random enchantment on an item

How would i get a random enchantment on an item. How would i get all the possible enchantments for an item and apply one of them and after that get all the different levels of that enchantment and apply that one

 

Code:java

public ItemStack randomEnchantment(ItemStack item) {
    // Store all possible enchantments for the item
    List<Enchantment> possible = new ArrayList<Enchantment>();
 
    // Loop through all enchantemnts
    for (Enchantment ench : Enchantment.values()) {
        // Check if the enchantment can be applied to the item, save it if it can
        if (ench.canEnchantItem(item)) {
            possible.add(ench);
        }
    }
 
    // If we have at least one possible enchantment
    if (possible.size() >= 1) {
        // Randomize the enchantments
        Collections.shuffle(possible);
        // Get the first enchantment in the shuffled list
        Enchantment chosen = possible.get(0);
        // Apply the enchantment with a random level between 1 and the max level
        item.addEnchantment(chosen, 1 + (int) (Math.random() * ((chosen.getMaxLevel() - 1) + 1)));
    }
 
    // Return the item even if it doesn't have any enchantments
    return item;
}