Bryan Chung

It is a very simple code to try reaching an Internet location and returns if it can be done within a time limit specified in the timeOut variable in ms. It uses the isReachable() method for the InetAddress object instance.

InetAddress ip;
String ipAddr;
int timeOut;
boolean ok;
PFont font;

void setup() {
  size(400,400);
  smooth();
  ipAddr = "www.bryanchung.net";
  timeOut = 2000;
  ok = false;
  noStroke();
  font = loadFont("Calibri-32.vlw");
  textFont(font);
  textAlign(CENTER);
}

void draw() {
  background(0);
  text(str(ok),width/2,height/2);
}

void mousePressed() {
  try {
    ip = InetAddress.getByName(ipAddr);
    ok = ip.isReachable(timeOut);
  }
  catch (Exception e) {
    e.printStackTrace();
  }
}