Question

public class PersistentAnimation implements Serializable, Runnable
         {
         private Thread animator;
         private int animationSpeed;
         public PersistentAnimation(int animationSpeed)
        {
         this.animationSpeed = animationSpeed;
        animator = new Thread(this);
           }
               public void run()
          {
             while(true)
            {
               // do animation here
         }

Here animator is not marked as transient? Will it still be persisted?

Answer 1

No, because Thread does not implement the Serializable interface. You’ll have an exception when trying to serialize an instance of this class.

Straight from the javadoc of Serializable:

When traversing a graph, an object may be encountered that does not
support the Serializable interface. In this case the
NotSerializableException will be thrown and will identify the class of
the non-serializable object.