Need Help With: java.io StreamCorruptedException invalid stream header

All:
1. For some time I have tried to correct an error: "java.io StreamCorruptedException invalid stream header" , reoccuring in Jasper Reports source code.
2. Based upon requirements, The Program packages variables into a HashMap, and creates a "BLOB" object which is inserted into an Oracle database. At a later point, the BLOB object is retrieved, and the "BLOB" contents are read into a byte array. The next occurring task is to retrieve data from the receiving byte array and reconstitute the original HashMap object.
THIS IS WHEN THE PROGRAM FAILS !!!!!
3. I can verify the number of bytes going in/out of the "BLOB" object as being the same count. I have tried different approaches listed on diverse sites w/o success. My Source Code Follows:
// I tried to include only germane source code.
// THIS SECTION GETS THE BLOB OBJECT AND PUTS IT INTO A BYTE //ARRAY
rs = ps.executeQuery();
if (rs.next())
BLOB myblob =((OracleResultSet)rs).getBLOB("JASPERDATA");
int chunkSize = myblob.getChunkSize();
System.out.println("Incomming DATA size is ........." + chunkSize);
textbuffer = new byte[chunkSize];
int bytesRead;
InputStream myis = myblob.getBinaryStream();
OutputStream myout = myblob.getBinaryOutputStream();
while((bytesRead = myis.read(textbuffer) )!= -1)
myout.write(textbuffer);
myout.flush();
"" //code not germane to Discussion
          return (textbuffer); //Returns Byte Array
// I tried to include only germane source code.
byte [] textbuffer = adb.getBLOBFromQueue(dataFile); // Get Byte Array from above.
int textbufferLength = textbuffer.length;
          HashMap localParamValueMap = null;
          Object in = new ObjectInputStream(new ByteArrayInputStream(textbuffer ));
          localParamValueMap = (HashMap) ((ObjectInputStream) in).readObject(); // THIS IS THE PROBLEM AREA EXCEPTION OCCURS AT "readObject"
// ERROR RECEIVED IN TOMCAT
//ERROR CALLSTACK
java.io.StreamCorruptedException: invalid stream header
     at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:737)
     at java.io.ObjectInputStream.<init>(ObjectInputStream.java:253)
     at com.entservlet.DisplayJasperReports.doGet(DisplayJasperReports.java:72)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
     at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2422)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
     at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
     at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:163)

Be sure that you are not seeing a secondary problem.
In my case, with serialized objects back to the client, the client will see this expection when any of the following occurs:
1) The server has timed out the session and instead of sending back an object, the object stream is seeing the login page.
2) An error is occured somewhere inside of the jsp code and instead of getting a the expected serailized object in the stream, I'm getting the 500 status page...
So...
In your case you are going from one server to tomcat but I wouldn't be surprised if something similar is going on.
-Dennis

Similar Messages

Java.io.StreamCorruptedException: invalid stream header

I am having a problem with sending two objects (over a socket). I have read in other posts that this could be due to trying to receive incompatible data types but my applications work fine if I send my objects synchronously rather than asynchronously.
I will try my best to describe what my problem is as my code is very long.
I have a server and a client application (2 apps). Multiple clients connect to the server and send their details (as an object) to the server. The server then amends the object (adds some more data) and sends it back to the clients. Both the SendObject and ReceiveObject class are threads and I have created a Listener (within the client) that activates when an object is received (asynchronous communication). The Listener method looks to see if the event is an instance of a particular class and casts is as appropriate (as per below).
public void receivedObject(ReceivedObjectEvent e) {
     ReceiveObjectThread obj = (ReceiveObjectThread) e.getObject();
     if(obj.getObject() instanceof Player) {
          thePlayer = (Player) obj.getObject();
          theTable.setHandData(thePlayer.getHand());
     if(obj.getObject() instanceof GameData) {
          gameData = (GameData) obj.getObject();
          theTable.setPlayerList(gameData.getOpponents());
}The objects that are passed between applications both implement Serializable.
This all works fine synchronously object passing. However, if I try and spawn two sendObject threads within the server and the corresponding two receive threads within the client and wait for the Listener to activate (asynchronously) I get the following error:
java.io.StreamCorruptedException: invalid stream header: 00057372
     at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:783)
     at java.io.ObjectInputStream.<init>(ObjectInputStream.java:280)
     at ReceiveObjectThread.run(ReceiveObjectThread.java:84)
java.io.StreamCorruptedException: invalid stream header: ACED0006
     at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:783)
     at java.io.ObjectInputStream.<init>(ObjectInputStream.java:280)
     at ReceiveObjectThread.run(ReceiveObjectThread.java:84)
I am sure that this problem is due to my limited knowledge on socket and data transfer. Therefore any help on this one will be gratefully received.

Hello ejp, your reply is very much appreciated.
If I explain how I have implemented my sockets you may be able to see where I wrong.
When a player connects, the client sends the server a �player� object. The server receives the �player� object and passes the socket from which it connected (within the server) to a socket property within the �player� class. Whenever the server needs to send an object to that client (player), it sends the output stream from the socket property within that �player� object. ( player.getSocket().getOutputStream() ).
Below is the code from the �SendObjectThread� class.
* This class allows an object to be passed over a Socket
* @author Harold Clements
* @version 1.0.1 12-Jun-2007 (12-Jul-2007)
//http://www.seasite.niu.edu/cs580java/Object_Serialization.html
public class SendObjectThread extends Thread {
     private OutputStream out;
     private Object obj;
      * This constructor allows the user to passes the two parameters for transmitting.
      * @param out The data stream that the object is going to be sent to.
      * @param obj The object to be sent.
     public SendObjectThread(OutputStream out, Object obj) {
          this.out = out;
          this.obj = obj;
      * The main thread
     public void run() {
          try {
               ObjectOutputStream objOut = new ObjectOutputStream(out);
               objOut.writeObject(obj);
               objOut.flush();
          } catch (IOException e) {
               e.printStackTrace();
}The client only has one socket which is defined when the client first makes a connection with the server. The �getOutputStream()� and �getInputStream()� are used for all communication from the client.
Is this what you described in your first option?
The funny thing about it all is if I create a new �receiveObjectTread� and wait for that to finish, then create another �receiveObjectTread� both objects in question (Player and GameData) are received correctly and the application works. I only have the problem when I set both threads off and leave it for the �ReceivedObjectEvent� listener to pick them up and cast them (as per my first post).
Thanks again for your help,
Harold Clements

Getting "java.io.StreamCorruptedException: invalid stream header"

When creating a self made Stream (MacInputStream) and then using an ObjectInputStream over it to read Objects from a socket, I get this error:
java.io.StreamCorruptedException: invalid stream header
     at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:764)
     at java.io.ObjectInputStream.<init>(ObjectInputStream.java:277)
     at TServidor.run(TServidor.java:32)
Is there any special feature that the "self-made" streams have to implement to be possible to use ObjectInput streams over them :P ?
Here is the MacInputStream.java code:
import java.io.Closeable;
import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;
import javax.crypto.Mac;
public class MacInputStream extends FilterInputStream implements Closeable{
     private Mac mac; // algorithm
     private byte [] mmac; //message MAC
     private boolean FIRST_TIME;
     public MacInputStream(InputStream is,Mac mac) {
          super(is);
          this.mac=mac;
          FIRST_TIME=true;
public int read() throws IOException{
          if(FIRST_TIME){
               mmac = new byte [mac.getMacLength()];
               super.read(mmac);
          if(super.in.available()==0){
               FIRST_TIME=true;
               return -1;
          int rbyte = super.in.read();
          FIRST_TIME=false;
          mac.update((byte)rbyte);
          System.out.println("available: "+super.in.available());
          if(super.in.available()==0){
               byte [] macres =mac.doFinal();
               System.out.println("message MAC: "+new String(mmac));
               System.out.println("calculated MAC: "+new String(macres));
               if(!Arrays.equals(macres, mmac)){
                    throw new IOException("violated integrity");
          return rbyte;
public int read(byte [] b) throws IOException{
     if(FIRST_TIME){
          mmac = new byte [mac.getMacLength()];
          super.in.read(mmac);
     if(super.available()==0){
          FIRST_TIME=true;
          return -1;
     int rbytes = super.in.read(b);
     FIRST_TIME=false;
     mac.update(b);
     if(super.available()==0){
          byte [] macres =mac.doFinal();
          if(!Arrays.equals(macres, mmac)){
               throw new IOException("violated integrity");
     return rbytes;
}And here is the "main" function where the exception gets thrown:
public void run() {
     try {
          ObjectOutputStream oos = new ObjectOutputStream(s.getOutputStream());
          Mac mac = Mac.getInstance("HmacMD5");
          Key key = KeyGenerator.getInstance("HmacMD5").generateKey();
          oos.writeObject(key);
          oos.flush();
          mac.init(key);
          ObjectInputStream cis = new ObjectInputStream(new MacInputStream(s.getInputStream(),mac));
         String test;
         try {
               while (true) {
                    test = (String)cis.readObject();
                    System.out.println(ct + " : " + test);
          } catch (EOFException e) {
               System.out.println("["+ct + "]");
          } finally {
          if (cis!=null) cis.close();
          if (oos!=null) oos.close();
     } catch (Exception e) {
         e.printStackTrace();
    }It's exactly in the line: ObjectInputStream cis = new ObjectInputStream(new MacInputStream(s.getInputStream(),mac));Any ideas?
I'm starting to desperate :P

(a) I still don't see where you are writing the MAC that you're reading. You're reading something, but it's all or part of the Object stream header I described above, which is why ObjectInputStream' constructor is throwing that exception.
(b) You don't need to override read(byte[] b) when you extend FilterInputStream, but you do need to override read(byte[] b, int offset, int length), and you need to do it like this:
public int read(byte[] buffer, int offset, int length) throws IOException
int count = 0;
do
    int c = read();
    if (c < 0)
        break;
    buffer[offset+count++] = (byte)c;
} while (count < length && available() > 0);
return count > 0 ? count : -1;
}This way the read() method gets to see every byte that's read and to do its MAC thing or whatever it does. The above is one of only two correct uses of available() in existence: it ensures that you only block once while reading, which is the correct behaviour e.g. on a network.

Problem with StreamCorruptedException: invalid stream header: 3C68746D

Hi
I am attempting to code a project in Java which involves the user of object serialization to send a String via serialization from an applet embedded in a JSP tp a servlet all files are running on the same machine for testing purposes.
However I seem to be getting StreamCorruptedException: invalid stream header: 3C68746D whenever I attempt to read the inputstream once I have written to it.
My code is as follows below (I apologise for the lack of details I have attempted to comment and simplify my code as much as possible for improved readability)
////////////////////////APPLET CODE////////////////
import java.io.*;
import java.io.Serializable;
import javax.servlet.http.*;
import java.applet.*;
import javax.swing.*;
import java.net.*;
*Compiled using netbeans 5.1
*Uses Apache server embedded with netbeans
*JSP address http://localhost:8084/TestServ
*Applet is embedded within this page
*Servlet address http://localhost:8084/TestServ/TServ
public class Main extends javax.swing.JApplet {
JFrame jf;//frame for the test applet
JTextArea jt;//result text box
public Main() {
jt=new JTextArea();//set up applet
this.add(jt);
URL servletURL;
HttpURLConnection servletConnection;
InputStream iStream=null;
try
{ //this address as far as is known is correct
servletURL = new URL( "http://localhost:8084/TestServ/TServ" );
//open connection to servlet
servletConnection = (HttpURLConnection)servletURL.openConnection();
//set up connection
servletConnection.setDoInput(true);
servletConnection.setDoOutput(true);
servletConnection.setUseCaches(false);
servletConnection.setDefaultUseCaches(false);
//have tried "GET" and "POST" and "PUT"(PUT not directly compatible with apache servers)
servletConnection.setRequestMethod("POST");
servletConnection.setRequestProperty("Content-type","application/octet-stream");
/*Have also tried application/x-java-serialized-object*/
//set object output stream
ObjectOutputStream outStream =
new ObjectOutputStream(servletConnection.getOutputStream());
//write a string for test purposes (As far as I am aware String implements Serializable)
outStream.writeObject("h");
//flush and close connection
//have tried a combination of flush and/or close
outStream.flush();
outStream.close();
//get input stream rdy for objectinput stream
iStream = servletConnection.getInputStream();
catch(IOException e)
jt.setText("Error in output "+e);
ObjectInputStream oInStream=null;
String str = iStream.toString();
//iStream at this point equals ""sun.net.www.protocol.http.HttpURLConnection$HttpInputStream@6754d6
try
//this is where the error occurs
//upon even trying to create a objectinputstream using iStream IOException occurs
oInStream = new ObjectInputStream(iStream);
//program does not get any further
oInStream.close();
catch(IOException e)
//this error has been driving me crazy :(
jt.setText("Error in input "+e);
Servlet code is below however it does not even reach this point
(If reading input stream is removed from the applet the servlet provides the same error message)
/////////////////////Servlet code (however does not reach this point)///////////////
import java.io.*;
import java.net.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class TServ extends HttpServlet {
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
ObjectInputStream inputFromApplet = null;
InputStream in = request.getInputStream();
BufferedReader inTest = null;
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet TServ</title>");
out.println("</head>");
out.println("<body>");
try
inputFromApplet = new ObjectInputStream(in);
out.println("<h2>Sucess </h1>");
catch(EOFException e)
out.println("<h3>ERROR: " e " Error</h3>");
out.println("<h3>End Servlet</h3>");
out.println("</body>");
out.println("</html>");
out.close();
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
public String getServletInfo() {
return "Short description";
Thank you for your time I have searched for an answer for some time now and how found people in similar situations however no solution has been found
Any help is appreciated
Az

The servlet isn't writing any objects back in reply. It is writing text. Not the same thing. If you want to read using an ObjectInputStream you have to write using an ObjectOutputStream.

Need help with java will even pay

I need extreme help. I just don't have time lately to write these programs and I have fallen extremely behind. Basically all I need is to pass this class and right now until I can get some more help I just can't make the deadlines. If someone could help me I will pay you just like a tutor.
Requirements for Lab.
You will need to develop a variety of classes for this lab. Specifically, you need to create:
+1. a "PersonGUI" class that displays fields for a person's: firstName, lastName, identificationNum, and sex.+
+2. a "StudentGUI" class that provides Java components for the entry of: classification (freshman, sophomore, junior, senior, or graduate student), and Checkboxes for (a student being in the Honor's program and/or in the ROTC).+
+3. a "FacultyGUI" class that provides Java components for the entry of: rank (instructor, assistant, associate, or full professor), years of service, and salary.+
+4. a "Statistics" class that, when instantiated, creates an object containing an instance variable for each of the the statistical values outlined below. (Each of these instance variables should be declared to be "private".)+
Your main Lab6 class should provide a means for the user to:
+1. Specify the kind of personal data to be entered (Student or Faculty), and+
+2. Then, depending on the choice made, appropriate fields should be displayed to allow the user to input appropriate information for the type of personal data being entered, and+
+3. Controls that support the following functionality:+
* a "CANCEL" control that will terminate any operation currently being performed and return the user to the "Startup" window.
* a "SAVE" control that will cause the just entered data to be harvested from the graphical user interface and the appropriate statistics to be updated. Note: this function may NOT be performed if any of the student or faculty member data fields have not been filled in.
* a "RESET" control that will erase all information recorded to date (i.e., all summary variables are reset to zero).
* a "CLEAR" control that will erase all fields for the personal data currently being entered.
* and a "DISPLAY TOTALS" control that will display, when pressed, the following data:
+1. For students:+
+1. total number of students entered so far,+
+2. number who are male and number who are female,+
+3. number of freshmen, sophomores, juniors, seniors, and graduate students,+
+4. number of students who are in the Honor's program and number who are in the ROTC.+
+2. For faculty:+
+1. total number of faculty entered so far,+
+2. number who are male and number who are female,+
+3. the name and salary of the highest paid faculty member on campus.+
Your program should validate numeric data to the extent:
+1. no numeric field (id number, years of service, or salary) may be left blank by the user. If done so, the user should be alerted to enter a numeric value.+
+2. when the user enters a "years of service" value for a faculty member - the value entered should be verified to be a valid integer value in the range 1 to 50. If the data entered is outside the valid range or is not a valid integer - your program should reject the value and prompt the user that invalid data has been entered and that a new value is necessary.+
+3. when a faculty salary is entered, verify that it is a floating-point value in the range $35,000 to $200,000. Handle invalid data as described above.+
+4. Similarly, if an invalid integer value is entered for the identification number, the value should be rejected and the user prompted to reenter.+
+5. Information should not be saved, nor should statistical values be updated, until all numeric data has been validated.+
Note -- You will be graded on appropriate use of instance vs. local variables, use of methods, and passing parameters and returning appropriate values.
+1. The 'Statistics" class MUST provide "mutator" and "accessor" methods that are required to access values or to modify the values of any variable. REMEMBER ALL VARIABLES ARE DECLARED TO BE "private"!!+
+2. You should implement methods to verify the data, as detailed above. The methods should return boolean values indicating whether the data is acceptable or not.+

Sorry to hear about your problems - lack of time, having fallen behind, imminent failure etc - but none of these are Java problems.
This site deals with Java problems: compiler or runtime behaviour that people can't understand. If you have problems of that sort (and especially if solving those problems would help with the problems you did describe) then post them.
Otherwise you would seem to be in the wrong place.

Need help with java

ok so i have a midterm and need help this question that is gonna be on the midterm. i dont know how to do it and its worth 16 marks!!!! here it is
the UW Orchestra wants to produce a CD containing all the pieces of music
from its upcoming concert. In order to do that, it needs to calculate the total length of time for the
CD. In addition, the conductor wishes to know which piece of music has the longest duration.
Sample output for the program.
The Swan (3.88)
The Bee (0.98)
Claire de Lune (6.02)
Liebesfreund (3.38)
Ragtime (3.48)
The total time for the CD is 18.74 minutes.
The longest piece is Claire de Lune.
Do not include the HTML that is required to embed the program into a Web page (that is, show
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time.
Use reasonable variable names, indentation and good programming style. Documentation and
comments are not required, but you may add them to explain any assumptions you might want to
make. You need not check that the input is valid, and you may assume that no two pieces have the
same duration.
can anyone help me out! i would be indebt of ur kindness if u can help me out!

This forum is for Java, not JavaScript. The two have nothing to do with each other.
And anyway, this is your studying, so you should try to do it, put forth your best effort, and ask specific questions (on the proper fourm).

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Go here http://www.java.com/en/ and click "Download Now".
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I go to certain websites and I get this error with firefox.
This Site requires that JavaScript be enabled.
It is enabled.
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Error: [Exception... "'Component does not have requested interface' when calling method: [nsIInterfaceRequestor::getInterface]" nsresult: "0x80004002 (NS_NOINTERFACE)" location: "<unknown>" data: no]
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Hi 49ers,
Sorry not to have any real idea of how to help you out here, but this is a Java forum, not JavaScript.
Some Firefox expert may stumble across your post and be able to offer some advice (I hope they do) but this isn't really the best place to post such questions.
Try here: http://www.webdeveloper.com/forum/forumdisplay.php?s=&forumid=3
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A while back I thought I had updated my Java Runtime Environment programming. But I now apparently have two programs installed, perhaps through my not handling the installation properly. Those are:
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and:
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Or, should I just leave it alone, and not worry about it?
Yeah, I don't have much in the way of technical knowledge...
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Thanks for the feedback. I think I'll do just that. Once in a while I have a problem with Java not bringing up a webcam shot, but when that happens, it seems to be more website based than a general condition.

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This forum is dedicated to Sun's Java Desktop System, an alternative desktop operating environment. Try reposting here:
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I need help creating custom Java Script so I can get the desired answer.
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2) There is a total field set up to sum the answers from all above questions
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Have you tried the "The field is the average of:"?

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Hi @ all out there,
I'm new with Java RMI and have to write a EventSystem for an college project where clients can subscribe to a topic and get notified when someone publishes a message to the subscribed topic.
At server-side I have a class called EventSystem that provides methods for subscribing and unsubscribing from topics, and also for posting messages (for publishers).
To subscribe i thought that the client must specify the topic and also itself ( means that a client calls in this way: obj.subscribe("mytopic", this).
The EventSystem handles a list of all clients, and whenever a new message is posted it goes trough all clients and invokes the handleMessage(String msg) method that all Clients have to provide.
On my local machine without RMi this concept works just great.
I now tried to get it working using RMI , but I get the following Exception when starting the client (the server starts fine) :
Looking up for rmiregistry at 138.232.248.22:1099
Subscriber exception:
java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
        java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
        java.io.InvalidClassException: SubscriberImpl; SubscriberImpl; class invalid for deserialization
        at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:336)
        at sun.rmi.transport.Transport$1.run(Transport.java:159)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
        at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535)
        at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790)
        at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
        at java.lang.Thread.run(Thread.java:619)
        at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:255)
        at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:233)
        at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:142)
        at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:178)
        at java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:132)
        at $Proxy0.subscribe(Unknown Source)
        at SubscriberImpl.main(SubscriberImpl.java:48)
Caused by: java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
        java.io.InvalidClassException: SubscriberImpl; SubscriberImpl; class invalid for deserialization
        at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:293)
        at sun.rmi.transport.Transport$1.run(Transport.java:159)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
        at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535)
        at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790)
        at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
        at java.lang.Thread.run(Thread.java:619)
Caused by: java.io.InvalidClassException: SubscriberImpl; SubscriberImpl; class invalid for deserialization
        at java.io.ObjectStreamClass.checkDeserialize(ObjectStreamClass.java:713)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1733)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
        at sun.rmi.server.UnicastRef.unmarshalValue(UnicastRef.java:306)
        at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:290)
        ... 9 more
Caused by: java.io.InvalidClassException: SubscriberImpl; class invalid for deserialization
        at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:587)
        at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1583)
        at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1496)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1732)
        ... 13 moreI googled now for 2 hours but can't resolve the problem alone. As far as I can understand I have to serialize Objects that I want to send to the server, right?
So how can i do this? I've never used serialization till now.
any ideas how to solve this problem?
greets from italy and sorry for my very weak english
bd_italy

A class has been modified after deployment. Stop the Registry, clean, recompile, and redeploy.

Need help with Java fonts (broken in 10.4.9)

Hi, folks,
There was a post late last year (maybe October?) that explained how to fix a problem with Java fonts. (OK...I know NOTHING, but I am able to follow directions!)
I play games on Yahoo.com (Literati and Word Racer) that now have unreadable fonts since I upgraded 3 days ago. I seem to remember last year's fix had something to do with disabling fonts. I just can't remember what to do and have spent an hour looking for the post.
If you can find it - or tell me what to do - I'd appreciate it. Remember, I need really specific directions.
Thanks.
iMac duo core Mac OS X (10.4.9)

I am able to set up a new account and work but even after deleting all preferences the problem persists in my admin account.
I'll try to look for any font corruption and clear font cache but having to reinstall the OS is a real drag. Not sure why PS should corrupt the OS, itself.
Any chance I can uninstall and remove PS then install again?

Need Help with Java Homework

This is my first post here, seeking some help with my java homework. I am required to create a program to write out a receipt for a pizza company: name of company, total number of pizzas, costs (including tax etc), and print out the receipt after taking an order from the customer.
This is a beginner's java class and my book isn't very good at explaining (mainly because it says "will be discussed in ch 14" when we're in ch 1-3 and it's an essential part of the program).
But anyways, if anyone is up right now, would be helpful for some help. I have a general idea of what I wanna do, but the program so far is very messy and incomplete and having trouble getting it to look nice and proper.

well there were two ways of doing this, im only 2 weeks new in java so bear with me.....I was gonna set 3 classes, one appclass, one order form, and one receipt. I was told you can combine the order and receipt in 1 class, but I thought doing 3 woudl be better to help me learn more...anyways, I haven't worked on the appclass yet, but for the order I have a very messy set of codes. I know that it's wrong but it's a start, im looking for any input cause the book does not explain very much.
For the order class, I will be doing showinputdialog boxes for how many pizzas, the sizes, and the toppings. Here is what I have so far ( i know it is VERY messy and disorganized but I am a bit lost in where I should go next):
* @author AlexNguyen
* To take the order with number of pizzas and toppings
package project2;
import javax.swing.JOptionPane;
public class Order {
     public int NumberOfPizzas;
     public char Pepperoni;
     public char Sausage;
     public char Cheese;
     public Order(int n) {
     NumberOfPizzas = n;
     JOptionPane.showInputDialog("Enter Number of Pizzas"));
String ptype; {
     public void start();
     public void takeOrder();
     public void writeReceipt();
          public void takeOrder();
          ptype = Topping
public String selectPizza(char P, char S, char C) {
     Pepperoni = P;
     Sausage = S;
     Cheese = C;
public void numPizza(int numberOfPizzas) {
     num = numberOfPizzas;
JOptionPane.showInputDialog("Topping for Pizza?");
JOptionPane.showInputDialog("Pizza Size?");
JOptionPane.showInputDialog("Number of Pizzas?");
}

Need help with Java app for user input 5 numbers, remove dups, etc.

I'm new to Java (only a few weeks under my belt) and struggling with an application. The project is to write an app that inputs 5 numbers between 10 and 100, not allowing duplicates, and displaying each correct number entered, using the smallest possible array to solve the problem. Output example:
Please enter a number: 45
Number stored.
45
Please enter a number: 54
Number stored.
45 54
Please enter a number: 33
Number stored.
45 54 33
etc.
I've been working on this project for days, re-read the book chapter multiple times (unfortunately, the book doesn't have this type of problem as an example to steer you in the relatively general direction) and am proud that I've gotten this far. My problems are 1) I can only get one item number to input rather than a running list of the 5 values, 2) I can't figure out how to check for duplicate numbers. Any help is appreciated.
My code is as follows:
import java.util.Scanner; // program uses class Scanner
public class Array
     public static void main( String args[] )
      // create Scanner to obtain input from command window
          Scanner input = new Scanner( System.in);
      // declare variables
         int array[] = new int[ 5 ]; // declare array named array
         int inputNumbers = 0; // numbers entered
      while( inputNumbers < array.length )
          // prompt for user to input a number
            System.out.print( "Please enter a number: " );
                  int numberInput = input.nextInt();
          // validate the input
             if (numberInput >=10 && numberInput <=100)
                   System.out.println("Number stored.");
                 else
                   System.out.println("Invalid number. Please enter a number within range.");
          // checks to see if this number already exists
                boolean number = false;
          // display array values
          for ( int counter = 0; counter < array.length; counter++ )
             array[ counter ] = numberInput;
          // display array values
             System.out.printf( "%d\n", array[ inputNumbers ] );
               // increment number of entered numbers
            inputNumbers++;
} // end close Array

Yikes, there is a much better way to go about this that is probably within what you have already learned, but since you are a student and this is how you started, let's just concentrate on fixing what you got.
First, as already noted by another poster, your formatting is really bad. Formatting is really important because it makes the code much more readable for you and anyone who comes along to help you or use your code. And I second that posters comment that brackets should always be used, especially for beginner programmers. Unfortunately beginner programmers often get stuck thinking that less lines of code equals better program, this is not true; even though better programmers often use far less lines of code.
                         // validate the input
   if (numberInput >=10 && numberInput <=100)
          System.out.println("Number stored.");
else
               System.out.println("Invalid number. Please enter a number within range."); Note the above as you have it.
                     // validate the input
                     if (numberInput >=10 && numberInput <=100)
                          System.out.println("Number stored.");
                     else
                          System.out.println("Invalid number. Please enter a number within range."); Note how much more readable just correct indentation makes.
                     // validate the input
                     if (numberInput >=10 && numberInput <=100) {
                          System.out.println("Number stored.");
                     else {
                          System.out.println("Invalid number. Please enter a number within range.");
                     } Note how it should be coded for a beginner coder.
Now that it is readable, exam your code and think about what you are doing here. Do you really want to print "Number Stored" before you checked to ensure it is not a dupe? That could lead to some really confused and frustrated users, and since the main user of your program will be your teacher, that could be unhealthy for your GPA.
Since I am not here to do your homework for you, I will just give you some advice, you only need one if statement to do this correctly, you must drop the else and fix the if. I tell you this, because as a former educator i know the first thing running through beginners minds in this situation is to just make the if statement empty, but this is a big no no and even if you do trick it into working your teacher will not be fooled nor impressed and again your GPA will suffer.
As for the rest, you do need a for loop inside your while loop, but not where or how you have it. Inside the while loop the for loop should be used for checking for dupes, not for overwriting every entry in the array as you currently have it set up to do. And certainly not for printing every element of the array each time a new element is added as your comments lead me to suspect you were trying to do, that would get real annoying really fast again resulting in abuse of your GPA. Printing the array should be in its own for loop after the while loop, or even better in its own method.
As for how to check for dupes, well, you obviously at least somewhat understand loops and if statements, thus you have all the tools needed, so where is the problem?
JSG

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