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Java

Java static code analysis

Unique rules to find Bugs, Vulnerabilities, Security Hotspots, and Code Smells in your JAVA code

  • All rules 733
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  • Quick Fix 65
Filtered: 4 rules found
java22
    Impact
      Clean code attribute
        1. Types of unused record components should be removed from pattern matching

           Code Smell
        2. Unused exception parameter should use the unnamed variable pattern

           Code Smell
        3. Unnamed variable declarations should use the "var" identifier

           Code Smell
        4. Unused local variables should be removed

           Code Smell

        Types of unused record components should be removed from pattern matching

        intentionality - clear
        maintainability
        Code Smell
        • java22
        • unused

        Why is this an issue?

        How can I fix it?

        More Info

        When using pattern matching on records, matching is done against the canonical constructor of the record. This implies listing all the components in the canonical constructor even if some are unused. To make the intent of not using the component clear, Java 22 introduced the unnamed variable pattern _.

        Because we can only pattern match against the canonical constructor, there is no need to disambiguate by specifying the types of its parameters. Therefore, the type of unused variables in pattern matching should be omitted, as it does not bring additional value.

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