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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: 11 rules found
serialization
    Impact
      Clean code attribute
        1. "serialVersionUID" should not be declared blindly

           Code Smell
        2. Value-based objects should not be serialized

           Code Smell
        3. Files opened in append mode should not be used with "ObjectOutputStream"

           Bug
        4. "writeObject" argument must implement "Serializable"

           Bug
        5. "Serializable" inner classes of non-serializable outer classes should be "static"

           Bug
        6. Fields in non-serializable classes should not be "transient"

           Code Smell
        7. Comparators should be "Serializable"

           Code Smell
        8. "Serializable" inner classes of "Serializable" classes should be static

           Code Smell
        9. "Serializable" classes should have a "serialVersionUID"

           Code Smell
        10. The non-serializable super class of a "Serializable" class should have a no-argument constructor

           Bug
        11. Fields in a "Serializable" class should either be transient or serializable

           Code Smell

        Files opened in append mode should not be used with "ObjectOutputStream"

        intentionality - complete
        reliability
        Bug
        • serialization
        • symbolic-execution

        Why is this an issue?

        How can I fix it?

        More Info

        An ObjectOutputStream writes primitive data types and graphs of Java objects to an OutputStream. The objects can be read (reconstituted) using an ObjectInputStream.

        When ObjectOutputStream is used with files opened in append mode, it can cause data corruption and unexpected behavior. This is because when ObjectOutputStream is created, it writes metadata to the output stream, which can conflict with the existing metadata when the file is opened in append mode. This can lead to errors and data loss.

        When used with serialization, an ObjectOutputStream first writes the serialization stream header. This header should appear once per file at the beginning. When you’re trying to read your object(s) back from the file, only the first one will be read successfully, and a StreamCorruptedException will be thrown after that.

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