Question

I have some code that looks like this:

if there is a collision between player and enemy
    player.health--

I want to do this:

if there is a collision between player and enemy
    player.health--
    wait for 3 seconds

This is to ignore collision for a bit so player’s health doesn’t instantly drop to 0.

How would I implement some sort of timer for this?

Answer 1

to not freeze the movement you would have to either start a new Thread like this

private Thread invul;

if(collision && (invul==null || !invul.isAlive())){
    player.health--;
    invul=new Thread(){
        public void run(){
            Thread.sleep(3000);
        }
    };
    invul.start();
}

---

or maybe simpler save the time the player was hit.

private long lastTimeHit= 0;

if(collision && System.currentTimeMillis() > lastTimeHit+3000){
    lastTimeHit= System.currentTimeMillis();
    player.health--;
}