problem when communicating C++ client and Java server

[tdnghia89]

Hi all, I have the following problem:
My server sends the string str="1 2 4 dds \n" continuously to a C++ client.Here is the java code of the server:

private class SendingThread implements Runnable{

	    	public Socket s;
	    	public DataOutputStream oo;
	    	public ObjectInputStream oi;
	    	////private QueryTransferObject q;
	    	boolean connected;

	    

			public SendingThread() {
				super();
				// TODO Auto-generated constructor stub
			}



			@Override
	        public void run() {
	            try {
	      
	                Socket s = new Socket("137.132.153.60",8080);
	                connected = true;
byte[] str;
str=new byte[25600];
str="1 2 4 dds \n".getBytes();
	                while (connected) {
	                    try {

	                    		ObjectOutputStream oo=new ObjectOutputStream(s.getOutputStream());

	         		            oo.write(str);
	         		            
	                    		oo.flush();
	         		        	System.out.print("send \n");
	         //		        	Log.d("SendingThread", "C: Send data object finished.");
	         				//	connected = false;
	         		        	
		                    	Thread.sleep(2000);

	                    } catch (Exception e) {
	        //                Log.e("SendingThread", "S: Error", e);
	                    }
	                }

Here is the partial C code of the client:

if (bind(sockfd, (struct sockaddr *) &serv_addr,
              sizeof(serv_addr)) < 0) 
              error("ERROR on binding");
     listen(sockfd,5);
     
     clilen = sizeof(cli_addr);
     newsockfd = accept(sockfd, 
                 (struct sockaddr *) &cli_addr, 
                 &clilen);
     while(1)
     {


     printf("I am here\n");
     if (newsockfd < 0) 
          error("ERROR on accept");
     bzero(buffer,256);
     n = read(newsockfd,buffer,255);
     if (n < 0) error("ERROR reading from socket");
     printf("Here is the message: %s\n",buffer);

     }

The client keeps displaying this result:

I am here
Here is the message: �
I am here
Here is the message: w
1 2 4 dds

It seems that the message is not received correctly. Can anyone give some insight on how to fix it ? Thank you!