How to use

onBackPressed

method

in

processing.core.PApplet

 @Override
 public void run() {
  sketch.doExit = false;
  sketch.onBackPressed();
 }
});

@Override
public void onBackPressed() {
  if (sketch != null) {
    sketch.onBackPressed();
    if (sketch.handledBackPressed) return;
  }
  super.onBackPressed();
}