Set Amount

Hi Guys,
I have an problem with an project I'm working on!
I want it to make that you have an sign with on the first line the text: [free] and on the second line an ItemID and on the thirth line the amount.
The problem is that I can't set the amount!
My Code:

Code:java

 Block block = event.getClickedBlock();
 
      switch(block.getType()) {
        case SIGN_POST:
        case WALL_SIGN:
        case SIGN:
          if(((Sign) block.getState()).getLine(0).equalsIgnoreCase("[free]")){
              ItemStack buy = new ItemStack(Material.getMaterial(Integer.parseInt(((Sign) block.getState()).getLine(1))));                 
              buy.setAmount((((Sign) block.getState()).getLine(2)));
          }
          break;
        default:
          break;
      }

The problem:

Code:java

 buy.setAmount((((Sign) block.getState()).getLine(2)));

I hope someone can help me out!
Bye

 

What exactly IS the problem?

 

I try to set the amount to the thirt line of an sign but I don't no how to do that!

 

ItsMees
You need to parse the string to an int.

Code:

Integer.parseInt(string)