SEI CERT Oracle Coding Standard for Java

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changes.mady.by.user Pamela Curtis

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When a superclass defines a finalize() method, make sure to decouple the objects that can be immediately garbage collected from those that must depend on the finalizer. This compliant solution ensures that the buffer can be reclaimed as soon as the object becomes unreachable.

Code Block
bgColor#ccccff
Classclass MyFrame {
  private JFrame frame;
  private byte[] buffer = new byte[16 * 1024 * 1024]; // now decoupled
}

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[[MITRE 2009

AA. Bibliography#MITRE 09]]

[CWE-586

http://cwe.mitre.org/data/definitions/586.html] "Explicit Call to Finalize()" and [CWE-583

http://cwe.mitre.org/data/definitions/583.html] "finalize() Method Declared Public"

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CWE-568 "finalize() Method Without super.finalize()"

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[[API 2006

AA. Bibliography#API 06]]

[finalize()

http://java.sun.com/j2se/1.4.2/docs/api/java/lang/Object.html#finalize()]

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[[Bloch 2008

AA. Bibliography#Bloch 08]]

Item 7, Avoid finalizers

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[[Boehm 2005

AA. Bibliography#Boehm 05]]

 

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[[Coomes 2007

AA. Bibliography#Coomes 07]]

"Sneaky" Memory Retention

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[[Darwin 2004

AA. Bibliography#Darwin 04]]

Section 9.5, The Finalize Method

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[[Flanagan 2005

AA. Bibliography#Flanagan 05]]

Section 3.3, Destroying and Finalizing Objects

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[[JLS 2005

AA. Bibliography#JLS 05]]

Section 12.6, Finalization of Class Instances

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