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POWhere and when should I use the close() method to avoid IOException in ObjectInputStream?
 

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  1. POWhere and when should I use the close() method to avoid IOException in ObjectInputStream?
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    <p>I'm trying to read an object from client program over tcp. As you can see in this line I created objectInput:</p> <pre><code>ObjectInputStream objectInput = new ObjectInputStream(incoming.getInputStream()); </code></pre> <p>And then read my input from the other program. It used to work fine until i made minor changes to clean up the program. Personally Assume I added </p> <pre><code>objectInput.clsoe(); </code></pre> <p>My question is, After reading the object should I close the objectInputStream or Keep remain without close? Should I close it straight away after using it or at the end of if block or at the end of program? What are the effect of the close? By the way I have read the close documentation.</p> <p>Here is the error:</p> <pre><code>java.io.EOFException at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2280) at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2749) at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:779) at java.io.ObjectInputStream.&lt;init&gt;(ObjectInputStream.java:279) at Server.ClientWorker.run(MyCollectionServer.java:116) at java.lang.Thread.run(Thread.java:680) </code></pre> <p>Here is my code:</p> <pre><code> public static void main(String[] args) { ServerSocket serverSocket = null; try { serverSocket = new ServerSocket(port); } catch (IOException e) { e.printStackTrace(); } while(true) { ClientWorker w; try { w = new ClientWorker(serverSocket.accept()); Thread t = new Thread(w); t.start(); } catch(IOException e) { e.printStackTrace(); break; } } } } class ClientWorker implements Runnable { ..... private Socket incoming; public ClientWorker(Socket incoming) { myList = new ArrayList&lt;PureAlbum&gt;(); loadList(); this.incoming = incoming; } ..... public synchronized void run() { else if(request.compareTo("AddAlbum")==0) { try { ObjectInputStream objectInput = new ObjectInputStream(incoming.getInputStream()); //This is the line mentioned in the error PureAlbum object = (PureAlbum) objectInput.readObject(); if(object instanceof CDAlbum) { CDAlbum a = (CDAlbum) object; myList.add(a); System.out.println("Artist = " + a.getArtist()); } else if(object instanceof Client.au.edu.uow.Collection.DVDAlbum) { myList.add((DVDAlbum) object); } else { System.err.println("Warning : The object to add to database is unknown! "+ object.getClass() + "*"); System.exit(0); } } catch (UnknownHostException e) { System.err.println("Can not read the host name"); e.printStackTrace(); } catch (IOException e) { System.err.println("Can not read the FILE name"); //This exception has been called e.printStackTrace(); } catch (ClassNotFoundException e) { e.printStackTrace(); } } </code></pre>
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    1. USMike Pennington
    1. USBernard
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    1. COIf on Java 7, use Automatic Resource Management. If not, use a `finally` block to close.
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      1. POWhere and when should I use the close() method to avoid IOException in ObjectInputStream?
      1. USMarko Topolnik
 

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