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| Chapter 24 The java.io Package |

## 24.37 java.io.NotSerializableException (JDK 1.1)

###

This exception signals that an object could not be serialized. It is thrown when serialization is attempted on an instance of a class that does not implement the `Serializable` interface. Note that it is also thrown when an attempt is made to serialize a `Serializable` object that refers to (or "contains") an object that is not `Serializable`.

A subclass of a class that is `Serializable` can prevent itself from being serialized by throwing this exception from its `writeObject()` and/or `readObject()` methods.

    public class NotSerializableException extends ObjectStreamException {
        // Public Constructors
                public NotSerializableException(String classname);
                public NotSerializableException();
    }

### Hierarchy:

Object->Throwable(Serializable)->Exception->IOException->ObjectStreamException->NotSerializableException

java.io.NotActiveException (JDK 1.1) |  | java.io.ObjectInput (JDK 1.1)