👀 Views: 0 💬 Answers: 1 📅 Created: 2025-06-12

java serialization classcastexception Java

I'm dealing with I'm working with a `ClassCastException` when trying to deserialize an object that I've serialized using a custom `ObjectOutputStream`. The scenario arises specifically when I attempt to cast the deserialized object back to its original type. My class looks like this: ```java import java.io.*; public class MyCustomObject implements Serializable { private String name; public MyCustomObject(String name) { this.name = name; } public String getName() { return name; } } ``` When I serialize an instance of `MyCustomObject`: ```java try (ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream("myObject.ser"))) { MyCustomObject obj = new MyCustomObject("Test"); out.writeObject(obj); } ``` And when I try to deserialize it: ```java try (ObjectInputStream in = new ObjectInputStream(new FileInputStream("myObject.ser"))) { Object obj = in.readObject(); MyCustomObject myObj = (MyCustomObject) obj; // ClassCastException occurs here } ``` I get the following behavior message: ``` Exception in thread "main" java.lang.ClassCastException: class java.lang.Object want to be cast to class MyCustomObject ``` I’ve checked the classpath to ensure that the `MyCustomObject` class is available during deserialization. I’m using Java 17, and I’ve also verified that the serialVersionUID is not explicitly defined, but since it’s the same class and hasn’t changed, I believe it should be fine. I’ve tried cleaning and rebuilding my project, but the scenario continues. Is there something I'm missing in the serialization/deserialization process, or could it be related to the way I'm handling the classloader? Any insights would be greatly appreciated!