i just creat a block which works like the minecraft lightning rod.

i use to detcet if a lightning is strik the entity join world event but i got an error (null but i dont know where and why null):

code:

https://github.com/Luis-st/Forge-1.16.5-36.0.1-mdk/blob/main/forge-1.16.5-36.0.1-mdk/src/main/java/net/luis/cave/events/entity/OnEntityJoinWorldEvent.java

log:

https://github.com/Luis-st/Forge-1.16.5-36.0.1-mdk/blob/main/forge-1.16.5-36.0.1-mdk/src/main/java/net/luis/cave/events/entity/player/Error Log

Edited January 29, 20214 yr by Luis_ST

it's not a Null Pointer Exception (no clue where you got the idea that it was...) it's an Stack Overflow Error. that usually means that you have a funcion that is forever calling itself, in an endless recursive loop. if you look at the log it tells you exactly what function is being called: OnEntityJoinWorldEvent#EntityJoinWorld()

that event handler calls World#addEntity, but whenever an entity is added to the world, it fires the EntityJoinWorldEvent (an you're listening to that event and calling World#addEntity... see the loop?)

1 minute ago, kiou.23 said:

funcion that is forever calling itself

 

2 minutes ago, diesieben07 said:

you that you are being an idiot.

i understand when i check if the lightning is add i canceled the event and add a new lightning

question: when i change the pos of the lightning the event will not called again?

1 minute ago, diesieben07 said:

EntityJoinWorldEvent is fired for any entity joining the world, regardless of position.

i just test it with setPositionAndUpdate and it works