JFrame 的序列化移除了 JButton 的 ActionListener - Java

Question

I'm relatively new to serialization, so I created a test application to mess around with it. I serialized a JFrame which had 3 added JComponents : a JTextArea and two JButtons . One button saved the JFrame 's state (ie serialization) and the other loaded the serialized JFrame (ie deserialization).

When I typed a message in the JTextArea , clicked the button to save the state, and then loaded the JFrame from the SER file, I got the exact same object (typed message and all) except that the buttons no longer worked.

Would someone mind explaining why this behaved the way it did?

PS I know that it's generally not a good practice to serialize GUI components, but this is for learning purposes only.

Answer 1

我让实现ActionListener的类也实现了Serializable ，这解决了这个问题。

Answer 2

Yes that would definitely help ie making the class implementing ActionListener implement Serializable. The question here is why does the process not throw a NotSerializableException, seeing the component has an event listener which is not serializable.Why does the listener be simply excluded from serialization rather than an Exception being thrown. Also, what should I do if Im using lambda expressions for implementing ActionListener? Please help😭