java nullpointerexception in Player_Interact_Event

when i right click i get this error

Code:

11:04:52 [SEVERE] Could not pass event PLAYER_INTERACT to Disposable_boats
java.lang.NullPointerException
        at org.bukkit.plugin.java.JavaPluginLoader$9.execute(JavaPluginLoader.ja
va:252)
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.jav
a:59)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j
ava:255)
        at org.bukkit.craftbukkit.event.CraftEventFactory.callPlayerInteractEven
t(CraftEventFactory.java:162)
        at net.minecraft.server.ItemInWorldManager.a(ItemInWorldManager.java:208
)
        at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:447)
        at net.minecraft.server.Packet15Place.a(SourceFile:57)
        at net.minecraft.server.NetworkManager.a(NetworkManager.java:198)
        at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:72)
        at net.minecraft.server.NetworkListenThread.a(SourceFile:100)
        at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:368)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:283)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:375)

my source is attached (note plugin.yml is not included in the source but it is included in the jar)
how do i fix this error

 

@matter123

When does that error occur? Right-click on any block? Only at signs? On all signs? Please include some details

 

You might check if event.getBlockClicked() is returning null.

Also, this is unrelated, but comparing strings with == and != is not going to work how you expect it to. You need to use .equals().

 

Don't use the plugin generators anymore some are outdated like this one.
Get rid of the constructor in the main class and change the package name to get rid of the .bukkit

 

right click on any block

i don't have a constructor and my package name is com.matter123 what made you think there is a plug in generator

 

Sorry firefox made me open the complete wrong rar because I had another rar in my downloads folder called src so it made me open that up.

EDIT : Your problem is that you never set plistener to a new instance of dbplayerlistener.

 

oh ok
i changed my source around so it checks if getclickedblock!=null it still throws the same error on right click of any block

 

Did you read his edit? That's exactly your problem. When you register your event your listener is null.

 

no he made his edit after i made the post
but thank you for the solution