tree a2e31655798a2d09659ec6624568a0dce2fa15a7
parent a4fe26f494ca77e93b58478e322f6dbbc99f6f22
author Chih-Hung Hsieh <chh@google.com> 1567572955 -0400
committer Chih-hung Hsieh <chh@google.com> 1567617477 +0000

Suppress warnings with suggested coding patterns.

* Use computeIfAbsent instead of check and put into a map.
* Use Ascii.equalsIgnoreCase instead of s.equalsInoreCase.
* Declare private Util() to disallow instance.

Change-Id: I4d09ccf567b461207d7a27506e028e17a4319bfd