Re: FindBugs complaining about non-serializable field although everything looks Serializable

From:
Daniel Pitts <newsgroup.nospam@virtualinfinity.net>
Newsgroups:
comp.lang.java.programmer
Date:
Thu, 12 Jan 2012 09:52:42 -0800
Message-ID:
<K5FPq.74067$ed2.70254@newsfe05.iad>
On 1/12/12 9:48 AM, laredotornado@zipmail.com wrote:

On Jan 12, 11:04 am, Jeff Higgins<j...@invalid.invalid> wrote:

On 01/12/2012 11:40 AM, laredotorn...@zipmail.com wrote:

Hi,

I'm using Java 1.6. My FindBugs tool is giving me this error ...

      Non-transient non-serializable instance field in serializable


?<http://findbugs.sourceforge.net/bugDescriptions.html#SE_BAD_FIELD>

class
      Class com.myco.clearing.common.xml.Node defines non-transient non-
serializable instance field children

The class and its private fields that Findbugs is complaining about
are below ...

      public class Node implements Serializable, Comparable<Node>,
Cloneable {
    /**
     * For serializable classes.
     */
    private static final long serialVersionUID = 1L;

    /**
     * Unique id
     */
    private long id;
    /**
     * Node Name
     */
    private String name;
    /**
     * Node value
     */
    private String value = "";
    /**
     * Child nodes
     */
    private List<Node> children;
    /**
     * Parent node
     */
    private Node parent;
    /**
     * Node attributes
     */
    private List<Attribute> attributes;

I have a public, no-argument constructor and getter/setter methods for
all the fields you see (except serialVersionUID). Any ideas why
FindBugs is complaining about the field "children" or how I can
troubleshoot this further?

The above references a class, "Attribute". The relevant parts are
below. Same thing -- a public, no-argument constructor and getter/
setter methods present.

      public class Attribute implements Serializable, Cloneable {

    /**
     * For serializable classes.
     */
    private static final long serialVersionUID = 1L;

    /**
     * Attribute Name
     */
    private String name;
    /**
     * Attribute value, can be local or inherited
     */
    private String value;
    /**
     * Node having this attribute
     */
    private Node node;

Thanks, - Dave


Hi, I read that, but all fields are serializable, including
java.util.List. So, I'm not seeing what is throwing it off, do you? -
Dave

Check again. java.util.List is not Serializable.

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