SpaciousLib - Create a custom anvil

// player: the player who you want to show anvil
// customanvil: the id of anvil
Anvil a = new Anvil(player, "customanvil");
// set item to this anvil
a.setSlot(AnvilSlot.INPUT_LEFT, new ItemStack(Material.DIAMOND, 1));
// open
a.open();
 

@EventHandler
public void clickAnvil(AnvilClickEvent e){
    // check the anvil id
   if(e.getAnvil().getAnvilID().equals("customanvil")){
    // get the slot which player's clicked
     if(e.getSlot().equals(AnvilSlot.OUTPUT)){
        // destroy the anvil (close it and no more open)
        e.getPlayer().sendMessage("Success! Your input: "+e.getInput()); // get the input
        e.setDestory(true);
     }
   }
}


@EventHandler
public void closeAnvil(AnvilCloseEvent event){
   // check the anvil id
    if(event.getAnvil().getAnvilID().equals("customanvil")){
         // reopen it
        event.getAnvil().open();
    }
}