IOException java

Dev Zone Code
1

I’m having a difficulty with my code. When I use readObject in my code, I receive an IOException. The application as a whole works OK, but when I try to use readObject, I get an exception; here is the code I use to save objects:

File f = new File("employees.obj");
    ObjectOutputStream objOut = null;

    try {

        objOut = new ObjectOutputStream(new BufferedOutputStream(
                new FileOutputStream(f)));
        objOut.writeObject(newEmployee);
        objOut.flush();

        System.out.println("Object is serialized.");

    } catch (FileNotFoundException e) {
        System.out.println("File not found!");

    } catch (IOException e) {
        System.out.println("Failed!");

    } finally {

        if (objOut != null) {
            try {

                objOut.close();
            } catch (IOException e) {
            }
        }
    }

and here is the code I use to restore the object:

File f = new File("employees.obj");
    ObjectInputStream objIn = null;
    ArrayList<Employee> c = new ArrayList<Employee>();
    try {
        objIn = new ObjectInputStream(new BufferedInputStream(
                new FileInputStream(f)));
        while (objIn.readObject() != null) {
            Person employee = (Person) objIn.readObject();
            System.out.println("hello");
            System.out.println(employee.toString());
        }
        System.out.println(c.toString());
        return c;

    } catch (FileNotFoundException e) {
        System.out.println("1");
    } catch (IOException e) {
        e.printStackTrace();
    } catch (ClassNotFoundException e) {
        System.out.println("3");
    } catch (ClassCastException e) {
        System.out.println("4");
    } finally {

        if (objIn != null) {
            try {
                objIn.close();
            } catch (IOException e) {
                System.out.println("4");
            }
        }
    }
    return c;

and the output on the console:

at java.io.ObjectInputStream$BlockDataInputStream.peekByte(ObjectInputStream.java:2553)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1296)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350)
at org.bihe.DeSerializer.deSerializeEmployees(DeSerializer.java:20)
at org.bihe.Main.enterAsManager(Main.java:238)
at org.bihe.Main.menu(Main.java:92)
at org.bihe.Main.main(Main.java:50)

Any help would be appreciated

2

Your issue is at line 50. Which line is line 50?

3

Hello, sorry for the late response, and yes, I worked it out, so the exception is being thrown because I was attempting to read past the end of the file. As it reaches the end of the stream, the ObjectInputStream.readObject() function raises an EOFException, however it was not capturing this issue. I was instead catching the more generic IOException and not publishing any stack traces.

Thus, to resolve the issue, I modified the while loop to catch the EOFException and exit the loop when it is caught. I can also publish the stack trace for any other form of IOException to aid in the debugging of any other problems that may arise.