How to store a String of a tcp message send from Java?

General
1

Hi everyone,
I’m using the Photon device for my IoT project.
I’m trying to send a color value in hex format (like FF0000) to Photon over a TCP connection on port 6000 from a Java application.
I’m getting strange debugging situation. Here are the codes:

// This #include statement was automatically added by the Particle IDE.
#include "neopixel/neopixel.h"

TCPServer server = TCPServer(6000);
TCPClient client;

// This #include statement was automatically added by the Particle IDE.
#include "neopixel/neopixel.h"

/*
 * This is a minimal example, see extra-examples.cpp for a version
 * with more explantory documentation, example routines, how to 
 * hook up your pixels and all of the pixel types that are supported.
 *
 */

#include "application.h"

SYSTEM_MODE(AUTOMATIC);

// IMPORTANT: Set pixel COUNT, PIN and TYPE
#define PIXEL_PIN D2
#define PIXEL_COUNT 60
#define PIXEL_TYPE WS2812B




Adafruit_NeoPixel strip = Adafruit_NeoPixel(PIXEL_COUNT, PIXEL_PIN, PIXEL_TYPE);

void setup()
{
  // start listening for clients
  server.begin();

  // Make sure your Serial Terminal app is closed before powering your device
  Serial.begin(9600);
  // Now open your Serial Terminal, and hit any key to continue!
  while(!Serial.available()) Particle.process();

  Serial.println(WiFi.localIP());
  Serial.println(WiFi.subnetMask());
  Serial.println(WiFi.gatewayIP());
  Serial.println(WiFi.SSID());
  
}

void loop()
{
  if (client.connected()) {
    String color;
    color.reserve(10);
    Serial.println(client.available());
    while (client.available()) {
        char c = client.read();
        color+=c;
        // server.println(client.read());
         
    }
    Serial.println(color);
     /*String color = "FF00FF";
     long number = (long) strtol( &color[1], NULL, 16);
     int r = number >> 16;
     int g = number >> 8 & 0xFF;
     int b = number & 0xFF;*/
    client.stop();
  } else {
    // if no client is yet connected, check for a new connection
    client = server.available();
  }
  
}

And the Java’s one:

String sentence = "FF0000";
	String modifiedSentence;
	Socket clientSocket = new Socket("10.0.0.17", 6000);
	DataOutputStream outToServer = new DataOutputStream(clientSocket.getOutputStream());
	BufferedReader inFromServer = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
	outToServer.writeBytes(sentence);
	modifiedSentence = inFromServer.readLine();
	System.out.println("FROM SERVER: " + modifiedSentence);
	clientSocket.close();

From the console of Atom software I got just an F, which is the first char. If I try to print also the value of the client.available(), I’m getting one, why? As I explained before, the idea is to store the entire color value in the String value color in the Photon software. Thank you in advance for your help!