Round to the nearest half a heart?

I have this as part of my plugin which will send a message to someone when they died how many hearts their killer was on. Here is the code, How can i round the hearts to the nearest half a heart?

Code:java

@EventHandler
    public void onDeath(PlayerDeathEvent e){
 
        Player killed = e.getEntity();
        Player killer = e.getEntity().getKiller();
 
        if((killed instanceof Player) && (killer instanceof Player)){
 
            killed.sendMessage(ChatColor.AQUA + "[Minecentre] " + ChatColor.YELLOW + "Your killer was " +  ChatColor.AQUA + killer.getName() + ChatColor.YELLOW + " and they were on" + ChatColor.AQUA + killer.getHealth()/2 + ChatColor.YELLOW + " hearts!");
            killer.sendMessage(ChatColor.AQUA + "[Minecentre] " + ChatColor.RED + "You have slain " + e.getEntity().getName());}
            e.setDeathMessage(ChatColor.AQUA + "[Minecentre] " + killed.getName() + ChatColor.YELLOW + " was killed by " + ChatColor.RED + killer.getName());
 
        }

Should I create a string and then round it like that?
So i do
String hearts - killer.getHealth()/2
But how would i round that to nearest 0.5?

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

Edit:
I may have misunderstood your problem. I think your problem is, that you are dividing two integers. In Java 5/2 is 2. Because it will always ignore the remainder.

What you need to do is to either cast to double or float or just devide by 2.0.

 

killer.getHealth()/2.0?

 

yes

 

is there a way to heal a player once he is down to half a heart please i need to know

 

edm wasrevilosmith1999 AmShaegar

Don't use 2.0, use 2d or 2f, it is much clearer what you mean and is more specific.

 

edm wasrevilosmith1999

Hmm, this is pretty simple. You just round it. Open wide, a spoonfeed is coming!

Code:java

            int i = (int)Math.round(player.getKiller().getHealth());
            double health = i;
            if (health < 1.0D) {
              health = 1.0D;
            }
            player.sendMessage(ChatColor.RED + "Your Beefy killer was on " + health / 2.0D + " hearts :(");