Help me to change the durability of an item or an armor

So i want to change the durability of an item and an armor but it dont work can you help me ?

I try to recode the armor

public function getDefensePoints() : int
{
return 3;
}

public function getMaxDurability() : int
{
return 1300;
}

this dont work and for the item


public function __construct($meta = 0, $count = 1){
parent::__construct(285, 0, "Gold Pickaxe");

}

public function getMaxDurability(): int
{

return 1000;
}

public function getMaxStackSize(): int{
return 1;
}

public function onDestroyBlock(Block $block): bool
{
var_dump($this->getDamage());

$this->applyDamage(mt_rand(1,2));
return true;
}

This work but the durability bar is bug so have you got any solution to up the durability ?
Thanks for help me

 

PHP:

public function onBreak(BlockBreakEvent $event) : void{

$item = $event->getPlayer()->getInventory()->getItemInHand();

$event->getPlayer()->getInventory()->setItemInHand($item->setDamage(rand(1,2)));

}

 

and for armor ? the same but with the event EntityDamageByEntityEvent ?

 

PHP:

public function onDamage(EntityDamageEvent $event) : void{

$player = $event->getEntity();

if(!$player instanceof Player){
return;
}

$player->getArmorInventory()->setHelmet($player->getArmorInventory()->getHelmet()->setDamage($player->getArmorInventory()->getHelmet()->getDamage()++));

$player->getArmorInventory()->setChestplate($player->getArmorInventory()->getChestplate()->setDamage($player->getArmorInventory()->getChestplate()->getDamage()++));

$player->getArmorInventory()->setLeggings($player->getArmorInventory()->getLeggings()->setDamage($player->getArmorInventory()->getLeggings()->getDamage()++));

$player->getArmorInventory()->setBoots($player->getArmorInventory()->getBoots()->setDamage($player->getArmorInventory()->getBoots()->getDamage()++));

}

 

thanks