I have this exception and I don&#39;t understand why it would be thrown or, how I  should handle it.

        

    try {
        os.writeObject(element);
    } catch (IOException e) {
    	e.printStackTrace();
    }

Where `element` is a `TransformGroup` containing some other `TransformGroups` an instance of the class Atom:


    public class Atom extends Group implements Serializable{
    	float pozX,pozY;
    	Group group= new Group();	
    	Color3f blue = new Color3f(new Color(255));
    	Color3f black = new Color3f(new Color(0));
    	Sphere AtSph=new Sphere();
    	
    	public Atom(final float WEIGHT, final int BOUNDS,final float radius,Color3f color)
    	{
    		AppSetting ap= new AppSetting(color, black);
    		AtSph=new Sphere(radius,1,100,ap);
    	}
    }

The full error log:

    java.io.NotSerializableException: javax.media.j3d.TransformGroup
    	at java.io.ObjectOutputStream.writeObject0(Unknown Source)
    	at java.io.ObjectOutputStream.writeObject(Unknown Source)
    	at cls.MolecularBuilder.addAtom(MolecularBuilder.java:511)
    	at cls.MolecularBuilder$Console.HidrogenItemActionPerformed(MolecularBuilder.java:897)
    	at cls.MolecularBuilder$Console$2.actionPerformed(MolecularBuilder.java:746)
    	at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
    	at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
    	at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
    	at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
    	at javax.swing.AbstractButton.doClick(Unknown Source)
    	at javax.swing.plaf.basic.BasicMenuItemUI.doClick(Unknown Source)
    	at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(Unknown Source)
    	at java.awt.Component.processMouseEvent(Unknown Source)
    	at javax.swing.JComponent.processMouseEvent(Unknown Source)
    	at java.awt.Component.processEvent(Unknown Source)
    	at java.awt.Container.processEvent(Unknown Source)
    	at java.awt.Component.dispatchEventImpl(Unknown Source)
    	at java.awt.Container.dispatchEventImpl(Unknown Source)
    	at java.awt.Component.dispatchEvent(Unknown Source)
    	at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
    	at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
    	at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
    	at java.awt.Container.dispatchEventImpl(Unknown Source)
    	at java.awt.Window.dispatchEventImpl(Unknown Source)
    	at java.awt.Component.dispatchEvent(Unknown Source)
    	at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
    	at java.awt.EventQueue.access$200(Unknown Source)
    	at java.awt.EventQueue$3.run(Unknown Source)
    	at java.awt.EventQueue$3.run(Unknown Source)
    	at java.security.AccessController.doPrivileged(Native Method)
    	at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
    	at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
    	at java.awt.EventQueue$4.run(Unknown Source)
    	at java.awt.EventQueue$4.run(Unknown Source)
    	at java.security.AccessController.doPrivileged(Native Method)
    	at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
    	at java.awt.EventQueue.dispatchEvent(Unknown Source)
    	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
    	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
    	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
    	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    	at java.awt.EventDispatchThread.run(Unknown Source)

`AppSetting` (in Atom class) is just a custom class that extends Appearance.

All Notserializableexception Solutions on Gang of Coders

Total of 1 Notserializableexception Solutions

Why does writeObject throw java.io.NotSerializableException and how do I fix it?