Heal.java

package mrwaffleman.me;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.plugin.java.JavaPlugin;

public class Heal implements CommandExecutor {
    public boolean onCommand(CommandSender sender, Command cmd, String commandLabel, String[] args) {
        if (!(sender instanceof Player)) {
            sender.sendMessage(ChatColor.RED + "Only Players can use this command!");
            return true;
        }

        Player player = (Player) sender;

        if(cmd.getName().equalsIgnoreCase("heal")) {
            if(args.length == 0) {
                player.setHealth(20);
                player.sendMessage(ChatColor.GREEN + "You have been healed!");
                return true;
            }
            Player target = Bukkit.getServer().getPlayer(args[0]);
            if(target == null) {
                player.sendMessage(ChatColor.RED + "Could not find a player of that name");
                return true;
            }
            target.setHealth(20);
            target.sendMessage(ChatColor.GREEN + "You have been healed!");
            player.sendMessage(ChatColor.GREEN + target.getName() + "has been healed!");
        }
        return true;
    }
}