Removing blocks in front of a flying arrow

I'm writing a plugin where I have to remove a block in front of a flying arrow. Can someone give me some code examples.

 

ProjectileHitEvent

 

@MCMatters With ProjectileHitEvent I can't get the hit block

 

use e.getEntity().getLocation.getBlock()

 

@letsgo00
here

 

@Gater12 with a flying arrow this does not work. The arrow stops in the blocks.

 

@letsgo00
Put a repeating task that runs each tick, when the entity died you cancel the task. Each time you get the next location by adding the arrow's velocity to it's location and set that block to air.

 

@megamichiel is this correct?

Code:

private void removeBlock(){
        Bukkit.getScheduler().scheduleSyncRepeatingTask(Main.getPlugin(), new Runnable() {
           
            @Override
            public void run() {
                for(Arrow a : arrows){
                    if(a.isDead() || a.getLocation().getBlockY() <= 0){
                        arrows.remove(a);
                    }
                    Location l = a.getLocation();
                    Block hitBlock = l.add(a.getVelocity()).getBlock();
                   
                   
                    if (hitBlock.getType() == Material.ICE || hitBlock.getType() == Material.PACKED_ICE) {
                        hitBlock.setType(Material.AIR);
                    }
                }
               
            }
        }, 0, 1);
    }

 

@megamichiel Holy shit that's smart..

 

@letsgo00
Almost , you remove the arrow from the list, but because it's in a for loop, it will throw a ConcurrentModificationException. Change the beginning part to this:

Code:

Iterator<Arrow> it = arrows.iterator(); //Create a new iterator
while(it.hasNext()) { //
  Arrow a = it.next(); //Get the next arrow
  if(a.isDead() || a.getLocation().getBlockY() <= 0) {
    it.remove(); //If you call a normal List#remove it will throw a CME, because a 'for' loop creates a new iterator instance, but when you suddenly remove an item from the list the iterator does not like that.
  }

 

@megamichiel It's still not braking all the blocks. When it brakes the first block then it stops and falls.
Here is the code:

Code:

private void removeBlock(){
        Bukkit.getScheduler().scheduleSyncRepeatingTask(Main.getPlugin(), new Runnable() {
           
            @Override
            public void run() {
                Iterator<Arrow> it = arrows.iterator();
                while(it.hasNext()) {
                  Arrow a = it.next();
                    if(a.isDead() || a.getLocation().getBlockY() <= 0){
                        arrows.remove(a);
                    }
                    Location l = a.getLocation();
                    Block hitBlock = l.add(a.getVelocity()).getBlock();
                   
                   
                    if (hitBlock.getType() == Material.ICE || hitBlock.getType() == Material.PACKED_ICE) {
                        hitBlock.setType(Material.AIR);
                    }
                }
               
            }
        }, 0, 1);
    }