Java Serialization ArrayList

Question

When an ArrayList in java is serialized, are the objects stored in it serialized with it? Or do I have to get and serialize all of it's contents?

Peter Lawrey · Accepted Answer · 2012-12-19 21:51:27Z

3

When you serialise any object, it will generally serialise everything in it. Otherwise that object hasn't really been serialised.

As Vash points out, those objects have to implement Serializable for this to work, or you get a NotSerializableException. Classes in the JDK already implement Serializable where it makes sense to do so.

answered Dec 19, 2012 at 21:51

Peter Lawrey

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Damian Leszczyński - Vash · Accepted Answer · 2012-12-19 21:58:31Z

1

No. You have to add the serialization interface to those objects to. Otherwise you will not be able to serialize the ArrayList.

edited Dec 19, 2012 at 21:58

answered Dec 19, 2012 at 21:51

Damian Leszczyński - Vash

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2 Comments

The Militant Hobo Over a year ago

I ask this question implying that the ArrayList objects implement serializable.

Damian Leszczyński - Vash Over a year ago

This is not obvious, but if it so then ArrayList should be serialized with success.

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