how do I send a line through the server in a loop?

Socket s1=new Socket("localhost",3001);
System.out.println("Client process");
byte b[]=new byte[150];
int n=4;
BufferedReader BR=new BufferedReader(new InputStreamReader(s1.getInputStream()));
String str=new String();
while((str=BR.readLine())!=null)
{
    System.out.println();
    System.out.println(str);
}
s1.close();

In the above code I'm trying to read a line from server and print that line on client machine.But the client couldn't read a line until the server is finished开发者_高级运维 writing all lines and closed.Please help me how to read a line from server at a time.

Check if the server flushes its output stream after each line.

Client code :

Socket s1=new Socket("localhost",4444); 
    System.out.println("Client process"); 
    byte b[]=new byte[150]; 
    int n=4; 
    BufferedReader BR= new BufferedReader(new InputStreamReader(s1.getInputStream())); 
    String str=new String(); 
    while((str=BR.readLine())!=null) {     
        System.out.println();     
        System.out.println(str); 
    } 
    s1.close(); 

Simple server code :

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);   
    }           
    PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), true); 
    BufferedReader in = new BufferedReader(  
            new InputStreamReader(clientSocket.getInputStream()));
    String inputLine, outputLine; 
    // write to client
    for(int i=0;i<10;i++){
        out.println("hello from server" + i);
        Thread.sleep(1000);
        System.out.println("Server sent " + i);
    }

    out.close();         
    in.close();         
    clientSocket.close();         
    serverSocket.close();     
    System.err.println("Server done.. closing now..");  

PS : add these into main methods , and add the throws clause with appropriate exceptions.