I have 3 Xbee modules:
XBee1 connected to PC
XBee2 connected to sensor 1
XBee3 connected to sensor 2

I am currently reading data from sensor 1 to the PC using:

temprx = arduino.analogRead(temp); // Read data from temp sensor

Having set up ardunio using:

println(Arduino.list());  // List serial ports available to arduino
//Select serial port attached to arduino
arduino = new Arduino(this, Arduino.list()[1], 9600);

I now need to read the data from Sensor 2, so I had planned to configure XBee1 using:

void xset()
{
  println(Serial.list()); // List serial ports available
 // Select serial port connected to XBee
 port = new Serial(this, Serial.list()[1], 9600);
 int inByte = 0; // Declare variable called inByte
 port.write("+++"); // Put XBee into command mode
 delay(1100);  // Wait 1.1 sec
 // See if xbee replies
 while (inByte != '\r')
 {
   if (port.available() >0)
   {
     inByte = port.read();
     println (inByte);  // CHECK: XBee's reply
   }
 }
 port.write("ATDL5678\r"); // Set XBee destination address
 port.write("ATMY1234\r"); // Set XBee address
 port.write("ATWR\r"); // Save changes to XBee
 port.write("ATCN\r");  // Return XBee to data mode
 
}

I don't seem to be able to do this as the serial port is occupied from the previous:

println(Arduino.list());  // List serial ports available to arduino
//Select serial port attached to arduino
arduino = new Arduino(this, Arduino.list()[1], 9600);

Is there away to pause/stop this so I can access the serial port to carry out the configurtion.