java serialization working unexpectedly?

Question

Hi If a class cannot implement serializable interface and if we try to serialize it, we should get a NotSerializableException. Here I am not getting it. The Cat class doesn't implement Serializable and I try to serialize it. Compiled and run fine why?

 import java.io.*;
 class Cat{}
 class MyTest{
 public static void main(String a[]){
    Cat c = new Cat();
    try{
        FileOutputStream fos = new FileOutputStream("test.ser");
        ObjectOutputStream oos = new ObjectOutputStream(fos);
        oos.writeObject(c);
        oos.close();
        fos.close();
    }
    catch(Exception e){e.getMessage();}
    try{
        FileInputStream fis = new FileInputStream("test.ser");
        ObjectInputStream ois = new ObjectInputStream(fis);
        c =  (Cat)ois.readObject();
        ois.close();
        fis.close();
    }
    catch(Exception e){e.getMessage();}
}
}

how do you know you are not getting error – Popgalop Sep 16 '13 at 20:29 — Popgalop, Sep 16 '13 at 20:29
Exactly. With that code, you can't know. – user207421 Sep 17 '13 at 01:56 — user207421, Sep 17 '13 at 01:56

score 5 · Accepted Answer · answered Sep 16 '13 at 20:29

5

It is throwing exceptions, you are just swallowing them with

catch(Exception e){e.getMessage();}

which just calls a method that returns a String, it doesn't log anything.

Use

e.printStackTrace();

answered Sep 16 '13 at 20:29

Sotirios Delimanolis

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Found this http://stackoverflow.com/questions/7469316/why-is-exception-printstacktrace-considered-bad-practice.... Is there any other way? – JNL Sep 16 '13 at 20:39
@JNL Of course. The methods of `Exception` give you all sorts of options: get the error message, get the stack trace, and you can override or add and use your own. – Sotirios Delimanolis Sep 16 '13 at 20:44

java serialization working unexpectedly?

1 Answers1