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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
  • Vulnerability60
  • Bug175
  • Security Hotspot40
  • Code Smell458

  • Quick Fix 65
Filtered: 9 rules found
java16
    Impact
      Clean code attribute
        1. 'serialVersionUID' field should not be set to '0L' in records

           Code Smell
        2. Equals method should be overridden in records containing array fields

           Bug
        3. Reflection should not be used to increase accessibility of records' fields

           Bug
        4. Custom getter method should not be used to override record's getter behavior

           Code Smell
        5. Members ignored during record serialization should not be used

           Bug
        6. Redundant constructors/methods should be avoided in records

           Code Smell
        7. Records should be used instead of ordinary classes when representing immutable data structure

           Code Smell
        8. "Stream.toList()" method should be used instead of "collectors" when unmodifiable list needed

           Code Smell
        9. Pattern Matching for "instanceof" operator should be used instead of simple "instanceof" + cast

           Code Smell

        'serialVersionUID' field should not be set to '0L' in records

        intentionality - clear
        maintainability
        Code Smell
        • java16

        Why is this an issue?

        More Info

        In Records serialization is not done the same way as for ordinary serializable or externalizable classes. Records serialization does not rely on the serialVersionUID field, because the requirement to have this field equal is waived for record classes. By default, all records will have this field equal to 0L and there is no need to specify this field with 0L value and it is possible to specify it with some custom value to support serialization/deserialization involving ordinary classes.

        This rule raises an issue when there is a private static final long serialVersionUID field which is set to 0L in a Record class.

        Noncompliant code example

        record Person(String name, int age) implements Serializable {
        @Serial
          private static final long serialVersionUID = 0L; // Noncompliant
        }
        

        Compliant solution

        record Person(String name, int age) implements Serializable {} // Compliant
        
        record Person(String name, int age) implements Serializable {
        @Serial
          private static final long serialVersionUID = 42L; // Compliant
        }
        
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