[UNSOLVED]NullPointerException

Why does the second line gives a NullPointerException??

Code:

inv
.put(
player, 
items );

 

Technically that is one line... Either "inv", "player", or "items" is null.

 

inv is null for sure.Check if you created instance of HashMap.

 

With his snippet of code, as it literally is only one line and stack traces point to the line number and not variable, there is no possibility to know that for certainty. It is likely though that it is the inventory variable.

 

But I think that there is possibility to pass in HashMap null instead of some variable

 

do:
log.info(inv.toString() + " --- " + player.toString() + " --- " + items.toString());

if any one of those return null, theres your problem!