Utilizing Wither Bar!

So recently, I tried to make a plugin from chasechocolate Idea (https://forums.bukkit.org/threads/tutorial-utilizing-the-boss-health-bar.158018/) But Im getting errors!

Code:

Code:java

package me.HeavyMine13.bar;
 
 
import java.lang.reflect.Field;
import java.util.HashMap;
 
import net.minecraft.server.v1_6_R3.DataWatcher;
import net.minecraft.server.v1_6_R3.EntityPlayer;
import net.minecraft.server.v1_6_R3.Packet205ClientCommand;
import net.minecraft.server.v1_6_R3.Packet24MobSpawn;
import net.minecraft.server.v1_6_R3.Packet29DestroyEntity;
import net.minecraft.server.v1_6_R3.Packet40EntityMetadata;
 
import org.bukkit.Location;
import org.bukkit.craftbukkit.v1_6_R3.entity.CraftPlayer;
import org.bukkit.entity.EntityType;
import org.bukkit.entity.Player;
import org.bukkit.event.Listener;
import org.bukkit.plugin.Plugin;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.scheduler.BukkitRunnable;
 
public class Bar extends JavaPlugin implements Listener{
public static final int ENTITY_ID = 1234;
private static HashMap<String, Boolean> hasHealthBar = new HashMap<String, Boolean>();
public static void sendPacket(Player player, net.minecraft.server.v1_6_R3.Packet packet){
EntityPlayer entityPlayer = ((CraftPlayer) player).getHandle();
entityPlayer.playerConnection.sendPacket(packet);
}
//Accessing packets
@SuppressWarnings("deprecation")
public static Packet24MobSpawn getMobPacket(String text, Location loc){
Packet24MobSpawn mobPacket = new Packet24MobSpawn();
mobPacket.a = (int) ENTITY_ID; //Entity ID
mobPacket.b = (byte) EntityType.WITHER.getTypeId(); //Mob type (ID: 64)
mobPacket.c = (int) Math.floor(loc.getBlockX() * 32.0D); //X position
mobPacket.d = (int) Math.floor(loc.getBlockY() * 32.0D); //Y position
mobPacket.e = (int) Math.floor(loc.getBlockZ() * 32.0D); //Z position
mobPacket.f = (byte) 0; //Pitch
mobPacket.g = (byte) 0; //Head Pitch
mobPacket.h = (byte) 0; //Yawn
mobPacket.i = (short) 0; //X velocity
mobPacket.j = (short) 0; //Y velocity
mobPacket.k = (short) 0; //Z velocity
DataWatcher watcher = getWatcher(text, 300);
try{
Field t = Packet24MobSpawn.class.getDeclaredField("t");
t.setAccessible(true);
t.set(mobPacket, watcher);
} catch(Exception e){
e.printStackTrace();
}
return mobPacket;
}
public static Packet29DestroyEntity getDestroyEntityPacket(){
Packet29DestroyEntity packet = new Packet29DestroyEntity();
packet.a = new int[]{ENTITY_ID};
return packet;
}
public static Packet40EntityMetadata getMetadataPacket(DataWatcher watcher){
Packet40EntityMetadata metaPacket = new Packet40EntityMetadata();
metaPacket.a = (int) ENTITY_ID;
try{
Field b = Packet40EntityMetadata.class.getDeclaredField("b");
b.setAccessible(true);
b.set(metaPacket, watcher.c());
} catch(Exception e){
e.printStackTrace();
}
return metaPacket;
}
public static Packet205ClientCommand getRespawnPacket(){
Packet205ClientCommand packet = new Packet205ClientCommand();
packet.a = (int) 1;
return packet;
}
public static DataWatcher getWatcher(String text, int health){
DataWatcher watcher = new DataWatcher();
watcher.a(0, (Byte) (byte) 0x20); //Flags, 0x20 = invisible
watcher.a(6, (Float) (float) health);
watcher.a(10, (String) text); //Entity name
watcher.a(11, (Byte) (byte) 1); //Show name, 1 = show, 0 = don't show
//watcher.a(16, (Integer) (int) health); //Wither health, 300 = full health
return watcher;
}
//Other methods
public static void displayTextBar(String text, final Player player){
Packet24MobSpawn mobPacket = getMobPacket(text, player.getLocation());
sendPacket(player, mobPacket);
hasHealthBar.put(player.getName(), true);
new BukkitRunnable(){
@Override
public void run(){
Packet29DestroyEntity destroyEntityPacket = getDestroyEntityPacket();
sendPacket(player, destroyEntityPacket);
hasHealthBar.put(player.getName(), false);
}
}.runTaskLater(Bar.getInstance(), 120L);
}
private static Plugin getInstance() {
return null;
}
public static void displayLoadingBar(final String text, final String completeText, final Player player, final int healthAdd, final long delay, final boolean loadUp){
Packet24MobSpawn mobPacket = getMobPacket(text, player.getLocation());
sendPacket(player, mobPacket);
hasHealthBar.put(player.getName(), true);
new BukkitRunnable(){
int health = (loadUp ? 0 : 300);
@Override
public void run(){
if((loadUp ? health < 300 : health > 0)){
DataWatcher watcher = getWatcher(text, health);
Packet40EntityMetadata metaPacket = getMetadataPacket(watcher);
sendPacket(player, metaPacket);
if(loadUp){
health += healthAdd;
} else {
health -= healthAdd;
}
} else {
DataWatcher watcher = getWatcher(text, (loadUp ? 300 : 0));
Packet40EntityMetadata metaPacket = getMetadataPacket(watcher);
Packet29DestroyEntity destroyEntityPacket = getDestroyEntityPacket();
sendPacket(player, metaPacket);
sendPacket(player, destroyEntityPacket);
hasHealthBar.put(player.getName(), false);
//Complete text
Packet24MobSpawn mobPacket = getMobPacket(completeText, player.getLocation());
sendPacket(player, mobPacket);
hasHealthBar.put(player.getName(), true);
DataWatcher watcher2 = getWatcher(completeText, 300);
Packet40EntityMetadata metaPacket2 = getMetadataPacket(watcher2);
sendPacket(player, metaPacket2);
new BukkitRunnable(){
@Override
public void run(){
Packet29DestroyEntity destroyEntityPacket = getDestroyEntityPacket();
sendPacket(player, destroyEntityPacket);
hasHealthBar.put(player.getName(), false);
}
}.runTaskLater(Bar.getInstance(), 40L);
this.cancel();
}
}
}.runTaskTimer(Bar.getInstance(), delay, delay);
}
public static void displayLoadingBar(final String text, final String completeText, final Player player, final int secondsDelay, final boolean loadUp){
final int healthChangePerSecond = 300 / secondsDelay;
displayLoadingBar(text, completeText, player, healthChangePerSecond, 20L, loadUp);
}
}

plugin.yml:

Error (In console):

 

Change:
main: me.Heavymine13.bar.Bar
to
main: me.HeavyMine13.bar.Bar

But in the future please try to keep package names all lower case.

 

Ok now no errors, but the code doesn't work it doesn't show up anything (Should had show a bar of a wither) chasechocolate help me with it plz!

 

You need a PacketUtils class. Did you provide that in the code, if not, that's the reason.

Follow chocolate's code.