Sending object over socket - please help (urgent)

Question

I have written a server/client application where server sends object to client.
But on the client I've received the first message "@Line 1: Get ready!!!" TWICE but NEVER the second message "@Line 2: Please input Start".
Please help me! Its urgent! I appreciate my much in advance.
The source for Server:
import java.net.*;
import java.io.*;
import java.util.*;
import sendNode;
public class TestSer {
     static sendNode sendNodeObj = new sendNode();
static String inputLine;
     public static void main(String[] args) throws IOException {
ServerSocket serverSocket = null;
try {
serverSocket = new ServerSocket(4444);
} catch (IOException e) {
System.err.println("Could not listen on port: 4444.");
System.exit(1);
Socket clientSocket = null;
try {
clientSocket = serverSocket.accept();
} catch (IOException e) {
System.err.println("Accept failed.");
System.exit(1);
OutputStream o = clientSocket.getOutputStream();
ObjectOutput out=new ObjectOutputStream(o);
BufferedReader in = new BufferedReader(
                    new InputStreamReader(
                    clientSocket.getInputStream()));
sendNodeObj.sendMsg="@Line 1: Get ready!!!";
sendNodeObj.typeNode=-1;
out.writeObject(sendNodeObj);
out.flush();
sendNodeObj.sendMsg="@Line 2: Please input Start";
sendNodeObj.typeNode=-2;
out.writeObject(sendNodeObj);
out.flush();
inputLine = in.readLine();
while (!inputLine.equalsIgnoreCase("Start")) {
     sendNodeObj.sendMsg="@Error, Please input Start";
sendNodeObj.typeNode=-1;
out.writeObject(sendNodeObj);
out.flush();
inputLine = in.readLine();
out.close();
in.close();
clientSocket.close();
serverSocket.close();
The source code for Client :
import java.io.*;
import java.net.*;
import java.util.*;
import java.applet.Applet;
import sendNode;
public class TestCli extends Applet {
static sendNode recNodeObj=null;
public static void main(String[] args) throws IOException {
BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in));
Socket kkSocket = null;
PrintWriter out = null;
try {
kkSocket = new Socket("127.0.0.1", 4444);
out = new PrintWriter(kkSocket.getOutputStream(), true);
} catch (UnknownHostException e) {
System.err.println("Don't know about host.");
System.exit(1);
} catch (IOException e) {
System.err.println("Couldn't get I/O for the connection to: taranis.");
System.exit(1);
InputStream i= kkSocket.getInputStream();
ObjectInput in= new ObjectInputStream(i);
try {
     recNodeObj = (sendNode)in.readObject();
System.out.println(recNodeObj.sendMsg);
     recNodeObj = (sendNode)in.readObject();
System.out.println(recNodeObj.sendMsg);
if (recNodeObj.sendMsg.equalsIgnoreCase("@Line 2: Please input Start")) {
out.println("Start");
} catch (Exception e) {
System.out.println(e.getMessage());
System.out.println("receive error.");
System.exit(1);
out.close();
in.close();
stdIn.close();
kkSocket.close();
The object to be sent:
import java.io.*;
import java.net.*;
import java.util.*;
class sendNode implements Serializable {
String sendMsg;
int typeNode; // -1 no ObjectNode;
// 1 right node, 2 base node, 3 left node;
Object objectNode;

Answer 1

You forgot to reset the OOS. ObjetOutputStream keeps a buffer of objects, so if you write the same object again with changes on it, you must reset the buffer.
out.writeObject(sendNodeObj);
out.flush();
out.reset();