Solved Change block behind sign

So, I have this code, and suddenly it won't work. Can someone please help me? I want to change the block behind a sign when there is a certain text on line 1 of the sign...

Code:

import org.bukkit.Material;
import org.bukkit.block.Block;
import org.bukkit.block.BlockFace;
import org.bukkit.block.Sign;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.block.SignChangeEvent;
import org.bukkit.material.Attachable;
import org.bukkit.material.MaterialData;
import org.bukkit.plugin.java.JavaPlugin;

public class Main extends JavaPlugin implements Listener {
   
    @Override
    public void onEnable() {
        getServer().getPluginManager().registerEvents(this, this);
    }
   
    @EventHandler
    public void onSignChange(SignChangeEvent e) {
        Sign sign = (Sign) e.getBlock();
        Block block = getAttachedBlock(e.getBlock());
        block.setType(Material.STONE);
    }
   
    public static Block getAttachedBlock(Block b) {
        MaterialData m = b.getState().getData();
        BlockFace face = BlockFace.DOWN;
        if (m instanceof Attachable) {
            face = ((Attachable) m).getAttachedFace();
        }
        return b.getRelative(face);
    }
   
}

 

Does it show any errors? Did you debug? Did anything change since this worked?

 

@Zombie_Striker No, it doesn't show any errors, and it never workt. I also tried block place event but that didn't work as well.

 

@poepdrolify
Debug.

 

@Zombie_Striker How?

 

@poepdrolify Put println() statements at various points in your code to see which parts execute. Is there any reason that the method you've created is a public static method?

 

@AdamQpzm No, it isn't. But, when I want to use it in other classes...

@AdamQpzm @Zombie_Striker Ok, so now I have this error:

Code:

[15:52:43 ERROR]: Could not pass event BlockPlaceEvent to Signs v1.0.0
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:305) ~[spigot.jar:git-Spigot-870264a-0a645a2]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.jav
a:62) ~[spigot.jar:git-Spigot-870264a-0a645a2]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.j
ava:502) [spigot.jar:git-Spigot-870264a-0a645a2]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j
ava:487) [spigot.jar:git-Spigot-870264a-0a645a2]
        at org.bukkit.craftbukkit.v1_8_R2.event.CraftEventFactory.callBlockPlace
Event(CraftEventFactory.java:126) [spigot.jar:git-Spigot-870264a-0a645a2]
        at net.minecraft.server.v1_8_R2.ItemStack.placeItem(ItemStack.java:157)
[spigot.jar:git-Spigot-870264a-0a645a2]
        at net.minecraft.server.v1_8_R2.PlayerInteractManager.interact(PlayerInt
eractManager.java:503) [spigot.jar:git-Spigot-870264a-0a645a2]
        at net.minecraft.server.v1_8_R2.PlayerConnection.a(PlayerConnection.java
:740) [spigot.jar:git-Spigot-870264a-0a645a2]
        at net.minecraft.server.v1_8_R2.PacketPlayInBlockPlace.a(PacketPlayInBlo
ckPlace.java:52) [spigot.jar:git-Spigot-870264a-0a645a2]
        at net.minecraft.server.v1_8_R2.PacketPlayInBlockPlace.a(PacketPlayInBlo
ckPlace.java:1) [spigot.jar:git-Spigot-870264a-0a645a2]
        at net.minecraft.server.v1_8_R2.PlayerConnectionUtils$1.run(SourceFile:1
3) [spigot.jar:git-Spigot-870264a-0a645a2]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [
?:1.8.0_31]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_31]
        at net.minecraft.server.v1_8_R2.SystemUtils.a(SourceFile:60) [spigot.jar
:git-Spigot-870264a-0a645a2]
        at net.minecraft.server.v1_8_R2.MinecraftServer.A(MinecraftServer.java:7
12) [spigot.jar:git-Spigot-870264a-0a645a2]
        at net.minecraft.server.v1_8_R2.DedicatedServer.A(DedicatedServer.java:3
68) [spigot.jar:git-Spigot-870264a-0a645a2]
        at net.minecraft.server.v1_8_R2.MinecraftServer.z(MinecraftServer.java:6
51) [spigot.jar:git-Spigot-870264a-0a645a2]
        at net.minecraft.server.v1_8_R2.MinecraftServer.run(MinecraftServer.java
:554) [spigot.jar:git-Spigot-870264a-0a645a2]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_31]
Caused by: java.lang.ClassCastException: org.bukkit.craftbukkit.v1_8_R2.block.Cr
aftBlock cannot be cast to org.bukkit.block.Sign
        at me.poepdrolify.signs.Main.onSignChange(Main.java:25) ~[?:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0
_31]
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0
_31]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1
.8.0_31]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_31]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:301) ~[spigot.jar:git-Spigot-870264a-0a645a2]
        ... 18 more
>

 

Code:

Sign sign = (Sign) block.getState();

 

@Agentleader1 Thanks