How do I get the durability of an item

[IDPreson]

I want to gain the durability of axes, swords, armor, etc

and How I can change thier Attack damage,durability and enchantment

 

[IDPreson]

I would appreciate if you can give a Detailed examples

 

[CreeperFace]

I would appreciate if you can give a Detailed examples

int damage = item.getDamage();
item.setDamage(damage + 1);