Java Style Guide: Call out that stateless lambdas are special.

Change-Id: I94c4c9fb89e6e33f2f87345218607a1ea772d800
Reviewed-on: https://chromium-review.googlesource.com/1212564
Commit-Queue: agrieve <agrieve@chromium.org>
Reviewed-by: Ted Choc <tedchoc@chromium.org>
Cr-Commit-Position: refs/heads/master@{#589572}

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2018-09-07 17:44:08 +00:00

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styleguide/java/java.md
									
				@ -30,6 +30,9 @@ is encouraged, but there are some gotchas:

				### Lambdas and Method References

				 * These are syntactic sugar for creating anonymous inner classes.

				   * Furthermore, stateless lambdas 

				     [become singletons](https://stackoverflow.com/questions/27524445/does-a-lambda-expression-create-an-object-on-the-heap-every-time-its-executed)

				     and so do not result in new instances when used in loops.

				 * Use them only where the cost of an extra class & method definition is

				   justified.

Java Style Guide: Call out that stateless lambdas are special.

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styleguide/java/java.md