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DuplicateNumberLiteral.md

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Pattern: Duplicate number literal

Issue: -

Description

This rule checks for duplicate number literals within the current class.

Code containing duplicate Number literals can usually be improved by declaring the Number as a constant field.

By default, the rule does not analyze test files. This rule sets the default value of the doNotApplyToFilesMatching property to ignore file names ending in 'Test.groovy', 'Tests.groovy' or 'TestCase.groovy'.

Property Description Default Value
ignoreNumbers The optional comma-separated list of numbers that should be ignored (i.e., not cause a violation). 0,1

Notes

  • This rule ignores Long/long values within enums, because the generated code may include generated long id values and produce false positive rule violations.
  • This rule does not search across several files at once, only in the current file, and only within the current class.
  • You can suppress the error by annotating a class or method with the @SuppressWarnings('DuplicateNumberLiteral') annotation.

Further Reading