Solved DIsplaying a text over (or under) player's nametag

Hello forumers,
I'm making a plugin showing damage dealt on hit, i looks like a red negative number showing amount of damage for a while, and some other information like "Critical!" (Who played TF2 knows what i'm talking about), so i have it working for LivingEntities (except Players) (setting custom name), but have a algorithm looked up from filoghost's HealthBar. Problem is I don't fully understand his way of displaying the custom text under nickname.
Here's some code:

Code:java

public void onEnable(){
        //enable stuff
          sc = Bukkit.getScoreboardManager().getMainScoreboard();
 
        dmgObjective = sc.registerNewObjective(scObjectiveName, "dummy");
        dmgObjective.setDisplaySlot(DisplaySlot.BELOW_NAME);
        dmgObjective.setDisplayName("HP");   
    }
public void onDisable(){
sc.getObjective(DisplaySlot.BELOW_NAME).unregister();
}

Code:java

public class Listeners implements Listener {
 
    public int timeout = 20;
 
    @EventHandler
    public void entityDamage(final EntityDamageByEntityEvent ede){
        System.out.println("FIRING EDE");
        if(ede.getEntityType().equals(EntityType.PLAYER)){
            System.out.println("player");
            SCtest.dmgObjective.getScore(((Player) ede.getDamager()).getName()).setScore(-9);
            Bukkit.getScheduler().runTaskLater(SCtest.instance, new Runnable(){
                @Override
                public void run() {
                    SCtest.dmgObjective.getScore(((Player) ede.getDamager()).getName()).setScore(0);
 
                }
            }, timeout);
        }else{
            final LivingEntity mob = (LivingEntity) ede.getEntity();
            mob.setCustomName(SCtest.cmsg("&4&o&l-"+ede.getDamage()+"/"+mob.getHealth()));
            mob.setCustomNameVisible(true);
            Bukkit.getScheduler().runTaskLater(SCtest.instance, new Runnable(){
                @Override
                public void run() {
                    mob.setCustomName(null);
                    mob.setCustomNameVisible(false);
                }
            }, timeout);
        }
    }
 
}

Here's the error, coming up when replacing DisplaySlot with SIDEBAR:

Code:

[23:02:21 INFO]: FIRING EDE
[23:02:21 INFO]: player
[23:02:21 ERROR]: Could not pass event EntityDamageByEntityEvent to SCTest v1.0
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:427) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.jav
a:62) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.j
ava:481) [craftbukkit.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j
ava:466) [craftbukkit.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at org.bukkit.craftbukkit.v1_7_R1.event.CraftEventFactory.callEvent(Craf
tEventFactory.java:94) [craftbukkit.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at org.bukkit.craftbukkit.v1_7_R1.event.CraftEventFactory.callEntityDama
geEvent(CraftEventFactory.java:382) [craftbukkit.jar:git-Bukkit-1.7.2-R0.2-b2974
jnks]
        at org.bukkit.craftbukkit.v1_7_R1.event.CraftEventFactory.handleEntityDa
mageEvent(CraftEventFactory.java:410) [craftbukkit.jar:git-Bukkit-1.7.2-R0.2-b29
74jnks]
        at net.minecraft.server.v1_7_R1.EntityLiving.damageEntity(EntityLiving.j
ava:656) [craftbukkit.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.EntityHuman.damageEntity(EntityHuman.jav
a:746) [craftbukkit.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.EntityPlayer.damageEntity(EntityPlayer.j
ava:446) [craftbukkit.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.EntityHuman.attack(EntityHuman.java:918)
[craftbukkit.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.PlayerConnection.a(PlayerConnection.java
:1092) [craftbukkit.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.PacketPlayInUseEntity.a(SourceFile:55) [
craftbukkit.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.PacketPlayInUseEntity.handle(SourceFile:
10) [craftbukkit.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.NetworkManager.a(NetworkManager.java:146
) [craftbukkit.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.ServerConnection.c(SourceFile:134) [craf
tbukkit.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.MinecraftServer.u(MinecraftServer.java:6
55) [craftbukkit.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.DedicatedServer.u(DedicatedServer.java:2
50) [craftbukkit.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.MinecraftServer.t(MinecraftServer.java:5
45) [craftbukkit.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java
:457) [craftbukkit.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:6
17) [craftbukkit.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
Caused by: java.lang.NoSuchMethodError: org.bukkit.scoreboard.Objective.getScore
(Ljava/lang/String;)Lorg/bukkit/scoreboard/Score;
        at sctest.Listenery.entityDamage(Listenery.java:21) ~[?:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0
_65]
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0
_65]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1
.7.0_65]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.7.0_65]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:425) ~[craftbukkit.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
        ... 20 more

I'm using Craftbukkit, and here's the project's build path

 

nzkiwi.5000 Remove a bukkit jar you only want one. Also one is 1.7.2 and one is 1.7.10 remove the craftbukkit.jar.

 

@bwfcwalshyWhat do you mean by that? Remove Craftbukkit from Build Path, and make same version oc BuildPath's bukkit jar and server engine?

 

Just update your craftbukkit on your server. You are running an old version

 

Caused by: java.lang.NoSuchMethodError: org.bukkit.scoreboard.Objective.getScore
(Ljava/lang/StringLorg/bukkit/scoreboard/Score;

 

Rocoty Thanks