optimize codes update comments

[kraity]

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[codecov-commenter]

Codecov Report

Merging #155 (631a1f7) into main (c25a583) will decrease coverage by 0.00%.
The diff coverage is 77.77%.

@@             Coverage Diff              @@
##               main     #155      +/-   ##
============================================
- Coverage     68.39%   68.38%   -0.01%     
+ Complexity     8550     8546       -4     
============================================
  Files           416      416              
  Lines         45143    45144       +1     
  Branches       8991     8991              
============================================
- Hits          30875    30873       -2     
- Misses        10631    10632       +1     
- Partials       3637     3639       +2     

Impacted Files	Coverage Δ
core/src/main/java/com/alibaba/fastjson2/JSON.java	71.93% <ø> (ø)
...main/java/com/alibaba/fastjson2/TypeReference.java	40.62% <60.00%> (-1.32%)	⬇️
...rc/main/java/com/alibaba/fastjson2/JSONObject.java	97.76% <100.00%> (-0.26%)	⬇️

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