Blocks error

Hello! I'm trying to make my first plugin for bukkit. Plugin will teleport to random location using button on sponge. I getting some errors with blocks:

Code:

Caused by: java.lang.ClassCastException: org.bukkit.craftbukkit.v1_4_6.block.CraftBlockState cannot be cast to org.bukkit.material.Button
    at me.Sahee.RandomLocationButton.Main.onPlace(Main.java:34)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:425)
    ... 18 more

My code:

Code:

  public void onPlace(BlockPlaceEvent e)
    {
    Player p = e.getPlayer(); // player
    Block top = e.getBlock();
    int id = top.getTypeId(); 
    Material isbutton = Material.getMaterial(id);
 
  if(isbutton == Material.STONE_BUTTON || isbutton == Material.WOOD_BUTTON){ // if button
    Button przycisk = ((Button) top.getState()); //
    Block za = top.getRelative(przycisk.getAttachedFace()); //get block what is used to create button
    int id1 = za.getTypeId(); 
    Material spongee = Material.getMaterial(id1);
 
    if(spongee == Material.SPONGE){ //if its sponge start ;)
     
        if(p.hasPermission("RLB.makebutton") || p.isOp()){
            p.sendMessage("[RLM] You created random teleport button succesful");
                 
        }else{
        top.setType(Material.AIR);
        p.sendMessage("[RML] You don't have permissions to make random Teleport buttons. Sorry!");
        //remove button and message no perms     
        }} 
    }else{
    //if material is not sponge 
    }
 
 
    }
  

 

It might be nice to know what exact line of the snippet caused the error

 

this line causes the error: Button przycisk = ((Button) top.getState()); //

hello Sahee,
try to cast the block to Button
(" Button przycisk = ((Button) top; ")

 

Almost true. I forgot to read the error properly, but he is casting a BlockState to Button. Change the line to

Code:java

Button przycisk = (Button)top.getState().getData();

 

fireblast709
can you cast block to?

 

MP5K no, you cast the MaterialData to Button (as Button extends MaterialData)

 

if i'm not mistaken Block top = e.getBlock(); will return the block that is being attached to ( the one you clicked on )
the function e.getBlockAgainst(); should give you the block clicked
to get the block being placed, use Block placed = e.getBlockPlaced();

also i notice you are setting the button to air if permissions fail,
you should be using e.setCancelled(true);
this will simply cancel placing the button

use these imports

import org.bukkit.Material;
import org.bukkit.event.block.BlockPlaceEvent;
code should look like this

Code:

@EventHandler
public void onPlace(BlockPlaceEvent e){
Player p = e.getPlayer(); // player
int bk = e.getBlockAgainst().getTypeId();
int itm = e.getBlockPlaced().getTypeId();
  if(itm == Material.STONE_BUTTON.getId() || itm== Material.WOOD_BUTTON.getId()){ // if button
  if(bk == Material.SPONGE.getId()){ //if its sponge start ;) 
  if(p.hasPermission("RLB.makebutton") || p.isOp()){
  p.sendMessage("[RLM] You created random teleport button succesful");             
  }else{
  e.setCancelled(true);
  p.sendMessage("[RML] You don't have permissions to make random Teleport buttons. Sorry!");//remove button and message no perms 
  }
  }
  }
}

grr, indents failed

 

I love you. Now its working. getTypeId() & getId()--> Ammazing ;D

Ok guys, i made my 1st plugin. RandomLocationTeleport using buttons. Now where i should post this to get "approved"

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

 

bukkitdev.
http://dev.bukkit.org/server-mods/create-project/