CODEWITHSUNDEEP
javaserializationcasting
saleem
saleem

Reputation: 47

Should I cast an object after loading it from serialized form?

I am loading an object from serialized form: 

private void loadSerialisedIntersection() throws IOException{
 try{   
 FileInputStream f_in = new FileInputStream(getPath());

        obj_in = new ObjectInputStream (f_in);

        obj = obj_in.readObject();

        if(!(obj instanceof Intersection)) { 
        throw new IOException("Wrong class");
         }
  }
 catch (ClassNotFoundException e) {
       e.printStackTrace();
    }
 }

I was wondering if it is a good idea to cast to the type of object I am expecting? I have seen this recommended but I can only imagine it would cause issues. If this is the right thing to do could you please explain why?

Thanks

Upvotes: 0

Views: 72

Answers (1)

Matija Gobec
Matija Gobec

Reputation: 880

You should cast it to the expected type because that is the point of typed languages. You are already checking if that object is a correct instance type. When you finish with ObjectInputStream close it and make obj_in and obj a scope variable not a field (I'm assuming this).

Upvotes: 2

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