Increasing Apple Drop Rate

How do you increase the apple drop rate?

 

Once you break a leaf block without using shears, cancel the event. Remove the leaf block, drop some apples based on an algorithm.

 

example please?

 

Pseudo-code, it doesn't work. Meant to be readable by the normal human eye

Code:

When player breaks a block:
 if Block is a leaf Block and Player's held item is not a shear then:
  Cancel this event. Meaning, don't let the block break.
  Remove the blocks, or effectively just set it to air.
  Do some fancy doo-dad algorithm, probably just using Random
  if the random is equal/less then/more then/whatever then you want:
   drop Apple

 

Code:

@EventHandler
//When player breaks a block:
public void onBlockBreak(BlockBreakEvent event){
//if Block is a leaf Block and Player's held item
if(event.getBlock().getType().equals(Material.LEAF) && event.getPlayer().getItemInHand().equals(Material.SHEARS)) {
  /*Cancel this event. Meaning, don't let the block break.*/
event.setCancelled(true);
//Remove the blocks, or effectively just set it to air.
event.getBlock().setType(Material.AIR);
//Do some fancy doo-dad algorithm, probably just using Random
Random rand = new Random();
int randomNumber = rand.nextInt(3);
switch(randomNumber){
default:
break;
case 1:
event.getPlayer().getLocation().dropItemNaturally(new Itemstack(Material.APPLE, 1));
break;
case 2:
event.getPlayer().getLocation().dropItemNaturally(new Itemstack(Material.APPLE, 1));
break;
}
}
}
}