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How can I get a byte that represents an unsigned int in Java?
OutputStream out;
public void writeToStream(int i) throws Exception {
    out.write(((byte)(i & 0xff)));
}

uint8_t nextByte() {
    while(1) {
    if(Serial.available() > 0) {
        uint8_t b =  Serial.read();
      return b;
     }
    }
}

class writerThread(threading.Thread):
    def __init__(self, threadID, name):
        threading.Thread.__init__(self)
        self.threadID = threadID
        self.name = name
    def run(self):
        while True:
            input = raw_input("[W}Give Me Input!")
            if (input == "exit"):
               exit("Goodbye");
            print ("[W]You input %sn" % input.strip())
            fval = [ int(input.strip()) ]
            ser.write("".join([chr(x) for x in fval]))