[jira] [Created] (CALCITE-4481) Replace some self-define methods with jdk methods in order to improve the readability

[dugenkui (Jira)]

dugenkui created CALCITE-4481:
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             Summary: Replace some self-define methods with jdk methods in 
order to improve the readability
                 Key: CALCITE-4481
                 URL: https://issues.apache.org/jira/browse/CALCITE-4481
             Project: Calcite
          Issue Type: Improvement
            Reporter: dugenkui






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