JAVA

java every second

Timer timer = new Timer();
timer.schedule(new TimerTask() {
  @Override
  public void run() {
    //what you want to do
  }
}, 0, 1000);//wait 0 ms before doing the action and do it evry 1000ms (1second)

timer.cancel();//stop the timer

java every second

class SayHello extends TimerTask {
    public void run() {
       System.out.println("Hello World!"); 
    }
}

// And From your main() method or any other method
Timer timer = new Timer();
timer.schedule(new SayHello(), 0, 5000);