I'm trying to serialize a neural network,but I'm faced with the fact that I don't know how to do it. My code.
public class Layer implements Serializable {
private final int size;
private ThreadLocal<Vec> out = new ThreadLocal<>();
private Activation activation;
private Optimizer optimizer;
private Matrix weights;
private Vec bias;
private double l2 = 0;
private Layer precedingLayer;
But when serializing, I get the following exception - Exception in thread "main" java.io.NotSerializableException: java.lang.ThreadLocal How can I serialize my class?
Because a field in your Layer class does not implement Serializable, java does not know how to serialize an instance of Layer.
Specifically, as the exception message indicates, ThreadLocal<Vec> out is one such field that cannot be serialized, and if look at the class you'll see that it does not implement the Serializable interface.
ThreadLocal: https://docs.oracle.com/javase/7/docs/api/java/lang/ThreadLocal.html
Serializable: https://docs.oracle.com/javase/7/docs/api/java/io/Serializable.html
You could probably make a class like this that will compile:
import java.io.Serializable;
public class SerializableThreadLocal<T> extends ThreadLocal<T> implements Serializable {
}
Then instantiate an instance of SerializableThreadLocal when you start off, like this:
private ThreadLocal<Vec> out = new SerializableThreadLocal<Vec>();