Unable to parse the entire UDP message at client side

Question

This is the String sent at UDP server side:
S:0 T:1 FL:4 IP:127.0.0.1 P:9000

I am able to tokenize and print up until the last word, when I get this error:

Exception in thread "Thread-2" java.lang.NumberFormatException: For input string: "9000  
at java.lang.NumberFormatException.forInputString(Unknown Source)    
at java.lang.Integer.parseInt(Unknown Source)  
at java.lang.Integer.parseInt(Unknown Source)  
at com.acn.fog.listener.UdpListener.tokenizeIotIntoPacket(UdpListener.java:119)  
at com.acn.fog.listener.UdpListener.run(UdpListener.java:43)  
at java.lang.Thread.run(Unknown Source)  

Server code:

    clientSocket = new DatagramSocket(); // make a Datagram socket  
    byte[] sendData = new byte[data.getBytes().length]; // make a Byte array of the data to be sent  
    sendData = data.getBytes(); // get the bytes of the message  
    DatagramPacket sendPacket = new DatagramPacket(sendData, sendData.length, IPAddress, port); // craft the message to be sent  
    clientSocket.send(sendPacket); // send the message  

Client code:

    byte[] receiveData = new byte[10000]; // data size not to exceed ~10KB  
    DatagramPacket receivePacket = new DatagramPacket(receiveData,   receiveData.length); // receive the response  
    serverSocket.receive(receivePacket);  
    // Tokenize received IOT packet into String  
    String iotPacketString = new String(receivePacket.getData());  

Appreciate any help on this issue. Thanks

Answer 1

Unable to parse the entire UDP message at client side

You are parsing more than the entire UDP message:

String iotPacketString = new String(receivePacket.getData()); 

Invalid. You're ignoring the length. That should be:

String iotPacketString = new String(receivePacket.getData(), receivePacket.getOffset(), receivePacket.getLength());