problem in reading input stream from a socket

[jitendra kumar sharma]

I have created a socket to a linux machine on my local network, socket is created and connected successfully, then I have created one DataInputStream and one DataOutputStream by socket. writing a byte array and length of byte array to output stream and then flush output stream. But when I try to read input stream it is blocked due to no data is available in input stream, I check this by available() method.

However, I connected to this socket in iphone and flex successfully, can anyone suggest me what should i do to resolve this.

thanks in advance.

[Rob Spoor]

Available doesn't do what you think it does

[jitendra kumar sharma]

I have solved this problem,
but when i tried my code in android application, I am getting same error, my code as follows:

output.writeInt(json.length());
			output.writeBytes(json);
			output.flush();
			System.out.println("bytes written:"+output.size());
			System.out.println(json);
			int iBlockingTimeMS = 500;
			int avail; //number of available bytes in input stream
			
			while(true)	
			{

				try {
					avail=input.available();
					if (avail<=0) {
						//active waiting:
						input.read(new byte[0]);
						Thread.sleep( iBlockingTimeMS );
					}
					else
						break;
				} catch (InterruptedException e) {}
			}
			//retry after active waiting
			
			byte arr[]=new byte[avail];
			int read=input.read(arr);
			System.out.println(json);
			String response=new String(arr);
			response=response.substring(response.indexOf('{'));
			JSONObject responseInJson;
			double returnedID;
			try {
				responseInJson = new JSONObject(response);
				returnedID=responseInJson.getDouble("result");
			} catch (JSONException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}

[Rob Spoor]

Please Use Code Tags. I've added them for you this time.

I see you still use available(). Why? If you want to use non-blocking I/O check out SocketChannel in combination with a Selector instead.