Re: comp.lang.java.gui

From:

"Steve W. Jackson" <stevewjackson@knology.net>

Newsgroups:

comp.lang.java.programmer

Date:

Fri, 06 Oct 2006 14:17:33 -0500

Message-ID:

<stevewjackson-47B670.14173206102006@individual.net>

In article <1160157978.164496.294940@k70g2000cwa.googlegroups.com>,
bg_ie@yahoo.com wrote:

Hi, the following code is giving the error -

unreported exception java.lang.ClassNotFoundException; must be caught
or declared to be thrown

what is the problem with my code?

Thanks,

Barry.

try
  {
    ObjectInputStream in = new ObjectInputStream(new
FileInputStream("words.dat"));

  // try
  // {
      String s = (String)in.readObject();
  // }
  // catch(StreamCorruptedException sce)
  // {
  // System.out.println("Skipping");
  // }

    in.close();
  }
  catch(IOException e)
  {
    System.out.println("Error reading the specified file.");
  }

The first problem is the subject of your post...it has no bearing on
your question.

The error in question is a compiler error and should be obvious. It's
saying your code calls a method which throws the ClassNotFoundException.
When that's the case, you're required to either have a catch block for
that exception (or a superclass), or the method must have a "throws"
clause indicating it throws ClassNotFoundException.

The code snippet you provided isn't complete on its own, but in that
brief bit there's one obvious source of this exception. Visit the Java
API and you'll find that ObjectInputStream's readobject() method states
that it throws IOException and ClassNotFoundException. So the call in
your code must handle those two exceptions.
--
Steve W. Jackson
Montgomery, Alabama