Hello,

I haven't worked with Serializable objects in Java before on my own, so I'm not sure what I'm doing wrong here in Processing.

I just want an easy way to save data, so I thought I'd just store the whole object. This is code ripped directly from one website I was looking at that gave examples:

 void saveData(){
   try{
     FileOutputStream f_out = new FileOutputStream("mydata.data");
     ObjectOutputStream obj_out = new ObjectOutputStream(f_out);
     obj_out.writeObject(myObject);
     obj_out.close();
     f_out.close();
   }
   catch(Exception e){
     println("Something went wrong(save): " + e);
   }
 }

When this gets run I get this message in the console:
java.io.NotSerializableException: sun.awt.image.ToolkitImage

But I noticed the file still appeared.

When I went to load it though with this code I got another error and nothing happened, the program didn't crash but it didn't have the effect I wanted it to either...

 void loadData(){
   try{
     FileInputStream f_in = new FileInputStream("mydata.data");
     ObjectInputStream obj_in = new ObjectInputStream(f_in);
     Object obj = obj_in.readObject();
     if(obj instanceof MyClass)
       myObject = (MyClass)obj;
   }
   catch(Exception e){
     println("Something went wrong(load): " + e);
   }
 }

java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: sun.awt.image.ToolkitImage

The MyClass file uses another class of my making which then uses another class of my making. I've made them all serializable. What do I need to do to fix this or is there some other way to go about writing my objects to files?