ObjectInputStream.readobject() throws object in exception

Question

When i run the code below, the objIn.readObject(); throws a exception:

classNotFoundException project.Edge

The project.Edge is the object who i try to read from the file.

Object o = null;
ObjectInputStream objIn = null;
try {
    objIn = new ObjectInputStream(new FileInputStream("objects.dat"));
    o = objIn.readObject();
} catch (Exception ex) {
    ex.printStackTrace();
}
while (o != null) {
   //do stuff
}

The exception isn't strange, you should just call ex.printStackTrace() rather than System.out.println(ex.getMessage()); to see what it is. — biziclop
– biziclop, Commented May 17, 2016 at 9:34
readObject() only loads the data of a class, not the class itself. Therefore all classes used or referenced in objects.dat must be available in your project. — Robert
– Robert, Commented May 17, 2016 at 9:47

nikli · Accepted Answer · 2016-05-23 07:19:16Z

2

Maybe your project.Edge class not compiled correctly. Also check your classpath, this class must be available in your project.

edited May 23, 2016 at 7:19

answered May 17, 2016 at 9:44

nikli

2,3893 gold badges25 silver badges42 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

JP..t · Accepted Answer · 2016-05-17 09:53:13Z

0

When you have this problem, check if the project.Edge is in the same package as when you write the binary file.

answered May 17, 2016 at 9:53

JP..t

6151 gold badge10 silver badges28 bronze badges

Collectives™ on Stack Overflow

ObjectInputStream.readobject() throws object in exception

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related