Method checkLocalHost

java/src/processing/mode/java/runner/Runner.java:125–141

Has the user screwed up their hosts file? https://github.com/processing/processing/issues/4738

()

   * https://github.com/processing/processing/issues/4738
   */
  static private void checkLocalHost() throws SketchException {
    try {
      InetAddress address = InetAddress.getByName("localhost");
      if (!address.getHostAddress().equals("127.0.0.1")) {
        System.err.println("Your computer is not properly mapping 'localhost' to '127.0.0.1',");
        System.err.println("which prevents sketches from working properly because 'localhost'");
        System.err.println("is needed to connect the PDE to your sketch while it's running.");
        System.err.println("If you don't recall making this change, or know how to fix it:");
        System.err.println("https://www.google.com/search?q=add+localhost+to+hosts+file+" + Platform.getName());
        throw new SketchException("Cannot run due to changes in your 'hosts' file. " +
                                  "See the console for details.", false);
      }

    } catch (UnknownHostException e) {
      e.printStackTrace();
    }
  }


  public VirtualMachine launch(String[] args) {