arduino joystick wiring

i purchased arduino compatible joystick, i'm not sure how wire it. presume needs analog input , ground there 5 pins in total. can suggest need plug each of pins? bought from:

http://www.amazon.co.uk/gp/product/b00db76xim?psc=1&redirect=true&ref_=oh_aui_detailpage_o02_s00

the pins labelled: gnd, +5u, vrx, vry, sw.

any appreciated.

from sellers website:

code:
#define joys_vrx_dio a0    /* selects input pin joysticks x-axis */
#define joys_vry_dio a1    /* selects input pin joysticks y-axis */

#define joys_sw_dio 2      /* selects input pin joysticks push button */


/* initialises serial , dio */
void setup()
{
  /* sets serial port displaying status of sensor */
  serial.begin(9600);
 
  /* configures dio pin joysticks push button connected
     to. has no pull-up need enable arduino's internal pull-up */
  pinmode(joys_sw_dio, input);
  digitalwrite(joys_sw_dio, high); // turns on pull-up resistors
}


/* main program loop */
void loop()
{
  /* reads current position of joysticks x & y axis via analogue pins */
  serial.print("x axis: ");
  serial.print(analogread(joys_vrx_dio));
  serial.print("  y axis: ");
  serial.print(analogread(joys_vry_dio));
 
  /* reads state of push button , if pressed, outputs state
     serial port */
  if (!digitalread(joys_sw_dio))
  {
    serial.println("  button pressed !");
  }else
  {
     serial.println();
  }
}

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