Solved Setting value in main class with event doesn't work

Hi, Bukkit, I need some help. I have some integer variables in main class before onEnable() function. But when PlayerInteractEvent is called, errors in show up in console ... My code:

Code:java

 
  public int
     lc_x = 0,
     lc_y = 0,
     lc_z = 0,
 
     rc_x = 0,
     rc_y = 0,
     rc_z = 0;
 
//and other onEnable+onDisable+onCommand stuff :p
 
  @EventHandler
   public void ADClick(PlayerInteractEvent event) {
     Action action = event.getAction();
     Player player = event.getPlayer();
 
     if(player.getItemInHand().getType() == Material.BLAZE_ROD) {
       Location l = event.getClickedBlock().getLocation();
       if(action == Action.LEFT_CLICK_BLOCK) {
         if(rc_x == 0 && rc_y == 0 && rc_z == 0) {
           lc_x = l.getBlockX(); // <-- the problem occurs here
           lc_y = l.getBlockY();
           lc_z = l.getBlockZ();
 
           player.sendMessage(ChatColor.GRAY + "[Airdrop] "+ChatColor.GREEN+"First point selected!");
         }
     }
   }
 

Error in console:

Code:

[14:05:27 ERROR]: Could not pass event PlayerInteractEvent to Airdrops v1.0.0 org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:294) ~[craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:501) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:486) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
        at org.bukkit.craftbukkit.v1_7_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:216) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
        at org.bukkit.craftbukkit.v1_7_R3.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:186) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
        at net.minecraft.server.v1_7_R3.PlayerConnection.a(PlayerConnection.java:992) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
        at net.minecraft.server.v1_7_R3.PacketPlayInArmAnimation.a(SourceFile:43)[craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
        at net.minecraft.server.v1_7_R3.PacketPlayInArmAnimation.handle(SourceFile:9) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
        at net.minecraft.server.v1_7_R3.NetworkManager.a(NetworkManager.java:157)[craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
        at net.minecraft.server.v1_7_R3.ServerConnection.c(SourceFile:134) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
        at net.minecraft.server.v1_7_R3.MinecraftServer.v(MinecraftServer.java:667) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
        at net.minecraft.server.v1_7_R3.DedicatedServer.v(DedicatedServer.java:260) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
        at net.minecraft.server.v1_7_R3.MinecraftServer.u(MinecraftServer.java:558) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
        at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java:469) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
        at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:628) [craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
Caused by: java.lang.NullPointerException
        at me.PDKnight.Airdrops.Airdrops.ADClick(Airdrops.java:174) ~[?:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_71]
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_71]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_71]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.7.0_71]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:292) ~[craftbukkit.jar:git-Bukkit-1.7.9-R0.1-10-g8688bd4-b3092jnks]
        ... 15 more

What am I doing wrong? Help me, please!

 

@PDKnight

Code:

Caused by: java.lang.NullPointerException
        at me.PDKnight.Airdrops.Airdrops.ADClick(Airdrops.java:174) ~[?:?]

What's on line 174 in your "Airdrops.java" file?
Add some debug code (System.out.println() / Logger#info() ) to print the values of the variables on the line in question to make sure that nothing is null.

 

@TGRHavoc
It's

Code:

Location l = event.getClickedBlock().getLocation();

I can't understand...

Ohhh, solved! The error appears because I want to get location before checking if player didn't click in the air! Thanks!

<Edited by bwfcwalshy: Merged posts, please use the edit button rather than double posting.>

 

@PDKnight

I don't know if this will affect the outcome but still, worth a shot, try moving that line after the action check (if action == LEFT_CLICK_BLOCK) that way you know the block cannot be null.

Also, before that line add some debug code (e.g. System.out.println("event.getClickedBlock = " + event.getClickedBlock()); ) to make sure that the variables you're using in that line aren't null.