/

Reference NO 5

http://java-performance.info/arraylist-performance/

Reference NO 6

http://introcs.cs.princeton.edu/21function

Reference NO 7

http://www.leepoint.net/notes-java/flow/methods/50static-methods.html

Reference NO 8

http://javarevisited.blogspot.com/2012/02/how-to-check-or-detect-duplicate.html