Code Error

A. You haven't defined a world in the location.

B. Can you show the stacktrace?

 

1. Use naming conventions
2. You may not have interacted with a block
3. The block you may not have interacted with may not be a Sign
4. Sign is not a Block subclass
5. The constructor you are using for Location does not exist

 

You need to make add a world to your constructor.

In this case get the players world.

Code (Text):

p.getWorld();

 

Also to add to @Skionz comment. Recheck your if-statement. (here's some help about them)

 

*facepalm*
Look again

'player' does not exist.

 

your if statement still is not correct. You put a semicolon where there should be none and are either missing curly brackets or your spacing is off.

 

Ok then my habbit might not be needed but at least it makes it more readable

And also as said already Sign is not a Block.

Sign is a BlockState

 

It's really hard to read your code if you don't follow code conventions.

 

To fix the problems that you are having: